Xantrex™ GT250 E 250 kW
Grid-Tied Photovoltaic Inverter
Planning and Installation Manual
www.schneider-electric.com
Xantrex GT250 E 250 kW
Grid-Tied Photovoltaic Inverter
Planning and Installation Manual
www.schneider-electric.com
Copyright and Contact
Trademarks
Schneider Electric, the Schneider Electric logo, and Xantrex are trademarks or registered trademarks of the
Schneider Electric group of companies. Other trademarks, registered trademarks, and product names are the
property of their respective owners and are used herein for identification purposes only.
Notice of Copyright
Copyright © 2008, 2009, 2010 Xantrex Technology Inc. All rights reserved. No part of this document may be
reproduced in any form or disclosed to third parties without the express written consent of:
Xantrex Technology Inc.
161-G South Vasco Road
Livermore, California USA 94551
Xantrex Technology Inc. reserves the right to revise this document and to periodically make changes to the
content hereof without obligation or organization of such revisions or changes unless required to do so by prior
arrangement.
Exclusion for Documentation
UNLESS SPECIFICALLY AGREED TO IN WRITING, XANTREX TECHNOLOGY INC. (“XANTREX”)
(A) MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY OR SUITABILITY OF ANY TECHNICAL OR OTHER INFORMATION
PROVIDED IN ITS MANUALS OR OTHER DOCUMENTATION;
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CONTAINED WITH THE ENGLISH LANGUAGE VERSION WHICH IS POSTED AT WWW.SCHNEIDER-ELECTRIC.COM.
Date and Revision
March 2010 Revision B
Part Number
152936
Contact Information
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About This Manual
Purpose
The purpose of this Planning and Installation Manual is to provide explanations
and procedures for planning and installing the Schneider Electric Xantrex GT250
E 250 kW Grid-Tied Photovoltaic Inverter.
Scope
The Manual provides safety guidelines, detailed planning and setup information,
and procedures for installing the inverter.
Audience
The Manual is intended for use by anyone who plans to construct or install a
system involving the Xantrex GT250 E 250 kW Grid-Tied Photovoltaic Inverter.
Installers must meet all local and state code requirements for licensing and
training for the installation of Electrical Power Systems with AC and DC voltage to
1000 volts.
Organization
This Manual is organized into four chapters:
Chapter 1, “Introduction” provides information about the features and functions
of the Xantrex GT250 E 250 kW Grid-Tied Photovoltaic Inverter.
Chapter 2, “Planning” provides information to help plan the installation of the
Xantrex GT250 E 250 kW Grid-Tied Photovoltaic Inverter.
Chapter 3, “Installation” describes the procedures needed to install the Xantrex
GT250 E 250 kW Grid-Tied Photovoltaic Inverter. This section includes unpacking
and moving instructions, mounting instructions, and cabling instructions.
Chapter 4, “Verification” provides a checklist to ensure the installation of the
Xantrex GT250 E is correct and complete.
iii
This manual is for use by qualified personnel only.
About This Manual
Conventions Used
The following conventions are used in this guide.
WARNING
Warnings identify conditions or practices that could result in personal injury or
loss of life.
CAUTION
Cautions identify conditions or practices that could result in damage to the unit or
other equipment.
Important: These notes describe things which are important for you to know, but
not as serious as a caution or warning.
Abbreviations and Acronyms
ANSI
American National Standards Institute
CCU2
Converter Control Unit 2
CFM
Cubic Feet per Minute
CW
Clockwise
DSP
Digital Signal Processor
FPGA
Field Programmable Gate Array
GUI
Graphical User Interface
IEEE
Institute of Electrical and Electronics Engineers
IGBT
Insulated Gate Bipolar Transistor
IPM
Intelligent Power Module
kcmil
1000 circular mils
LCD
Liquid Crystal Display
NFPA
National Fire Protection Association
PBX
Private Branch Exchange
PSL
Phase-Shift Loop
PV
Photovoltaic
UFCU
Universal Frontpanel Control Unit
Related Information
You can find more information about Schneider Electric as well as its products
and services at www.schneider-electric.com.
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Important Safety Instructions
SAVE THESE INSTRUCTIONS - DO NOT
DISCARD
This manual contains important safety instructions for the Xantrex GT250 E 250
kW Grid-Tied Photovoltaic Inverter (Xantrex GT250 E) that shall be followed
during installation and maintenance procedures.
WARNING: Shock Hazard
Read and keep this Planning and Installation Manual for future reference. Before
installing Xantrex GT250 E read all instructions, cautionary markings, and all
other appropriate sections of this manual. Failure to adhere to these warnings
could result in severe shock or possible death. Exercise extreme caution at all
times to prevent accidents.
WARNING: Shock Hazard
The Xantrex GT250 E Enclosures contain exposed high-voltage conductors. The
Enclosure doors should remain closed with the latches tightened, except during
installation, maintenance or testing. These servicing instructions are for use by
qualified personnel who meet all code requirements for licensing and training for
the installation of Electrical Power Systems with AC and DC voltage to 1000 volts.
To reduce the risk of electric shock, do not perform any servicing other than that
specified in the installation instructions unless you are qualified to do so. Do not
open the cabinet doors if extreme moisture is present (rain or heavy dew).
WARNING: Lethal Voltage
In order to remove all sources of voltage from the Xantrex GT250 E, the incoming
power must be de-energized at the source. This may be done at the main utility
circuit breaker and by opening the AC Disconnect and the DC Disconnect
Switches on the Xantrex GT250 E. Review the system configuration to determine
all of the possible sources of energy. In addition, allow 20 minutes for the DC bus
capacitors, located within the cabinet, to discharge after removing power.
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This manual is for use by qualified personnel only.
Safety
Risks
WARNING: Shock hazard
Parts of the condenser charge will still be energized for a maximum of 20 minutes
after being disconnected.
Open device cover plates or doors only after the device is disconnected and
discharged. Check whether the device is no longer live (DC voltage) including
terminals PV+ and PV-.
WARNING: Explosion hazard
The IGBT module may explode in the event of a major malfunction.
Do not operate larger devices while the pivoting part is opened.
WARNING: Crush hazard
The inverters have a very high balance point and can easily topple down. Only
move while exercising care. Pay attention to the balance point sticker during
transport.
WARNING: Amputation hazard
The inverters contain integrated ventilators including rotating ventilator wheels.
Do not place fingers in ventilator.
WARNING: Burn hazard
Inverters contain components that become hot during normal operation. Do not
touch.
CAUTION
The inverters have a supply air and exhaust air area, which must remain
unobstructed. The device can overheat and be destroyed if the installation signs
are not adhered to.
Disassemble the tracks required for transportation located at the top for
operating the cabinet devices.
CAUTION
Inverter electronics can be destroyed when touched and when electrostatically
charged. Discharge via earth potential before touching and wear appropriate
protective gear.
CAUTION
No connections or disconnections are allowed at the terminal strips or internal
connectors during operation.
Turn device off before performing terminal work; wait 5 to 20 minutes (condenser
charge) and recheck to ensure device is no longer live.
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Safety
General Safety Precautions
1. When installing the Xantrex GT250 E use only components recommended or
sold by the manufacturer. Doing otherwise may result in a risk of fire, electric
shock, injury to persons, and will void the warranty.
2. Do not attempt to operate the Xantrex GT250 E if it has been dropped, or
received more than cosmetic damage during transport or shipping. If the
Xantrex GT250 E is damaged, or suspected to be damaged, see the
Warranty for this unit in the Xantrex GT250 E Operation and Maintenance
Manual.
3. To reduce the risk of electrical shock, lock-out and tag the Xantrex GT250 E
before attempting any maintenance, service, or cleaning.
Personal Safety
Follow these instructions to ensure your safety while working with the Xantrex
GT250 E.
Qualified Personnel
Only qualified personnel should perform the transportation, installation and initial
operation and maintenance of the Xantrex GT250 E (IEC 364 or CENELEC
HD 384 or DIN VDE 0100 and IEC 664 or DIN VDE 0110). Follow all national
accident prevention regulations.
Qualified personnel, within the meaning of these basic safety regulations, will be
people who are familiar with the installation, assembly, start-up and operation of
the Xantrex GT250 E and have the appropriate qualifications with respect to their
functions.
Safety Equipment
Authorized service personnel must be equipped with standard safety equipment
including the following:
•
Safety glasses
•
Ear protection
•
Steel-toed safety boots
•
Safety hard hats
•
Padlocks and tags
•
Appropriate meter to verify that the circuits are de-energized
(1000 Vac and DC rated, minimum)
Check local safety regulations for other requirements.
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This manual is for use by qualified personnel only.
Safety
Wiring Requirements
1. All wiring methods and materials shall be in accordance with the National
Electrical Code ANSI/NFPA 70, European Requirements, as well as all state
and local code requirements (for example, DIN / VDE).
2. The Xantrex GT250 E has a three-phase output.
3. The AC power conductor wiring interfacing with the AC terminals in the AC
Interface Enclosure (-H0) are located at L1, L2, L3. These terminals requires
the use of a crimp-on type ring terminal or compression-type lug. Keep these
cables together as much as possible and ensure that all cables pass through
the same knockout and conduit fittings, allowing any inductive currents to
cancel. For torque values, see Table A-5 on page A–5. See Figure 3-8 on
page 3–9 for the location of these terminals.
4. The AC neutral conductor from the transformer is terminated in the AC
Interface Enclosure (-H0) at the Copper Ground Bar. This terminal requires
the use of a crimp-on type ring terminal or compression-type lug. For torque
values, see Table A-5 on page A–5. See Figure 3-8 on page 3–9 for the
location of these terminals.
5. The AC Control Voltage wiring interfacing with the Control Voltage terminals
in the AC Interface Enclosure are located at -X2 L1, L2 and PE. For torque
values, see Table A-5 on page A–5. See Figure 3-8 on page 3–9 for the
location of these terminals.
6. The DC power conductor wiring interfacing with the DC terminals is
terminated in the DC Interface Enclosure (-H2). These terminals requires the
use of a crimp-on type ring terminal or compression-type lug. Keep these
cables together as much as possible and ensure that all cables pass through
the same knockout and conduit fittings, allowing any inductive currents to
cancel. For torque values, see Table A-6 on page A–5. See Figure 3-9 on
page 3–11 for the location of these terminals.
7. This product is intended to be installed as part of a permanently grounded
electrical system as per the National Electric Code ANSI/NFPA70 and EU
requirements, as well as all state and local code requirements (for example,
DIN/VDE). A copper ground rod must be installed within 3 ft. (1 m) of the
Xantrex GT250 E Enclosure. This is the single point earth ground for the
inverter system. The single point ground for the system is to be made at the
ground bus bar in the AC Interface Enclosure.
8. The equipment grounds on the Xantrex GT250 E are marked with PE.
9. AC overcurrent protection for the utility interconnect (Grid-tie) must be
provided by the installers as part of the Xantrex GT250 E installation.
CAUTION: Fire Hazard
In accordance with the National Electrical Code, ANSI/NFPA 70, connect only to
a circuit
provided with 1200 amperes maximum branch circuit overcurrent protection.
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Safety
Operational Safety Procedures
Never work alone when servicing this equipment. A team of two is required until
the equipment is properly de-energized, locked-out and tagged, and verified deenergized with a meter.
Thoroughly inspect the equipment prior to energizing. Verify that no tools or
equipment have inadvertently been left behind.
Lockout and Tag
Safety requirements mandate that this equipment not be serviced while
energized. Power sources for the Xantrex GT250 E must be locked-out and
tagged prior to servicing. A padlock and tag should be installed on each energy
source prior to servicing.
WARNING: Shock Hazard
Review the system schematic for the installation to verify that all available energy
sources are de-energized. DC bus voltage may also be present. Be sure to wait
the full 20 minutes to allow the capacitors to discharge completely. Schematics
are located inside the front door of the unit.
The Xantrex GT250 E can be energized from both the AC source and the DC
source. To ensure that the inverter is de-energized prior to servicing, lockout
and tag the Xantrex GT250 E using the following procedure.
1. Open, lockout, and tag the incoming power at the utility main circuit breaker.
2. Open, lockout, and tag the AC Disconnect Switch (-Q1) on the AC Interface
Enclosure (-H0). See Figure 1-4 on page 1–6 for the location of the AC
Disconnect Switch.
3. Open, lockout, and tag the DC Disconnect Switch (-Q11) on the DC Interface
Enclosure (-H2). See Figure 1-4 on page 1–6 for the location of the DC
Disconnect Switch.
4. Using a confirmed, accurate meter, verify all power to the inverter is deenergized. A confirmed, accurate meter must be verified on a known voltage
before use. Ensure that all incoming energy sources are de-energized by
checking the following locations.
a) AC Utility Terminals: (Bottom of L1, L2, L3 and PE)
See Figure 3-9 on page 3–11 and Figure 3-10 on page 3–11 for the
location of these terminals.
b) PV Terminals: (PV+ and PV-)
See Figure 3-11 on page 3–12 for the location of these terminals.
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This manual is for use by qualified personnel only.
Safety
De-Energize/Isolation Procedure
The following procedure should be followed to de-energize the Xantrex GT250 E
for maintenance.
WARNING
The terminals of the DC input may be energized if the PV arrays are energized. In
addition, allow 20 minutes for all capacitors within the main Enclosure to
discharge after disconnecting the Xantrex GT250 E from AC and DC sources.
To isolate the Xantrex GT250 E:
1. Turn the ON/OFF switch to the OFF position.
2. Open the DC interface disconnect switch (-Q11).
3. Open the AC interface disconnect switch (-Q1).
4. Open the utility connection circuit breaker.
5. Install lockout devices on the utility connection circuit breaker, AC and DC
disconnect switch.
Interconnection Standards Compliance
The Xantrex GT250 E complies with the German grid protection requirements of
VDEW and the Spanish RD 1663/2000.
The Xantrex GT250 E is designed to meet UL 1741 Static Inverters And Charge
Controllers For Use In Photovoltaic Power Systems, as well as IEEE 519.
Refer to both documents for details of these recommendations and test
procedures.
Intended Use
The Xantrex GT250 E may only be used in connection with PV modules. It is not
suitable for any other application areas.
An initial operation (e.g. starting the intended operation) will only be allowed
when observing the EMC guideline (89/336/EWG).
The Xantrex GT250 E complies with the 73/23/EWG low voltage directive
requirements. The harmonized standards of the series EN 50178/DIN VDE 0160
in connection with EN 60439-1/DIN VDE 0660 part 500 and EN 60146/DIN VDE
0558 will be used for the inverters.
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Contents
Important Safety Instructions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v
1
Introduction
Description of the Xantrex GT250 E - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–2
Operator Interface Controls - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–3
ON/OFF Switch - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–4
Emergency Stop (E-STOP) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–5
AC and DC Disconnect Switches - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–6
Communication Features and Methods - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–7
System Status and Fault Reporting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–7
Data Logging - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–9
PC Connection Methods - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–9
Direct Access Connection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–10
Remote Access Connection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–10
Optional Equipment - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–11
RS232 Converter Kit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–11
2
Planning
Overview of Xantrex GT250 E Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–2
PV Planning - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–2
Environmental Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–3
Ground Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–3
Communication Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–3
Utility Side Isolation Transformer Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–4
Electrical Diagrams - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–5
Conduit Entry - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–5
Anchoring the Xantrex GT250 E - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–6
3
Installation
Unloading - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–2
Moving the Xantrex GT250 E - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–2
Unpacking the Xantrex GT250 E - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–2
Removing the Pallet and Moving the Xantrex GT250 E - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–3
Moving with a Forklift - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–3
Moving with a Crane - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–4
Mounting and Anchoring the Units - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–5
Opening or Closing Access Doors - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–5
Wiring - General - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–7
Overcurrent Protection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–8
Conductor Termination - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–8
Grounding - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–9
Wiring - Specific - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–10
PV Array Connections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–12
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Contents
Remote Communications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Telephone Line Connections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - PC Connection Methods - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Remote Connection (Standard) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Direct Connection (Serial) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
4
3–13
3–13
3–14
3–14
3–14
Verification
Verification Procedure Summary - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Visual Inspection of Mechanical Connections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Visual Inspection of Electrical Connections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Corrective Action - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
4–2
4–3
4–3
4–3
A Specifications
System Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–2
Environmental Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–2
Electrical Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–3
Regulatory Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–3
Over Voltage, Under Voltage and Frequency Ranges - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–4
Bolt Sizing and Torque Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–5
Dimensions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–6
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Figures
Figure 1-1
Figure 1-2
Figure 1-3
Figure 1-4
Figure 1-5
Figure 1-6
Figure 1-7
Figure 1-8
Figure 2-1
Figure 2-2
Figure 2-3
Figure 3-1
Figure 3-2
Figure 3-3
Figure 3-4
Figure 3-5
Figure 3-6
Figure 3-7
Figure 3-8
Figure 3-9
Figure 3-10
Figure 3-11
Figure 3-12
Figure 3-13
Figure A-1
Xantrex GT250 E Operator Interface Components- - - - - - - - - - - - - - - - - - - - - - - - - - - 1–3
ON/OFF Switch - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–4
Emergency Stop- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–5
AC and DC Disconnect Switches- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–6
LCD Display and UFCU Location- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–8
MultiTech® 56K Modem and RS232/FO Converter - - - - - - - - - - - - - - - - - - - - - - - - - 1–10
Surge Arrester - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–10
RS232/FO Converter Kit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–11
Xantrex GT250 E Electrical Diagram - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–5
Enclosure Conduit Entries, Bottom Side View - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–5
Main Inverter Anchor Bolt Pattern (Not to scale) - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–6
Center of Gravity - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–3
Forklift Lifting Locations - Underneath Unit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–4
Lifting Using a Crane - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–4
Inverter Enclosure Access Doors - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–5
AC Interface Access Door- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–6
DC Interface Access Door - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–6
Single-point Ground; Ground Bar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–9
Chassis Ground Bar (TB1) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–9
AC Terminal Connections from the Utility - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–11
AC Control Voltage Terminal Connections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–11
PV Array Cable Routing and Terminations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–12
Telephone Cable Routing - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–13
RS232/FO Converter Kit Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–15
Xantrex GT250 E Dimensions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–6
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xiv
Tables
Table A-1
Table A-2
Table A-3
Table A-4
Table A-5
Table A-6
Environmental Specifications- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Electrical Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Regulatory Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Over/Under Voltage and Over/Under Frequency Ranges - - - - - - - - - - - - - - - - - - - - AC Terminal Bolt Size, and Torque Values - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - DC Terminal Bolt Size, and Torque Values - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
A–2
A–3
A–3
A–4
A–5
A–5
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xvi
1
Introduction
Chapter 1, “Introduction” provides
information about the features and
functions of the Xantrex GT250 E 250 kW
Grid-Tied Photovoltaic Inverter.
This manual is for use by qualified personnel only.
Introduction
Description of the Xantrex GT250 E
The Xantrex GT250 E 250 kW Grid-Tied Photovoltaic Inverter is a utility
interactive, three-phase power conversion system for grid-connected
photovoltaic arrays with a power rating of 250 kW. Designed to be easy to install
and operate, the Xantrex GT250 E automates start-up, shutdown, and fault
detection scenarios. With user-definable power tracking that matches the inverter
to the array and adjustable delay periods, users are able to customize start up
and shut down sequences. Multiple Xantrex GT250 E inverters are easily
paralleled for larger power installations.
The Xantrex GT250 E power conversion system consists of a pulse-width
modulated (PWM) inverter, switch gear for isolation and protection of the
connected AC and DC power sources. Housed in a rugged IP21 rated,
galvanized steel Enclosure, the Xantrex GT250 E incorporates sophisticated
Intellimod (IPM) Insulated Gate Bipolar Transistors (IGBTs) as the main power
switching devices. An advanced, field-proven, Maximum Peak Power Tracker
(MPPT) integrated within the Xantrex GT250 E control firmware ensures the
optimum power throughput for harvesting energy from the photovoltaic array.
The advanced design of the Xantrex GT250 E includes an EMI output filter and
the main AC contactor located electrically on the inverter side of the isolation
transformer.
Additionally, the Xantrex GT250 E integrated controller contains self-protection
features including over and under voltage and frequency safeguards. An integral
anti-island protection scheme prevents the inverter from feeding power to the
grid in the event of a utility outage. The Xantrex GT250 E includes a local user
interface comprised of an ON/OFF switch, keypad, and 4-line, 80 character LCD
display. A user-friendly, Graphic User Interface (GUI) provides a remote interface
for operator interrogation of Xantrex GT250 E system status, control, metering/
data logging and protective functions within the Xantrex GT250 E. The status,
control, and logging features are also supported by the data modem (included)
and can be accessed remotely.
The Xantrex GT250 E comes in a set of three Enclosures to house the Electronics
described above. The left section is the AC Interface Enclosure (-H0). The center
section is the Main Inverter Enclosure (-H1). The right section is the DC Interface
Enclosure (-H2). The three Enclosures are constructed and delivered as one
complete assembly. These components are identified in Figure 1-1 on page 1–3
and the dimensions are identified in Figure A-1 on page A–6.
1–2
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Operator Interface Controls
Operator Interface Controls
The Xantrex GT250 E comes in a set of 3 enclosures to house the Electronics
described above. The left section is the AC Interface Enclosure (-H0). The center
section is the Inverter Enclosure (-H1). The right section is the DC Interface
Enclosure (-H2). The 3 enclosures are constructed and delivered as one
complete assembly.
Operator interface controls are located on the front door of the main inverter
Enclosure. These controls include an ON/OFF Switch, 4-line LCD display and
keypad called the Universal Frontpanel Control Unit (UFCU). Additionally there is
an AC and DC Disconnect on the AC Interface Enclosure and the DC Interface
Enclosure Doors and an Emergency (E-STOP) push button.
Exhaust
Exhaust
Exhaust
Exhaust
DC Interface
Enclosure
-H2
AC Interface
Enclosure
-H0
LCD Display
Universal
Frontpanel
Control (UFCP)
On/Off
Switch
E-STOP Push
button
AC Disconnect
Switch
DC Disconnect
Switch
Main Inverter Enclosure
-H1
(Front View)
Air Intake
Figure 1-1 Xantrex GT250 E Operator Interface Components
WARNING: Shock Hazard
Before attempting to service the Xantrex GT250 E, follow the de-energize Lockout
and Tag procedure in the Xantrex GT250 E Operation and Maintenance Manual.
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Introduction
ON/OFF Switch
The Xantrex GT250 E incorporates a maintained position ON/OFF switch located
on the right center door, under the main control display. Under normal conditions,
the ON/OFF switch is in the ON position. Turning the switch to the OFF position will
initiate an immediate controlled shutdown of the Xantrex GT250 E and open both
the main AC and DC contactors within the unit. The main AC and DC contactors
cannot be closed unless the switch is in the ON position. The Xantrex GT250 E is
prevented from being restarted until the ON/OFF switch is turned back to the ON
position.
WARNING: Shock Hazard
Turning the ON/OFF switch to the OFF position does NOT remove all hazardous
voltages from inside the inverter. Before attempting to service the Xantrex GT250
E, follow the de-energize Lockout and Tag procedure page ix.
Figure 1-2 ON/OFF Switch
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Operator Interface Controls
Emergency Stop (E-STOP)
The Xantrex GT250 E incorporates a maintained position E-STOP pushbutton
located on the Inverter Enclosure. Under normal conditions, the E-STOP
pushbutton is in the CLOSED (extended) position. Pushing the pushbutton to the
OPEN (depressed) position will initiate an immediate controlled shutdown of the
Xantrex GT250 E and open both the main AC and DC contactors within the unit.
The main AC and DC contactors cannot be closed unless the pushbutton is in
the CLOSED (extended) position. The Xantrex GT250 E is prevented from being
restarted until the E-STOP pushbutton is in the CLOSED (extended) position.
Provisions are supplied for adding a remote emergency stop circuit.
Figure 1-3 Emergency Stop
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Introduction
AC and DC Disconnect Switches
Both AC and DC Interface Enclosure doors are equipped with lockout hasps for
personnel safety. The Enclosure doors should not be opened while the Xantrex
GT250 E is operating.
The switch handles and shafts provide a door interlock for both the AC and DC
interface Enclosures. The doors cannot be opened when the switch is in the ON
position.
The AC and DC Disconnect switches are each equipped with an auxiliary
contact block which enables the switch to be used as a load break disconnect.
In the event that either Disconnect switch is opened while the Xantrex GT250 E is
processing power from the PV array, the early-break contact block will signal the
CCU2 (Converter Control Unit) to stop processing power prior to opening the
Disconnect switch.
Additionally, opening the Disconnect switch will cause the Xantrex GT250 E to
execute an immediate orderly shutdown, open both the main AC and DC
contactors, and report a E-STOP fault on the LCD of the UFCU.
When working on the system, disconnecting only the main control switch on the
AC and DC side is insufficient.
All Xantrex GT250 E Inverter Enclosure doors must be locked during normal
operation.
WARNING: Shock Hazard
Disengaging the Inverter Enclosure door interlock switch does NOT remove all
hazardous voltages from inside the inverter. Before attempting to service the
Xantrex GT250 E, follow the de-energize Lockout and Tag procedure on page ix.
AC Disconnect
Switch
AC Interface Enclosure
DC Disconnect
Switch
DC Interface Enclosure
Figure 1-4 AC and DC Disconnect Switches
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Communication Features and Methods
Communication Features and Methods
The Xantrex GT250 E provides two types of information to the user:
•
system status and/or fault information, and
•
data logging information.
System status and fault information can be accessed using the Universal Front
Panel Control Unit (UFCU) or a personal computer using the Xantrex Solar
Graphic User Interface (GUI) software. Data logging requires the use of a PC
using the GUI software.
The Xantrex GT250 E communicates system status information to the user using
the following methods.
•
The Front Panel Control Unit (UFCU) Display
•
PC Connection (Direct and/or Remote) - Xantrex Solar Graphic User
Interface (GUI) Software required (may require additional hardware)
•
External Analog Monitoring - (Optional) (e.g., Irradiance, PV temp, ambient
temp, wind speed) (requires additional hardware)
System Status and Fault Reporting
Basic system status and all fault conditions rising from within the Xantrex GT250 E
are reported to the UFCU. The unit stores the time and details of all faults in nonvolatile memory. The 4-line LCD will display a hexadecimal value and a brief text
description of the fault.
The fault value is also made available to the Graphic User Interface (GUI). The
GUI has a more extensive description of the fault.
The UFCU keypad is located on the right center door to manipulate and view
system operation and status. The keypad is comprised of 20 touch-sensitive
keys that provide a means to navigate through the menus and alter userchangeable settings.
See the Xantrex GT250 E 250 kW Grid-Tied Photovoltaic Inverter Operation and
Maintenance Manual (Part #: 152937) for details.
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Introduction
LCD Display
Universal Front Panel
Control Unit (UFCU)
Figure 1-5 LCD Display and UFCU Location
This information can also be accessed using a personal computer using the GUI
software either directly or remotely. Alternatively, the fault reporting can be
accomplished using the optional Fax Modem.
Types of status information include:
•
Current Operating State or Goal State
•
Fault Code (if applicable)
•
Inverter State
•
Line Voltage and Current
•
Inverter Matrix Temperature
•
Inverter Power
•
PV State
•
PV Voltage and Current
•
PV Power
•
Grid Frequency
•
Peak Power Tracker Enabled
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Communication Features and Methods
Data Logging
The inverter stores data values and software metrics for debugging. These
values are stored within the CCU2 controller board in non-volatile memory. Data
logging requires the use of a PC connection using the Xantrex Solar Graphic
User Interface (GUI) software.
•
The Data Logging features include:
•
Operational Values
•
Internal Metrics
•
Data Log Acquisition
•
Graphic Data Analysis
•
Fault Log Acquisition
•
Software Upgrade
•
Accumulated Values
•
Configurable Parameters
PC Connection Methods
Personal computers can be used to access the system status and programming
features of the Xantrex GT250 E. This allows monitoring and control of the inverter
from a remote office, a home office, motel room, or any location where a laptop or
desktop computer can make a modem telephone call. Computers can be
connected either directly or remotely. Software is included to provide a graphic
user interface that relates important system information. This software is called
Xantrex Solar Graphic Interface (GUI). See "Computer Communications with the
Xantrex GT250 E" in the Xantrex GT250 E 250 kW Grid-Tied Photovoltaic Inverter
Operation and Maintenance Manual (Part #: 152937) for additional information.
The Enclosure comes with a factory-installed MultiTech® 56K modem and Surge
Arrestor (-F36). The RS232/Fiber optic converter is configured for ethernet use. If
you are planning on using this connection for direct PC access, it will be
necessary to replace the RS232/FO converter (Part #: 1-152059-03) with RS232/
FO converter (Manufacturer p/n: 1-152624-01 KIT, COMM, DIRECT, PC TO CCU).
The GUI can dial up the inverter and receive fault report calls from it through a
standard Hayes-compatible, landline modem. When the GUI initiates a call
through the modem at the GUI computer, the inverter’s modem answers the call
and initiates a 9600 baud serial connection, effectively as if the GUI was
connected directly. Or, if the inverter experiences a fault, it will initiate a call to the
GUI and report the fault details.
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Introduction
RS232/FO Converter
MultiTech® 56K Modem
Figure 1-6 MultiTech® 56K Modem and RS232/FO Converter
-F36 Surge Arrester
Figure 1-7 Surge Arrester
Direct Access Connection
The Xantrex GT250 E can be directly accessed by a computer. This connection
requires using the RS232 Converter kit (Manufacturer p/n: 1-152624-01 KIT,
COMM, DIRECT, PC TO CCU). The kit contains an RS232/FO converter
configured for PC use with an adapter, a DB9/DB25 serial cable and a fiber optic
harness.
Remote Access Connection
The Xantrex GT250 E can be remotely accessed through a telephone
connection. A MultiTech® 56 Kbps data modem is installed in the inverter for
connection to a remote computer. The customer has the ability to control and
monitor the status of the inverter through this connection.
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Optional Equipment
Optional Equipment
The following options are available for purchase for use with the Xantrex GT250 E
to enhance its communications capability. The additional Xantrex GT250 E
options can be field installed. Contact a Schneider Electric distributor for further
information on installation options.
RS232 Converter Kit
RS232 Converter kit (Manufacturer p/n: 1-152624-01 KIT, COMM, DIRECT, PC TO
CCU) contains an RS232/FO converter configured for PC use with an adapter, a
DB9/DB25 serial cable and a fiber optic harness (not shown).
RS232/FO Converter Kit
(Part #: 1-152624-01)
DB25 Adapter on
Serial Cable
DB25-DB25
Gender Changer
Adapter
DB9 Adapter on
Serial Cable
RS232 Converter
Figure 1-8 RS232/FO Converter Kit
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1–12
2
Planning
Chapter 2, “Planning” provides
information to help plan the installation of
the Xantrex GT250 E 250 kW Grid-Tied
Photovoltaic Inverter.
This manual is for use by qualified personnel only.
Planning
Overview of Xantrex GT250 E Installation
WARNING: Shock Hazard
Installations of this equipment should only be performed by qualified technicians.
Installers must meet all local and state code requirements for licensing and
training for the installation of Electrical Power Systems with AC and DC voltage to
600 volts.
Planning
Planning for a system requires complete understanding of all the components
that are involved to successfully install the Xantrex GT250 E to meet the required
national, state, and local codes.
Definition
A power system (such as the Xantrex GT250 E) is a collection of devices
designed to supply AC power to the utility grid from a solar energy (PV) source.
Components
All types of grid-tied inverter installations, residential or industrial, share common
components. This chapter describes each component and suggests the
minimum requirements for a safe installation.
Location
The Xantrex GT250 E 250 kW Grid-Tied Photovoltaic Inverter is designed to be
installed in an indoor location. The Xantrex GT250 E must be anchored to a level,
concrete floor or pad.
Clearance
Adequate ventilation and service access must be taken into consideration when
installing the Xantrex GT250 E. See “Environmental Requirements” for specific
clearance requirements and ambient temperature requirements.
PV Planning
To determine the number of photovoltaic panels that are required for the PV
power plant, please use the PV planning tool from the Schneider Electric website:
1. Go to www.schneider-electric.com.
2. Open the Products and Services tab and click Renewable Energies.
3. Navigate to your specific product page.
4. Click Sizing Tools.
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Environmental Requirements
Environmental Requirements
The following environmental conditions must be established and maintained to
ensure the safe and efficient operation and servicing of the Xantrex GT250 E.
•
Maintain a minimum clearance of 60 cm plus local safety requirements in
front of the enclosure for air intake, maintenance and serviceability.
•
External cabling enters the Xantrex GT250 E from the bottom. Either the
Xantrex GT250 E needs to be placed over a foundation hole which holds the
cables, or placed on top of a hollow platform which allows access to the
bottom of the Xantrex GT250 E.
•
If external air is used for ventilation, the required liter per minute (L/M) rate
must be no less than 87,000 L/M. This assumes the temperature inside the
building is allowed to rise 10 °C (18 °F) above the outside temperature.
Therefore, the maximum allowable outside ambient temperature is 50 °C
(50 °C minus 10 °C equals 40 °C Maximum Ambient Temperature) or 122 °F
(122 °F minus 18 °F equals 104 °F Maximum Ambient Temperature).
If air conditioning is planned the heat load of the Xantrex GT250 E is 60,000
BTU/Hour at full load.
Ground Requirements
This product is intended to be installed as part of a permanently grounded
electrical system per National Electric Code ANSI/NFPA 70 and EU requirements
as well as all state and local code requirements (for example DIN/VDE). A copper
ground rod must be installed within 3 ft. (1 m) of the Xantrex GT250 E Enclosure.
This is the single point earth ground for the inverter system. The single point
ground for the system is to be made at the AC ground bus bar (PE) in the AC
Interface Enclosure.
Communication Requirements
The Xantrex GT250 E comes equipped with a MultiTech® 56K modem to provide
remote access to the unit. A direct analog phone line to the local phone service is
required to use this feature.
The phone line used for Xantrex GT250 E communication cannot be routed
through a Private Branch Exchange (PBX) unless an analog PBX card is used.
Determine which communications options are required for the installation and
procure the appropriate equipment and phone access.
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Planning
Utility Side Isolation Transformer Requirements
The Xantrex GT250 E may be supplied with a custom, high-efficiency, isolation
transformer as a separate component. The utility side windings of the isolation
transformer are configured Wye and must match the voltage at the utility inter-tie.
The Xantrex GT250 E is a balanced, three-phase, current-sourcing inverter and
only operates with the presence of a stable utility voltage. The transformer is also
supplied with a neutral connection on the utility interconnect. Connection of this
utility-side neutral does not affect the operation of the inverter, however
connection of the neutral on the inverter-side does affect the operation and must
be left floating or disconnected. Single-phase, grounded loads which may be
present between the transformer and utility, will maintain their existing ground
reference at the utility distribution transformer.
WARNING: Lethal Voltage
Grounding the neutral of a Wye-wound transformer may create an “open delta”
condition, depending on the utility configuration. This condition may keep the
Xantrex GT250 E from detecting a loss of phase condition on the utility system,
which may allow potentially lethal voltage to be present on the open-phase
wiring.
CAUTION: Equipment Damage
If the Isolation Transformer neutral terminal is tied to ground, it will cause
irreparable damage to the Xantrex GT250 E. Check local regulations for their
requirements regarding the connection of these neutrals.
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Electrical Diagrams
Electrical Diagrams
Since installations vary widely, a sample electrical diagram of the Xantrex GT250 E
is provided in Figure 2-1. This diagram is to be used for system planning
purposes only.
For more detailed information, refer to the schematic illustrations inside the door
of the enclosure for electrical schematics.
Solar inverter GT500E
Sinus Filter
high voltage
transformer
IGBT matrix
line
contactor
315 V
L1
grid
L2
lightning
protection
EMV
Filter
DC-link
L3
AC
switch
line
choke
inverter
choke
lightning
protection
DC
INPUT
EMV
Filter
DC
switch
Figure 2-1 Xantrex GT250 E Electrical Diagram
Conduit Entry
Figure 2-2 shows the maximum allowable area and location in which electrical
conduits may penetrate the Enclosures of the Xantrex GT250 E.
All measurements in mm
Figure 2-2 Enclosure Conduit Entries, Bottom Side View
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Planning
Anchoring the Xantrex GT250 E
The Xantrex GT250 E is designed to be installed in an indoor location. It must be
placed on and anchored to a level concrete floor or pad. The concrete floor or
pad, upon which the Xantrex GT250 E is anchored, must be structurally
designed to meet any local, state, or national requirements for weight, seismic,
and wind sheer if applicable.
Twelve 16 mm holes are provided in the feet of the Enclosure for anchoring to the
floor or pad.
Figure 2-3 depicts the layout pattern of the anchoring holes for the Xantrex
GT250 E inverter assembly.
All measurements in mm
Figure 2-3 Main Inverter Anchor Bolt Pattern (Not to scale)
The floor or pad should either be pre-drilled to accept masonry anchors or have
pre-installed anchoring bolts.
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3
Installation
Chapter 3, “Installation” describes the
procedures needed to install the Xantrex
GT250 E 250 kW Grid-Tied Photovoltaic
Inverter. This section includes unpacking
and moving instructions, mounting
instructions, and cabling instructions.
This manual is for use by qualified personnel only.
Installation
Unloading
WARNING: Heavy Equipment
The Xantrex GT250 E weighs approximately 1160 kg. Attempting to lift the
equipment by other than the recommended lifting points may damage the
equipment or present a personnel safety hazard and void the warranty. Keep all
the doors closed and latched when moving the Enclosures. Leaving the door
latches unsecured may result in damage to the unit and void the warranty.
Moving the Xantrex GT250 E
To move the Xantrex GT250 E, use a forklift that has a sufficient lift capacity and
has a 66 cm fork span or a crane with a minimum lift capacity of 2000 kg.
WARNING: Equipment is heavy
If lifted incorrectly, the Xantrex GT250 E could overbalance and cause personal
injury.
Follow Figure 3-2 and Figure 3-3 to locate the balance point (center of gravity
symbol) of various configurations.
CAUTION: Equipment Damage
c
To move the Xantrex GT250 E, use a forklift that has a sufficient lift capacity and
has a 66 cm fork span.
To move the Xantrex GT250 E by forklift while it is still inside the shipping
crates:
1. Place the forks of the forklift below the shipping crate at the points specified
on the shipping crate.
2. Pay attention to the balance point (center of gravity) sticker.
3. Lift the Enclosure from beneath the shipping crate.
Unpacking the Xantrex GT250 E
To unpack the Xantrex GT250 E from the shipping crate:
1. Using a claw hammer or pry bar, remove the crate’s wood top and side
panels.
2. Remove the Xantrex GT250 E anchor hardware that attaches it to the
shipping pallet.
3–2
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Unloading
Removing the Pallet and Moving the Xantrex GT250 E
CAUTION: Equipment Damage
c
To move the Xantrex GT250 E, use a forklift that has a sufficient lift capacity and a
66 cm fork span.
Use Figure 3-1 to locate the balance point or center of gravity (
symbol).
Center of Gravity
Side view
Figure 3-1 Center of Gravity
Moving with a Forklift
To move the Xantrex GT250 E using a forklift:
1. Place the forks of the forklift below the unit at the points specified in
Figure 3-2.
2. Lift the Xantrex GT250 E from beneath the respective Enclosures.
Be sure to use a forklift with a 66 cm fork span.
3. Remove the pallet from beneath the unit.
4. Once the pallets are removed from the units, use the same lifting locations to
lift the units into the place where they are to be permanently located.
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Installation
Figure 3-2 Forklift Lifting Locations - Underneath Unit
Moving with a Crane
Ensure you dismantle the top for transport.
To move the Xantrex GT250 E with a crane:
1. Attach the crane to the four anchor points on the track.
2. Pay attention to the balance point (center of gravity) sticker.
3. Lift the Enclosure into position.
4. Remove the tracks before operating the Xantrex GT250 E.
Figure 3-3 Lifting Using a Crane
Important: Before proceeding with the installation, determine the location and
layout of the components, conduit penetration locations, conductor and conduit
sizing, and method for anchoring the unit. Ensure adequate space is provided
for clearance for ventilation and serviceability. Review Chapter 2, “Planning” if
necessary before proceeding.
3–4
152936
This manual is for use by qualified personnel only.
Mounting and Anchoring the Units
Mounting and Anchoring the Units
To mount and anchor the Xantrex GT250 E:
1. Predrill the floor or pad to accept masonry anchors for 12 mm bolts, or
ensure it has pre-installed anchoring bolts that will fit the 16 mm mounting
holes. See Figure 2-3 on page 2–6.
2. Lift the Xantrex GT250 E from beneath with a forklift or pallet jack as shown in
Figure 3-2 on page 3–4, or lift the Xantrex GT250 E from above with a crane
as shown in Figure 3-3 on page 3–4. Move the Enclosure into place.
3. Secure the Enclosure feet to the floor with the appropriate anchoring
hardware.
Opening or Closing Access Doors
To lock or unlock the front door on the main inverter:
1. Use the key provided with the unit.
a) Insert the key in the lock and turn clockwise to open or counterclockwise
to lock.
b) Pull the front door open from the center.
Main Inverter
Front Door Lock
Figure 3-4 Inverter Enclosure Access Doors
152936
3–5
This manual is for use by qualified personnel only.
Installation
To Open Access Door:
1. Confirm that the AC Disconnect Switch
handle is placed in the OFF (Open)
position prior to opening the door.
AC Interface
2. Using the key supplied with the unit,
turn clockwise to unlock.
3. Pull open from right side.
Disconnect
Switch
To Close Access Door:
1. Confirm that the AC Disconnect Switch
handle is placed in the OFF (Open)
position prior to closing the door.
2. Close the door.
3. Using the key supplied with the unit,
turn counterclockwise to lock.
Figure 3-5 AC Interface Access Door
To Open Access Door:
1. Confirm that the DC Disconnect Switch
handle is placed in the OFF (Open)
position prior to opening the door.
DC
2. Using the key supplied with the unit,
turn clockwise to unlock.
Disconnect
Switch
3. Pull open from the left side.
To Close Access Door:
1. Confirm that the DC Disconnect Switch
handle is placed in the OFF (Open)
position prior to closing the door.
2. Close the door.
3. Using the key supplied with the unit,
turn counterclockwise to lock.
Figure 3-6 DC Interface Access Door
3–6
152936
This manual is for use by qualified personnel only.
Wiring - General
Wiring - General
All wiring methods and materials shall be in accordance with the National
Electrical Code ANSI/NFPA 70, European Requirements, as well as all state and
local code requirements (for example, DIN / VDE). When sizing conductors and
conduits interfacing to the Xantrex GT250 E, both shall be in accordance with the
National Electric Code ANSI/NFPA 70, European Requirements, as well as all
state and local code requirements (for example DIN / VDE).
WARNING: Shock Hazard
The Xantrex GT250 E Enclosures contain exposed high-voltage conductors. The
Enclosure doors should remain closed with the latches tightened, except during
installation, maintenance or testing. These servicing instructions are for use by
qualified personnel who meet all local and state code requirements for licensing
and training for the installation of Electrical Power Systems with AC and DC
voltage to 880 volts. To reduce the risk of electric shock, do not perform any
servicing other than that specified in the installation instructions unless you are
qualified to do so. Do not open the cabinet doors if extreme moisture is present.
WARNING: Lethal Voltage
In order to remove all sources of voltage from the Xantrex GT250 E, the incoming
power must be de-energized at the source. This may be done at the main utility
circuit breaker and by opening the AC Disconnect and the DC Disconnect
Switches on the Xantrex GT250 E. Review the system configuration to determine
all of the possible sources of energy. In addition, allow 20 minutes for the DC bus
capacitors, located within the cabinet, to discharge after removing power.
CAUTION: Equipment Damage
When connecting external AC wires to the Xantrex GT250 E, positive phasing
sequence must be maintained throughout the installation process. Refer to the
system schematics in the unit enclosure for proper phasing convention.
Important: Take care to keep the wire bundles away from any sharp edges
which may damage wire insulation over time. Consult the European Standards
(for example, DIN/VDE) and NEC ANSI/NFPA 70 Code Book to ensure code
compliance.
The model Xantrex GT250 E has a three-phase output.
Conductor size should have been pre-determined when the conduit was
installed. Prepare the appropriate length conductors for each connection.
152936
3–7
This manual is for use by qualified personnel only.
Installation
Overcurrent Protection
Unless provided as part of the Schneider Electric supplied equipment; the AC
overcurrent protection for the Utility Interconnect (Grid-tie) must be provided by
the installer as part of the Xantrex GT250 E installation.
CAUTION: Equipment Damage
In accordance with the NEC, ANSI/NFPA 70 (Ninth Edition) the following branchcircuit overcurrent protection must be provided:
• 1200A maximum
Conductor Termination
The Xantrex GT250 E has terminals and bus bars for making all wiring
connections required for the installation. All terminals used for making AC and
DC connections require the use of copper conductors with an insulation rating of
90 °C (194 °F) (or higher). For bolt size, and torque values for the AC terminals,
see Table A-5 on page A–5. For bolt size, and torque values for the DC terminals,
see Table A-6 on page A–5. All wiring methods and materials shall be in
accordance with the National Electrical Code ANSI/NFPA 70, European
Requirements, as well as all state and local code requirements (for example,
DIN/VDE).
AC Interface
Enclosure
The AC line terminals in the AC Interface Enclosure (L1, L2, and L3) have three
bolts per pole and a maximum of two cables per bolt. These terminals require the
use of crimp-on type ring-terminals or compression lugs.
See Figure 3-8 on page 3–9 for the location of these terminals.
The AC neutral terminal in the AC Interface Enclosure is one bolt per pole and
and a maximum of two cables per bolt. These terminals require the use of crimpon type ring terminals or compression-type lugs.
See Figure 3-9 on page 3–11 for the location of this terminal.
The AC Control Voltage Terminals are one wire per terminal (-X2-L1, -X2-L2, -X2PE). These terminals require a crimp-on ferrule properly sized for the wire.
See Figure 3-10 on page 3–11 for the location of these terminals.
DC Interface
Enclosure
The DC terminals in the DC Interface Enclosure (PV+ and PV-) have four bolts
per pole and a maximum of two cable per bolt. These terminals require the use of
crimp-on type ring-terminals or compression lugs.
See Figure 3-11 on page 3–12 for the location of these terminals.
Important: Keep these cables together as much as possible, and ensure that all
cables pass through the same knockout and conduit fittings, thus allowing any
inductive currents to cancel.
3–8
152936
This manual is for use by qualified personnel only.
Wiring - General
Grounding
System Grounding
Install a copper ground rod within 3 ft. (1 m) of the Xantrex GT250 E Enclosures
per the National Electric Code ANSI/NFPA 70. The single-point ground for the
system is to be made at the ground bar in the AC Interface Enclosure.
Ground Bar to be
used for the Single
Point Ground
Figure 3-7 Single-point Ground; Ground Bar
Chassis Ground
The chassis ground is a copper bus bar in the Main Inverter Enclosure and has a
12 mm bolt for terminating the DC ground. The ground conductor size depends
on the size of the main circuit breaker. NEC Table 250.122 (Ninth Edition) requires
that the ground conductor be at least #3 AWG for a 400 A circuit breaker and #6
AWG for a 200 A circuit breaker.
The equipment ground on the Xantrex GT250 E is marked with PE.
Ground Bar to be
used for the
Chassis Ground
Figure 3-8 Chassis Ground Bar (TB1)
152936
3–9
This manual is for use by qualified personnel only.
Installation
Wiring - Specific
This section provides information for connecting the AC and DC conductors and
the ground conductors. Table A-5 and Table A-6 on page A–5 show the
specifications of the AC and DC wiring.
To connect the transformer to AC Interface Enclosure:
1. Open the door to the AC Interface Enclosure.
2. Route the AC power conductors L1, L2, L3 phase, neutral, and a neutral
ground cable through the conduit from the transformer to the AC Interface
Enclosure.
3. Connect the AC power conductors at the L1 (A phase), L2 (B phase), and L3
(C phase) terminals using the M12 hardware. Cables to these terminals must
use a crimp-on type ring terminal or compression-type lug. See Figure 3-9 for
the location of these terminals.
4. Connect the neutral conductor at the Groundbar. Terminations for the neutral
and ground conductors within the AC Interface Enclosure at the groundbar
are made with 12 mm hardware. Cables to these terminals must use a crimpon type ring terminal or compression-type lug. See Figure 3-8 for the location
of these terminals.
5. Close the door to the AC Interface Enclosure.
To connect the AC Control Voltage to AC Interface Enclosure:
6. Open the door to the AC Interface Enclosure.
7. Route the AC Control voltage conductors –X2-L1, -X2-L2 and –X2-PE through
the conduit from the source to the AC Interface Enclosure.
8. Connect the AC Control voltage conductors at the –X2 terminal block. These
conductors must use crimp-on type Ferrule terminations and the M3 terminal
hardware. See Figure 3-9 for the location of these terminals.
9. Close the door to the AC Interface Enclosure.
3–10
152936
This manual is for use by qualified personnel only.
Wiring - Specific
L1 Phase terminal
L3 Phase terminal
L2 Phase terminal
Figure 3-9 AC Terminal Connections from the Utility
AC Control Voltage
Terminals
(-X2-L1, -X2-L2, X2-PE)
Figure 3-10 AC Control Voltage Terminal Connections
152936
3–11
This manual is for use by qualified personnel only.
Installation
PV Array Connections
To make the connections from the PV Array/combiner to DC Interface
Enclosure:
1. Open the door to the DC Interface Enclosure.
2. Route the PV Array cables conductors POSitive (PV+) and NEGative (PV-)
through the conduit to the DC Interface Enclosure, entering on the underside.
3. The DC power conductor terminations are made at the PV+, and PVallocations and the ground bar. See Figure 3-11.
4. Terminations for the POSitive, NEGative, and PE (ground) conductors within
the DC Interface Enclosure are made using the 12 mm hardware.
5. Close the door to the DC Interface Enclosure.
PV+
PV-
Figure 3-11 PV Array Cable Routing and Terminations
3–12
152936
This manual is for use by qualified personnel only.
Remote Communications
Remote Communications
The Xantrex GT250 E provides remote communications for system monitoring or
data logging through a personal computer using the Xantrex Solar Graphic User
Interface (GUI) software. The GUI software provides a windows-based interface
program that accesses, monitors, and controls the features and functions of the
unit. The GUI also provides additional data logging and tracking features which
are not available through the UFCU. If multiple inverters are networked together,
the software is capable of tracking up to 50 inverters on the same network.
The PC can be connected to the unit either directly or remotely. Before installing
the GUI software, it will be necessary to determine and establish the proper
communication line to support the desired connection.
A local telephone line is required to use the factory-installed modem.
Telephone Line Connections
To connect telephone service:
1. Unlatch and open the door to the AC interface enclosure.
2. Route the Telephone line through the wiring duct work.
3. Connect the Telephone to the RJ-11 termination. The RJ11 Termination is
located to the right of -F36, see Figure 3-12.
4. Close and latch the door to the AC interface enclosure.
-F36 Communication
Port
Figure 3-12 Telephone Cable Routing
152936
3–13
This manual is for use by qualified personnel only.
Installation
PC Connection Methods
The personal computer can be connected the following ways.
•
direct connection - to serial communication port on the controller board
•
remote connection - through the modem installed in the Enclosure
Remote Connection (Standard)
The Xantrex GT250 E comes with a MultiTech™ 56K modem installed. This allows
monitoring and control of the inverter from a remote office, a home office, motel
room, or any location where a laptop or desktop computer can make a modem
telephone call.
The GUI can dial up the inverter and receive fault report calls from it through a
standard Hayes-compatible, landline modem. When the GUI initiates a call
through the modem at the GUI computer, the inverter’s modem answers the call
and initiates a 9600 baud serial connection, effectively as if the GUI was
connected directly. Or, if the inverter experiences a fault, it will initiate a call to the
GUI and report the fault details.
If connecting to the Inverter remotely using the factory-installed modem:
1. Plug the local phone line into the port provided in the Inverter Enclosure
following the instructions on page 3–13.
2. Install the GUI Software. See the Xantrex GT250 E 250 kW Grid-Tied
Photovoltaic Inverter Operation and Maintenance Manual (Part #: 152937) for
installation instructions.
3. Use a Terminal Emulation program on the PC to access the modem.
See the GUI Help Menu "Communication by Modem" for instructions on
setting up the Terminal Emulation program on the computer. See also,
"Connect to Telephone Number" and "Connect to Remote Inverter by Modem"
for additional information.
Direct Connection (Serial)
The direct connection provides the means to use the features of the GUI by
connecting a PC directly to the CCU. This allows field personnel to monitor and
control the inverter from a nearby laptop computer directly connected by a serial
cable. The computer connects to the inverter directly through one of its serial
COM ports running at 9600 baud.
The RS232/FO Converter kit (Manufacturer p/n: 1-152624-01 – KIT, COMM,
DIRECT, PC TO CCU) is required for this connection to change the
communication protocol from ethernet to serial in the Enclosure. The kit contains
an RS232/FO converter configured for PC use with an adapter, a DB9/DB25
serial cable and a fiber optic harness.
3–14
152936
This manual is for use by qualified personnel only.
Remote Communications
If connecting the PC directly to the inverter:
1. Procure an RS232/FO Converter kit containing the converter, a DB9/DB25
serial cable and a fiber optic harness.
2. Record the color of the fibers connected to the white(TX) and Grey(RX)
connectors of the Factory installed RS232/FO Converter and disconnect
them from the Converter.
3. Remove the two covers from the fiber connectors on the new RS232/FO
Converter and install them on the Factory installed converter.
4. Disconnect the power plug from the factory-installed converter and plug it in
to the new RS232/FO Converter.
5. Using the fiber colors recorded in Step 2, connect the fibers to the new
converter. Allow the Converter to hang from the fibers and the power cord.
6. Plug the DB25-to-DB25 Gender-changer Adapter into the Serial
Communications Port on the RS232/FO Converter.
7. Plug the DB25 connector on the serial cable into the gender-adapter and the
DB9 connector of the serial cable into the serial port on the computer. Route
the cable such that it does not put additional strain on the fibers and power
cord.
RS232/FO Converter Kit
(Part #: 1-152624-01)
DB25 Adapter on
Serial Cable
DB25-DB25
Gender Changer
Adapter
DB9 Adapter on
Serial Cable
RS232 Converter
Figure 3-13 RS232/FO Converter Kit Installation
152936
3–15
This manual is for use by qualified personnel only.
3–16
4
Verification
Chapter 4, “Verification” provides a
checklist to ensure the installation of the
Xantrex GT250 E is correct and complete.
This manual is for use by qualified personnel only.
Verification
Verification Procedure Summary
WARNING: Electrocution Hazard
This chapter describes specific steps to ensure the installation of the Xantrex
GT250 E 250 kW Grid-Tied Photovoltaic Inverter is correct and complete. Failure
to adhere to these warnings could result in severe shock or possible death.
Exercise extreme caution at all times to prevent accidents. These installation
instructions are for use by those familiar and skilled with high voltage
procedures.
WARNING: Shock Hazard
The Xantrex GT250 E Enclosures contain exposed high-voltage conductors. The
Enclosure doors should remain closed with the latches tightened, except during
installation, maintenance or testing. To reduce the risk of electric shock, do not
perform any servicing other than that specified in the installation instructions
unless you are qualified to do so.
WARNING: Lethal Voltage
In order to remove all sources of voltage from the Xantrex GT250 E, the incoming
power must be de-energized at the source. This may be done at the utility main
circuit breaker and by opening the AC disconnect and the DC disconnect
switches on the Xantrex GT250 E. Review the system configuration to determine
all of the possible sources of energy. In addition, allow 20 minutes for the DC bus
capacitors, located within the cabinet, to discharge after removing power.
The following procedures are intended to verify correct installation and proper
wiring of the Xantrex GT250 E. Prior to performing the following verification steps
on the Xantrex GT250 E, review all safety requirements and procedures outlined
in this manual and on any cautionary markings on the components within the
system.
Inspect the following items prior to completion of the installation:
1. Visually inspect all the mechanical connections. This would include both
electrical conduit fittings, as well as Enclosure anchoring and seismic
bracing if required.
2. Visually inspect the electrical connections and verify proper tightness of all
terminations.
3. Visually inspect the Isolation Transformer Wye/Wye connections and ensure
the transformer neutral connection is left disconnected or floating.
4. Perform corrective actions if required.
4–2
152936
This manual is for use by qualified personnel only.
Visual Inspection of Mechanical Connections
Visual Inspection of Mechanical Connections
To perform a visual inspection of the Xantrex GT250 E mechanical
connections:
1. Ensure that the AC and DC Disconnect Switches, as well as any utility
interconnect circuit breakers or main disconnect switches, are opened.
❐
2. Ensure all anchor bolts and any required seismic bracing is properly
tightened and in place.
❐
3. Remove the latches and open the doors of the Inverter Enclosure, the AC
and DC Interface Enclosures and inspect.
❐
4. Verify all wire conduit fittings and connections are properly tightened.
❐
Visual Inspection of Electrical Connections
To perform a visual inspection of the Xantrex GT250 E electrical connections:
1. Ensure that the AC and DC disconnect switches, as well as any utility
interconnect circuit breakers or main disconnect switches, are opened.
❐
2. Ensure all conductors and wiring connections interfacing with the Xantrex
GT250 E are tightened to the correct torque value.
For specific torque values, see Table A-5 on page A–5 and Table A-6 on
page A–5.
❐
3. Verify the AC power conductors terminated at L1, L2, L3 within the AC
Interface Enclosure are terminated correctly and properly sequenced.
❐
4. Verify DC power conductors terminated at PV+ and PV- within the DC
Interface Enclosure are terminated correctly and properly polarized.
❐
Corrective Action
Perform after initial inspection (if required):
1. Correct any necessary repairs pertaining to the previous inspection steps.
2. Replace the latches and close the doors of the Inverter Enclosure, the AC
and DC Interface Enclosures.
3. Ensure that the AC and DC Disconnect Switches, as well as any utility
interconnect circuit breaker or main disconnect circuit breaker, are left open.
152936
4–3
This manual is for use by qualified personnel only.
4–4
A
Specifications
Appendix A provides the environmental
and electrical specifications for the
Xantrex GT250 E 250 kW Grid-Tied
Photovoltaic Inverter.
This manual is for use by qualified personnel only.
Specifications
System Specifications
The Xantrex GT250 E has been designed for photovoltaic power systems, which
operate within the following specifications.
CAUTION: Equipment Damage
Operation of the Xantrex GT250 E in a manner other than specified in this manual
may cause damage to the Xantrex GT250 E and other system components and
will void the terms of the warranty.
Environmental Specifications
CAUTION
The Xantrex GT250 E will be destroyed if stored outside. Only store in dry areas.
Table A-1 Environmental Specifications
Specification
Value
Dimensions
2112 mm H x 2006 mm W x 605 mm D
(83 in. H x 78 in. W x 24 in. D)
Weight
1160 kg (2557 lbs)
Allowable Ambient Temperature
Operating
Storage
-10 °C to 45 °C Maximum (14 °F to 113 °F)
-25 °C to 55 °C Maximum (-13 °F to 131 °F)
Relative Humidity
EN60721 temperature 1K1 humidity 1K3
Elevation
1500 m
Storage Air Pressure
700 to 1060 mbar
Protection Class
IP21
Cooling Air Power Element
1800 m3/h starting temperature 68 °C
Interior Cooling Air
2400 m3/h starting temperature 40/45 °C
Clearance (ventilation and
serviceability)
Top
100 mm
Front
600 mm (door clearance) plus local safety standards
A–2
152936
This manual is for use by qualified personnel only.
System Specifications
Electrical Specifications
Table A-2 provides the AC and DC specifications for the Xantrex GT250 E.
Table A-2 Electrical Specifications
Specification
Value
Suggested Maximum PV Array Power
280 kWp
Nominal AC Input Voltage
315 Vac ± 5%
Maximum AC Output Current
460 Arms
Nominal AC Input Frequency
50 Hz
(+0.5 to -0.7 Hz acceptable range)
Rated Output Power
250.0 kW
at nominal AC input voltage (315 V)
Peak Power Tracking Window
450 to 800 Vdc
Maximum Open Circuit Voltage
850 Vdc (880 Vdc optional)
Maximum DC Input Current
555 A
DC Input
450 to 850 Vdc
Line Power Factor
approximately 1 (above 20% rated
power)
AC Current Distortion
< 3% THD at rated power
Switching Frequency
4.5 kHz
Efficiency without Transformer
700 Vdc 315 Vac 250 kW 96.8%
control voltage supplied externally
External Control Voltage
230 V/400 V
External Control Voltage’s max. Power
Output
2000 W
Inverter’s Couple Capacity Against Earth
approx. 15 µF
Regulatory Specifications
Table A-3 provides the regulatory specifications for the Xantrex GT250 E.
Table A-3 Regulatory Specifications
Standard
Regulation Met
General Standards
EN50178
VDEW
CE
Emitted Interference
EN61000-6-4
Interference Resistance
EN61000-6-2
152936
A–3
This manual is for use by qualified personnel only.
Specifications
Over Voltage, Under Voltage and Frequency Ranges
Table A-4 provides the over voltage, under voltage, over-frequency, and underfrequency detection limits for the Xantrex GT250 E. These detection limits have
been factory tested and deemed to be in compliance with requirements for utility
interaction.
Table A-4 Over/Under Voltage and Over/Under Frequency Ranges
Vac Condition
(% of Nominal)
Voltage Range
50Hza
Voltage Range
60Hza
Low Range
275 < Vac < 325
275 < Vac < 325 100 ms
283.5 < Vac
283.5 < Vac
100 ms
305  Vac <355
305  Vac <355
100 ms
346.5 < Vac
346.5 < Vac
100 ms
Trip Time
87% < Vac < 103%
Low Default
90% < Vac
High Range
97% < Vac < 113%
High Default
110% < Vac
50 Hz Low Range
48.0 < f < 50.5
2 cycles
49.0 < f
2 cycles
49.5 < f < 52.0
2 cycles
51.0 < f
2 cycles
-2.0 < f < 0.5
50 Hz Low Default
-1.0 < f
50 Hz High Range
-0.5 < f < 2.0
50 Hz High Default
1.0 < f
60 Hz Low Range
59.5 < f < 60.5
2 cycles
59.5 < f
2 cycles
59.5 < f < 60.5
2 cycles
60.5 < f
2 cycles
-0.5 < f < 0.5
60 Hz Low Default
-0.5 < f
60 Hz High Range
-0.5 < f < 0.5
60 Hz High Default
-0.5 < f
a.Adjustable, password protected
A–4
152936
This manual is for use by qualified personnel only.
System Specifications
Bolt Sizing and Torque Requirements
Table A-5 provides acceptable bolt sizes, and torque values for AC terminal
connections.
Table A-5 AC Terminal Bolt Size, and Torque Values
Max. # of
Conductors per
Terminal
Bolt
(Hardware)
Size
Torque
Requirement
s
PE (Enclosure
Ground)
2
1/M12
75 Nm
(55 lb ft)
L1, L2, L3
6
3/M12
75 Nm
(55 lb ft)
-X2-L1, -X2-L2,
-X2-PE
1
M3
0.6 – 0.8 Nm
(5.3 – 7 lb ft)
AC Terminal
Connections
Table A-6 provides acceptable bolt sizes, and torque values to be connected to
the Xantrex GT250 E DC terminal connections.
Table A-6 DC Terminal Bolt Size, and Torque Values
AC Terminal
Connections
Max. # of
Conductors
per Terminal
Bolt
(Hardware)
Size
Torque
Requirement
s
PV+, PV-
8
4/M12
75 Nm
(55 lb ft)
152936
A–5
This manual is for use by qualified personnel only.
Specifications
Dimensions
Dimensions in mm
475
675
475
605
2112
2006
Figure A-1 Xantrex GT250 E Dimensions
A–6
152936
This manual is for use by qualified personnel only.
Schneider Electric
www.schneider-electric.com
☎
North America 1 408 987 6255
✉
1 925 245 1022
re.techsupport@schneider-electric.com
France
0 825 012 999
fr-re-techsupport@fr.schneider-electric.com
Deutschland
+49 (0) 180 575 6575 +49 (0) 2102 404 7101
solarservice@de.schneider-electric.com
España
+34 93 498 7466
+34 93 305 5026
re.techsupport@es.schneider-electric.com
L'Italia
+39 035 4151111
+39 035415 3200
IT-pronto-contatto@it.schneider-electric.com
For other country details please contact your local Schneider Electric Sales Representative or visit our website at:
http://www.schneider-electric.com/sites/corporate/en/support/operations/local-operations/local-operations.page
152936
Printed in USA