Citation and commencement_I1

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

Interpretation_I2

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;

[^F1 “ the Authority ” means the Gas and Electricity Markets Authority; ^F1]

“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[^F2 , but does not include the United Kingdom ^F2] ;

“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;

[^F3 “nominated laboratory” means a laboratory nominated by the Authority for the purpose of testing meters; ^F3] and

“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

[^F4 3.—(1) Any person who manufactures meters and satisfies the Authority 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 9001:2000 or to any standard, technical regulation, manufacturing method or code of practice accepted in ^F5... 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 (7),

and, if, at the point of authorisation, paragraph (3) applies, that his proposals for audit are such as would, if implemented, meet the minimum requirements for audit set out in paragraph (4), may, upon payment of the appropriate fee, be authorised by the Authority for the purpose of these regulations for a period not exceeding three years in respect of meters manufactured by him at that unit.

(2) Any such authorisation as is mentioned in paragraph (1) may, from time to time, if the authorised person so requests and for so long as the Authority remains satisfied as to the matters described there, be renewed for a further period not exceeding three years by the Authority.

(3) This paragraph applies if the person intends to make arrangements for audit to be carried out otherwise than by the Authority.

(4) The minimum requirements for audit are:

(a)the audit shall be carried out by a nominated laboratory or a meter examiner;

(b)a nominated laboratory carrying out an audit shall be permitted at least the same level of access as the Authority is to be permitted under paragraph (7)(e);

(c)in the course of any period of three months, all relevant apparatus, processes, systems and records shall be submitted to audit;

(d)the nominated laboratory or, as the case may be, meter examiner shall make their report of each audit directly to the Authority at the same time as they report to the authorised person;

(e)every report shall be made within 14 days of completion of the audit to which it relates.

(5) Without prejudice to other means open to the Authority to satisfy itself as to the matters contained in paragraph (1)(a) to (c), the Authority may be satisfied as to those matters on the basis of a report by a nominated laboratory which concludes that the requirements of each of sub-paragraphs (a) to (c) are met in relation to the person seeking authorisation.

Provided that the report in question is not more than three months old at the point at which the request for authorisation is made.

(6) A person to whom paragraph (3) did not apply at the point of authorisation who subsequently forms an intention to make arrangements to which that paragraph refers shall inform the Authority of his proposals in such manner as the Authority may direct.

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

(a)that the authorisation shall apply only 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 in 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 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 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 Authority, a meter examiner or any person acting on behalf of the Authority 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 where the authorised person has made arrangements for audit to be carried out otherwise than by the Authority and either—

(i)those arrangements have ceased; or

(ii)no audit has taken place under the arrangements for a period of three months; or

(iii)he proposes that the arrangements be modified in any material respect

the authorised person shall inform the Authority immediately, giving reasons in any case and, in the case of (iii), an account of the proposed modifications in such manner as the Authority may direct.

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

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

(8) In the case of proposals made in pursuance of paragraph (6) or of information provided pursuant to paragraph (7)(f)(iii), the Authority shall, within 28 days of being informed of them, notify the authorised person of its view as to whether the requirements of paragraph (4) would be met by such arrangements.

(9) An authorisation under this regulation may be terminated in accordance with paragraph (11) at any time by the Authority if in the reasonable opinion of the Authority the authorised person is in breach of any condition of his authorisation and—

(a)the Authority has notified the authorised person of the breach;

(b)in the case of a breach which is, in the opinion of the Authority, capable of being remedied, the authorised person has refused or failed within a reasonable time to remedy that breach after notice has been given to him by the Authority notifying of the breach; and

(c)the period specified in paragraph (10) has expired.

(10) The period for the purposes of paragraph (9) is, as the case may be, 28 days,—

(a)in a case to which paragraph (9)(b) applies, from the date on which the Authority notifies the authorised person of its opinion that the authorised person has refused or failed within a reasonable time to remedy the breach;

(b)in any other case, from the date on which the Authority notified the breach.

(11) Termination of authorisation shall be effected by notice in writing by the Authority served upon the authorised person.

(12) For the purposes of this regulation and Schedule 2—

(a)a person may be treated as having manufactured a meter not withstanding that he has not himself manufactured every component part of that meter provided he has assembled 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;

(c) “audit” means an audit of the apparatus, processes, systems (including quality assurance systems) and records available, utilised operated or maintained by the authorised person in connection with his activities as an authorised person under this regulation;

(d) “inspection” means an inspection to ascertain compliance with any conditions of authorisation and includes any monitoring of directions issued by the Authority ;

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

(13) Nothing in this regulation shall have effect so as to prevent the Authority at any time or in any case carrying out or procuring an audit or an inspection in connection with the performance of its functions under this regulation or charging the requisite fee for so doing.^F4]

Authorised repairer

[^F6 4.—(1) Any person who repairs meters and satisfies the Authority 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 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 9001:2000 or to any standard, technical regulation, manufacturing method or code of practice accepted in ^F7... 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 (7),

and, if, at the point of authorisation, paragraph (3) applies, that his proposals for audit are such as would, if implemented, meet the minimum requirements for audit set out in paragraph (4), may, upon payment of the appropriate fee, be authorised by the Authority for the purpose of these regulations for a period not exceeding three years in respect of meters repaired by him at that unit.

(2) Any such authorisation as is mentioned in paragraph (1) may, from time to time, if the authorised person so requests and for so long as the Authority remains satisfied as to the matters described there, be renewed for a further period not exceeding three years by the Authority.

(3) This paragraph applies if the person intends to make arrangements for audit to be carried out otherwise than by the Authority.

(4) The minimum requirements for audit are:

(a)the audit shall be carried out by a nominated laboratory or a meter examiner;

(b)a nominated laboratory carrying out an audit shall be permitted at least the same level of access as is to be permitted the Authority under paragraph (7)(f);

(c)in the course of any period of three months, all relevant apparatus, processes, systems and records shall be submitted to audit;

(d)the nominated laboratory or, as the case may be, meter examiner shall make their report of each audit directly to the Authority at the same time as they report to the authorised person;

(e)every report shall be made within 14 days of completion of the audit to which it relates.

(5) Without prejudice to other means open to the Authority to satisfy itself as to the matters contained in paragraph (1)(a) to (c), the Authority may be satisfied as to those matters on the basis of a report by a nominated laboratory which concludes that the requirements of each of sub-paragraphs (a) to (c) are met in relation to the person seeking authorisation.

Provided that the report in question is not more than three months old at the point at which the request for authorisation is made.

(6) A person to whom paragraph (3) did not apply at the point of authorisation who subsequently forms an intention to make arrangements to which that paragraph refers shall inform the Authority of his proposals in such manner as the Authority may direct.

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

(a)that the authorisation shall apply only 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 in 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 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 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 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 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 Authority, a meter examiner or any person acting on behalf of the Authority 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;

(g)that where the authorised person has made arrangements for audit to be carried out otherwise than by the Authority and either—

(i)those arrangements have ceased; or

(ii)no audit has taken place under the arrangements for a period of three months; or

(iii)he proposes that the arrangements be modified in any material respect

the authorised person shall inform the Authority immediately, giving reasons in any case and, in the case of (iii), an account of the proposed modifications in such manner as the Authority may direct.

(h)that the authorised person shall comply with directions;

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

(8) In the case of proposals made in pursuance of paragraph (6) or of information provided pursuant to paragraph (7)(g)(iii), the Authority shall, within 28 days of being informed of them, notify the authorised person of its view as to whether the requirements of paragraph (4) would be met by such arrangements.

(9) An authorisation under this regulation may be terminated in accordance with paragraph (11) at any time by the Authority if in the reasonable opinion of the Authority the authorised person is in breach of any condition of his authorisation and—

(a)the Authority has notified the authorised person of the breach;

(b)in the case of a breach which is, in the opinion of the Authority, capable of being remedied, the authorised person has refused or failed within a reasonable time to remedy that breach after notice has been given to him by the Authority notifying of the breach; and

(c)the period specified in paragraph (10) has expired.

(10) The period for the purposes of paragraph (9) is, as the case may be, 28 days,—

(a)in a case to which paragraph (9)(b) applies, from the date on which the Authority notifies the authorised person of its opinion that the authorised person has refused or failed within a reasonable time to remedy the breach;

(b)in any other case, from the date on which the Authority notified the breach.

(11) Termination of authorisation shall be effected by notice in writing by the Authority served upon the authorised person.

(12) For the purposes of this regulation and Schedule 2—

“(a)“audit” means an audit of the apparatus, processes, systems (including quality assurance systems) and records available, utilised operated or maintained by the authorised person in connection with his activities as an authorised person under this regulation;

(b)“inspection” means an inspection to ascertain compliance with any conditions of authorisation and includes any monitoring of directions issued by the Authority; and

(c)“repair unit” means premises specified to the Authority 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 which are used for the manufacture or assembly of meters.”

(13) Nothing in this regulation shall have effect so as to prevent the Authority at any time or in any case carrying out or procuring an audit or an inspection in connection with the performance of its functions under this regulation or charging the requisite fee for so doing.^F6]

Authorised examiner

[^F8 5.—(1) If the Authority is satisfied that a person is competent to carry out the functions contained in or referred to in regulation 7, the Authority may authorise that person to be an examiner for the purpose of the Act.

(2) An authorisation under paragraph (1) may be general or may be limited to one or more descriptions of meters, according to the Authority’s determination of the competence of the person authorised and once given may be modified in the light of further evidence of competence.

(3) An authorisation granted by the Authority under paragraph (1) shall be subject to the following conditions:—

(a)that the authorised examiner shall only certify meters in the following circumstances—

(i)if he is employed by an electricity supplier and a meter is submitted to him for certification by that supplier;

(ii)if he is employed by an authorised manufacturer or authorised repairer and a meter has been manufactured by, or, as the case may be, repaired by, and is submitted to him for certification by, that manufacturer or repairer;

(iii)if he is employed by a nominated laboratory, and a meter is submitted for certification to the nominated laboratory;

(b)in the case of an authorised examiner whose authorisation is limited pursuant to paragraph (2), that he shall not certify any meter not falling within the description of meters for which he has been authorised.

(c)that he shall not certify any meter which he has wholly or partly manufactured or repaired or one which he has examined, tested or regulated in any capacity other than that of authorised examiner;

(d)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 Authority having regard to national or international sampling procedures or plans;

(e)that he shall send to the Authority 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;

(f)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 Authority if requested to do so;

(g)that he shall take all reasonable steps to maintain his competence to carry out the functions in respect of which he has been authorised;

(h)that he shall exercise proper care and attention at all times in performing his functions under regulation 7 or 9.

(4) An authorisation granted by the Authority under this regulation may be terminated in accordance with paragraphs (9) to (11) at any time by the Authority if in the reasonable opinion of the Authority any of the circumstances of paragraphs (5) to (7) applies in his case.

(5) The authorised examiner is in breach of any condition of his authorisation and—

(a)the Authority has notified the authorised examiner of the breach;

(b)in the case of a breach which is, in the opinion of the Authority, capable of being remedied, the authorised person has refused or failed within a reasonable time to remedy that breach after notice has been given to him by the Authority notifying of the breach; and

(c)the period specified in paragraph (8) has expired.

(6) In the reasonably held opinion of the Authority the authorised examiner is no longer competent to carry our the functions for which he has been authorised.

(7) The authorised examiner has not, for a period of one year performed the functions for which he has been authorised and there is no reason to believe that he will do so within the next following period of 3 months.

(8) The period for the purposes of paragraph (5) is, as the case may be, 28 days,—

(a)in a case to which paragraph (5)(b) applies, from the date on which the Authority notifies the authorised examiner of its opinion that the authorised examiner has refused or failed within a reasonable time to remedy the breach;

(b)in any other case, from the date on which the Authority notified the breach.

(9) Termination of authorisation shall be effected by notice in writing by the Authority served upon the authorised examiner.

(10) The Authority shall not terminate an authorisation in the circumstances of paragraph (6) or (7) until it has served notice on the authorised examiner of its intention and the ground on which it proposes to act and provided him with a reasonable opportunity to be heard, and in any event until a period of 28 days has expired since the service of the notice.

(11) The Authority shall take account of all representations received before exercising the power of termination.^F8]

Application for certification_I3

6.[^F9—(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 of that description, to a nominated laboratory or to a meter examiner.^F9]

[^F10 (1A) A nominated laboratory to which a meter is submitted under paragraph (1) shall direct either—

(a)a meter examiner; or

(b)an authorised examiner

who is in the employ of the laboratory to carry out the procedures provided for under regulations 7 and 9; and those regulations and regulation 8 shall apply as if the meter in question had been submitted to the meter examiner or the authorised examiner so directed.^F10]

(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_I4

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_I5

8.—(1) Equivalent European provisions are—

(a)the provisions as to verification in Council Directive 76/891/EEC(6) as amended by Commission Directive No. 82/621/EEC(7) and Protocol 1 and Part IX of Annex II to the EEA Agreement;

(b)European Standard EN 61036:1996(8); and

(c)^F11any standard, technical regulation, manufacturing method or code of practice accepted by ... 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.

^F12(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 ... EEA States where such bodies and laboratories conform with European Standard EN 45001:1989(9).

Batch certification_I6

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_{cross-notes I7}

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

[^F13 11.—(1) The fee payable to the Authority for the examination testing and certification of meters—

(a)by a meter examiner who is a member of the Authority’s staff, or

(b)by a meter examiner, not a member of the Authority’s staff, who has been instructed by the Authority, whether directly or indirectly by instruction given to the meter examiner’s employer, to examine and test meters submitted for certification,

shall be calculated in accordance with paragraph (3).

(2) The fees payable to the Authority in respect of authorisation pursuant to regulation 3 or 4 shall be calculated in accordance with paragraphs (4) and (5).

(3) The fee referred to in paragraph (1) shall be an amount equal to the aggregate of:—

(a)in the case of a meter examiner who is a member of the authority’s staff,

(i)a sum calculated at the rate of £45 per hour for all time that the meter examiner spent examining or testing or procuring the testing of the meter, including any time spent attending at any test carried out by another; plus

(ii)any reasonable expenses, including incidental expenses, of the meter examiner in travelling to and from premises other than those of the Authority for the purpose of attending at any test carried out by another; plus

(b)a sum equal to the costs incurred by the Authority (other than the cost of employing the meter examiner referred to in sub-paragraph (a)) attributable to procuring from any person the provision of premises, equipment or personnel (including a meter examiner) for the purpose of examining or carrying out any test on the meter.

(4) The fee for an authorisation under regulation 3(1) or 4(1) shall be an amount equal to the costs incurred by the Authority in determining whether it is satisfied as to the matters referred to in paragraphs 3(1)(a) to (c) and 4(1)(a) to (c), including the cost to the Authority of obtaining a report from a nominated laboratory in respect of the matters referred to in paragraphs 3(1)(a) to (c) and 4(1)(a) to (c).

(5) The fee for an audit or an inspection carried out by or procured by the Authority shall be:

(a)in the case of an audit or inspection carried out by a member or members of the Authority’s staff, £110 per person per hour.

(b)in the case of an audit or inspection procured by the Authority, a sum equal to the costs incurred by the Authority attributable to obtaining the audit or inspection.

(6) For the purpose of calculation under paragraphs (3) and (5) any part of an hour exceeding 30 minutes shall be charged as an hour.^F13]

Revocation_I8

12. The Meters (Certification) Order 1987(10) and the Meters (Certification) Regulations 1990(11) are revoked.

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

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

Pre-heating_I9

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_I10

(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 rated current.

  For transformer-operated meters, k and Im must either both relate to primary values or both relate to secondary values.

• 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 the threshold current in respect of a meter of that type and at a voltage of 100 per cent. of the declared system voltage of the meters under test. Meters shall not emit more than one output pulse over the 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 emitted per kWh by the meter

  pf

  =

  power factor.

• Method 3

  (c)

  The period calculated for method 1 or method 2 may be halved if the meters under test do not emit any output pulses during the period of the test.

Accuracy tests_I11

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_I12

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.

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_I13

(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_I14

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_I15

(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_I16

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_I17

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.

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

• Note 2 For maximum continuously rated prepayment meters, the low load test value may be twice the value shown.

• Note 3 For test numbers 4 and 6, the inductive power factor shall be between 0.45 and 0.55 inclusive.

Regulation 6(3)

SCHEDULE 2 REPORT ON METER TESTS _{I19,I20,I21,I22,I23,I24,I25,I26}

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(12) 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(13) 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 3 CERTIFICATION TESTS AND TESTING METHODS FOR ALTERNATING CURRENT WATTHOUR METERS

Pre-heating_I27

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 _I28

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

(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—

• For transformer-operated meters, k and Im must either both relate to primary values or both relate to secondary values.

Method 2

Accuracy tests_I29

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_I30

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_I31

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_I32

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 _I33

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_I34

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.

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

• Note 2 For maximum continuously rated prepayment meters, the low load test value may be twice the value shown.

• Note 3 For test numbers 4 and 6, the inductive power factor shall be between 0.45 and 0.55 inclusive.

Regulations 2(1) and 10(6)

SCHEDULE 4 CERTIFICATION PERIODS _I36

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