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Statutory Instruments

1998 No. 1566

ELECTRICITY

The Meters (Certification) Regulations 1998

Made

24th June 1998

Coming into force

1st August 1998

The Director General of Electricity Supply, in exercise of the powers conferred by sections 31 and 60 of, and paragraphs 5(1) and 13(2) of Schedule 7 to, the Electricity Act 1989(3), and with the consent of the Secretary of State in accordance with paragraph 13 of Schedule 7 to the Act, hereby makes the following Regulations:—;

Citation and commencement

1.  These Regulations may be cited as the Meters (Certification) Regulations 1998 and shall come into force on 1st August 1998.

Interpretation

2.  (1)  In these Regulations—

“the Act” means the Electricity Act 1989;

“approved” means approved by or under regulations made under paragraph 2 of Schedule 7 to the Act;

“authorised examiner” means a person who is authorised in accordance with regulation 5;

“authorised manufacturer” means a person who is authorised in accordance with regulation 3;

“authorised repairer” means a person who is authorised in accordance with regulation 4;

“certification period” means, in the case of a meter of a type specified in columns 1 to 6 of Schedule 4, the period stated in relation thereto in column 7 of that Schedule and, in the case of any other meter, the period of 10 years, the period beginning in each case on the date on which the meter is certified for the purpose of the Act;

“directions” means any directions issued by the Director under paragraph 6(1) of Schedule 7 to the Act;

EEA Agreement” means the Agreement on the European Economic Area signed at Oporto on 2nd May 1992(4) as adjusted by the Protocol signed at Brussels on 17th March 1993(5);

“EEA State” means a state which, at the date of the entry into force of these Regulations, is a Contracting Party to the EEA Agreement;

“equivalent European provisions” has the meaning given by regulation 8;

“meter examiner” means a person appointed under paragraph 4 of Schedule 7 to the Act;

“permitted margins of error” means the margins of error referred to in regulation 7.

(2) Unless the context otherwise requires, any reference in these Regulations to a numbered regulation or Schedule is a reference to the regulation in or the Schedule to these Regulations bearing that number; any reference in a regulation or a Schedule to a numbered paragraph is a reference to the paragraph of that regulation or Schedule bearing that number; and any reference in a Schedule to a numbered table is a reference to the table bearing that number at the end of that Schedule.

Authorised manufacturer

3.  (1)  Any person who manufactures meters and satisfies the Director that—

(a)he owns or has available to him apparatus for the examination, testing and regulation of meters which complies with directions;

(b)he operates at a manufacturing unit a quality assurance system in respect of every meter manufactured by him at that unit which conforms to the standard contained in European Standard EN ISO 9001:1994(6) or to any standard, technical regulation, manufacturing method or code of practice accepted in other EEA States conformity with which will achieve an equivalent assurance of quality; and

(c)he would be capable of complying with the conditions set out in paragraph (2),

may be authorised by the Director for the purpose of these Regulations in respect of meters manufactured by him at that manufacturing unit for a period not exceeding three years but so that any authorisation may be renewed from time to time.

(2) An authorisation granted by the Director to a person who satisfies the provisions of paragraph (1) shall be subject to the following conditions—

(a)that the authorisation shall only apply in respect of meters which have been examined, tested and regulated using the apparatus referred to in sub-paragraph (a) of paragraph (1);

(b)that the authorised person shall operate at all times at each manufacturing unit a quality assurance system which conforms to the standard referred to in sub-paragraph (b) of paragraph (1) and shall maintain a record in permanent form of the system which he operates and of the actions taken to comply with that system in respect of the meter or meters which he intends to submit for certification in accordance with regulation 6;

(c)that the authorised person shall secure that each meter referred to in sub-paragraph (b) of this paragraph shall be examined and tested in accordance with the provisions of Schedule 1 or one of the equivalent European provisions;

(d)that the authorised person shall cause every meter in respect of which a certificate has been issued under regulation 7 or 9 to be so stored while it remains under his control and so packaged for delivery when it is to be dispatched from his control as to prevent, so far as reasonably practicable, damage which would cause it to operate in a manner which would not conform with the permitted margins of error;

(e)that the authorised person shall permit the Director or any persons authorised by him to have access to any manufacturing unit and to examine and test all apparatus and to inspect all records referred to in this paragraph at all reasonable times for the purpose of ensuring that the authorised person is complying with the conditions of his authorisation;

(f)that the authorised person shall comply with directions; and

(g)that the authorised person shall pay any fee payable by him in accordance with regulation 11.

(3) An authorisation under this regulation may be terminated at any time by the Director upon giving not less than 28 days notice to the authorised person if he is in breach of any condition of his authorisation and, in the case of a breach which is capable of being remedied, has failed to remedy that breach as soon as reasonably practicable after notice has been given to him by the Director specifying the breach.

(4) For the purpose of this regulation and Schedule 2—

(a)a person shall be treated as manufacturing a meter if he has caused the meter to be assembled so as to comply with the conditions of his authorisation but has not himself manufactured every component part of the meter;

(b)“assembled” includes the carrying out of repairs or modifications to a meter within a period of twelve months after the date upon which a certificate in respect of that meter was first issued under regulation 7 or 9; and

(c)“manufacturing unit” means premises specified to the Director in writing (which may identify the premises by reference to a plan) at which meters are manufactured but excludes any premises or that part of any premises which are used, otherwise than as provided in sub-paragraph (b), for the cleaning and repair of meters which have previously been used for measuring the quantity of electricity supplied.

Authorised repairer

4.  (1)  Any person who repairs meters and satisfies the Director that—

(a)he owns or has available to him apparatus for the examination, testing and regulation of meters which comply with directions;

(b)he operates at a repair unit a quality assurance system in respect of every meter repaired by him at that unit which conforms to the standard contained in European Standard EN ISO 9002:1994(7) or to any standard, technical regulation, manufacturing method or code of practice accepted in other EEA States conformity with which will achieve an equivalent assurance of quality; and

(c)he would be capable of complying with the conditions set out in paragraph (2),

may be authorised by the Director for the purpose of these Regulations in respect of meters repaired by him at that repair unit for a period not exceeding three years but so that any authorisation may be renewed from time to time.

(2) Any authorisation granted by the Director to a person who satisfies the provisions of paragraph (1) shall be subject to the following conditions—

(a)that the authorisation shall only apply in respect of meters which have been examined, tested and regulated using the apparatus referred to in sub-paragraph (a) of paragraph (1);

(b)that the authorised person shall operate at all times at each repair unit a quality assurance system which conforms to the standard referred to in sub-paragraph (b) of paragraph (1) and shall maintain a record in permanent form of the system which he operates and of the action taken to comply with that system in respect of the meter or meters which he intends to submit for certification in accordance with regulation 6;

(c)that the authorised person shall cause each meter which is repaired at a repair unit to be repaired to a standard and using such materials as would reasonably be expected to enable it to operate within the permitted margins of error for not less than the certification period;

(d)that the authorised person shall secure that each meter referred to in sub-paragraph (b) of this paragraph shall be examined and tested in accordance with the provisions of Schedule 1 or one of the equivalent European provisions;

(e)that the authorised person shall cause every meter in respect of which a certificate has been issued under regulation 7 or 9 to be so stored while it remains under his control and so packaged for delivery when it is to be dispatched from his control as to prevent, so far as reasonably practicable, damage which would cause it to operate in a manner which would not conform with the permitted margins of error;

(f)that the authorised person shall permit the Director or any person authorised by him to have access to any repair unit and to examine and test all apparatus and to inspect all records referred to in this paragraph at all reasonable times for the purpose of ensuring that the authorised person is complying with the conditions of his authorisation;

(g)that the authorised person shall comply with directions; and

(h)that the authorised person shall pay any fee payable by him in accordance with regulation 11.

(3) An authorisation under this regulation may be terminated at any time by the Director upon giving not less than 28 days notice to the authorised person if he is in breach of any condition of his authorisation and, in the case of a breach which is capable of being remedied, has failed to remedy that breach as soon as reasonably practicable after notice has been given to him by the Director specifying the breach.

(4) For the purpose of this regulation and Schedule 2 “repair unit” means premises specified to the Director in writing (which may identify the premises by reference to a plan) at which meters which have previously been used for measuring the quantity of electricity supplied are cleaned, repaired, tested or regulated but excluding any premises or that part of any premises which are used for the manufacture or assembly of meters.

Authorised examiner

5.  (1)  A public electricity supplier, an authorised manufacturer or an authorised repairer may nominate a person for the purpose of this regulation.

(2) If the Director is satisfied that a person nominated under paragraph (1) is competent to carry out the functions contained or referred to in regulation 7 the Director may authorise that person to be an examiner for the purpose of certifying meters for the purpose of the Act.

(3) A person authorised to be an examiner shall not be authorised to examine any meter which he has wholly or partly manufactured or repaired, or one which he has examined, tested or regulated in a capacity other than that of an examiner authorised under paragraph (2).

(4) An authorisation granted by the Director to a person who satisfies the provisions of paragraph (2) shall be subject to the following conditions—

(a)that the authorisation shall only apply in respect of meters which have been manufactured or repaired, as the case may be, by the person by whom he was nominated under paragraph (1);

(b)that, where regulation 9 applies, he shall examine and test not less than the number of meters selected in accordance with a sampling procedure determined by the Director having regard to national or international sampling procedures or plans;

(c)that he shall send to the Director not more than seven days after the expiry of each month a report stating the number of meters which have been submitted to him in accordance with regulation 6 and the number of meters in respect of which a certificate has been issued under regulation 7 or 9 during the preceding month; and

(d)that he shall retain a copy of each certificate issued by him for a period of not less than one year from the date of issue and shall produce the copy to the Director if requested to do so.

(5) An authorisation under this regulation may be terminated at any time by the Director upon giving not less than 28 days notice to the authorised person if—

(a)he is in breach of any condition of his authorisation and, in the case of a breach which is capable of being remedied, has failed to remedy that breach as soon as reasonably practicable after notice has been given to him by the Director specifying the breach;

(b)he fails to exercise proper care and attention in performing his functions under regulation 7 or 9; or

(c)he is unable, otherwise than temporarily, to perform his functions under regulation 7 or 9.

(6) Where—

(a)a person nominated under paragraph (1) and authorised under paragraph (2) is temporarily unable for any reason to act as an authorised examiner;

(b)the person by whom he was nominated has nominated another person under paragraph (1) who has been authorised under paragraph (2); and

(c)the person referred to in sub-paragraph (a) of this paragraph is again able to act as an authorised examiner,

the Director may give not less than 28 days notice in writing to the authorised person referred to in sub-paragraph (b) of this paragraph terminating his authorisation.

Application for certification

6.  (1)  A person who requires a meter to be certified for the purposes of the Act may submit the meter to an authorised examiner who is authorised to certify a meter submitted by that person, or to a meter examiner.

(2) Each meter which is submitted for certification in accordance with regulation 9 shall be accompanied by a report verified and signed by the person in charge of manufacture or repair, as the case may be, or by a person nominated by him.

(3) A report for the purpose of paragraph (2) shall contain the statements and information specified in Schedule 2 including, where that meter is designed to operate with a transformer, the statements and information relating to the transformer.

Procedure for certification

7.  (1)  Subject to regulation 9, a meter which is submitted to a meter examiner or an authorised examiner shall not be certified by him unless, in addition to being satisfied as required by paragraph 5(2)(a) of Schedule 7 to the Act that the meter is of an approved pattern or construction, he is satisfied—

(a)either that the meter has been tested in accordance with the provisions of Schedule 3, conforms to the standards described in that Schedule and can reasonably be expected to operate within the permitted margins of error for not less than the certification period, or that it has been tested in accordance with and conforms to one of the equivalent European provisions; and

(b)that it has been sealed in accordance with directions.

(2) The permitted margins of error shall be an error not exceeding plus 2.5 per cent. or minus 3.5 per cent. at any load at which the meter is designed to operate.

(3) Where the examiner is satisfied that a meter complies with paragraph (1), he shall issue a certificate of compliance specifying the serial number of the meter, and thereupon that meter shall be a meter certified for the purpose of the Act.

(4) Each certificate under paragraph (3) shall be numbered in the sequence in which it is issued.

Equivalent European provisions

8.  (1)  Equivalent European provisions are—

(a)the provisions as to verification in Council Directive 76/891/EEC(8) as amended by Commission Directive No. 82/621/EEC(9) and Protocol 1 and Part IX of Annex II to the EEA Agreement;

(b)European Standard EN 61036:1996(10); and

(c)any standard, technical regulation, manufacturing method or code of practice accepted by other EEA States conformity with which will ensure a level of precision, security, safety, durability and fitness for purpose equivalent to that assured by conformity to Schedule 3.

(2) A meter examiner or an authorised examiner to whom a meter has been submitted under regulation 6 shall take into account the results of the tests carried out by the bodies and laboratories of other EEA States where such bodies and laboratories conform with European Standard EN 45001:1989(11).

Batch certification

9.   Where—

(1)a number of meters have been submitted to a meter examiner or an authorised examiner at the same time by the same person;

(2)that person is a public electricity supplier, an authorised manufacturer or an authorised repairer;

(3)each meter is of an approved pattern or construction and is accompanied by the report referred to in regulation 6(2); and

(4)the examiner has examined and tested a sufficient number of the meters to satisfy himself that it provides a reasonable test of all of them,

he may issue a certificate in respect of all the meters so submitted to him specifying or identifying the serial number of each meter and including all the information contained in the report submitted under regulation 6(2) and thereupon each of those meters shall be a meter certified for the purpose of the Act.

Duration of certification

10.  A meter certified or deemed to be certified for the purpose of the Act shall cease to be so certified or deemed to be so certified—

(1)if the approval of the pattern or construction of the meter is revoked;

(2)if it is or becomes installed in a manner which is not an approved manner of installation;

(3)if any alteration is made to the meter;

(4)if the meter ceases to operate within the permitted margins of error;

(5)subject to paragraph (6), at the expiry of its certification period; or

(6)if the meter is of a type specified in columns 1 to 6 of Schedule 4 and is immediately before the coming into force of these Regulations certified for the purpose of the Act and the effect of paragraph (5) would be to cause the meter to cease to be certified sooner than if these Regulations had not been made, on the expiration of two years from the coming into force of these Regulations or at the expiry of the certification period, whichever is the later.

Fees

11.  (1)  Any person who submits a meter for certification under regulation 6 shall pay to the Director in accordance with paragraph (3)—

(a)in respect of each meter submitted for certification by a meter examiner a fee of 34 pence; or

(b)in respect of each meter submitted for certification by an authorised examiner a fee of 18 pence.

(2) A person who has submitted a meter to a meter examiner or an authorised examiner under regulation 6 shall, within seven days after the last day of each month in which he does so, deliver to the Director a statement of the number of meters which he has submitted during the preceding month.

(3) A person who has submitted the statement referred to in paragraph (2) shall, within thirty days of the delivery of the statement, pay to the Director a fee calculated in accordance with paragraph (1) in respect of the meters referred to in that statement.

Revocation

12.  The Meters (Certification) Order 1987(12) and the Meters (Certification) Regulations 1990(13) are revoked.

S. C. Littlechild,

Director General of Electricity Supply

2nd June 1998

I consent

John Battle,

Minister for Science, Energy and Industry,

Department of Trade and Industry

24th June 1998

Regulations 3(2)(c) and 4(2)(d)

SCHEDULE 1AUTHORISED MANUFACTURERS' AND AUTHORISED REPAIRERS'TESTS AND TESTING METHODS FOR ALTERNATING CURRENT WATTHOUR METERS

Pre-heating

1.  (1)  The following tests shall not be carried out until the voltage circuits of meters under test and the voltage circuits of working standard integrating meters have been energised for a period of one hour or half an hour if a current of not less than either 10 per cent. of basic current or 5 per cent. of marked current is applied to the current circuits of the meters, provided that the non-registration and starting current tests may be carried out during the pre-heating period.

(2) Sub-paragraph (1) shall not apply to a meter which the examiner is satisfied is capable of full operation as soon as it is energised.

Non-registration test

Induction meters

2.  (1)  Induction meters shall be tested to ensure that when the current circuits are open and a voltage of 110 per cent. of the declared system voltage is applied to the voltage circuits, rotors cease to rotate before completing one revolution.

Static meters

(2) Static meters shall be tested for non-registration by one of the following methods—

Accuracy tests

3.  (1)  Apparatus used for determining the errors of repaired meters during these tests shall comply with directions.

(2) The rate of advance of a meter over a test period shall be obtained by reading the electro-mechanical register or electronic display on or connected to the meter or by monitoring the rotation of the disc or pulse output of the meter.

(3) For any test load, the load applied to a working standard integrating meter shall not be less than 25 per cent. or more than 125 per cent. of its full load rating.

(4) For a working standard wattmeter, the applied load shall not be less than 40 per cent. or more than 100 per cent. of its full scale or range reading.

Methods of accuracy test

4.  The tests in table 2 shall be carried out by one of the following methods—

Reference conditions for all testing

5.  (1)  All tests shall be carried out under the reference conditions specified in table 1.

Meter position

(2) The meter position requirement given in table 1 applies to induction meters only. Tolerance applies to a horizontal reference line or edge on the meter, such as the lower edge of the terminal block.

Voltage and current supplies for polyphase meters

(3) When testing polyphase meters—

(a)the order of the phases shall correspond to the sequence shown on the connection diagram;

(b)the voltages shall be balanced so that the voltage between any line and neutral or between any two lines shall not differ by more than 1.5 per cent. from the mean of the corresponding voltages;

(c)the currents shall be balanced so that the current in any conductor shall not differ by more than 2.5 per cent. from the mean of these currents; and

(d)the phase displacement between the current and corresponding phase to neutral voltage shall not differ from other current and voltage phase displacements by more than 3 degrees at any power factor under any load conditions specified in table 2.

External magnetic induction

(4) The test given in table 1 in respect of external magnetic induction shall be carried out during commissioning or after major modification or refurbishing of a meter testing system. The test is carried out at 0.1 Ib unity power factor with the meters normally connected to determine the errors—

(a)for single phase meters, after reversing both current and voltage connections, for which half the difference between the two errors is the value of the variation;

(b)for polyphase meters, by making two additional measurements after each of the connections to the current circuits and to the voltage circuits are changed over 120 degrees but with the phase sequence unaltered, for which the greatest difference between each error determined and the mean of the three errors is the value of the variation.

Dial tests

(5) Where all the errors of repaired meters are determined by the method B or method C test, an additional test in accordance with method A shall be carried out. The method A test shall be carried out at one of the loads used for the method B or method C test. The error obtained by the method A test shall not differ by more than 0.6 per cent. from the error obtained at the same load value by the method B or method C test.

Duration of test

(6) The tests described in paragraph 4 shall continue until the error of meters can be calculated within a tolerance not greater than plus or minus 0.2 per cent.

Conditions for mixing methods of test

(7) The method A test may be used for intermediate and high loads, at unity power factor and at 0.5 power factor, and the method B or method C test for the low load, provided that an additional method B or method C test is carried out at one of the test load values used for the method A test.

Test loads

6.  (1)  Every repaired meter shall be tested at each of the loads specified in table 2, except that test number 2 in that table may be omitted.

(2) Every new meter shall be calibrated and tested at a sufficient number of load points so as to ensure that meter errors are not greater than the limits specified in paragraph 9.

(3) A test for starting shall also be carried out on new meters in accordance with test number 7 of table 2.

(4) The ratio errors shall be determined for voltage transformers that are intended for use with meters but are not tested with a meter.

(5) Current transformers intended for use with meters but not tested with a meter shall be tested from 5 per cent. to 120 per cent. of rated current.

Multi-register meters

Induction meters

7.  (1)  (a) All induction meters with more than one register shall be tested on one register in accordance with paragraphs 5 and 6 and on each and every other register at a low load using the method A, method B or method C test and at an intermediate or high load using the method A test.

(b)For the same load conditions the maximum permitted difference between the error on one register, expressed as a percentage, and the error on any other register, expressed as a percentage, is 1 per cent.

Static meters

(2) (a) All static meters with more than one register shall be tested on one register in accordance with paragraphs 5 and 6.

(b)For repaired static meters with more than one register—

(i)where the total units are the sum of all the registers, a further test shall be carried out on each and every other register using method A but

(ii)where the total units are recorded on one register, only that register is required to be tested in accordance with paragraphs 5 and 6.

Polyphase meters

8.  (1)  Every polyphase meter shall be tested on a circuit having a phase relationship for which that meter is designed, provided that three phase, four wire polyphase meters may be tested without current in the neutral conductor.

(2) Polyphase meters shall be tested by using —

(a)a polyphase kilowatt-hour energy standard;

(b)2 or 3 single phase kilowatt-hour energy standards; or

(c)2 or 3 single phase wattmeters.

Margins of error

9.  (1)  The error permitted for—

(a)single phase and polyphase whole current meters and

(b)single phase and polyphase transformer operated meters when tested with transformers connected

shall not exceed plus or minus 1.5 per cent. for test numbers 1, 2, 3 and 4 given in table 2.

(2) The error permitted for both single phase and polyphase transformer operated meters, when tested without transformers connected, shall not exceed plus or minus 1.0 per cent. for test numbers 1, 2, 3 and 4 given in table 2.

(3) The error permitted for polyphase whole current and transformer operated meters, when tested with transformers connected, shall not exceed plus 1.7 per cent. or minus 2.7 per cent. for test numbers 5 and 6 given in table 2.

(4) The error permitted for polyphase transformer operated meters, when tested without transformers connected, shall not exceed plus 1.2 per cent. or minus 2.2 per cent. for test numbers 5 and 6 given in table 2.

(5) Where current and voltage transformers are intended to be used with meters and are not tested connected to a meter then the error of the transformers at any load point throughout the rated range shall not exceed 0.5 per cent.

Insulation property test

10.  Each meter shall be tested to demonstrate that the insulation of the meter is of a sufficient standard to enable the meter to operate safely and correctly in the conditions in which it could reasonably be expected to be installed and operated.

TABLE 1

Influence quantitiesReference valueTolerance
Ambient temperatureReference temperature or, if not indicated, 23°C.>15°C to <30°C
Meter positionVertical±3°
VoltageReference voltage±1.5%
FrequencyReference frequency of 50Hz±0.5%
Voltage and current waveformSinusoidal formDistortion factor <5%
External magnetic induction at the reference frequency (paragraph 5(4))ZeroInduction value that does not produce a relative error variation of more than ±0.3%

TABLE 2

Test load in terms of marked current
Test number and loadPower factorBasic/maximumMaximum continuousLong rangeShort rangeMeter typePolyphase meter load
1 (high)1Imax100%100%–200% (Note 1)100%–125% (Note 1)Single and polyphaseBalanced
2 (intermediate)1Ib or 125%IbAny load between 25%–75% of the value specified for test number 1 (Note 1)Single and polyphaseBalanced
3 (low)15%Ib1.67% (Note 2)5%5%Single and polyphaseBalanced
4 (inductive)0.5 (Note 3)Ib or Imax100%The same value selected for test number 1Single and polyphaseBalanced
5 (element)1Ib100%The same value selected for test number 1PolyphaseOne phase loaded in turn
6 (inductive) (element)0.5 (Note 3)Ib100%The same value selected for test number 1PolyphaseOne phase loaded in turn
7 (starting-current)10.5%Ib to 1.0%Ib0.5% to 1.0%0.5% to 1.0%0.5% to 1.0%Single and polyphaseBalanced

Note 1 Where a range is given, any value within that inclusive range may be selected.

Regulation 6(3)

SCHEDULE 2REPORT ON METER TESTS

1.  In respect of each meter to which the report refers, a statement—

(1)that the meter referred to in the report is accurately described and as to whether it is a new or repaired meter;

(2)that the meter has been examined and tested in accordance with Schedule 1 or one of the equivalent European provisions;

(3)that the uncertainty of measurement was not greater than plus or minus 0.4 per cent. at unity power factor or greater than plus or minus 0.6 per cent. at 0.5 inductive power factor;

(4)that no meter error was greater than any error specified either in the relevant sub-paragraph of paragraph 9 of Schedule 1 or in one of the equivalent European provisions;

(5)that the meter did not register when energised on voltage only, whether with or without a current less than the threshold current; and

(6)as to whether paragraph 1(2) of Schedule 1 did or did not apply.

2.  In respect of each meter to which the report refers, the following information—

(1)the name of the person responsible for the manufacture or repair of the meter;

(2)the name and address of the manufacturing unit or the repair unit where the meter was examined and tested;

(3)the number of the report and any identification marks impressed on the meter seals in accordance with the provisions of directions;

(4)the declared system voltage on which the meter is to be used;

(5)the make and type of the meter, stating the nominal frequency if other than 50Hz;

(6)the marked current and voltage rating of the meter; and

(7)the serial number of the meter.

3.  A report may include the errors obtained at each test load and an end of test meter reading.

4.  In the case of a meter intended for use with and tested with a transformer or transformers, the following additional information—

(1)the make, output rating, serial number and classification of each transformer to be used with the meter;

(2)for a polyphase meter, the phase to which each transformer was connected; and

(3)particulars and electrical burdens of any other meter, instrument or external attachments that are to be used in conjunction with a transformer operated meter.

5.  Where a transformer intended for use with a meter has been tested, a statement—

(1)that the transformer referred to in the report is accurately described and as to whether it is a new or used transformer;

(2)that the transformer has been examined and tested in accordance with Schedule 1 or, in the case of a current transformer, with Harmonisation Document 553 S2(14) approved by the European Committee for Electrotechnical Standardization on 9th March 1993, or, in the case of a voltage transformer, with Harmonisation Document 554 S1(15) approved by that Committee on 24th March 1992;

(3)that the uncertainty of measurement was not greater than plus or minus 0.1 per cent; and

(4)that no transformer error was greater than plus or minus 0.5 per cent. at any load from 5 per cent. to 120 per cent. of full load when connected to the maximum rated burden or, if known, the working burden.

6.  In a report for a transformer, the following information—

(1)the name and address of the manufacturing unit or the repair unit where the transformer was examined and tested;

(2)the make and type of the transformer;

(3)the nominal frequency if other than 50Hz;

(4)the marked current or voltage ratio of the transformer and the working or maximum permissible burden that can be connected to the transformer; and

(5)the serial number of the transformer.

7.  The meter or transformer errors obtained at each test load may also be included on these reports.

8.  Before a meter is submitted for certification, the report on the meter and any transformer submitted with it shall be verified and signed by the person in charge of manufacture or repair, as the case may be, or by a person nominated by him.

Regulation 7(1)(a)

SCHEDULE 3CERTIFICATION TESTS AND TESTING METHODS FOR ALTERNATING CURRENT WATTHOUR METERS

Pre-heating

1.  (1)  The following tests shall not be carried out until the voltage circuits of meters under test and the voltage circuits of the working standard integrating meters have been energised for a period of one hour or half an hour if a current of not less than either 10 per cent. of basic current or 5 per cent. of marked current is applied to the current circuits of the meters, provided that the non-registration test may be carried out during the pre-heating period.

(2) Sub-paragraph (1) shall not apply to a meter which the examiner is satisfied is capable of full operation as soon as it is energised.

Non-registration test

Induction meters

2.  (1)  Induction meters shall be tested to ensure that when the current circuits are open and a voltage of 110 per cent. of the marked voltage is applied to the voltage circuits, rotors cease to rotate before completing one revolution.

Static meters

(2) Static meters shall be tested for non-registration by one of the following methods—

Method 1

(a)(i)When subjected to the test conditions specified in paragraph 2(1), the meter shall not emit more than one output pulse over the minimum test period determined in paragraph (ii);

(ii)the minimum test period shall be computed by the formula—

No math image to display

where

t

=

minimum test period

k

=

number of pulses per kWh emitted by the meter

m

=

number of elements

V

=

declared system voltage

Im

=

maximum current.

Method 2

(b)

When static meters are fitted with inhibiting circuits, they may be tested for non-registration with a current which is less than threshold current in respect of a meter of that type and at a voltage of 100 per cent. of the marked voltage of the meters under test. Meters shall not emit more than one output pulse over a minimum test period determined as follows—

No math image to display

where

t

=

minimum test period

V

=

declared system voltage

I

=

total current of all phases

k

=

number of pulses per kWh emitted by the meter

pf

=

power factor.

Accuracy tests

3.  (1)  Apparatus used for determining the errors of meters during these tests shall comply with directions.

(2) The rate of advance of a meter over a test period shall be obtained by reading the electro-mechanical register or electronic display on or connected to the meter or by monitoring the rotation of the disc or pulse output of the meter.

(3) For any test load applied to the meters under test, the load applied to a working standard integrating meter shall not be less than 25 per cent. or more than 125 per cent. of its full load rating.

(4) For a working standard wattmeter, the applied load shall not be less than 40 per cent. or more than 100 per cent. of its full scale or range reading.

Methods of accuracy test

4.  The tests in table 2 shall be carried out by one of the following methods—

Method A test

(1) A long period dial test where the advance of a kWh display, which is part of or connected to a meter under test, is compared with the advance of a precision kilowatt-hour meter;

Method B test

(2) A short period test where the rate of advance of a meter under test is compared to the rate of advance of a precision kilowatt-hour meter; or

Method C test

(3) A short period test where the actual rate of advance of a meter, when tested under constant power conditions over a specified test period, is compared to the calculated rate of advance for those conditions.

Reference conditions for all testing

5.  (1)  All tests shall be carried out under the reference conditions specified in table 1.

Ambient temperature

(2) Tests may be carried out at a temperature outside the temperature range given in table 1, but within the range 15 degrees centigrade to 30 degrees centigrade, provided that a correction is made in relation to the reference temperature by using the mean temperature co-efficient of the meters under test and the working standard meter(s) used for determining meter errors.

Meter position

(3) The meter position requirement given in table 1 applies to induction meters only. Tolerance applies to a horizontal reference line or edge on the meter, such as the lower edge of the terminal block.

Voltage and current supplies for polyphase meters

(4) When testing polyphase meters—

(a)the order of the phases shall correspond to the sequence shown on the connection diagram;

(b)the voltages shall be balanced so that the voltage between any line and neutral or between any two lines shall not differ by more than 1.5 per cent. from the mean of the corresponding voltages;

(c)the currents shall be balanced so that the current in any conductor shall not differ by more than 2.5 per cent. from the mean of these currents; and

(d)the phase displacement between the current and corresponding phase to neutral voltage shall not differ from other current and voltage phase displacements by more than 3 degrees at any power factor under any load condition specified in table 2.

External magnetic induction

(5) The test given in table 1 in respect of external magnetic induction shall be carried out during commissioning or after major modification or refurbishing of a meter testing system. The test is carried out at 0.1 Ib unity power factor with the meters normally connected to determine the errors—

(a)for single phase meters, after reversing both current and voltage connections, for which half the difference between the two errors is the value of the variation;

(b)for polyphase meters, by making two additional measurements after each of the connections to the current circuits and to the voltage circuits are changed over 120 degrees but with the phase sequence unaltered, for which the greatest difference between each error determined and the mean of the three errors is the value of the variation.

Dial tests

(6) Where all the errors of meters are determined by the method B or method C test, an additional test in accordance with method A shall be carried out. The method A test shall be carried out at one of the loads used for the method B or method C test. The error obtained by the method A test shall not differ by more than 0.6 per cent. from the error obtained at the same load value by the method B or method C test.

Duration of test

(7) The tests described in paragraph 4 shall continue until the error of meters can be calculated within a tolerance of not greater than plus or minus 0.2 per cent.

Conditions for mixing methods of test

(8) The method A test may be used for intermediate and high loads, at unity power factor and at 0.5 power factor, and the method B or method C test for the low load, provided that an additional method B or method C test is carried out at one of the test load values used for the method A test.

Test loads

6.  (1)  Every meter shall be tested at each of the loads specified in table 2.

(2) The ratio errors shall be determined for voltage transformers intended for use with meters but not tested with a meter.

(3) Current transformers intended for use with meters but not tested with a meter shall be tested from 5 per cent. to 120 per cent. of rated current.

Multi-register meters

Induction meters

7.  (1)  (a) All induction meters with more than one register shall be tested on one register in accordance with paragraphs 5 and 6 and on each and every other register at a low load using the method A, method B or method C test and at an intermediate or high load using the method A test.

(b)For the same load conditions the maximum permitted difference between the error on one register, expressed as a percentage, and the error on any other register, expressed as a percentage, is 1 per cent.

(c)Every register change mechanism shall be tested for correct operation with an applied voltage of 90 per cent. of the declared system voltage.

Static meters

(2) (a) All static meters with more than one register shall be tested on one register in accordance with paragraphs 5 and 6.

(b)On static meters with more than one register—

(i)where the total units are the sum of all the registers, a further test shall be carried out on each and every other register using method A but

(ii)where the total units are recorded on one register, only that register is required to be tested in accordance with paragraphs 5 and 6.

Polyphase meters

8.  (1)  Every polyphase meter shall be tested on a circuit having a phase relationship for which that meter is designed, provided that three phase, four wire polyphase meters may be tested without current in the neutral conductor.

(2) Polyphase meters shall be tested by using—

(a)a polyphase kilowatt-hour energy standard;

(b)2 or 3 single phase kilowatt-hour energy standards; or

(c)2 or 3 single phase wattmeters.

Margins of error

9.  (1)  The error permitted for—

(a)single phase and polyphase whole current meters and

(b)single phase and polyphase transformer operated meters when tested with transformers connected

shall not exceed plus or minus 1.9 per cent. for test numbers 1, 2, 3 and 4 in table 2.

(2) The error permitted for both single phase and polyphase transformer operated meters, when tested without transformers connected, shall not exceed plus or minus 1.4 per cent. for test numbers 1, 2, 3 and 4 given in table 2.

(3) The error permitted for polyphase whole current meters and transformer operated meters, when tested with transformers connected, shall not exceed plus 2 per cent. or minus 3 per cent. for test numbers 5 and 6 given in table 2.

(4) The error permitted for polyphase transformer operated meters, when tested without transformers connected, shall not exceed plus 1.5 per cent. or minus 2.5 per cent. for test numbers 5 and 6 given in table 2.

(5) Where current and voltage transformers are intended to be used with meters and are not tested connected to a meter then the error of the transformers at any load point throughout the rated range shall not exceed 0.5 per cent.

TABLE 1

Influence quantitiesReference valueTolerance
Ambient temperatureReference temperature or, if not indicated, 23°C.±2°
Meter positionVertical±3°
VoltageReference voltage±1.5%
FrequencyReference frequency of 50Hz±0.5%
Voltage and current waveformSinusoidal formDistortion factor <5%
External magnetic induction at the reference frequency (paragraph 5(5))ZeroInduction value that does not produce a relative error variation of more than ±0.3%

TABLE 2

Test load in terms of marked current
Test number and loadPower factorBasic/maximumMaximum continuousLong rangeShort rangeMeter typePolyphase meter load
1 (high)1Imax100%100%–200%(Note 1)100%–125% (Note 1)Single and polyphaseBalanced
2 (intermediate)1Ib or 125%IbAny load between 25%–75% of the value specified for test number 1 (Note 1)Single and polyphaseBalanced
3 (low)15%Ib1.67% (Note 2)5%5%Single and polyphaseBalanced
4 (inductive)0.5 (Note 3)Ib or Imax100%The same value selected for test number 1Single and polyphaseBalanced
5 (element)1Ib100%The same value selected for test number 1 Polyphase One phase loaded in turn
6 (inductive) (element)0.5 (Note 3)Ib100%The same value selected for test number 1PolyphaseOne phase loaded in turn

Note 1 Where a range is given, any value within that inclusive range may be selected.

Regulations 2(1) and 10(6)

SCHEDULE 4CERTIFICATION PERIODS

In the table below—

★ indicates that the meter is designed for use on a 1, 2 or 3 phase supply

@ indicates that the meter is designed for use on a 3 or 4 wire supply

# indicates that the meter is designed for use on a 2, 3 or 4 wire supply

MeterCertification
TypePhaseWireElementNumber of RegistersApproval NumberPeriod in Years
1234567
ABB
M81121Single84610
T81343Single84510
PM2332Multi88010
PM3@3Multi87910
Ampy
5028121Multi78910
5028L121Multi82010
5054122Multi82410
5054C122Multi81410
5056121Multi81710
5057@3Multi86610
5071121Multi85310
5077121Multi86010
Aron
eI121Single33415
eN121Single46515
G13132Single44215
G13P132Single44210
G23232Single44215
G23P232Single44210
G24242Single44215
G24P242Single44210
G33333Single44215
G33P332Single44210
G34343Single44215
G34P343Single44810
GM13132Single44815
GM13P132Single44810
GM23232Single44815
GM23P232Single44810
GM24242Single44815
GM24P242Single44810
GM33332Single44815
GM33P332Single44810
GM34343Single44815
GM34P343Single44810
GTM13132Single44815
GTM13P132Single44810
GTM23232Single44815
GTM23P232Single44810
GTM24242Single44815
GTM24P242Single44810
GTM33332Single44815
GTM33P332Single44810
GTM34343Single44815
GTM34P343Single44810
CEWE
2243332Multi84110
2343343Multi83910
3243332Multi84210
3343343Multi84010
CE332Single79610
CE332Single79110
CE343Single79510
CE343Single79010
Chamberlain & Hookham
K121Single33815
PT2@2Single46215
PT2D@2Single46210
PT4343Single46220
PT4D343Single46210
Dennis Ferranti
B1V7121Multi86410
TM3c121Single48120
EE/GEC
B31B121Single35815
C11B121Single60320
C11B–D121Single61510
C11B–D/M121Single61510
C11B–DR121Multi61510
C11B–DR/M121Multi61510
C11B–R121Multi61310
C11B–R/M121Multi61320
C11B/M121Single62725
C11B2121Single62820
C11B2–D121Single63710
C11B2–DR121Multi63710
C11B2–R121Multi62820
C11B2A121Single62820
C11B2A–R121Multi62815
C11B2C121Single63210
C11B2C–R121Multi63210
C11B3121Single84710
C11B3C121Single84810
C21B121Single57720
C21B–R121Multi58510
C21B–R/M121Multi58515
C21B/M121Single57720
C31B121Single50920
C31B–D121Single52410
C31B–D/M121Single52410
C31B–DR121Multi58010
C31B–DR/M121Multi58010
C31B–R121Multi50315
C31B–R/M121Multi50315
C31B/M121Single50925
CM1121Multi76410
CM2121Multi78310
CM4121Multi79310
CM5121Multi79410
CM6121Multi81210
CM7121Multi81310
D42B@2Single49415
D42B–D@2Single51010
D42B–D/M@2Single51010
D42B–DR@2Multi51010
D42B–DR/M@2Multi51010
D42B–R@2Multi50710
D42B–R/M@2Multi50710
D42B/M@2Single49415
D42BC@2Single57015
D42BC–D@2Single57010
D42BC–D/M@2Single57010
D42BC/M@2Single57015
D42F@2Single49715
D42F–D@2Single51010
D42F–D/M@2Single51010
D42F–DR@2Multi51010
D42F–DR/M@2Multi51010
D42F–R@2Multi50710
D42F–R/M@2Multi50710
D42F/M@2Single49715
D43B343Single49515
D43B–R343Multi49510
D43B–R/M343Multi49510
D43B/M343Single49515
D43F343Single54815
D43F/M343Single54815
E42B@2Single59015
E42B–D@2Single59210
E42B–D/M@2Single59210
E42B–DR@2Multi59410
E42B–DR/M@2Multi59410
E42B–R@2Multi59410
E42B–R/M@2Multi59410
E42B/M@2Single59015
E42B2@2Single64515
E42B2–D@2Single64910
E42B2–DR@2Multi65110
E42B2–R@2Multi64710
E42B3@2Single51015
E42B3–D@2Single51010
E42B3–DR@2Multi51010
E42B3–R@2Multi51010
E42B4@2Single51015
E42B4–D@2Single51010
E42B4–DR@2Multi51010
E42B4–R@2Multi51010
E42BC@2Single59715
E42BC–D@2Single60010
E42BC–D/M@2Single60010
E42BC/M@2Single59710
E42C–2D@2Single61910
E42C–2D/M@2Single61910
E42C–2DR@2Multi62010
E42C–2DR/M@2Multi62010
E42F@2Single60215
E42F–D@2Single62210
E42F–D/M@2Single62210
E42F–DR@2Multi62310
E42F–DR/M@2Multi62310
E42F–R@2Multi62310
E42F–R/M@2Multi62310
E42F3@2Single51015
E42F3–D@2Single51010
E42F3–DR@2Multi51010
E42F3–R@2Multi51010
E42F4@2Single51015
E42F4–D@2Single51010
E42F4–DR@2Multi51010
E42F4–R@2Multi51010
E43B343Single59115
E43B–D343Single59510
E43B–D/M343Single59515
E43B–DR343Multi59510
E43B–DR/M343Multi59510
E43B–R343Multi59510
E43B–R/M343Multi59510
E43B/M343Single59120
E43B2343Single64415
E43B2–D343Single64610
E43B2–DR343Multi64610
E43B2–R343Multi64610
E43B3343Single74915
E43B3–D343Single74910
E43B3–DR343Multi74910
E43B3–R343Multi59110
E43B4343Single74915
E43B4–D343Single74910
E43B4–DR343Multi74910
E43B4–R343Multi59110
E43C–2D343Single61710
E43C–2D/M343Single61710
E43C–2DR343Multi61810
E43C–2DR/M343Multi61810
E43F343Single62115
E43F–D343Single62310
E43F–DR343Multi62310
E43F–R343Multi62310
E43F3343Single74915
E43F3–D343Single74910
E43F3–DR343Multi74910
E43F3—R343Multi59110
E43F4343Single74915
E43F4–D343Single74910
E43F4–DR343Multi74910
E43F4–R343Multi74910
EP2332Multi84910
EP2J332Multi85010
EP3#3Multi85110
EP3J#3Multi85210
HA1121Single77310
HA1121Multi77310
LSA01–001343Single77110
LSA02–001343Single78610
LSA02–002343Single77210
PM1121Multi80010
PM2332Multi83210
PM3#3Multi83310
SC2B121Multi84310
TM1121Multi80910
TM2122Multi81010
UVE121Single31010
Ferranti/FML/Siemens
F2K–100121Single67720
F2K–100–2121Multi68115
F2K–100H–9121Single87110
F2K–100I121Single68820
F2K–100I–2121Multi68815
F2K–100L121Single68520
F2K–100L–2121Multi68515
F2K–11B121Single70320
F2K–11B–2121Multi71310
F2K–500121Single71010
F2K–500C121Single71710
F2K–500C–2121Multi71710
F2K–500C–9121Multi71710
F2K–500D121Multi73610
F2K–500D–2121Multi74310
F2K–500D–9121Multi74310
F2K–50B121Single70210
F2Q–100121Single63020
F2Q–10D121Single67210
F2Q–10W121Multi66810
F2Q–11B121Single63820
F2Q–11D121Single67310
F3K–100@2Single70515
F3K–100–2@2Multi70510
F3K–100I@2Single73015
F3K–100I-2@2Multi73010
F3K–100L@2Single70515
F3K–100L–2@2Multi72910
F3K–10B@2Single73415
F3K–10B–2@2Multi73410
F3K–11B@2Single73315
F3K–11B–2@2Multi73310
F3K–11BL@2Single73315
F3K–11BL–2@2Multi73315
F4K–100343Single69515
F4K–100–2343Multi70410
F4K–100I343Single73015
F4K–100I–2343Multi73010
F4K–100L343Single72915
F4K–100L–2343Multi72910
F4K–10B343Single71215
F4K–10B–2343Multi71210
F4K–10BI343Single73015
F4K–10BI–2343Multi73010
F4K–10BL343Single72915
F4K–10BL–2343Multi72910
F4K–11B343Single69615
F4K–11B–2343Multi70410
F4K–11BI343Single73015
F4K–11BI–2343Multi73010
F4K–11BL343Single72915
F4K–11BL–2343Multi72910
FM121Single32315
FMm121Single34215
FMMD121Single44310
FMmMD121Single44310
FMmP121Single36410
FMmP2121Single40210
FMmX343Single41515
FMmXT343Single41515
FMmY@2Single41415
FMmYT@2Single41415
FMP121Single35010
FMP2121Multi40610
FMQ121Single54920
FMT121Multi45510
FMX343Single41520
FMXa343Single48815
FMXaT343Multi51810
FMXMD343Single43410
FMXMDR2343Multi66710
FMXT343Multi45710
FMY @2Single41415
FMYMDR2@2Multi66710
FN12121Single52720
FN12D121Single55310
FN12P121Single53510
FN12PF121Single53610
FN12Q121Single52820
FN12QD121Single57910
FN12QP121Single54110
FN12QPF121Single54210
FN12R2121Multi54910
FN33@2Single54015
FN33D@2Single66610
FN33Q@2Single54015
FN33QR2@2Multi55210
FN33R2@2Multi55210
FN34343Single53815
FN34D343Single55410
FN34DR2343Multi66610
FN34Q343Single54515
FN34QD343Single55410
FN34QR2343Multi53810
FN34R2343Multi55110
FNA33@2Single58915
FNA33D@2Single56010
FNA33Q@2Single58915
FNA33QR2@2Multi58910
FNA33R2@2Multi58910
FNA34343Single54515
FNA34D343Single56010
FNA34Q343Single54520
FNA34QD343Single60610
FNA34QR2343Multi55110
FNA34R2343Multi54310
FNAB33@2Single65615
FNAB33D@2Single65910
FNAB33Q@2Single65615
FNAB33QR2@2Multi65710
FNAB33R2@2Multi65710
FNAB34343Single65215
FNAB34D343Single65910
FNAB34Q343Single65220
FNAB34QD343Single65910
FNAB34QR2343Multi65215
FNAB34R2343Multi65310
FNE12121Single52720
FNE12D121Single55310
FNE12P121Single53510
FNE12PF121Single53610
FNE12Q121Single52820
FNE12QD121Single57910
FNE12QP121Single54110
FNE12QPF121Single54210
FNE12QR2121Multi55010
FNE12R2121Multi55010
FNE33@2Single54015
FNE33D@2Single55410
FNE33Q@2Single54015
FNE33QD@2Single55410
FNE33QR2@2Multi55210
FNE33R2@2Multi55210
FNE34343Single53815
FNE34D343Single55410
FNE34Q343Single54515
FNE34QD343Single55410
FNE34QR2343Multi55110
FNE34R2343Multi55110
FNEA33@2Single54315
FNEA33D@2Single56010
FNEA33Q@2Single54315
FNEA33QD@2Single56010
FNEA33QR2@2Multi58910
FNEA33R2@2Multi58910
FNEA34343Single54315
FNEA34D343Single56010
FNEA34Q343Single54515
FNEA34QD343Single56010
FNEA34QR2343Multi55110
FNEA34R2343Multi55110
FNN2121Single57420
FNN2Q121Single57425
FNN2QC121Single68920
FNN2QD121Single62610
FPQ–102121Single63910
Q4N@3Multi88510
S2A–100121Multi86210
S2A–200121Single87010
S2AS121Multi88710
S2S–500A1121Single75410
S2S–500A2121Multi75410
S2S–600A121Multi76210
S2S–601A121Multi82710
S2S–700A121Multi75810
S2S–720A121Multi85610
S2S–730A122Multi85710
S4S–100RP343Multi80510
S4S–11BP343Multi78710
S4S–11BRP343Multi78710
Ganz
GE24121Single76010
GH42343Single76110
Horstmann
NU 076121Multi83610
NU 076 2122Multi83710
NU070121Multi80310
NU070 2122Multi80310
NU077–1121Multi87310
NU077–2122Multi87410
Iskra
E89E2121Single76610
E89ED2121Multi76710
E96E2121Single80810
T31AT2343Single76910
T31ATD2343Multi77010
T37E2343Single78010
TE33332Multi88110
TE44@3Multi88210
Landis & Gyr
CF6121Single51115
CH1121Single46620
CH1d121Multi46610
CL127121Single67520
CL127d121Multi67510
CL147121Single68620
CL147d121Multi68715
CL17121Single50820
CL17d121Multi50810
CL27121Single53325
CL27.1121Single57525
CL27.1d121Multi57510
CL27.2121Single61425
CL27.2d121Multi61420
CL27d121Multi53320
CL28121Single54620
CL28d121Multi54610
CL7121Single46325
CL7d121Multi46315
CM147121Single73520
CM147d121Multi73510
CM147dk10121Multi73710
CM147k10121Single73710
DF3@2Single47515
DF34@2Single51515
DF34dm@2Multi51510
DF3d@2Multi47510
FF10332Single81110
FF34@2Single51515
HF3@2Single47515
HF34@2Single51510
HF34dm@2Single51510
HF3d@2Multi44110
MF10343Single81110
MF3343Single42515
MF34343Single51515
MF34dm343Multi51610
MF3d343Multi42515
MH1343Single47910
MH1dm343Multi47910
ML240343Multi83110
ML240xtf3343Multi83110
VL11@2Single58815
VL11.5@2Single58815
VL11.5d@2Multi58810
VL11101332Single81110
VL11d@2Multi58810
VL122@2Single65415
VL122d@2Multi65410
VL123c>★@2Single65415
VL123d@2Multi65410
VL124@2Single65415
VL124d@2Multi65410
VL125@2Single65415
VL125dm@2Multi65410
YL1343Single52515
YL11343Single53120
YL11101343Single81110
YL11d343Multi53215
YL11dm343Multi53210
YL120343Single65415
YL120dm343Multi65410
YL121343Single65415
YL121d343Multi65415
YL1d343Multi52510
ZCA405121Single79910
ZCB120121Single75710
ZCB120d121Multi75710
ZCB127121Multi78110
ZCB127122Multi78210
ZCB220K121Single82210
ZCB221K121Multi88410
ZFA405332Single79710
ZMA405343Single79810
ZMB120K343Multi87210
ZMB127#3Single78810
ZMB127d#3Multi78810
Met Vick & AEI
NF5121Single40920
NQ121Single49320
NQ/M121Single53020
PRI/SIFAM
CALMU C3D343Multi75010
CALMU C3D+343Multi85410
CALMU C3T#3Multi75110
CALMU C3T+#3Multi83410
CALMU C3TV332Multi75210
CALMU C3V+332Multi83510
P3TA23343Multi89110
S3DXP410343Multi88610
Sangamo/Schlumberger
CBA121Multi74710
FX221121Single75610
H10121Single80610
HMT121Single34615
KBA121Multi74510
KBB121Single81610
KBC121Single86310
KXB121Multi86110
MBA343Multi83810
MTA121Multi77410
MTB121Multi87510
MTN121Multi80410
P5A332Multi86910
P5A@3Multi86810
P6A@3Multi86710
PIA@3Multi88610
PPA–1343Multi76310
PPA–2343Multi76510
PPB@3Multi85810
PXA332Multi80210
PXA343Multi77910
S200.13121Single45420
S200.16121Single48225
S200.28121Single57220
S200.30121Single55720
S200.31121Single68325
S200.32121Single58225
S200.33121Single58320
S200.38121Single57325
S200.4121Single43620
S200.7121Single43620
S203.1343Single51915
S204.16121Single49615
S204.7121Multi49615
S206.16121Single49210
S206.7121Single49210
S207.2121Single51410
S207.4121Single51410
S210121Single84410
S220121Single87610
S29.12@2Single45015
S29.13343Single45115
S29.14@2Single45015
S29.15343Single45015
S29.2@2Single35315
S29.3343Single35415
S300.1@2Single58715
S300.3@2Single64015
S301.1343Single56315
S301.6343Single56320
S301.9343Single64115
S304121Single56110
S304.1121Single56110
S304.10121Single61210
S304.11121Single61210
S304.2121Single56110
S304.4121Single56110
S304.5121Single56110
S304.50121Single68010
S304.51121Single69910
S304.60121Single71410
S304.61121Single71410
S304.9121Single56710
S309.1121Multi56815
S309.2121Multi58420
S309.3121Multi58420
S309.5121Multi72120
S320.1343Single67015
S320.1343Multi67010
S320.4343Single67115
S320.7343Single67415
S320.7343Multi67410
S320.75@2Multi67910
S321.1343Single58615
S321.6343Single58620
S321.9343Single64215
S322.12343Single66310
S322.15343Single66410
S322.6343Single63310
S322.9343Single63310
S323.1343Multi60710
S323.12343Multi66010
S323.6343Multi60710
S323.9343Multi66510
S325.3@2Single64315
S326.1@2Single63410
S326.6@2Single66510
S326.9@2Single66910
S327.3@2Multi66110
S327.6@2Multi66210
S330.1343Multi69110
SBB121Single82310
SPA01121Single72810
SPA02121Multi72810
SPA03121Multi73110
SPA11121Single72810
SPA13121Multi73110
SPB121Single85510
SPC121Multi86510
SPX121Single82110
ST—Q220343Multi77510
ST—Q230343Multi79210
TRA122Multi76810
TRX122Multi82510
Smith
AM121Single34815
APJ121Single61110
APM121Single36110
APNE121Single56410
APNEQ121Single56410
APQ121Single61110
Jugmera
EE 3000 M121Single85910

Explanatory Note

(This note is not part of the Regulations)

These Regulations set out the procedure for enabling meters, other than meters deemed to be certified under the measuring Instruments (EC Requirements) (Electrical Energy Meters) Regulations 1995 (S.I. 1995/2607), used for the purpose of measuring the quantity of electricity supplied to customers to be certified and provide for the circumstances in which certification and deemed certification are terminated. They consolidate with amendments the Meters (Certification) Order 1987 (S.I. 1987/730) and the Meters (Certification) Regulations 1990 (S.I. 1990/792). In addition to minor and drafting amendments, they make the following amendments of substance—

Provisions have been omitted that a certificate signed by an examiner is conclusive evidence of certification; that a copy of a certificate signed by an examiner is sufficient evidence; and that a meter ceases to be certified if it is moved.

The provisions requiring the recognition of European Standards have been extended to cover standards accepted in EEA States to reflect the effect of article 11 of the Agreement on the European Economic Area signed at Oporto on 2nd May 1992 (OJ No. L1, 3.1.94, p.1), as itself amended by the Protocol adjusting that Agreement signed at Brussels on 17th March 1993 (OJ No. L1, 3.1.94, p.572) (regulations 2(1), 3(1)(b), 4(1)(b), 8(1) and 8(2)).

These Regulations were notified in draft to the European Commission in accordance with Council Directive 83/189/EEC (OJ No. L109, 26.4.83, p.8) (as amended by Council Directive 88/182/EEC (OJ No. L81, 26.3.88, p.75) and Council Directive 94/10/EC (OJ No. L100, 19.4.94, p.100)).

Attention is drawn to the provisions of the Measuring Instruments (EC Requirements) (Electrical Energy Meters) Regulations 1995, the effect of which is to ensure that, for the purpose of Schedule 7 to the Electricity Act 1989, instruments bearing the mark of EC initial verification are treated in the same way as instruments certified under these Regulations.

Copies of European Standards EN ISO 9001: 1994 (referred to in regulation 3(1)(b)), EN ISO 9002: 1994 (referred to in regulation 4(1)(b)), EN 61036: 1996 (referred to in regulation 8(1)(b)), EN 45001: 1989 (referred to in regulation 8(2)) and Harmonisation Documents 553 S2 and 554 S1 (referred to in paragraph 5(2) of Schedule 2) may be obtained from the British Standards Institution at 389 Chiswick High Road, London W4 4AL.

A compliance cost assessment of the effect of this instrument on the cost of business is available from the Office of Electricity Regulation, Hagley House, Hagley Road, Edgbaston, Birmingham B16 8QG. Copies have been placed in the libraries of both Houses of Parliament.

(1)

See paragraph 11(3) of Schedule 17 to the Electricity Act 1989 (c. 29).

(2)

See the definitions of “prescribed” and “regulations”.

(3)

1989 c. 29; Schedule 7 was modified by the Measuring Instruments (EC Requirements) (Electrical Energy Meters) Regulations 1995 (S.I. 1995/2607).

(4)

OJ No. L1, 3.1.94, p.1.

(5)

OJ No. L1, 3.1.94, p.572.

(6)

EN ISO 9001:1994, which has the status of a British Standard, is a European Standard entitled “Quality Systems. Model for quality assurance in design, development, production, installation and servicing” and is published by the British Standards Institution.

(7)

EN ISO 9002:1994, which has the status of a British Standard, is a European Standard entitled “Quality Systems. Model for quality assurance in production, installation and servicing” and is published by the British Standards Institution.

(8)

OJ No. L336, 4.12.76, p.30.

(9)

OJ No. L252, 27.8.82, p.1.

(10)

EN 61036:1996, which has the status of a British Standard, is a European Standard entitled “Alternating current static watt-hour meters for active energy (classes 1 and 2)” and is published by the British Standards Institution.

(11)

EN 45001:1989, which has the status of a British Standard, is a European Standard entitled “General criteria for the operation of testing laboratories” and is published by the British Standards Institution.

(12)

S.I. 1987/730

(13)

S.I. 1990/792

(14)

Harmonisation Document 553 S2 is entitled “Current Transformers” and is published by the British Standards Institution.

(15)

Harmonisation Document 554 S1 is entitled “Voltage Transformers” and is published by the British Standards Institution.