INVT Photovoltaic Grid-connected Inverter Operation Manual

Operation Manual

Photovoltaic Grid-connected Inverter

INVT Solar Technology (Shenzhen) Co., Ltd.

Preface

The manual is intended to provide detailed information of product information, installation, application, trouble shooting, precautions and maintenance of iMars series grid-tied solar inverters.

The manual does not contain all the information of the photovoltaic system. Please read this manual carefully and follow all safety precautions seriously before any moving, installation, operation and maintenance to ensure correct use and high performance of operation on the inverter.

The use of the iMars series grid-tied solar inverters must comply with local laws and regulations on grid-tied power generation.

The manual needs to be kept well and be available at all times.

All rights reserved. The contents in this document are subject to change without notice.

There may be data deviation because of product improving. Detailed information is in accordant with the final product.

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Three-phase photovoltaic grid-connected inverter Content

Content

Preface ................................................................................................................................................ 1

Content ............................................................................................................................................... 2

1 Safety precautions ......................................................................................................................... 4

1.1 Warning marks .........................................................................................................................................5

1.2 Safety guidance .......................................................................................................................................6

1.2.1 Transport and installation .............................................................................................................6

1.2.2 Grid-connected operation ............................................................................................................7

1.2.3 Maintenance and inspection ........................................................................................................8

1.2.4 Waste disposal ...............................................................................................................................8

2 Product overview ........................................................................................................................... 9

2.1 PV grid-connected power generation system ................................................................................ 10

2.1.2 Supported grid connection structure ...................................................................................... 10

2.2 Product appearance ............................................................................................................................ 11

2.3 Nameplate ............................................................................................................................................. 13

2.4 Product model ....................................................................................................................................... 14

2.5 Outline dimension and weight ........................................................................................................... 15

3 Storage............................................................................................................................................. 16

4 Installation ....................................................................................................................................... 17

4.1 Unpacking confirmation ...................................................................................................................... 18

4.2 Preparation before installation .......................................................................................................... 19

4.2.1 Installation tool ............................................................................................................................. 19

4.2.2 Installation site ............................................................................................................................. 20

4.2.3 Specification of leads ................................................................................................................. 22

4.2.4 Micro breaker ............................................................................................................................... 23

4.3 Mechanical installation ........................................................................................................................ 23

4.3.1 Installation of three-phase inverter ......................................................................................... 24

4.4 Electrical connection ........................................................................................................................... 27

4.4.1 Connection of photovoltaic string ............................................................................................ 27

4.4.2 Three-phase inverter grid connection .................................................................................... 31

5 Running ......................................................................................................................................... 33

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Three-phase photovoltaic grid-connected inverter Content

5.1 Inspection before running ................................................................................................................... 34

5.2 Inverter grid-connected running ........................................................................................................ 34

5.3 Inverter stop .......................................................................................................................................... 35

5.4 Daily maintenance and inspection ................................................................................................... 35

5.4.1 Periodic maintenance on the inverter ..................................................................................... 36

5.4.2 Maintenance guidance .............................................................................................................. 37

6 Display operation panel ............................................................................................................... 42

6.1 LED state indicator .............................................................................................................................. 43

6.2 Operation keypad ................................................................................................................................. 45

6.3 LCD panel .............................................................................................................................................. 45

6.4 Function operation ............................................................................................................................... 46

6.4.1 Monitoring parameter ................................................................................................................. 46

6.4.2 Historical records ........................................................................................................................ 48

6.4.3 Statistic information .................................................................................................................... 48

6.4.4 Parameter setup .......................................................................................................................... 48

6.4.5 System information ..................................................................................................................... 57

6.4.6 Present fault ................................................................................................................................. 57

6.4.7 Inverter control ............................................................................................................................. 57

6.4.8 Mode setup ................................................................................................................................... 59

6.5 Selection of grid certification standard ............................................................................................ 59

7 Monitoring communication ......................................................................................................... 61

7.1 Standard communication .................................................................................................................... 62

7.2 Optional communication ..................................................................................................................... 63

8 Fault isolation ............................................................................................................................... 65

9 Contact us ..................................................................................................................................... 69

10 Appendix ...................................................................................................................................... 70

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Three-phase photovoltaic grid-connected inverter Safety precautions

1 Safety precautions

iMars series grid-tied solar inverters are designed and tested strictly in accordance with relevant international safety standards. As an electrical and electronic device, all relevant safety regulations must be strictly complied during installation, operation, and maintenance. Incorrect use or misuse may result in ：

 Injury to the life and personal safety of the operator or other people.

 Damage to the inverter or other property belonging to the operator or other people.

In order to avoid personal injury, damage to the inverter or other devices, please strictly observe the following safety precautions.

This chapter mainly describes various warning symbols in operation manual and provides safety instructions for the installation, operation, maintenance and use of the iMars series grid-tied solar inverters.

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1.1 Warning marks

Warning marks inform users of conditions which can cause serious physical injury or death, or damage to the device. They also tell users how to prevent the dangers. The warning marks used in this operation manual are shown below:

Mark Name Instruction

Danger

Warning

Forbid

Hot

Note

Danger

Warning

Note

Serious physical injury or even death may occur if not follow relevant requirements.

Physical injury or damage to the device may occur if not follow relevant requirements.

Electrostatic Damage may occur if relevant requirements are sensitive not followed.

High temperature

Do not touch the base of the inverter as it will become hot.

The procedures taken for ensuring proper operation.

Abbreviation

Note

Grounding The inverter must be reliably grounded.

Ensure that DC and AC side circuit breakers

Discharge have been disconnected and wait at least 5 minutes before wiring and checking.

Note: Technical personnel who can perform installation, wiring, commissioning, maintenance, troubleshooting and replacement of the iMars series grid-tied solar inverters must meet the following requirements:

 Operators need professional training.

 Operators must read this manual completely and master the related safety precautions.

 Operators need to be familiar with the relevant safety regulations for electrical systems.

 Operators need to be fully familiar with the composition and operating principle of the entire grid-tied photovoltaic power generation system and related standards of the countries/regions in which the project is located.

 Operators must wear personal protective equipment.

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1.2 Safety guidance

 After receiving this product, first confirm the product package is intact. If any question, contact the logistic company or local distributor immediately.

 The installation and operation of PV inverter must be carried out by professional technicians who have received professional trainings and thoroughly familiar with all the contents in this manual and the safety requirements of the electrical system.

 Do not carry out connection/disconnection, unpacking inspection and unit replacement operations on the inverter when power source is applied. Before wiring and inspection, users must confirm the breakers on DC and AC side are disconnected and wait for at least 5 minutes.

 Ensure there is no strong electromagnetic interference caused by other electronic or electrical devices around the installation site.

 Do not refit the inverter unless authorized.

 All the electrical installation must conform to local and national electrical standards.

 Do not touch the housing of the inverter or the radiator to avoid scald as they may become hot during operation

 Ground with proper technics before operation.

 Do not open the surface cover of the inverter unless authorized. The electronic components inside the inverter are electrostatic sensitive. Do take proper anti-electrostatic measures during authorized operation.

1.2.1 Transport and installation

 During storage or transport, ensure the inverter package and the chassis is intact, dry and clean.

 The movement and installation of the inverter require at least two persons due to its heavy weight.

 Select proper tools for movement and installation to ensure the inverter can operate normally and avoid physical injury. The installation personnel must take

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Three-phase photovoltaic grid-connected inverter Safety precautions mechanical protective measures such as wearing anti-drop shoes or working clothes to protect physical security.

 The inverter must be installed by professional technicians.

 Do not store or install the inverter on flammable and combustible objects; keep the inverter away from flammable and combustible objects.

 Do not install the inverter in places easily accessible to children or other public.

 Remove the metal accessories in hands eg ring or bracelet before device installation and electrical connection to avoid electric shock.

 The solar battery component exposed to the sunlight may generate dangerous voltage. Users must cover the battery component with fully-lightproof materials before electrical connection

 The inverter input voltage cannot exceed the max input voltage, otherwise the inverter may be damaged.

 PV grid-connected inverter is not applicable to the positive or negative ground system of solar battery component.

 Ensure inverter PE is grounded properly, otherwise the inverter cannot run normally.

 Ensure the inverter is installed firmly and electrical wiring is reliable.

Note: PV grid-connected inverter is only suitable for crystalline silicon-type solar battery component.

1.2.2 Grid-connected operation

 Permissions by local electric power agency must be obtained and the inverter grid-connected power generation operation must be done by professional technicians.

 All electrical connections must meet the electrical standards of the countries/regions in which the project is located.

 Ensure the inverter is installed firmly and electrical wiring is reliable before operating on the inverter.

 Do not open the housing of the inverter when the inverter is working or powered up.

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1.2.3 Maintenance and inspection

 The maintenance, inspection and repair of the inverter must be done by well trained and qualified professional technicians.

 Contact distributors and manufactures for repair of the inverter.

 In order to avoid irrelevant personnel from entering the maintenance area during maintenance, temporary warning labels must be placed to warn non-professionals to enter or use fence for isolation.

 Before carrying out any maintenance operations, users must disconnect the breaker on grid side, then disconnect the breaker connected to the PV component and wait for at least 5 minutes until the internal parts of the inverter are fully discharged.

 The internal of the inverter are mostly electrostatic-sensitive circuits and parts, users must follow electrostatic protection protocols and take anti-electrostatic measures.

 Do not use components provided by other companies when repairing the inverter.

 The inverter can be started again for grid-connected power generation only after confirming there is no fault that may impact the safety performance of the inverter.

 Do not get close to or touch the grid or any metal conductive parts in the PV power generation system during operation, otherwise electric shock or fire may occur. Take note of any safety marks and instructions similar to “Danger, electric shock risk”.

1.2.4 Waste disposal

 Do not dispose of the inverter together with household waste. The user has the responsibility and obligation to send it to the designated organization for recycling and disposal.

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Three-phase photovoltaic grid-connected inverter Product overview

2 Product overview

This chapter mainly describes the appearance, package accessories, nameplate and technical parameters of the grid-connected inverter.

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2.1 PV grid-connected power generation system

PV grid-connected power generation system is comprised of solar battery component, grid-connected inverter, power energy gauging device and public grid.

Fig 2.1 Application of PV grid-connected inverter

The PV grid-connected inverter is the core part of solar PV grid-connected power generation system. The sunlight can be converted to DC energy through PV component, then it is converted to the sine AC current which has the same frequency and phase position with the public grid via photovoltaic grid-connected inverter, and feedback such energy to the grid.

 It is recommended that the PV array to be installed conforms to IEC 61730 class

A standards.

2.1.2 Supported grid connection structure iMars series grid-tied solar inverters support TN-S, TN-C, TN-C-S , TT and IT grid connection.

When applied to the TT connection, the N-to-PE voltage should be less than 30V.

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2.2 Product appearance

Figure 2.2 Type of grid

Fig 2.3 Appearance of 40-70kW three-phase PV inverter

Table 2-1 Instruction for key cosmetic parts of three-phase PV inverter

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No

1

2

3

4

5

6

7

8

Name

Display operation panel LED state indicator

Surface cover

DC input interface

Communication interface

AC terminal

Instruction

Inverter DC input port, connect to PV array

RS485 communication interface and its extension port EXT

Hanging slot

Inverter AC output port, connect to public grid

The docking port between inverter master and installation bracket

The force bearing point when moving the inverter Handle

Safety precautions

Indicate the rated inverter parameters 9 Nameplate

10 Anti-theft screw hole

11

Fan installation component

12 DC switch

Used to fix the inverter to the installation bracket

Air inlet port, used to fix the fan

Switch on or switch off DC input

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2.3 Nameplate

Figure 2.4 shows the inverter nameplate.

Figure 2.4 Inverter nameplate

（

1

）

Trademark and product type

（

2

）

Model and important technical parameters

（

3

）

Certification system of the inverter confirming

（

4

）

Serial number, company name and country of origin

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Icons Instruction

 TUV certification mark. The inverter is certified by TUV.

 CE certification mark. The inverter complies with the CE directive.

 CQC certification mark. The inverter passed CQC certification.

 EU WEEE mark. The inverter cannot be disposed of as domestic waste.

2.4 Product model

Table 2-3 Models of three-phase PV grid-connected inverter

Product name Model

Rated output power

(W) three-phase(L1, L2, L3, N, PE) three-phase photovoltaic grid-connected inverter three -phase photovoltaic grid-connected inverter three -phase photovoltaic grid-connected inverter three -phase photovoltaic grid-connected inverter three -phase photovoltaic grid-connected inverter three -phase photovoltaic grid-connected inverter

40kW

50kW

60kW

70kW

50KW -HV

70KW -HV

40kW

50kW

60kW

66kW

50KW

70KW

Note: Technical parameters of iMars series inverter refers to appendix

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2.5 Outline dimension and weight

D W

H

Fig 2.6 Outline dimension of the inverter

Table 2-4 Dimension and net weight of the inverter

Model Height(mm) Width(mm)

40-70kW

70kW -HV

50kW-HV

810

810

660

645

645

645

Depth(mm)

235

235

255

Net weight(kg)

52

52

55

D

W

H

Fig 2.6 Dimension of paper package

Table 2-5 Package dimension and gross weight

Model

Height

(mm)

Width

(mm)

40-70kW 990 810

Depth

(mm)

420

70kW -HV

50kW-HV

990

835

810

815

420

410

Weight

(kg)

62

62

60

Package material

K3K

K3K

K2K

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Three-phase photovoltaic grid-connected inverter Storage

3 Storage

If the inverter is not put into use immediately, the storage of inverter should meet the following requirements:

 Do not remove the outer packing.

 The inverter needs to be stored in a clean and dry place, and prevent the erosion of dust and water vapor.

 The storage temperature should be kept at -40°C~+70°C, and the relative humidity should be kept at 5%RH~95%RH.

 The stacking of inverters is recommended to be placed according to the number of stacking layers in the original shipment. Place the inverter carefully during stacking to avoid personal injury or equipment damage caused by the falling of equipment.

 Keep away from chemically corrosive substances that may corrode the inverter.

 Periodic inspections are required. If damages are found by worms and rats, or packaging are found to be damaged, the packaging materials must be replaced in time.

 After long-term storage, inverters need to be inspected and tested by qualified personnel before put into use.

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Three-phase photovoltaic grid-connected inverter Installation

4 Installation

This chapter describes how to install the inverter and connect it to the grid-tied solar system (including the connection between solar modules, public grid and inverter).

Read this chapter carefully and ensure all installation requirements are met before installation. Only qualified electricians are allowed to install the inverter.

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4.1 Unpacking confirmation

The inverter has been thoroughly tested and rigorously checked before delivery, but damage may still occur during transportation. Before unpacking, check carefully whether the product information in the order is consistent with that on the nameplate of the package box and whether the product package is intact. If any damage is detected, please contact the shipping company or the supplier directly. Please also provide photos of the damage to get our fastest and best service.

Store the idled inverter in its original package and take anti-moisture and anti-dust measures.

After taking the inverter out of the box, check the following items:

(1) Confirm the main body of the inverter is intact and free from any damage;

(2) Confirm there is operation manual, interface accessories and installation accessories inside the package box;

(3) Confirm the deliverables inside the package box are intact and complete;

(4) Check whether the product information in the order is consistent with that on the inverter nameplate;

(5) The standard delivery list is shown below.

Standard deliverables of three-phase inverter:

Fig 4.1 Deliverables of 40 –70kW three-phase inverter

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Table 4-1 Deliverables of three-phase inverter

No Name Quantity

6

7

8

9

3

4

1

2

5

Inverter

Installation bracket

Punch positioning plate

User manual

Communication connector

DC connector

Expansion bolt M8*60

Hex combination bolt M8*20

Combination bolt M5*20

1

6

1

1

1

40KW:8pairs,50KW:10 pairs, 60/70KW:14 pairs

6

6

2

10 AC ring terminal 5

Check above-mentioned items carefully and if any question, contact the supplier immediately.

4.2 Preparation before installation

4.2.1 Installation tool

Table 4-2 List of installation tool

No Installation tool

1

2

3

4

Marker

Electric drill

Hammer

Adjustable wrench

5

6

7

8

9

10

11

Inner hex screwdriver

“Slotted” or “cross-head” screwdriver

Megameter

Multimeter

Electric soldering iron

Wire crimper

Hydraulic clamp

Purpose

Indicate the installation hole

Drill holes in the bracket or on the wall

Knock on the expansion bolt

Fix the installation bracket

Tighten the anti-theft screw and disassemble

AC junction box

AC wiring

Measure the insulation performance and grounding impedance

Check the circuit and measure AC/DC voltage

Solder the communication cable

Crimp DC terminal

Crimp ring terminal for AC wiring

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4.2.2 Installation site

Select installation site according to below requirements:

(1) The height of the installation position should ensure that the line of sight is on the same level as the LCD for viewing the parameters inverter conveniently.

Figure 4.2 Optimal mounting height

(2) The installation site must be well ventilated and away from raindrops or direct sunlight.

(3) There must be enough pre-reserved space around the installation site for convenient disassemble of the inverter and air convection, as shown in Fig 4.3.

Fig 4.3 Installation spacing

When install more than one inverter, it is necessary to reserve a certain space between the inverters. The left and right spacing is shown as Figure 4.4, and the upper and lower sides of the inverter should have sufficient space to ensure good heat dissipation.

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Figure 4.4 Side-by-side installation space requirements

(4) The ambient temperature of installation should be -25°C~60°C

(5) The installation site should be away from electronic devices which can generate strong electromagnetic interference

(6) The inverter should be installed on firm and solid surface eg wall surface and metal bracket

(7) The installation surface should be vertical to the horizontal line, as shown in Figure 4.5

Install the inverter vertically or backward ≤ 15 ° to facilitate heat dissipation.

Do not tilt the inverter forward, horizontal, upside down, over- backward, and roll when install the inverter.

Fig 4.5 Installation position of the inverter

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（ 8 ） The installation should ensure that the inverter is reliably grounded, and the material of grounded metal conductor should be consistent with the metal material reserved for the grounding of the inverter.

 Do not open the surface cover of the inverter or replace any part as incomplete inverter may cause electric shock and damage the device during operation.

4.2.3 Specification of leads

In order to regulate and compatible with the inverter AC/DC connector or terminal block specifications, below requirements on the AC/DC leads connected to corresponding inverter models should be fulfilled:

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Table 4-3 Recommended lead specification

DC side AC side

Inverter model

Min cross-section mm²(length ≤50m)

Min cross section areamm²

(Length>50m)

Min cross section areamm²

(Length ≤50m)

L N/PE

Recommended terminals

L PE

40kW

50kW

60kW

70kW

4

4

4

4

6

6

6

6

25

25

35

35

16

16

25

25

GTNR25-6 GTNR16-5

GTNR25-6 GTNR16-5

GTNR35-6 GTNR25-5

GTNR35-6 GTNR25-5

4.2.4 Micro breaker

In order to ensure safe operation of the inverter and circuits, it is recommended to configure corresponding micro breaker or fuse on the DC input end and AC output end of the inverter. Table

4-4 is the requirements recommended for micro breaker:

Table 4-4 Specification of micro breaker

Inverter model

40kW

DC side

Recommended breaker specification

DC1000V, C100A, 2P

50kW

60kW

70kW

DC1000V, C100A, 2P

DC1000V, C150A, 2P

DC1000V, C150A, 2P

AC side

Recommended breaker specification

AC400V, C80A, 4P

AC400V, C100A, 4P

AC400V, C150A, 4P

AC400V, C150A, 4P

4.3 Mechanical installation

The material for fixing the inverter and the installation mode vary with the different installation sites.

It is recommended to install the inverter vertically to the firm wall or metal bracket. Here we take wall installation as an example to introduce the installation matters of the inverter. Note that the mechanical installation modes for single-phase and three-phase inverter are slightly different as they carry differing outline structures.

As shown in the fig 4.5, the overall installation of the inverter should be vertical to the horizontal surface.

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4.3.1 Installation of three-phase inverter

Fig 4.6 Installation bracket of 60kW three-phase inverter

Table 4-5 Dimension of three-phase inverter installation bracket

Spacing of installation hole

Inverter model

A(mm) B(mm)

40-70kW

70kW-HV

50kW-HV

430

430

400

330

330

400

The procedures for installing 3-phase PV inverter are listed below:

(1) Use the punch positioning plate in the packaging box to determine the punch position.

As shown in Figure 4.7. Level the holes with a level ruler and mark it with a marking pen.

Figure 4.7 Determine the punch position

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(2) Drill 6 installation holes on the wall with electric drill. As shown in Figure 4.8

Figure 4.8 Drilling

(3) Fix the expansion bolts to the 4/6 installation holes with hammer, as shown in Figure 4.9.

Figure 4.9 Install expansion bolts

(4) Fix the installation bracket onto the expansion bolts and ensure the installation is firm enough(tightening torque is 13N • m) . As shown in Figure 4.10.

Figure 4.10 Fix the installation bracket

25


(5) Hang the inverter onto the installation bracket and ensure the installation is firm enough.

As shown in Figure 4.11.

Figure 4.11 Installation of inverter

(6) Ensure the inverter is installed properly and tighten the M5X20 bolts into the screw holes on the left and right side of inverter(tightening torque is 3N • m). As shown in Figure 4.12.

Figure4.12 Installation of M5X20 bolts

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4.4 Electrical connection

This section presents the detailed contents and safety precautions related to electrical connection.

Fig 4.13 is the connection diagram for PV grid-connected system.

Note

Fig 4.13 Connection diagram for PV grid-connected system

 Electrical connection must be carried out by professional technicians as wrong operation may cause damage to the device, physical injuries or even death during system operation.

 All the electrical installation must conform to the national and regulations concerning electrical safety regulations.

 Ensure all the cables are installed firmly according to the specified safety requirements and free from any damage.

 It is not allowed to close the AC and DC breakers before the inverter is electrically connected.

 Read this section carefully and operate strictly according to the requirements.

 Note the rated voltage and current value specified in the manual as they cannot be exceeded.

4.4.1 Connection of photovoltaic string

Plan 1: Use PG head

27


PV+wiring diagram

PV + PV + PV +

PV + PV +

PV-wiring diagram

PV PV PV -

PV +

PV PV PV -

Fig 4.14 Connection of DC connector and PV string

The procedures for connecting three-phase PV inverter DC input to the PV string are shown below:

(1)Before connecting the inverter to PV string, ensure proper measures against lightening and short circuit have been taken;

 three-phase PV inverter can be connected only after protection measures which conform to local electrical regulations are taken and the technical parameters in this manual are fulfilled.

(2) Open the wiring bin of the inverter, make the anode and cathode of the PV string whose terminals have been well crimped go through the water-proof PG head, and fix the terminals to corresponding position, and ensure the conductor of the lead is unexposed and crimped firmly;

28


(3) Before connecting DC connector to inverter, use a multimeter to measure the voltage of the DC input string, verify the polarity of the DC input cable, and ensure that the voltage of each string is within the allowable range of the inverter, as shown in Figure 4.16.

 The PV string connected to 3-phase PV inverter DC input must adopt the DC connector configured especially for the inverter, do not use other connection devices without authorization from our company, otherwise damage to the device, unstable operation or fire may occur and our company will not undertake quality assurance or assume any direct or joint liability thereof.

Plan 2: Use straightly-inserted terminal

Step 1: Connect the outlet of PV board to the terminal delivered along with the machine

Figure 4.15 Connection of MC4 DC connector and PV string

(1) Lighting, short-circuit and other protection measures which meet the local electrical safety laws and regulations are needed before the connect PV strings to inverter

 PV strings can be connected to inverter only after protection measures which conform to local electrical regulations are taken and the technical parameters in this manual are fulfilled.

29


(2) Connect the output cables of solar modules to the DC connector as figure 4.15 shows.

Loose the nut of connector and remove the isolation layer of the DC cable for about 15mm.

Insert it into the connector and press until heart the lock sound. Finally lighten the nut to a torque of 2.5-3 Nm. The wiring of negative pole is the same as that of the positive pole.

Ensure the poles of solar modules are well connected with the connectors;

(3) After the DC connector is connected, use a multimeter to measure the voltage of the DC input string, verify the polarity of the DC input cable, and ensure that the voltage of each string is within the allowable range of the inverter, as shown in Figure 4.16.

Figure 4.16 DC input voltage measuring

 The PV string connected to iMars series inverter must adopt the DC connector configured especially for the inverter, do not use other connection devices without authorization from our company, otherwise damage to the device, unstable operation or fire may occur and our company will not undertake quality assurance or assume any direct or joint liability thereof.

Step 2: After connecting the terminal, inset it into the MC4 terminal of the machine

(1) Connect PV string to the inverter and ensure tightly-fastened, as shown in Figure 4.17

(2) When removing the DC connector from the inverter, insert the head of the straight screwdriver into the raised hole in the middle of the connector, and force the movable end of the connector to exit.

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DC

AC

Figure 4.17 Connect PV string to inverter

4.4.2 Three-phase inverter grid connection

4.4.2.1 Terminal block grid connection

First, take off the protection cover of the AC connector and the bottom panel of the machine, then connect the five leads L1, L2, L3, N (optional) and PE of three-phase public grid to the AC connector interface , and ensure the conductor of the lead is unexposed and crimped firmly; then connect the connection port of AC connector to the AC connection port of the inverter, and ensure the leads of AC cable correspond to the connection ports of the connector and are tightened firmly.

Fig 4.18 three-phase inverter 40 –70kW grid connection

4.4.2.2 Parallel connection requirements of multiple inverters

Connect multiple inverters to low-voltage three-phase grid directly. If the total capacity of the inverter exceeds 1.6MVA, contact our after-sale service staff.

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Connect multiple inverters to the low-voltage side of the medium-voltage transformer and connect high-voltage side to the medium-voltage grid directly. If total capacity of the inverter exceeds

1.6MVA, contact our after-sale service staff. Meanwhile, the transformer should fulfill total output requirement of the inverter and has neutral point or externally-connected neutral conductor.

 It is recommended to use the transformer whose short-circuit impedance is no more than 7%

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Three-phase photovoltaic grid-connected inverter Running

5 Running

This chapter mainly introduces operations related to to the usage of PV inverter, which involves inspection before running, grid-connected running,inverter stop and daily maintenance precautions.

33


5.1 Inspection before running

The following items must be checked strictly before running the PV grid-connected inverter

(including but not limited to the following items):

(1) Confirm the installation site of the inverter fulfill requirements of section 4.2.2 to ensure convenient installation, disassemble, operation and inspection on the inverter;

(2) Confirm the mechanical installation of the inverter fulfills requirements of section 4.3;

(3) Confirm the electrical connection of the inverter fulfills the requirements of section 4.4;

(4) Confirm all the switches are in “OFF” state;

(5) Confirm the open-circuit voltage of PV component conforms to the parameter requirements of inverter DC side in appendix;

(6) Confirm the electrical safety marks on the installation site is clear enough.

 In order to ensure a safe, normal and stable operation of the PV power generation system, all the newly installed, renovated and repaired PV grid-connected power generation system and its grid-connected inverter must undergo inspection before running.

5.2 Inverter grid-connected running

Start the inverter according to below steps to achieve grid-connected operation of the inverter:

Note



It is a must to select the country to set grid-connected standard during the initial operation of the inverter, see details at section 6.5.

 Keep the power-on state of the inverter for at least 30 minutes, and complete the charging of built-in clock battery of the inverter to ensure the clock can run normally!

(1) Confirm the requirements in section 5.1 are fulfilled;

(2) Close the breaker on inverter public grid AC side;

(3) Close the integrated DC switch of the inverter;

(4) Close the circuit switch on PV string DC input side;

(5) Observe the LED indicator state of the inverter and the information displayed by LCD.

Refer to chapter 6 for LED state indicator and LCD display information.

34


Run green indicator flickers, other indicators are off: inverter is powered on and under self-inspection, wait for enough light to fulfill grid-connected condition;

Run green indicator is on and other indicators are off: inverter self-inspection has passed and grid-connected power generation is on – pilot run succeeded.

“Warn” or “Fault” indicator is on or flickers: inverter is powered on but system fault occur.

Refer to section 6.3 to check the fault code in LCD display, stop the inverter as per section

5.3, and rule out faults according to chapter 8. After all the faults are removed, repeat the operations in chapter 5.

(6) Set the inverter time according to local time setup; refer to section 6.4.4 to complete time setup.

(7) The default DC input mode of PV gridconnected inverter is “independent” mode; refer to section 6.4.4 to check and set DC input mode.

5.3 Inverter stop

When it is necessary to carry out power-off maintenance, inspection and fault elimination on the inverter, stop the inverter according to the following steps:

(1) Disconnect the breaker on inverter public grid AC side;

(2) Disconnect the integrated DC switch of the inverter;

(3) Disconnect the circuit switch on PV string DC input side;

(4) Wait for at least 5 minutes until the internal parts of the inverter are fully discharged, and complete the stop operation.

5.4 Daily maintenance and inspection

In solar PV grid-connected power generation system, the 3-phase PV grid-connected inverter can realize grid-connected power generation and stop/start operations automatically day and light in whatever seasons. In order to safeguard and prolong the service life of the inverter, it is necessary to carry out daily maintenance and inspection on the inverter besides using the inverter strictly according to this manual.

35


5.4.1 Periodic maintenance on the inverter

Item Inspection mode

Adopt monitoring software to read the inverter data in real time, and backup the data recorded by monitoring

Maintenance period

Save the inverter running software periodically. Save the inverter running data, data parameters and logs into the file, check the monitoring software and various parameter setup of the inverter.

Once per quarter

Observe whether the inverter is installed firmly, damaged or deformed. Listen for abnormal noise during

Inverter running inverter operation. Check the variables during system state grid-connected running. Check whether the temperature of inverter enclosure is normal and monitor

Once per half a year the heating condition with thermal imager.

Clean the inverter

Check the RH and dust around the inverter, and clean the inverter when necessary. Refer to section 5.4.2.

Once per half a year

Electrical connection

Check whether system cable connection and inverter terminal block are loosened, if yes, secure them again in the manner specified in section 4. Check whether the Once per half a year cable is damaged, and whether the cable skin touched by the metal surface is cut.

For three-phase inverters, observe whether the air

Maintenance inlet/outlet is normal; check whether there are cracks on and the fan leaf. Listen for abnormal noise during fan replacement of rotation. Clean the air inlet/outlet if necessary; If any

Once per half a year cooling fan abnormity occurred to the fan, replace the fan immediately . Refer to section 5.4.2.

Check the inverter LCD and stop function of the system.

Safety function

Simulate stop operation and check the stop signal communication. Check the warning marks and replace

Once per half a year them if necessary.

36


5.4.2 Maintenance guidance

The operation steps of the BG40-70KTR and BG70KTR-HV are as follows:

Clean the inverter

The cleaning steps are listed below:

(1) Disconnect the connection on input and output side;

(2) Wait for ten minutes;

(3) Clean the surface and air inlet/outlet of the inverter with soft brush or vacuum cleaner;

(4) Repeat the operations in section 5.1;

(5) Restart the inverter.

Clean the fan

The cleaning steps are listed below:

(1) Disconnect the connection on input and output side;

(2) Wait for ten minutes;

(3) Disassemble the inverter in the same process with theinstallation procedures in section 4, but in reverse order;

(4) Remove the screws and covers of cooling bin or fan box as shown below:

Fig 5.1 Disassemble the cooling bin

Fig 5.2 Disassemble the fan box

(5) Clean the inverter cooling bin and fan with soft brush or vacuum cleaner.

37


(6) Install the screws and covers of cooling bin or fan box to their original place.

(7) Install the inverter to its original place again according to section 4.

(8) Repeat the operations in section 5.1.


Fan replacement

If high temperature occurred to the inverter or abnormal noise occurred during fan rotating, replace the fan. Note that the fan should be replaced by professionals only.

 Stop the inverter before maintenance operation, and disconnect all the power inputs of the inverter.

 Before carrying out maintenance operation, wait for at least 10 minutes until the internal capacitors of the inverter are fully discharged,

 The fan can be maintained and replaced by professional electricians only.

How to replace the fan:

(1) Disconnect AC breaker;

(2) Turn the DC switch to “OFF” position;

(3) Wait for at least 10 minutes;

(4) Disconnect all the electrical wirings at the bottom of the inverter;

(5) Lift up the inverter with the help of others and take the inverter off the wall.

(6) Place the inverter on the operation platform;

(7) Disassemble the fan box as shown in fig 5.2.

(8) Disassemble the damaged inverter fan as shown in fig 5.3, then install the fan back to its original position, and connect the fan power and control cable.

Fig 5.3 Replace the fan

(9) Install the screws and covers of cooling bin or fan box to their original position.

(10) Install the inverter to its original position again according to section 4.

(11) Repeat the operations in section 5.1;

38



 Do not start the inverter immediately if it alarms and stops. Figure out the cause

Note according to section 5.1 and confirm all the faults are removed before starting again.

The operation steps of the BG50KTR-HV are as follows:

Inverter cleaning

The cleaning steps are as follows:

（ 1 ）

（ 2 ）

（ 3 ）

（ 4 ）

（ 5 ）

Fan cleaning

The cleaning steps are as follows:

(1) Disconnect the input and output of inverter.

(2) Wait ten minutes.

(3) Disassemble the inverter in the reverse of the installation procedure in section 3.

Remove the screws and cover of the heat sink or fan case. As shown below:

Figure 5.4 Disassembly of the heat sink

Figure 5.5 Disassembly of fan box

39


（ 1 ）

（ 2 ）

（ 3 ）

（ 4 ）

（ 5 ）

Replace the fan

If the inverter has high temperatures or the fan is running abnormally, replace the fan. This operation must be performed by professionals.

 The inverter must be shut down and all power inputs of the inverter must be disconnected before maintenance work begins.



Wait at least 10 minutes, the maintenance work can only be carried out after the capacitor inside the inverter has been discharged.



Only professional electricians can perform fan maintenance and replacement work.

The fan replacement steps are as follows:

(1) Disconnect AC circuit breaker.

(2) Turn the DC switch to the "OFF" position.

(3) Wait at least 10 minutes.

(4) Disconnect all electrical connections from the bottom of the inverter.

(5) Lift the inverter with the help of others and remove the inverter from the wall.

(6) Place the inverter on the operating platform.

(7) Disassemble the fan case as shown in Figure 5.4

(8) As shown in Figure 5.6, remove the damaged inverter fan, install the good fan to the original position, and connect the fan power supply and control cable.

Figure 5.6 Replace the Fan

(9) Install the screws and cover of the heat sink or fan box to their original positions.

(10) Reinstall the inverter to its original position in accordance with section 4.

40


(11) Repeat the operation in Section 5.4


Note

 Once the inverter stops due to an alarm, it is forbidden to start the machine immediately. The cause should be identified and all faults must be eliminated before starting up. Inspections should be carried out in strict accordance with the procedures in Section 5.4.

41

Three-phase photovoltaic grid-connected inverter Display operation panel

6 Display operation panel

This chapter mainly presents the usage of inverter display andoperation panel, including LED state indicators and operation keypads.

42


Users can obtain the running state and running parameters of the inverter through LED indicators and the information in LCD display, or change the content displayed in LCD and set the inverter parameters via operation keypad, as shown in fig 6.1.

LCD display p

！ Alarm

Input V 1 : 000 . 0 V

Input I 1 : 000 . 0 A h

Input V 2 : 000 . 0 V

02 . A 001 Menu

LED indicator

Operation keypad

Fig 6.1 Inverter display operation panel

6.1 LED state indicator

There are three LED state indicators in the inverter display operation panel, they are:

(1) “Run”, running state indicator, green light;

(2) “Warn”, restorable fault alarm indicator, yellow light;

(3) “Fault” ， non-restorable fault alarm indicator, red light.

The inverter states can be divided into sleep, self-inspection, grid-connected power generation, restorable fault, non-restorable fault and manual turn-off; the LED indicators carry three states:

OFF, flicker and ON. Refer to table 5-1 for LED indicator and inverter states.

“ ” indicates the LED is OFF;

“ ”(green), “ ”(yellow), “ ”(red) indicate that LED flickers at .25s or 0.58s interval;

“ ”(green), “ ”(yellow), “ ”(red) indicates the LED is ON.

43


Table 6-1 LED indicator and inverter state

Inverter state LED indicator State description

Sleep

Run

Warn

Fault

Inverter is not power on; all the LED indicators are

OFF.

Self-inspection

Grid-connected power generation

Restorable fault state

Non-restorable fault state

Run

Warn

Fault

Run

Warn

Run

Warn

Fault

Run

Warn

Fault

Fault

Run

Warn

Fault

Run

Warn

Fault

Inverter DC input is power on and fulfills self-inspection condition; green light flickers at

0.25s interval and other indicators are OFF.

All is normal after inverter self-inspection, and grid-connected power generation is on; green light is ON and other LED indicators are OFF.

(1) Grid-connected power generation is on, but clock is abnormal (A007);

(2) Grid-connected power generation is on, but DC input is abnormal (A001 or E001);

(3) Grid-connected power generation is on, but fan fault occurred (E006 or E012);

Green and yellow lights are ON, other LED indicators are OFF.

Inverter sleep state, pubic grid abnormal (A001,

A003, A004, A005 or A006);

Yellow light flickers at 0.5s interval, other LED indicators are OFF.

(1) Inverter sleep state, inverter temperature is abnormal (E006);

(2) Inverter sleep state, DC input is abnormal

(E001);

Yellow light is ON, other LED indicators are OFF.

Inverter hardware or software fault (E003, E004,

E005, E008, E009, E011, E013 or E015), inspection is required, separate the inverter from the system immediately;

Red light flickers at 0.5s interval, other LED indicators are OFF.

44


Run

Warn

Fault

Electric leakage occurred to the inverter, or the quality of inverter output energy is unqualified

(E007, E010, E014, E017, E018 or E020), inspection is required, separate the inverter from the system immediately;

Red light is ON, other LED indicators are OFF.

Manual OFF state

Run

Warn

Fault

Turn off after receiving communication command or keypad command, all the three indicators are ON

Note Detailed inverter fault information and solutions, refer to chapter 5 and chapter 7.

6.2 Operation keypad

The operation keypad area of inverter display operation panel has four buttons, they are:

(1) “ESC”: Exit and return;

(2) “ ”: Page up and value up;

(3) “ ”: Page down and value down;

(4) “ENT”: Confirm.

6.3 LCD panel

The LCD of inverter display operation panel supports graphics and backlight effect. Under sleep or running state of the inverter, if there is no button action in 15s, LCD backlight will turn off automatically; press any key on the operation manual can light up the LCD backlight again, then press “ENT” key to enter the main menu interface of the inverter LCD (as shown in fig 6.3) where users can view parameters and carry out setups.

The LCD interface is divided into main interface and menu interface, and the former is the default interface at power up. In menu interfaces at all levels, users can check inverter monitoring parameters, historical records, system information, statistic information and current fault information, etc, or set LCD display language, time, inverter communication address, user password, ON/OFF operation, restore to default values, etc.

Display area of curve graphs

Display area of text parameters

State display area Dynamic fault code Menu entrance

Fig 6.2 Main interface of inverter LCD

45


The main interface of inverter LCD is shown in fig 6.2:

(1) The curve graph display area displays the power change curve of current day;

(2) Text parameter display area displays the key running parameters of current inverter operation, which displays three rows of parameters every time. Under running or sleep state of the inverter, the displayed content rolls up per screen at 3s interval; press “ ” or

“ ” to look through the displayed content;

(3) State display area displays current running state of the inverter, which can display

“self-inspection”, “grid-connected power generation”, “alarm”, “fault”, “OFF” state;

(4) Dynamic fault code and menu entrance. When the state display area displays “alarm” or

“fault”, the dynamic fault code area will display corresponding fault code (display up to 8 fault codes).

6.4 Function operation

Users can view parameters and perform setup operations via the operation keypad and the LCD on the operation panel.

Main menu

Monitoring parameter

Previous record

Statistic information

Parameter setup

System information

Current fault

Fig 6.3 Main menu interface of inverter LCD

6.4.1 Monitoring parameter

Press “ ” or “ ” on the main menu to select “monitoring parameter”, and press “ENT” key can view the monitoring parameters of the inverter, as shown in fig 6 .4. Press “ ” or “ ” to flip the screen, press “ESC” to return.


Power generated today: 0Wh

Amount saved today: € 0.00

Input power: 0.00kW

Fig 6.4 Monitoring parameter

The parameters displayed vary with the different models of the inverter, as shown in table 62. “ ● ” indicates the “monitoring parameters” can be displayed by corresponding inverter LCD.

46


Table 6-2 Monitoring parameter

Item

Power generated today

Saved today

Input power

Output power

Peak power

Grid voltage (U)

Grid voltage V

Grid voltage W

Grid current (U)

Grid current V

Grid current W

Grid frequency

Power factor

Input V (V1)

Input I (I1)

Input V2

Input I2

Grounding resistance

Leakage current

Temperature 1

Temperature 2

Total power

Total time

Current date

Current time

Up time of initial power-on

Initial working time

Time when today’s peak power occurred

Time when today’s power generation ends

Time when yesterday’s power generation ends

40-70kW / 70kW-HV / 50kW-HV

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

47


6.4.2 Historical records

Press “ ” or “ ” in the main menu to select “historical record”, then press “ENT” to view the historical records of partial running parameters of the inverter, as shown in fig 6.5.

Historical record 0

2012/01/05 11:32:16

A005: AC under-frequency

Fig 6.5 Historical record

“Historical record” can display 32 pieces of historical information, press “ ” or “ ” key to look through the historical information, press “ESC” to return. The number on the upper right corner of the first row is the number of historical record, the 2 nd

row (as shown in fig 6.5) displays the date and time when fault occurred or restored, and the 3 rd

row displays detailed information of fault code. When the 3 rd

row displays in inverse color, it indicates fault occurred, otherwise it is fault restored.

6.4.3 Statistic information

Press “ ” or “ ” key in the main menu to select “statistic information”, then press “ENT” key to enter “statistic menu”, as shown in fig 6.6.

Lifelong information

Statistic menu

Today ’ s statistics

Fig 6.6 Statistic information

The content that can be viewed in “statistic menu” is shown in table 6-3.

Table 6-3 Statistic information of the inverter

Statistic item Content


Total running time, total power generation quantity, total amount saved, total CO2 reduced

Today’s statistics Power generated today, peak power, amount saved, CO2 reduced

6.4.4 Parameter setup

Press “ ” or “ ” in the main menu to select “parameter setup”, then press “ENT” key to enter

“setup parameter”, as shown in fig 6.7.

48


Set address

Set password

S e t u p m e n u

Set time

Set language

Set currency Set mode

Fig 6.7 Statistic information

“Setup menu” can realize parameter setup shown in table 6-4.

A view of All LCD menus:

49

Three-phase photovoltaic grid-connected inverter Display operation panel p

！ Alarm h

InputV 1 : 0. 0 V

Input I 1 : 0. 0 A

Input V 2 : 0. 0 V

02 . A 001 Menu

Setup menu

Set address Set time

Set password

Set currency

Set language

Set country

Main menu


Historical record

Parameter setup

System information

Statistic information Current fault


Power generated today: 0 Wh

Saved today: € 0. 00

Input power: 0. 00 kW

Historical record 0

2012/ 01 /05 11:32:16

A 005:AC under-frequency

Set RS485 address

001 1

User password

0000

Currency:

Set currency unit price

AUD

Unit price: 0 . 08 $A /kWh

Set date/time

Date : 2014 / 10 / 27

Time : 12 : 14 : 30

Current language : Chinese

Chinese Dutch

English

Germany

Statistic menu


Statistic today

Setup menu

Set address

Set password

Set currency

Set time

Set language

Set mode

System information

Product model Certification area

Product serial no.

Grid-tied parameter

Software ver.

2 : A001

3 :

Fault information

AC underfrequency

Input undervoltage

ON/OFF

Control menu

Restore setup

Clear information

Reset restart

Germany

English

Austrilia

Greece

Danmark

Netherlands

Set mode : Independent

Independent

Parallel connection

Power limit mode

Set power

Power amplitude

Power factor

Individualized setup

MPPT start voltage

Grid-connected parameter

Undervoltage protection Overvoltage protection

Undervoltage time

Overvoltage protection

Overvoltage time

Under-frequency protection

50


System information

Product model

Product serial no.

Software ver.

Certification area

Grid-tied parameter

ON/OFF

Control menu

Restore setup

Clear information

Reset restart

Product model iMars BG5KTL ON

OFF

ON/OFF control

Product serial no.

BGTL 100 - 00

Clear all records : Confirm ？

System ver.

Ver. 1

Ver. 2

MCU version

: V 1 . 05

: V 1 . 05

: V 1 . 05

Current certification area

AS 4777

Reset restart

Press ENT key to confirm

Press ESC key to cancel

Restore to default setup

Press ENT key to confirm

Press ESC key to cancel


Under-voltage protection Undervoltage time

Undervoltage time

Overvoltage protection


Under-frequency time

Table 5-4 Inverter parameter setup

Item LCD display

Set RS485 address

0 0 1

Set address

Set RS485 address

0 01

AC undervoltage protection time

200ms

Instruction

Press “ENT” key under “set RS485 address” interface, and the cursor will flicker, then press “ ” or “ ” to edit the data of the bit where cursor resides, after editing, press ENT key and the cursor jumps to next bit. When the cursor is in the 3 rd

bit and edition is done, press

“ENT” key to complete inverter RS485 address setup. Press “ESC” key to return.

51



Set password

Set currency

Set time

User password

0 0 0 0

User password

Set the unit price of the currency

Currency: EUR

Unit price: 00.50

€ /1kWh

Set the unit price of the currency

Unit price: 00.50

€

/1kWh

Set date/time

Date: 2012/01/15

Time: 12:14:30

Set date/time

Time: 12:14:30

Instruction

Press “ENT” key under “user password” interface, and the cursor will flicker, then press “ ” or “ ” to edit the data of the bit where cursor resides, after editing, press ENT key and the cursor jumps to next bit. When the cursor is in the 4 th

bit and edition is done, press “ENT” key to complete user password setup. Press

“ESC” key to return.

The default password is “0000”, users can enter “setup menu” without password; when user password is not

“0000”, it requires password for verification when entering “setup menu”.

Press “ENT” key under “set currency unit price” interface to edit the currency and grid-connected electricity price. The currency includes EUR, POD, CNY and

USD.

When the cursor flickers at “currency” row, press “ ” or “ ” key can switch the currency; press “ENT” again to jump to

“unit price” row and edit the unit price.

After editing, press “ENT” to save the setting. Press “ESC” key to return.

Press “ENT” key under “set date/time” interface to enter edit state, the data of the bit where cursor resides can be edited via “ ” or “ ” key, after editing, press

ENT key to jump to the next bit, then press “ENT” key to save the setup. Press

“ESC” to return.

52



Set language

Set country

Current language: Chinese

English Dutch

Chinese

Germany

Current country

Germany

English

Austrilia

: Austrilia

Greece

Danmark

Holland

Instruction

Under “current language” interface, press

“ ” or “ ” key to select the language to be displayed, then press “ENT” key to save the setup. Press “ESC” key to return.

The default language is English. Enter

“menu” in the main interface, then select

“setup” in “Main Menu”, select

“Language” to set the LCD language.

Press “ ” or “ ” key under “current country” interface to select the country to be displayed, then press “ENT” key to save the setup. Press “ESC” key to return.

Set mode

Set mode: Independent

Independent

Parallel connection

DC input mode is divided into

“independent” and “parallel”:

“independent” is to carry out independent max power tracking on Track A and Track

B PV string; “Parallel mode” is to carry out synchronous max power tracking on

Track A and Track B PV string.

The default DC input mode of 3-phase PV gridconnected inverter is “independent mode”.

The menu option of input mode is invisible under inverter grid-connected running state; power on only at DC, when

AC is disconnected, mode selection and setup operation can be performed.

Under “setup mode” interface, press “ ” or “ ” key to select the mode to be set, press “ENT” key to save the setup. Press

“ESC” key to return.

When the situation described in section

5.4.8 occurred, it is necessary to switch from DC input mode to “parallel” mode.

53


Item LCD display Instruction

Input password

0000

Set power

Set power

Power limit mode

Power amplitude

Power factor

Power limit mode: Invalid

Invalid

Automatic

Manual

Power amplitude

100%

Power factor

Grid-connected mode

Common mode

Power factor value: 1.00

When entering “setup power” interface, password authorization is required, this can be acquired from the supplier. This menu is divided into three sub-menus: ①

Power limit mode: invalid mode (namely power limit function is invalid); automatic mode (specific for single-phase machine); manual mode (set the output power amplitude manually); ② Power amplitude: this function is effective only when power limit mode is manual, the percentage ratio is that of the rated power, the setting range is 10% –100%;

③ Power factor: Divided into common mode (default is 1), current lead, and current lag mode, setting range is 0.9

–

0.99 (3-phase machine currently carries

③ Power factor function only)

Input password

0000

Individualize d setup

Individualized setup

MPPT start voltage

120V

MPPT voltage

This function is effective on single-phase machine. When entering “individualized setup” interface, password authorization is required, this can be acquired from the supplier. The sub-menu of this menu is

“MPPT start voltage” menu, which can set the start voltage of MPPT mode, the setup is 120V –160V

54


Item LCD display Instruction

Input password

0000

Set protection point parameter

Undervoltage protection Overvoltage time

Undervoltage time Under-frequency protection

Overvoltage protection Under-frequency time

Undervoltage protection (phase voltage)

184V

0.20s

Undervoltage time

Overvoltage protection (phase voltage)

263V

0.20s

Overvoltage time

47.6Hz


0.20s

Under-frequency time

51.4Hz

Over-frequency protection

0.20s

Over-frequency time

When entering “individualized setup” interface, password authorization is required, this can be acquired from the supplier . When entering corresponding sub menus, users can set the over/undervoltage, over/under-frequency protection point and the protection time.

Press “ ” and “ ” to change the value, press “ENT” key to confirm.

55


Item Instruction LCD display

Input password

0000

Set protection point parameter *


Undervoltage protection 1 Overvoltage time 1

Undervoltage time 1 Under-frequency protection 1

Overvoltage protection 1 Under-frequency time 1

AC undervoltage protection point (phase voltage)

115V

AC undervoltage protection point time

00.04s

AC overvoltage protection point (phase voltage)

309V

AC overvoltage protection point time

00.02s

AC under-frequency protection point

47.99Hz

AC under-frequency protection point time

00.12s

AC over-frequency protection point

50.5Hz

AC over-frequency protection point time

00.12s

AC under-frequency protection point (phase voltage)

196V

AC undervoltage protection point time

1.90s

AC undervoltage protection point (phase voltage)

252V

AC overvoltage protection point time

01.90s

AC under-frequency protection point

49.49Hz

AC under-frequency protection point time

595s

AC over-frequency protection point

50.2Hz

AC over-frequency protection point time

115s

060s

Grid-connected restart time

Close

Open

Islanding protection/open

There are two protection points under

G83/G59 (Britain), CQC (China) and PEA

(Thailand), while for other grid-connected standards, there is only one protection point.

Entering corresponding sub menus to set the over/undervoltage, over/under-frequency protection point and the protection time, press “ ” and

“ ” to change the value. Press “ENT” key to confirm.

Generally, over/undervoltage protection and under-frequency protection require users to modify the value of undervoltage protection 2 and under-frequency protection 2. Over-frequency protection requires a comprehensive setup of over-frequency protection 1 and over-frequency protection 2.

56


6.4.5 System information

Press “ ” or “ ” key to select “system information”, then press “ENT” key to enter “system information” sub-menu, as shown in fig 6.8.

System information


Product serial no.

Grid-tied parameter

Software ver.

Fig 6.8 System information

In “statistic menu”, users can check “product model”, “product serial no.”, “software version” and

“certification area”. Select “software version” to view “version 1”, “version”, “MCU software version” and RS 485 protocol information of the inverter in “system version”, as shown in fig 6.9.

System version

Version1 : V1.05

Version 2 : V1.05

MCU software version : V1.05

Fig 6.9 System version

6.4.6 Present fault

Select “present fault” in the main menu via “ ” or “ ” key, then press “ENT” key to enter “fault information” sub menu, as shown in fig 6.10.

Fault information

2: A001 Input under-voltage

3 :

Fig 6.10 Fault information

User can press

“ ” or “ ” key in the “fault information” interface to view the fault records. “Fault information” records the latest 8 pieces of fault information of the inverter, as shown in fig 6.10.

When there is no fault currently, it will display “No fault!”. See chapter 6.4.2 for more information on fault records or fault time.

6.4.7 Inverter control

Press “ ” or “ ” key in the main menu to select “control”, then press “ENT” to enter the submenu of “control menu”, as shown in fig 6.11.

57


Control menu

ON/OFF

Clear information

Reset restart

Restore setup

Fig 6.11 Control menu

The “control menu” can control the inverter operation, as shown in table 6-5

Table 6-5 Inverter control


ON/OFF

Reset restart

Clear information

Restore setup

O N

O F F

ON/OFF control

Reset restart

Press ENT key to confirm.

Press ESC key to cancel.

Clear all records: confirm?



Restore to default value



Instruction

Control the ON/OFF of the inverter via keypad.

Press “ ” or “ ” key in “ON/OFF control” interface to select ON or OFF operation, press “ENT” to confirm. Press

“ESC” key to cancel and return.

Restart the inverter via keypad, reserve all the setups of the inverter and the historical records of operation.

Press “ENT” key in “reset restart” key to restart the inverter and return, the inverter starts self-inspection; pre ss “ESC” key to quit and return.

Press “ENT” key in “clear all records” interface to clear all records, press “ESC” key to cancel and return.

“Clear information” is to clear all the set parameters of the inverter and restore to default settings, while the historical records of inverter operations will be maintained.

“Restore setup” is to clear all the set parameters of the inverter, and meanwhile, clear all the contents in

“historical records”, and restore to the default setting.

Press “ENT” key to confirm; press “ESC” key to quit and return.

58


6.4.8 Mode setup

The default DC input mode of three-phase PV grid-connected inverter is “independent mode”. If fig

6.12 appeared (namely PV string is re-connected to the inverter after passing through combiner box), it is necessary to switch the DC input mode to “parallel” mode.

The inverter with single-channel input has no input mode setup function; the inverter with dual-channel inputs has input mode setup function. See section 6.4.4 for the way to set the input mode.

Fig 6.12 “Parallel” input mode

6.5 Selection of grid certification standard

After power up the inverter or restore to default setup for the first time, LCD will display a country list for users to select the country, as shown below:

Country: Unset

Germany Greece

UK

Australia

Denmark

Holland

Country: Unset

Greece

Denmark

Holland

China

Thailand

Other

Press “ ” or “ ” key to select country (see table below), press ENT key to finish setup. After setting the country, use the inverter according to the requirements in this manual.

Reference table: Countries and grid standards:

No.

1

2

3

4

Country

Germany

UK

Australia

Greece

Grid standard

VDE0126& AR-N4105

G83/G59

AS4777

VDE0126

Remark

59


No.

5

6

7

Country

Denmark

Holland

China

Grid standard

TF3.2.1

C10/C11

CQC

Remark

8 Thailand PEA

9 Other VDE0126

Users can change the country by the following means: LCD: Menu —>Main menu—>Set menu —>Set country p

！ Alarm h

Input V 1 : 000 . 0 V

Input I 1 : 000 . 0 A

Input V2 : 000. 0 V

02 . A001 Menu

Main menu

Monitoring parameter Parameter setup

Historical record

Statistic information

System information

Current fault

Set address

Set password

Set currency

Set menu

Set time

Set language

Set country

Current country:

Germany

Britain

Austrilia

China

Greece

Denmark

Holland

Users can check the grid standard by the following means:

LCD: Menu —>Main menu: System information—>System information: Certification area —>Certification area

System information


Product serial no.

Grid-tied parameter

Software version

Certification area

AS 4777

60

Three-phase photovoltaic grid-connected inverter Monitoring communication

7 Monitoring communication

This chapter mainly introduces the communication connection of inverter and monitoring system

(eg industrial control master, PC, smart phone).

61


7.1 Standard communication

The standard communication mode for three-phase PV grid-connected inverter is RS485, and there are two c ommunication interfaces which are “RS485” and “EXT”. These two communication interfaces can be used in the communication with PC and smart phone to achieve monitoring of the inverter. The monitoring system solution is shown in fig 7.1.

Fig 7.1 Inverter monitoring system

Table 7-1 Instruction for communication connector interfaces

Pin of inverter communication connector

1(Red)

2(Orange)

3(Brown)

4(Black)

Pin definition

+5VDC

A(RS485+)

B(RS485-)

GND

62


RS485

1 4

2 3

1 4

2 3

EXT

4 3 2 black brown oran ge

1 red

Fig 7.2 Inverter 485 interface diagram Fig 7.3 Standard communication connector

How to connect standard RS485 communication monitoring to the inverter:

(1) Connect the communication connector configured for the inverter to the RS485 terminal of the inverter, as shown in fig 7.4;

(2) Connect the outgoing wire of the communication connector to the user device correctly

Fig 7.4 Connect communication cable to the inverter

(3) Please download the monitoring software “iMars WinExpert” and its operation instruction.

7.2 Optional communication

The optional communication modes supported by PV grid-connected inverter are Ethernet, Wifi and GPRS. The optional communication modes must adopt the accessories shown in table 7-2.

Output all the running parameters of the inverter to the communication accessories via interface

“RS485/EXT”, and finally, connect to the upper computer monitoring system in standard Ethernet,

Wifi and GPRS signal, as shown in fig 7.1.

63


Table 7-2 Communication accessories

Communication accessories

Ethernet converter

WiFi converter

GPRS module

Inverter interface

RS485/EXT

RS485/EXT

RS485/EXT

Upper computer interface

RJ45 plug

Wireless WiFi signal

Visit www.invt-solar.com

to obtain the connection mode of communication accessories and inverter, user manual and the debugging tools.

Note: Communication accessories are not standard configuration and should be purchased separately.

64

Three-phase photovoltaic grid-connected inverter Fault isolation

8 Fault isolation

This chapter mainly describes fault alarms and fault codes for figuring out the inverter fault quickly.

65


Table 8-1 Inverter fault code

Fault code Prompt in English

A

Instruction Fault analysis

A001 Input UV

A002 Bus UV

A003 Grid UV

A004 Grid OV

A005 Grid UF

A006

A007

A009

A011

Grid OF

Clock Fail

Cmd Shut

Grid Loss

Input undervoltage

Bus undervoltage

AC undervoltage

DC input PV1undervoltage

DC input PV2undervoltage

DC input

Public grid voltage is too low

AC overvoltage Public grid voltage is too high

AC under-frequency Public grid frequency is too low

AC over-frequency Public grid frequency is too high

Clock error

Manual turn-off

Grid loss

Inverter clock setup error

Stop the inverter via manual operation on keypad or upper PC

Check whether inverter AC wiring is good

E

E001 Input OV

E003 Bus OV

E004 Boost Fail

E005 Grid OC

E006 OTP

E007

E008

E009

E010

E011

E012

E013

E014

Riso Low

IGBT drv

IntComm

ILeek Fail

Relay Fault

Fan Fail

Eeprom

Dc inject

Input overvoltage

Bus overvoltage

DC input overvoltage

Inverter internal bus overvoltage

Boost fault

AC overcurrent

Inverter boost circuit fault

Inverter internal AC output overcurrent

Overheat Inverter internal temperature is too high

Insulation impedance is The system insulation impedance of too low inverter external interface is too low

IGBT drive protection Inverter IGBT drive protection

Internal communication Master/slave DSP cannot communicate error Master/slave DSP data check error

Current leakage is too System or inverter current leakage is large too large

Relay fault

Fan fault

Inverter internal relay fault

Inverter internal fan fault

Memory abnormal Inverter internal memory fault

The DC component in The DC component in AC output is too

66


Fault code Prompt in English Instruction

AC is too large

E015 OutputShort

E018 Input OC

E019

E020

Incnst

PowerReversed

Output short circuit

Input overcurrent large

Fault analysis

AC output short circuit fault

DC input overcurrent

Master/slave controller grid voltage,

Data consistency fault frequency, current leakage or the sampling of AC DC component is inconsistent

DC power reversal DC power reversal

67


If any problem, please contact with the supplier and provide following information:

 Model of the inverter: ;

 Serial No. of the inverter: ;

 System version:

—— version 1: ;

—— version 2: ;

—— MCU software version: ;

 Fault code: ;

 Fault description

68

Three-phase photovoltaic grid-connected inverter Contact us

9 Contact us

China·Shenzhen

INVT Solar Technology (Shenzhen) Co., Ltd.

Address: 7# Building, Gaofa Industrial Park, Longjing, Nanshan district, Shenzhen

Service hotline: +86 400 700 999

E-mail: [email protected]

INVT group website: www.invt.com

INVT solar website: www.invt-solar.com

69

Three-phase photovoltaic grid-connected inverter Appendix

10 Appendix

Table 9-1Technical parameters of three-phase PV grid-connected inverter

DC

Model

Max DC voltage (V)

Starting voltage (V)

MPPTvoltage range(V)

DC input voltage range during rated power (V)

MPPT number/number of connectable strings per group

Max DC power (W)

Max input current (A)× MPPT number

Isc PV

Max inverter backfeed current to the array

DC switch

Max output power (W)

Grid voltage, frequency range (V)

40kW

1100

200

1/8

55000

74x1

81

50kW

1100

200

60kW

Three-phase

70kW

1100

200

570~1000

1100

200

1/10

66000

90x1

99

600~850

72000

0A

1/14

120x1

132

70kW-HV

1100

200

78000

40000

63.5

Optional

66000 50000

72.5

60000

310-480Vac,50Hz(47~51.5Hz)

96 96

1050A @ 4.76ms

70000

384~552Vac,50H z(47~51.5Hz)

96

AC

System

Others

Max AC output current (A)

Maximum output fault current

Maximum backfeed current to array

Maximum output overcurrent protection(A)

Power factor

Harmonic wave distortion

Cooling mode

Max efficiency

Euro efficiency

MPPT efficiency

Protection level

Power consumption at nighttime

Protective class

Overvoltage category inverter topology

Pollution degree

Ambient temperature

RH

Max altitude (m)

Display

System language

Communication mode

DC terminal

Noise dB(A)

Installation mode

Grid standard

Safe certificate / EMC category

125.7 143.5 190

Less than 200 A

190 190

50kW-HV

1100

200

620~1000

700~850

2/5

6600

42x2

50.4*2

50000

484~594Vac,50Hz

(47~51.5Hz)

53

104.9

-0.8~+0.8 (adjustable)

< 3% (at rated power)

Air cooling

98.60%

98.20%

99.90%

IP65

< 1W

I

AC:III,PV:II

Non-isolated

3

(-25 ℃ ~+60 ℃ ) ， auto derating is required if the ambient temperature exceeds 45°C

4~100%,condensation

≤2000, derating is required if the altitude exceeds 2000m

3.5’ LCD display, support backlight display

English, Chinese, Germany, Dutch

RS485 (standard); Ethernet, WiFi (optional)

BC03A/ BC03B

≤55

Wall installation

DIN VDE 0126-1-1 ： 2013 ， VDE-AR-N 4105 ： 2011 ， DIN VDE V 0124-100 ： 2012 ， IEC 61727 （ IEC62116 ），

AS/NZS 4777.2

： 2015 ， NB/T32004-2013 ， IEC 60068-2-1 ： 2007 ， IEC 60068-2-2 ： 2007 ， IEC 60068-2-14 ：

2009 ， IEC 60068-2-30 ： 2005 ， IEC 61683 ： 1999 ， C10/11 ： 2012

IEC 62109-1 ： 2010 ， IEC 62109-2 ： 2011 ， EN 61000-6-2: 2005 / EN 61000-6-3:2007/A1:2011

Protection function

Input overvoltage protection, input overcurrent protection, DC insulation monitoring, DC monitoring, grounding fault current monitoring, grid monitoring, islanding protection, short-circuit protection and overheat protection, etc.

70

INVT Photovoltaic Grid-connected Inverter Operation Manual

Operation Manual

Photovoltaic Grid-connected Inverter

INVT Solar Technology (Shenzhen) Co., Ltd.

Preface

Content

1 Safety precautions

1.1 Warning marks

Note: Technical personnel who can perform installation, wiring, commissioning, maintenance, troubleshooting and replacement of the iMars series grid-tied solar inverters must meet the following requirements:

1.2 Safety guidance

2 Product overview

2.1 PV grid-connected power generation system

2.2 Product appearance

2.3 Nameplate

1

Trademark and product type

2

Model and important technical parameters

3

Certification system of the inverter confirming

4

Serial number, company name and country of origin

2.4 Product model

2.5 Outline dimension and weight

3 Storage

4 Installation

4.1 Unpacking confirmation

4.2 Preparation before installation

4.3 Mechanical installation

4.4 Electrical connection

Plan 1: Use PG head

PV+wiring diagram

PV-wiring diagram

Plan 2: Use straightly-inserted terminal

5 Running

5.1 Inspection before running

5.2 Inverter grid-connected running

It is a must to select the country to set grid-connected standard during the initial operation of the inverter, see details at section 6.5.

5.3 Inverter stop

5.4 Daily maintenance and inspection

The operation steps of the BG40-70KTR and BG70KTR-HV are as follows:

The operation steps of the BG50KTR-HV are as follows:

6 Display operation panel

6.1 LED state indicator

6.2 Operation keypad

6.3 LCD panel

6.4 Function operation

6.5 Selection of grid certification standard

7 Monitoring communication

7.1 Standard communication

7.2 Optional communication

8 Fault isolation

9 Contact us

China·Shenzhen

10 Appendix

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