5235 Single Phase Credit Meter

Electricity Meters

Residential BS / IEC

British Standard

5235 Single Phase Credit Meter

Date: 20/11/08

Filename: 5235 User Manual

Q P u l s e N o : I B 0 4 7

© Landis+Gyr

User Manual & Technical Specification

Page 2 of 21 Issue: 4 5

Revision History

3.

4.

5.

Issue Date

1.

Comments

10/10/04 New document

2. 10/01/05 Added section on the No power read and Appendix B. Added Document number.

01/11/05

15/02/06

18/11/08

Added new amendments

Added D-L version removed F version (reactive energy still needs adding)

Revised manual to new branding guidelines and layout

Copyright notice

The material in this document is the property of Landis+Gyr. Our products are under continual improvement and we reserve the right to make changes without prior notice

Landis+Gyr

1 Lysander Drive,

Northfields Industrial Estate,

Market Deeping,

Peterborough

PE6 8FB www.landisgyr.com

© Landis+Gyr 5235 Single Phase Credit Meter

– User Manual & Technical Specification

Table of Contents Issue: 4 Page 3 of 21

Table of Contents

8

8.1

8.2

8.3

7

7.1

7.2

7.3

5

5.1

5.2

5.3

6

6.1

6.2

9

10

10.1

4

4.1

4.2

4.3

3

3.1

3.2

3.3

3.4

1

1.1

1.2

1.3

1.4

1.5

2

2.1

2.2

Introduction____________________________________________________________ 5

Purpose _________________________________________________________________ 5

Meter Overview ___________________________________________________________ 5

Model versions ____________________________________________________________ 5

Reference Standards _______________________________________________________ 5

20 Year Certification Life ____________________________________________________ 5

Safety Information ______________________________________________________ 7

Responsibilities ___________________________________________________________ 7

Safety Regulations _________________________________________________________ 7

Operational Functions ___________________________________________________ 9

Measurement _____________________________________________________________ 9

Anti-creep _______________________________________________________________ 9

Meter Memory ____________________________________________________________ 9

Reverse / Export Energy registration __________________________________________ 9

User Interfaces ________________________________________________________ 11

Register Displays _________________________________________________________ 11

Pulsed Output (Option) ____________________________________________________ 11

Switching inputs (D model) _________________________________________________ 11

Installation____________________________________________________________ 13

Construction_____________________________________________________________ 13

Meter fixing _____________________________________________________________ 13

Wiring _________________________________________________________________ 13

Technical Summary ____________________________________________________ 15

Technical Summary _______________________________________________________ 15

Dimensions _____________________________________________________________ 16

Maintenance and Service ________________________________________________ 17

Meter Check _____________________________________________________________ 17

Meter Testing____________________________________________________________ 17

Post Installation Configuration Changes _______________________________________ 17

Measures in the Event of Faults __________________________________________ 18

Operating Faults _________________________________________________________ 18

Disconnecting the Meter ___________________________________________________ 18

Repairing the Meter _______________________________________________________ 18

Decommissioning and Disposal __________________________________________ 20

Glossary of Terms and Standards ________________________________________ 21

Acronyms _______________________________________________________________ 21



© Landis+Gyr

Page 4 of 21

10.2

Issue: 4 5 Table of Contents

Measurement Units ______________________________________________________ 21



Introduction Issue: 4 5 Page 5 of 21

1 Introduction

Introducing the 5235, single and multi-rate tariff options, Single Phase BS

Standard Credit Meter

1.1 Purpose

This document details the functions for the following variants of the 5235

Single Phase Credit Meters, active energy only.



Single Rate, kWh meter



Single Rate, kWh meter with class A pulse output



Multi-rate Externally switched meter

1.2 Meter Overview

The meter is a whole current static electricity meter capable of measuring kWh in single and two rate variants. An additional option to have a pulsed output is also available on the single rate version. The meter is approved to

IEC62052

– 11: 2003 & IEC62053 – 21:2003 classes 1.0 and 2.0 and has been given a 20 year certification life by OFGEM.

The meter is sealed for life by a liquid welding process and therefore does not carry an external wire seal.

All meter types feature an optical port used for reprogramming. The metrology LED is incorporated into this port and pulses at a rate of 1000 impulses per kWh.

All facia details are permanently laser etched directly onto the meter front.

Options would normally include property details, serial numbering and various barcode options. Other details may be printed such as customer l ogo’s and meter type codes etc.

1.3 Model versions

A character denotes meter version after the model number:

A - Single rate only active only

B - Single rate with pulsed output active only

D - Externally switched two-rate active only

1.4 Reference Standards

The meter has been tested by OFGEM and has the following certification.

IEC62052

– 11: 2003. IEC62053 – 21:2003.

Alternating current static watt-hour meters for active energy (Classes 1 & 2). Other standards are in the technical summary.

1.5 20 Year Certification Life

This meter has been given a certification life of 20 years by OFGEM the UK regulatory body. This has been achieved by proving the reliability of each of the components in the meter and by using mathematical models provided



© Landis+Gyr

Page 6 of 21 Issue: 45 Introduction by OFGEM. This modelling has shown a reliability of better than 97% over twenty years. The OFGEM approval number for this meter is 986.

OFGEM certificates and lifetime reports are available upon request. Please contact [email protected]



Safety Information Issue: 4 5 Page 7 of 21

2 Safety Information

Attention is drawn as follows in the individual chapters of this user manual with classified word symbols and pictographs to the relevant danger level, i.e. the severity and probability of any danger:

Definition of Danger

This symbol is used to indicate a possibly dangerous situation which could result in severe physical injury or a fatality.

Definition of Warning

This symbol is used to indicate a possibly dangerous situation which could result in minor physical injury or material damage.

Definition of Note

This symbol is used to indicate general details and other useful information.

In addition to the danger level, all safety information also describes the type and source of the danger, it’s possible consequences and measures to counteract the danger.

2.1 Responsibilities

The owner of the meters

– normally the utility – is responsible that all persons engaged on work with meters:



Have read and understood the relevant sections of the user manual.



Are sufficiently qualified for the work to be performed.



Strictly observe the safety regulations (according to section 1.6) and the operating information in the individual chapters.

In particular, the owner of the meters bears responsibility for the protection of persons, prevention of material damage and the training of personnel

(Landis+Gyr. provides training courses for this purpose on specific equipment; please contact the relevant agent if interested).

2.2 Safety Regulations

The following safety regulations must be observed at all times:



This equipment does not contain a disconnection device. Means for disconnection from the supply must be provided as part of the building installation. Do not work on the equipment unless the



© Landis+Gyr

Page 8 of 21 Issue: 45 Safety Information supply is disconnected. If disconnection is done by removal of fuses or other cut-outs, the removed disconnection devices must be kept secure from replacement while work is performed. If disconnection is provided by a switch, the switch shall conform to the requirements of IEC 947-1 and IEC 947-3 or equivalent.



This equipment does not contain an overcurrent protection device.

Overcurrent protection must be provided as part of the building installation. Maximum overcurrent device rating is 100 Amp at 415

Volts, conforming to the requirements of BS1361, or equivalent.



The maximum rating of the meter is 100A and requires connecting conductors of 25mm

2

. Failure to do so could result in irreparable damage to the meter. If smaller connecting conductors are used an appropriate mains fuse must be used.



Only suitably trained and qualified personnel shall be allowed to work on the equipment. Local safety standards shall be observed and shall take precedence over these regulations in points of conflict.



The meters must be held securely during installation. They can cause injuries if dropped.



Meters that have fallen must not be installed, even if no damage is apparent, but must be returned for testing to the service and repair department responsible (or the manufacturer). Internal damage can result in functional disorders or short-circuits.



The meters must on no account be cleaned with running water or with high-pressure devices. Water penetrating can cause shortcircuits.



The meter terminal cover should be secured in place before any load is supplied.



Operational Functions Issue: 4 5 Page 9 of 21

3 Operational Functions

The standard operational functions of the 5235

3.1 Measurement

The Meter is a 120V or 220-240Vac, 50Hz or 60Hz, 5 to 100A Single

Phase Credit Meter. It contains a measuring element capable of measuring active energy (kWh). The meter measures and registers kWh up to class

1.0. accuracy. The metrology LED is incorporated into the optical port and pulses at a rate of 1,000 impulses per kWh for energy registration. All variants offer a test mode, which shows 3 decimal places and is reset when voltage is removed.

3.2 Anti-creep

Below starting current, the meter enters into an anti-creep mode. In this state the metrology LED is permanently lit and the registers do not increment. The LED remains lit until the meter current is increased in a forward direction beyond the starting current. The starting current is shown in the technical summary.

3.3 Meter Memory

All the meters data is to be recorded in a Ferroelectric Random Access

Memory (FRAM) under the control of the microprocessor. All the kWh registers are stored in the FRAM and will be updated periodically and on power-fail. The FRAM is able to be re-written throughout the life of the meter and will hold the information, if required for over twenty years.

3.4 Reverse / Export Energy registration

Three factory configurable reverse energy modes can be set as follows:

Export Energy Registration

A reverse / export energy register stores the value of kWh recorded by the meter in a reverse direction. The register may be configured as part of the display cycle of the meter. Alternately the register is held in memory and can be read from the meter via the IEC 1107 port. The Reverse energy register can be displayed with 0, 1 or 2 decimal places. Export energy will be recorded in the same way as forward (Import) flowing energy using identical starting currents etc.

F

A

B

E

D

C

Total Reverse

Reverse Energy Detection

A configurable option within the meter will alternate a warning message on the display should a fraud attempt be made by running current backwards



© Landis+Gyr

Page 10 of 21 Issue: 45 Operational Functions through the meter. The reverse energy warning message is triggered when the reverse power exceeds a programmable threshold level of between 1-

10 Amps for a period of 10Wh. Once this level is reached the message below will be displayed which can only be reset via the IEC 1107 port.

Whilst in this mode the LED will remain lit whilst there is reverse energy detected.

Reverse Energy Detection Message

Unidirectional Register

An optional requirement is to accumulate both import and export energy into the same register. Basically this will be the sum of adding both forward and reverse energy resisters. The register would be shown as the normal kWh display as below:

F

A

B

E

D

C

Total Display

No Power Read (option)

This allows the user to take meter readings when there is no mains electricity supply. This is achieved by installing a battery supply board that powers the meter. The user applies a magnet to the outside of the meter case and the meter powers up for 20 to 30 seconds. During this time the meter displays the sign on and then displays the energy registers.



User Interfaces Issue: 4 5 Page 11 of 21

4 User Interfaces

The inputs and outputs of the 5235

4.1 Register Displays

Single rate version -versions A & B

Single rate meters display the total kWh reading only. The display is configurable to show either whole numbers, 1 or 2 decimal places. The meter is also factory configurable to display either 5 or 6 digits with roll over to zero at 99999 or 999999.

Two-rate meter (external time switch) - D version only kWh are recorded at a particular rate and displayed using the rate enunciators on the left hand side of the display. The rate registers are displayed between 0 and a maximum of 2 decimal places unless configured to 3 decimal places of testing purposes via the optical port.

The rate register range is 00000.00

– 99999.99 kWh unless factory configured to six digits. The diagram shows a display sequence for a fourrate meter and total register below. In the two rate variant the meter may be configured to operate between 1 and 2 rates via the Optical port.

Rate 1 display. Flashing enunciator indicates active rate

F

A

B

E

D

C

Rate 2 Display

4.2 Pulsed Output (Option)

The type B meter has an optically isolated, voltage free open collector

Pulse Output that is configurable to between 1 and 1000 pulses per kWh.

To maximise operation with external monitoring devises, the pulse width can also be configured to between 20 and 260 mS in 20 mS steps.

Configuration is made through the IEC 1107 port.

The output meets IEC62053-31: 1998 Class B, Maximum voltage 15Vdc.

4.3 Switching inputs (D model)

The configuration is factory set allowing the meter to operate as a single or two rate meter. Rate switching is achieved by switching neutral or live to the input terminal. See wiring diagram for the D model.



© Landis+Gyr

Page 12 of 21 Issue: 45

5235D-L Live switching model

5235D-N Neutral switching model

User Interfaces



Installation Issue: 4 5 Page 13 of 21

5 Installation

Construction, Mounting and wiring of the 5235

5.1 Construction

The Credit Meter case meets the requirements of BS5685 and is manufactured from following materials: -

Meter Base: Flame Retardant and UV stabilised Polycarbonate

Meter Top: Flame Retardant and UV Stabilised Polycarbonate

Terminal Cover: Flame Retardant and UV Stabilised Polycarbonate

Terminals: Solid Brass extrusion, 8.3mm diameter with 2 screws

5.2 Meter fixing

The meter is mounted using the two fixing holes found either side of the terminal housing. To aid terminal cover sealing, the screw boss has four raised indicators that should be aligned against the indicator on the cover.

5.3 Wiring

Terminal arrangement conforms to BS5685, Part1, 1979. Wiring diagrams can be put onto the terminal covers of the meters.

Meter

Element

Supply

L

N

Meter type 5235 A and F

Meter

Element

Wh

L

N

Load

Supply

L

N

Meter type 5235 B

L

N

Load



© Landis+Gyr

Page 14 of 21 Issue: 45

Meter

Element

Supply

L

N

Meter type 5235 D - N

Meter

Element

Time switch

L

N

Load

Supply

L

N

Meter type 5235 D

– L

Time switch

L

N

Load

Installation



Technical Summary Issue: 4 5 Page 15 of 21

6 Technical Summary

The technical specifications of the 5235

6.1 Technical Summary

System Voltage Single element meters

Current (Base)

Current (Max)

Starting Current

Max measuring range

Measuring Accuracy

Burdens

Supply Frequency

Temperature Range

Meter Constant

Pulse output

Display

Quality

Ofgem approval number

Certificated life

Reference standards

Construction

Terminal arrangement

Terminal size

Weight

Dimensions (mm)

Supply variation

Voltage withstand

Direct connection Ib

Imax

240Vac Phase to Neutral




+15% to -20%

415V continuous

10kV impulse @105J

5A, 10A, or 20A

40A, 60A, 80A or 100A

(IEC)

IEC 62053-21

Voltage Circuit @ 230Vac

Current Circuit @ Ib

Nominal

Frequency Variation

Limit operating ranges

Storage range

0.4% of Ib

20mA up to 100A

Class 1 and 2

0.9W 7.7VA

0.1VA

50Hz or 60Hz

+/- 5%

-20°C to 55°C

-25°C to 70°C

1000 imp/kWh

The output meets IEC62053-31:

1998 Class B, Maximum voltage

15Vdc

Type

– 7 character, 7segment LCD

Character size

– 8



3.5 mm.

Manufactured to: ISO 9001:1994

986

20 years

IEC62052

– 11: 2003 & IEC62053 – 21:2003 Alternating current static watt-hour meters for active energy. (Classes 1 & 2)

BS5685: 1979: Part 1:Specification class 0.5, 1.0 and 2.0 Single phase and Polyphase, single rate and multi-rate watt-hour meters.

IEC62056

– 21: 2002.Data Exchange for Meter Reading, Tariff and Load

Control. Direct Local Exchange.

SI1566: 2003The Meters (Certification) Regulations 1990.

Flame Retardant and UV

Stabilised Polycarbonate

BS5685

Standard Terminal Cover

8.3 mm diameter.

304g

Extended Terminal Cover

Standard Terminal Cover

Extended Terminal Cover

338g

H 80 x W 125 x D 36

H 113 x W 126 x D 41



© Landis+Gyr

Page 16 of 21

6.2 Dimensions

Issue: 45 Technical Summary



Maintenance and Service Issue: 4 5 Page 17 of 21

7 Maintenance and Service

7.1 Meter Check

While it isn’t necessary, under normal circumstances, to perform any maintenance on the installed meter, the following are check points that should be observed during scheduled periodic meter visits.



Is the meter dry and clean, particularly the LCD display and the optical interface?



Does the meter display a legible and sensible display? i.e. does the meter appear in a serviceable condition.



Check all factory fitted and company fitted seals are in place secure and intact.



Observe display for any error messages or notifications



Confirm that the energy registers have changed to a reasonable degree since the last visit.



If irregularities are found, continue as in section 8.

7.2 Meter Testing

The testing of meters, either random sample or on all meters, should be carried out periodically according to national regulations. The meter must be removed as described in section 8.3 and replaced with a meter of similar type for the duration of the tests.

7.3 Post Installation Configuration Changes

With the aid of a laptop computer or other suitable hand held device a flag probe and Landis+Gyr specific software, it is possible to amend the factory configured options of the meter. It is beyond the scope of this manual to describe in any further detail the procedure. Landis+Gyr sales team would be happy to discuss specific requirements.



© Landis+Gyr

Page 18 of 21 Issue: 45 Measures in the Event of Faults

8 Measures in the Event of Faults

8.1 Operating Faults

If the LCD window is illegible or the data readout does not function, the following points should be checked.

Is the mains voltage present?

– Are the preliminary fuses intact?

Has the minimum or maximum recommended ambient temperature been exceeded?

Is the LCD window clear of all debris?

– Not misted over, painted over or soiled in any way.

If none of the above are causing the fault the meter should be disconnected as per section 8.2, replaced if required as detailed in section 5 and returned to Landis+Gyr as described in section 8.3.

8.2 Disconnecting the Meter

Remove preliminary fuses before continuing

The connecting conductors should not be Live when removing the meter.

Electrically Live parts are a life threatening hazard. Preliminary fuses should be removed and kept in a safe place until all work is complete, where they cannot be replaced by anyone unnoticed.

Proceed as follows:



Remove the company seal on the terminal cover (if fitted).



Release the two terminal cover screws and remove terminal cover.



Check with a suitable voltage testing device that the phase connections are not live. If they are live then remove the preliminary fuses and keep in a safe place until all work is complete, where they cannot be replaced by anyone unnoticed.



Remove the signal inputs and outputs by releasing the auxiliary terminal screws.



Remove the phase connections by releasing the main terminal screws.



If required fit a suitable replacement meter as described in section

5.

8.3 Repairing the Meter

There are no user serviceable parts inside the meter. Breaking factory calibration seals will invalidate the calibration status of the meter. In the event of a meter requiring repair, proceed as follows.



Remove the meter from the installation as detailed in section 8.2.



Attach a label, which describes the fault as accurately as possible, to the meter and include name and contact details of person responsible in case of inquiries.



Measures in the Event of Faults Issue: 4 5 Page 19 of 21



Package the meter to ensure no further damage can occur during transit.



Send the meter back to Landis+Gyr.



© Landis+Gyr

Page 20 of 21 Issue: 45 Decommissioning and Disposal

9 Decommissioning and Disposal

The procedure for the safe removal of the meter from the installation is described in section 8.3. Please ensure that ALL SAFETY PRECAUTIONS are met before proceeding.

Based on the environmental certificate ISO 14001, the components used to manufacture the meter can, in the main, be broken down into constituent parts and sent for suitable recycling or disposal.

The following are general guidelines and should NOT take priority over local disposal and environmental policies which should be adhered to without compromise.

Component Parts

Printed Circuit Boards

LCD Display

Metal Components

Plastic Components

Disposal

Treated as per disposal of Electronic Equipment

Sorted and delivered to collective recycling point

Sorted and delivered for re-granulation if at all possible



Glossary of Terms and Standards Issue: 4 5 Page 21 of 21

10 Glossary of Terms and Standards

10.1 Acronyms

10.2 Measurement Units

mO ms

Nm o

C

UN

UT

V

A

Hz

Iref

Kg kVAh kvarh kWh mm

Acronym

BS

DFS

DIN

ECD

EEPROM

IEC

ISO

LCD

LED

MD

MID

NPR

OFGEM

PTR

RED

Definition

British Standard

Direct Field Sensor

Deutsches Institut für Normung (German Institute For

Standardisation)

External Connection Diagram

Electrically Erasable Programmable Read Only Memory (E2)

International Electrotechnical Commission

International Standards Organisation

Liquid Crystal Display

Light Emitting Diode

Maximum Demand

Metering Industry Directive

No Power Read

The Office of Gas and Electricity Markets

Photo-transistor

Reverse Energy Detected

Ampere (unit of current)

Hertz (unit of frequency)

MID reference current

Kilogramme (unit of weight)

Kilo Volt Ampere hour kilo Volt Amps reactive hour kilo Watt-hour millimetre (unit of distance) milliohm (unit of resistance) millisecond

Newton meter (unit of torque)

Degree Celsius (unit of temperature)

Rated supply voltage of meter

Rated external switch voltage

Volt



© Landis+Gyr

5235 Single Phase Credit Meter

British Standard

5235 Single Phase Credit Meter

User Manual & Technical Specification

Revision History

Table of Contents

1 Introduction

2 Safety Information

3 Operational Functions

4 User Interfaces

5 Installation

6 Technical Summary

7 Maintenance and Service

8 Measures in the Event of Faults

9 Decommissioning and Disposal

10 Glossary of Terms and Standards

Related manuals

Table of contents

5235 Single Phase Credit Meter

British Standard

5235 Single Phase Credit Meter

User Manual & Technical Specification

Revision History

Table of Contents

1 Introduction

2 Safety Information

3 Operational Functions

4 User Interfaces

5 Installation

6 Technical Summary

7 Maintenance and Service

8 Measures in the Event of Faults

9 Decommissioning and Disposal

10 Glossary of Terms and Standards

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