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RS 941.251 DFJP order of 26 August 2015 on energy and power measurement instruments (OIMepe)

Original Language Title: RS 941.251 Ordonnance du DFJP du 26 août 2015 sur les instruments de mesure de l’énergie et de la puissance électriques (OIMepe)

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941.251

DFJP Ordinance on Energy and Power Measurement Instruments

(OIMepe)

On 26 August 2015 (State 1 Er October 2015)

The Departure E Federal Justice and Police (DFJP),

Having regard to art. 5, para. 2, 8, para. 2, 11, para. 2, 16, para. 2, 17, para. 2, 24, para. 3, and 33 of the Order of 15 February 2006 on measuring instruments (OIMes) 1 ,

Stops:

Section 1 General provisions

Art. 1 Purpose

This Order fixes:

A.
Requirements for electricity meters and measuring transformers;
B.
The procedures for placing these measuring instruments on the market;
C.
Procedures to maintain the stability of measurement of these instruments.
Art. 2 Scope of application

1 The following are subject to the provisions of this order:

A.
Electricity meters intended to measure the consumption or supply of electricity in private households, the arts and crafts, and light industry;
B.
The following measuring transformers with the highest voltage for the equipment U M Maximum 52 kV intended to be installed at the inlet of electricity meters according to the let. A:
1.
Voltage transformers,
2.
Current transformers with assigned primary current I Pr Up to 5 kA.

2 Electricity meters used by transient customers shall not be subject to this order:

A.
Charging terminals for electric vehicles;
B.
On campgrounds and similar facilities.
Art. 3 Definitions

For the purposes of this order:

A.
Electricity meter: An instrument for the continuous measurement of electrical energy in a circuit;
B.
Active energy meter: An electricity meter that determines the active energy;
C.
Measuring transformer: An instrument that operates a reduction of current and high voltages, in measurement quantities that can be measured directly by the electricity meter;
D.
Current transformer: A measuring transformer that measures the current intensity;
E.
Voltage transformer: A measuring transformer that measures the voltage.

Section 2 Electricity meters

Art. 4 Essential requirements

Meters shall meet the essential requirements set out in Annex 1 OIMes. The following essential requirements must also be met:

A.
For active energy meters: the requirements set out in Schedule 1 of this order;
B.
For electricity meters other than active energy meters: the requirements set out in Schedule 2 of this Order.
Art. 5 Procedure for placing on the market

Meter compliance with the essential requirements referred to in s. 4 may be evaluated and certified at the choice of the manufacturer according to one of the following procedures set out in Annex 2 OIMes:

A.
Type examination (module B), completed by the declaration of conformity to the type on the basis of quality assurance of the manufacturing process (module D);
B.
Type examination (module B), completed by the declaration of conformity to the type on the basis of a product verification (module F);
C.
Declaration of conformity on the basis of comprehensive quality assurance and design control (module H1).
Art. 6 Procedure for maintaining measurement stability

1 Meters shall be subject to subsequent verification in accordance with Annex 7, c. 1, OIMes, carried out by the Federal Institute of Metrology (METAS) or by an authorised verification laboratory, as follows:

A.
Electronic measuring device meters: every ten years;
B.
Electromechanical measuring device meters: every 15 years.

2 METAS may in particular cases shorten the time limits set out in para. 1 where there is a suspicion that the stability of measurement is no longer ensured before the deadline. It may order additional examinations.

3 Meters may, at the request of the user, be subject to the statistical control procedure according to Annex 4. Meters subject to the statistical control procedure shall retain their validity of the verification as long as the meters in the sample meet the requirements set out in Annex 4, let. F. Excluded from the statistical control procedure are meters which have already undergone the statistical monitoring procedure and then transferred to the control procedure according to para. 1.

Art. 7 Accuracy Classes

1 For the measurement of active energy consumption in private households, active energy meters of accuracy class A, B or C can be used.

2 For the measurement of active energy consumption in the arts and crafts or light industry, only active energy meters in the accuracy classes B or C can be used.

Section 3 Measurement Transformers

Art. 8 Essential requirements

Transformers must meet the essential requirements set out in Schedule 1 OIMes and Schedule 3 of this Order.

Art. Procedure for placing on the market

Transformers are subject to regular approval and initial verification as set out in Annex 5 OIMes.

Art. 10 Procedure for maintaining measurement stability

1 Transformers are required to undergo further verification in accordance with Annex 7, c. 1, OIMes carried out by METAS or by an authorized verification laboratory, as follows:

A.
In-core Inductive Transformers: every 60 years
B.
Transformers other than those indicated in the let. A: every two years.

2 To the extent permitted, METAS may set a different interval for the subsequent verification of transformers according to para. 1, let. B.

Section 4 Obligations of the user

Art. 11 Mounting, commissioning and servicing of measuring instruments

The user assumes the responsibility specified in s. 21, para. 1, OIMes, but also:

A.
To ensure compliance with the manufacturer's instructions for the assembly and commissioning of the measuring instrument and to entrust the assembly to persons with the necessary technical skills;
B.
The maintenance of the measuring instrument and the periodic review or replacement of parts subject to wear and aging.
Art. 12 Measurement Groups

1 Measurement groups comprising meters and transformers shall be adjusted so that the energy required for the operation of the measuring device is not measured.

2 If a measurement group is to be connected in derogation from para. 1, its own consumption alone should not lead to a display of energy consumption.

3 The additional error caused by the connection cables and the loads of transformers in measurement groups shall not exceed 20 % of the maximum permissible error of the meter.

Art. 13 Control Register

1 Users maintain a control log of the measurement instruments used in their field of activity.

2 The register shall specify for each measuring instrument:

A.
The procedure for maintaining measurement stability is used;
B.
When the maintenance of measurement stability procedure was last applied;
C.
Where it is in service.

3 The energy consumers concerned and the bodies responsible for the implementation of the subsequent control may consult the register at any time.

4 Records must be retained after the expiry of the last audit as long as there are open claims, but at least for five calendar years.

Section 5 Final provisions

Art. 14 Repeal of another act

The DFJP Order of 19 March 2006 on Energy and Power Measurement Instruments 1 Is repealed.

1 [ RO 2006 1613 , 2012 7183]

Art. 15 Transitional provisions

1 Verification of electricity meters carried out prior to the coming into force of this order shall remain valid for the period defined by the law in force at the time of the verification.

2 Verification of measurement transformers made before the entry into force of this order shall remain valid until 31 December 2075.

3 Electricity meters and measuring transformers that have been approved prior to October 30, 2006, may be placed on the market and subject to the initial verification set out in Schedule 5, c. 2, OIMes until October 29, 2016. After the placing on the market, the maintenance of the stability of measurement shall be governed by the provisions of this order; paras. 1 and 2 remain reserved.

4 Electricity meters and measuring transformers that have been approved between October 30, 2006 and the coming into force of this order may still be placed on the market and subject to the initial verification set out in Schedule 5, Ch. 2, OIMes until approval expires. After the placing on the market, the maintenance of the stability of measurement shall be governed by the provisions of this order; paras. 1 and 2 remain reserved.

5 Electricity meters equipped with the measurement functionality of the load curve power or functionality may be placed on the market until 31 December 2017, even if they do not comply with the requirements Of this order concerning these functionalities. From 1 Er January 2018, the maintenance of the stability of measurement of these functionalities is governed by the provisions of this order. The performance of the maintenance of measure stability procedure is performed for these functionalities for the first time at the same time as the next procedure for maintaining the stability of the measure applicable to other intended functionalities From 1 Er January 2018.

6 The classes for the accuracy of active energy meters under the old right correspond to the following classes according to the new right:

A.
Class 2, class "regular meter" and class "meter with transformer of measure", corresponds to class A;
B.
Class 1 and class "accuracy meter" correspond to class B;
C.
Class 0.5 S and class 0.2 S correspond to class C.

7 For the measurement of reactive energy, Class 1 under the old right corresponds to Class 2 under the new right.

8 For active energy meters subject to the statistical control procedure already before the entry into force of this order:

A.
The lots are maintained, even if they do not meet the requirements of Schedule 4, let. B, c. 2 of this Order;
B.
The examination points and the maximum tolerated errors defined under the former right shall be valid until the second sampling inspection after the entry into force of this order; from the second sampling inspection, This order applies.

9 The first announcement of electricity meters for the statistical monitoring procedure is possible until 31 October 2015 if the majority of electricity meters announced were manufactured in 2011. L' al. 8 shall apply mutatis mutandis.

Art. 16 Entry into force

This order shall enter into force on 1 Er October 2015.

26 August 2015

Federal Department of Justice and Police:

Simonetta Sommaruga

Annex 1

(art. 4)

Specific requirements for active energy meters

A Definitions

I

=

The measurement connected to the entry of the meter, proportional to the current intensity crossing the current circuit;

I St

=

Value of I Declared the lowest to which the meter registers the active electrical energy with cos ö = 1 (Balanced load polyphase meters);

I Min

=

Value of I , beyond which the error is in the maximum tolerated errors corresponding to the meter accuracy class (polyphase load balanced meters);

I Tr

=

Value of I Beyond which the error is in the lowest tolerated maximum errors corresponding to the meter accuracy class;

I N

=

Specified reference current for which the meter supplied by a transformer was designed;

I B

=

Reference current of I For which the direct connection meter was designed ( I B = 10 I Tr );

I Max

=

Maximum value of I For which the error is in the maximum tolerated errors;

U

=

The measurement connected to the entries of the meter, proportional to the electrical tension in the current circuit;

U N

=

Reference voltage of U ;

F

=

Frequency of the voltage provided to the meter;

F N

=

Reference value of F ;

ö

=

Phase difference ö , between I And U .

B Specific Requirements

1 Accuracy Classes

The manufacturer must specify the meter's accuracy class. The accuracy classes are: A, B, and C.

2 Nominal Operating Conditions

The manufacturer shall specify in particular the nominal operating conditions of the following meter:
2.1
The values F N , U N , I N , I St , I Min , I Tr And I Max That apply to the meter. For the specified current values, the meter shall meet the conditions specified in Table 1.
Table 1

Class A

Class B

Class C

Direct plugging meters

I St

£ 0.05 I Tr

£ 0.04 I Tr

£ 0.04 I Tr

I Min

£ 0.5 I Tr

£ 0.5 I Tr

£ 0.3 I Tr

I Max

³ 50 I Tr

³ 50 I Tr

³ 50 I Tr

Meters on Measuring Transformer

I St

£ 0.06 I Tr

£ 0.04 I Tr

£ 0.02 I Tr

I Min

£ 0.4 I Tr

£ 0.2 I Tr *

£ 0.2 I Tr

I N

= 20 I Tr

= 20 I Tr

= 20 I Tr

I Max

³ 1.2 I N

³ 1.2 I N

³ 1.2 I N

* Condition I Min £ 0.4 I Tr Applies to Class B electro-mechanical meters.

2.2
In addition, the ranges of voltage, frequency and power factor within which the meter must meet the maximum permissible error conditions specified in the c. 3 of Table 2. These beaches must take into account typical characteristics of electricity supplied by public distribution systems.
2.2.1
The voltage and frequency values shall at least be within the following limits:
0.9 U N £ U £ 1.1 U N ;
0.98 F N £ F £ 1.02 F N .
2.2.2
The power factor is within the limits of cos ö = 0.5 inductive to cos ö = 0.8 capacitive.

3 Maximum Tolerable Errors (EMT)

3.1
The effects of different measurers and influence sizes ( A , B , C , ...) are evaluated separately, with all other measurement and influence sizes being kept relatively constant at their reference value. The measurement gap, which should not be greater than the EMT indicated in Table 2, is calculated as follows:
Measurement gap = Image
3.2
When the meter works at variable load currents, the errors in % shall not exceed the limits indicated in Table 2. When the meter operates in several temperature ranges, the relevant values of the EMT shall be Applicable.
Table 2: EMT in % in the rated operating conditions, load current and operating temperature.

Table 2

Operating temperatures

+ 5 ° C to +30 ° C

-10 ° C to + 5 ° C or +30 ° C to +40 ° C

-25 ° C to -10 ° C or +40 ° C to +55 ° C

-40 ° C to -25 ° C or +55 ° C to +70 ° C

Meter class

A

B

C

A

B

C

A

B

C

A

B

C

Single phase meter; polyphase meter if operating at balanced loads

I Min ≤ I < I Tr

3.5

2

1

5

2.5

1.3

7

3.5

1.7

9

4

2

I Tr ≤ I < I Max

3.5

2

0.7

4.5

2.5

1

7

3.5

1.3

9

4

1.5

Polyphase meter if it operates on a single phase load

I Tr ≤ I < I Max *

4

2.5

1

5

3

1.3

7

4

1.7

9

4.5

2

* Exception: for polyphase electromechanical meters, the range of current intensity for single phase load is limited to 5 I Tr £ I £ I Max .

3.3
The meter shall neither exploit the EMT nor systematically favour one of the parties.

4 Tolerable Effect of Disturbances

4.1
General information
4.1.1
For meters, special electromagnetic environment conditions must be met. Meters shall comply with the E2 environment conditions and the additional requirements set out in the c. 4.2 and 4.3.
4.1.2
Long-term disturbances shall not affect the accuracy of the meter beyond the limit values of the c. 4.2. Transient disturbances may temporarily cause a degradation or loss of function or result, but after disturbance the meter must overcome the degradation or loss of function or result and the accuracy shall not Be assigned beyond the limit values according to the c. 4.3.
4.1.3
Where there are high foreseeable risks associated with lightning and in the event of a predominance of air power systems, the metrological characteristics of the meter shall be protected.
4.2
Effect of long-term disturbances
Table 3: Limit values for long-term disturbances

Table 3

Disturbances

Limit Values in % for Class Meters

A

B

C

Reverse Phase Sequence

1.5

1.5

0.3

Voltage disequilibrium (applicable only to polyphase meters)

4

2

1

Harmonics in current circuits *

1

0.8

0.5

Continuous and harmonic current in current circuits *

6

3

1.5

Fast Transient Salves

6

4

2

Magnetic fields, HF electromagnetic fields, conduction disturbances introduced by fields at radio frequencies and immunity to oscillatory waves

3

2

1

* for electromechanical electricity meters, no limit value is defined for harmonics in current circuits.

4.3
Tolerance of transient electromagnetic phenomena
4.3.1
The effect of electromagnetic disturbance on an electric energy meter shall be such that, during and immediately after the disturbance, no output intended to test the accuracy of the meter produces pulses or signals Corresponding to an energy greater than the critical variation value.
4.3.2
Within a reasonable time from the disturbance after the electromagnetic disturbance, the meter:
A.
Must start operating within EMT limits;
B.
Must back up all metering functions;
C.
Must allow for the recovery of all measurement data collected immediately before the disturbance;
D.
Shall not indicate a change in the recorded energy greater than the critical variation value; the critical variation value expressed in kilowatt-hour is: M ' U N ' I Max ' 10 -6 , where M Is the number of meter measuring elements; U N Is expressed in volt and I Max In ampere.
4.3.3
For current over-intensity, the limit value is 1.5 %.

5 Dequation

5.1
Below the rated operating voltage, the positive error of the meter shall not exceed 10 %.
5.2
The display of the total energy shall contain a sufficient number of digits so that the indication does not return to its initial value when the meter operates for 4000 h at full load ( I = I Max , U = U N And cos ö = 1); the display should not be able to be reset to zero in use.
5.3
In the case of a power failure in the circuit, the measured quantities of electrical energy shall be capable of being read for a period of at least four months.
5.4
Blank operation
If a voltage is applied without a current passing through the circuit, the meter shall not record any energy, for any voltage between 0.8 U N And 1.1 U N .
5.5
Starting measure
The meter must start and continue to register with U = U N And cos ö = 1 (polyphase meter with balanced loads) and a current equal to I St .

6 Units of Measure

The measured electrical energy shall be indicated in kilowatt-hour or megawatt-hour. The symbols to be used for these units are "kWh", respectively "MWh".

Annex 2

(art. 4)

Specific requirements for electricity meters other than active energy meters

A Definitions

The applicable definitions are those set out in Schedule 1, let. A.

B General

1 Result Display

1.1
With regard to measuring instruments which can be read remotely, it is possible to abandon the display system provided for in Annex 1, c. 10.5, OIMes when the conditions set out in Annex 1, c. 10.6, OIMes are completed.
1.2
If the display system is renounced in Schedule 1, c. 10.5, OIMes, the measurement result prior to remote reading is valid in case of difference in determining the price to be paid.

2 Compliance mark

2.1
The following mark of conformity, of a minimum height of 5 mm, shall replace the mark provided for in Annex 4, c. 1.1, OIMes:

Image

2.2
The other provisions of Annex 4 OIMes shall apply.

C Specific requirements for the measurement of reactive energy

1 Accuracy Classes

The manufacturer must specify the meter's accuracy class. The accuracy classes for the reactive energy measurement are as follows: 3 and 2.

2 Nominal Operating Conditions

The manufacturer shall specify in particular the nominal operating conditions of the following meter:
2.1
It must specify values F N , U N , I N Or I B , I St , I Min And I Max That apply to the meter. For the specified current values, the meter shall meet the conditions set out in Table 1.

Table 1

Class 3

Class 2

Direct Connection Counter

I St

≤0.01 I B

≤0.005 I B

Metering Transformer Meter

I St

≤0.005 I N

≤0.003 I N

2.2
It shall also indicate the ranges of voltage, frequency and power factor within which the meter shall meet the maximum permissible error requirements according to the c. 3 of Table 2. These beaches must take into account typical characteristics of electricity supplied by public distribution systems.
2.2.1
The voltage and frequency values shall at least be within the following limits:
0.9 U N ≤ U ≤1.1 U N ;
0.98 F N ≤ F ≤1.02 F N .
2.2.2
For the measurement of reactive energy, sin is located within the limits of sin ö = 1 to sin ö = 0.5 inductive and capacitive.

3 Maximum Tolerable Errors (EMT)

3.1
With U = U N , F = F N , the nominal temperature, or, if such a temperature is not defined, at 23 ° C and in the absence of disturbances, the maximum tolerated errors of Table 2 cannot be exceeded.
Table 2: EMT in % in the rated operating conditions, load current and operating temperature.

Table 2

I

Sin ö (inductive or capacitive)

Limit Values in % for Class Meters

Direct Connection Counter

Metering Transformer Meter

3

2

Single phase meter; polyphase balanced charge meter

0.05 I B ≤ I < 0.1 I B

0.02 I N ≤ I < 0.05 I N

Sin ö = 1

4.0

2.5

0.1 I B ≤ I ≤ I Max

0.05 I N ≤ I ≤ I Max

Sin ö = 1

3.0

2.0

0.1 I B ≤ I < 0.2 I B

0.05 I N ≤ I < 0.1 I N

0.5 ≤sin ö < 1

4.0

2.5

0.2 I B ≤ I ≤ I Max

0.1 I N ≤ I ≤ I Max

0.5 ≤sin ö < 1

3.0

2.0

0.2 I B ≤ I ≤ I Max

0.1 I N ≤ I ≤ I Max

0.25 ≤sin ö ≤0.5

4.0

2.5

Polyphase meter with single phase load

0.1 I B ≤ I ≤ I Max

0.05 I N ≤ I ≤ I Max

Sin ö = 1

4.0

3.0

0.2 I B ≤ I ≤ I Max

0.1 I N ≤ I ≤ I Max

0.5 ≤sin ö < 1

4.0

3.0

3.2
The meter shall not exploit the EMT or systematically favour one of the parties.

4 Tolerable Effects of Disturbances

4.1
Specific environmental conditions are applicable for electricity meters. The meter shall comply with the conditions of electromagnetic environment E2 and the additional requirements of the c. 4.2 and 4.3.
4.2
The accuracy of the meter shall not be unduly altered by long-term disturbances.
4.3
Transient disturbances may temporarily cause a degradation or loss of function or result of the meter. After the disturbance, the meter must overcome the degradation or loss of function or result and the accuracy should not be unduly altered.
4.4
Where there are high foreseeable risks associated with lightning and in the event of a predominance of air power systems, the metrological characteristics of the meter shall be protected.

5 Dequation

5.1
The meter shall not be unduly influenced when the operating voltage deviates from the rated operating voltage. If the operating voltage is significantly less than the rated operating voltage, the positive error of the meter shall not exceed 10 %.
5.2
The display of the total energy shall contain a sufficient number of digits to ensure that the indication does not return to its initial value when the meter operates for 1500 hours at full load; the display shall not be capable of being zero-rated In use. Is considered to be a full load operation: I = I Max , U = U N And sin ö = 1.
5.3
In the case of a power failure in the circuit, the measured quantities of electrical energy shall be capable of being read for a period of at least four months.
5.4
Blank operation
If a voltage is applied without a current passing through the circuit, the meter shall not register any energy for any voltage between 0.8 U N And 1.1 U N .
5.5
Starting measure
The meter must start and continue to register with I = I St , U = U N And sin ö = 1. This is true for balanced polyphase meters.

6 Units of Measure

The measured electrical energy shall be indicated in kilovar-hour or megavar-hour. The symbols to be used for these units are "kvarh", respectively "Mvarh".

D Specific requirements for power measurement

1 Equipment for meters of the power measurement functionality

Meters can be equipped with the power measurement functionality for power types for which they also have the power measurement functionality. The requirements for the measurement of energy according to Annex 1 and the let. C of this Annex shall apply mutatis mutandis to the requirements relating to power.

2 Display

The measured active electrical power shall be indicated in watt, kilowatt or megawatt. The symbols to be used for these units are "W", "kW", "MW", respectively. The measured reactive electrical power shall be indicated in var, kilovar or megavar. The symbols to be used for these units are "var", "kvar", "Mvar", respectively.

E Specific Requirements for the Establishment of the Load Curve

1 General

Meters can be equipped with the load curve functionality for the power and power types for which they also have the functionality of the energy or power measurement. Such a meter determines a series of continuous measurements in periods of measurement uninterrupted and records the measured values at the end of each measurement period. The corresponding energy measurement requirements according to Annex 1 and the let. C of this annex and to the measurement of the corresponding power according to the let. D of this annex shall apply mutatis mutandis to the establishment of the load curve. The following requirements must also be met.

2 Clock

2.1
The meter requires an internal clock to produce the measurement period. The length of the measurement period should not deviate from its reference value any more than is appropriate given the current state of the art.
2.2
Timestamps on measurement values must mark the order in which measurements are performed. The meter, to the extent that the time of the device is based on the legal time, must have a function of synchronization, which allows to adjust the time of the device to the maximum once per period of measurement. For synchronization, the time of the device can be changed by up to 30 seconds.
2.3
The setting of the time of the device shall be protected metrologically. Changes exceeding 30 s are considered adjustments.
2.4
The adjusted value of the duration of measurement periods shall be protected metrologically. When the time of the device is based on the legal time, the grid of measurement periods should not be modified so that measurement periods are added or deleted.
2.5
If the clock of the device works with an external tension, it must have a reserve, during which the clock must continue to function without external tension feeding. When the time of the device is based on the legal time, the meter must recognize whether the duration of an outage of the external tension has exceeded the guaranteed reserve. Any overflow must be recorded.
2.6
When the time of the device is based on legal time and is more than adequate given the state of the art, the measured values of all relevant measurement periods must be marked as erroneous, Measured values of measurement periods that have been skipped due to synchronization or adjustment of the time of the device. The measured values of measurement periods during which the clock of the device has been adjusted must also be marked as erroneous.

3 Display

3.1
The definition of load curve values must be large enough to determine whether the TRMs for the measurement of energy and power are met during a measurement period. Even at full load, the display should not revert to the original value and should not be returned to zero in use.
3.2
It must be possible to select and display measured values of measurement periods that serve as the basis for the amount to be paid. It must be possible to choose and display larger count intervals. Above all, it must be possible to add and indicate the measurement periods between the beginning and the end of the count interval, the repeated intervals during the counting period and the measured values above a limit value.
3.3
The sum of all the values of a measurand must give the value of the sum register of the same measurand.
3.4
The meter must display the time of the device. If the time of the device is based on the legal time, and if a deviation from the legal time is expected, usually in full hours as when the full year UTC or HEC is used, this gap must be understandable for the layman or Explained in the instructions for use.

Annex 3

(art. 8)

Specific Requirements for Instrument Transformers

A Definitions

1.
Highest voltage for U hardware M : The highest effective value of the tension between phases for which the material is specified with regard, in particular, to its isolation.
2.
Primary Current I P : A current that crosses the primary winding of a current transformer.
3.
Secondary Current I S : A current that passes through the secondary winding of a current transformer when a current passes through the primary winding.
4.
Assigned Primary Current I Pr : The value of the primary current by which the operating characteristics of a current transformer are determined.
5.
Assigned Secondary Current I Rr : The value of the secondary current by which the operating characteristics of a current transformer are determined.
6.
Primary voltage U P : Voltage which is applied to the primary winding of a voltage transformer.
7.
U Secondary Voltage S : A voltage which appears at the terminals of the secondary winding of a voltage transformer when a voltage is applied to the primary winding.
8.
Assigned primary voltage U Pr : The value of the primary voltage by which the conditions of operation of a voltage transformer are determined.
9.
Assigned primary voltage U Rr : The value of the secondary voltage from which the operating conditions of a voltage transformer are determined.
10.
Transformation Report k: Ratio of the primary voltage to the secondary voltage of a voltage transformer. Ratio between the primary current and the secondary current of a current transformer.
11.
Phase-out ö : The phase difference between the primary voltage and the secondary voltage of a voltage transformer. The phase difference between the primary current and the secondary current of a current transformer.
12.
Output power assigned S R : The value of the apparent power at a specified power factor that the transformer can provide to the secondary circuit at the assigned voltage or secondary current when it is connected to its assigned load.
13.
Frequency assigned f R : The value of the frequency on which the requirements of this Annex are based.

B Specific Requirements

1 Accuracy Classes

1.1
Accuracy classes for current transformers are defined as follows:
0.5 0.5 S 0.2 0.2 S 0.1
1.2
The accuracy classes for voltage transformers are defined as follows:
0.5 0.2 0.1
1.3
The manufacturer must refer to the accuracy class. If the transformer has several windings, the manufacturer shall indicate for each winding the corresponding accuracy class and the one-to-one correspondence at the connection points. Transformers may have additional coils that do not meet the requirements of this order, as long as it is readily recognizable that these additional windings are not intended to be connected to An electricity meter under s. 2, para. 1, let. A.

2 Operating conditions for current transformers

2.1
The manufacturer shall specify the nominal operating conditions for which the transformer is sized. In particular, primary and secondary assigned currents ( I Pr , I Rr ), the output power assigned ( S R ), the assigned frequency ( F R ) And the accuracy class must be visible or determinable by a single calculation in one of the four basic operations. The specified power factor must be readily determinable.
2.2
The manufacturer shall indicate the operating conditions under which the current transformer shall comply with the EMTs defined in the c. 4.
2.3
For primary current intensity I Pr , the transformer operating range is limited as follows:
A.
Class transformers 0.5, 0.2 and 0.1: by the minimum value I Min Maximum 5 % I Pr And the maximum value I Max Minimum 120 % I Pr , with I Max , however, not to exceed 6 kA;
B.
Class current transformers 0.5 S and 0.2 S: by the minimum value I Min Maximum 1 % I Pr And the maximum value I Max Minimum 120 % I Pr , with I Max However, it must not exceed 6 kA.
2.4
For the output power, the operating range of current transformers is limited by the minimum value of not more than 25 % S R Or 1 VA, as long as 25 % S R Is smaller than 1 VA, and by the maximum value of at least 100 % S R .

3 Operating conditions for voltage transformers

3.1
The manufacturer shall specify the nominal operating conditions for which the transformer is sized. In particular, the primary and secondary assigned tensions ( U Pr , U Rr ), the power assigned ( S R ), the assigned frequency ( F R ) And the accuracy class must be visible or determinable by a single calculation performed in one of the four basic mathematical operations. The specified power factor must be readily determinable.
3.2
The manufacturer shall specify the operating conditions within which the voltage transformer shall satisfy the maximum permissible errors defined in the c. 4.
3.3
For primary voltage U P , the voltage transformer's operating range is limited by the minimum value U Min Maximum 80 % U Pr And the maximum value U Max Minimum 120 % U Pr , however, which must not exceed U M .
3.4
For the output power, the operating range of the voltage transformer is limited by the minimum value of not more than 25 % S R And by the maximum value of at least 100 % S R .

4 Maximum Tolerated Errors (EMT)

4.1
Current transformers must comply with the TRAs in Tables 1 and 2 corresponding to their accuracy class.

Table 1

Current Range

EMT for Transformation Report K %

EMT for phase shift ö In minutes

Class

Class

0.5 S

0.2 S

0.5 S

0.2 S

I Min ≤ I P < 5 % I N

1.5

0.75

90

30

5 % I N ≤ I P < 20 % I N

0.75

0.35

45

15

20 % I N ≤ I P ≤ I Max

0.5

0.2

30

10

Table 2

Current Range

EMT for Transformation Report K %

EMT for phase shift ö In minutes

Class

Class

0.5

0.2

0.1

0.5

0.2

0.1

I Min ≤ I P < 20 % I N

1.5

0.75

0.4

90

30

15

20 % I N ≤ I P < 100 % I N

0.75

0.35

0.2

45

15

8

100 % I N ≤ I P ≤ I Max

0.5

0.2

0.1

30

10

5

4.2
Voltage transformers shall comply with the TRAs of Table 3 corresponding to their accuracy class

Table 3

Voltage range

EMT for Transformation Report K %

EMT for phase shift ö In minutes

Class

Class

0.5

0.2

0.1

0.5

0.2

0.1

U Min ≤ U P ≤ U Max

0.5

0.2

0.1

20

10

5

5 Tolerable Effect of Disturbances

5.1
The accuracy of the transformer should not be influenced more than is appropriate given the state of the art by long-term disturbances.
5.2
Transient disturbances may cause a temporary impairment or loss of function or result. After disturbance, the meter must overcome the degradation or loss of function, and the accuracy should not be more affected than is adequate given the state of the art.

6 Dequation

The transformer shall be designed so that it can be connected to a meter that meets the requirements of this order and that has been lawfully placed on the market or is imminent.

7 Designation

7.1
All data necessary for the identification and characterization of the transformer shall appear on the transformer in an indelible, clear and non-transferable manner.
7.2
The transformer connection points shall be marked in a durable and unambiguous manner.

Annex 4

(art. 6, para. 3)

Statistical Control Procedure for Electricity Meters

A Definitions

1. Lot: The number of homogeneous meters which is controlled through the statistical control procedure.
2. Sample: The subset of a lot that is chosen for testing.

B Requirements for Lots

The meters are assembled to form a lot according to the following criteria:
1
A lot can have a maximum of 5000 meters.
2
A lot may contain only meters of the same type, with the same accuracy class and operating range, from two consecutive years of manufacture at most. Meters of two consecutive years of manufacture are allowed only when the number of meters in the lot manufactured in one of the two years is not greater than 1000 meters.
3
Different combinations of meters are not allowed within the same batch. Only minor differences that cannot have an influence on the outcome of sample control are allowed.
4
A batch can contain counters belonging to multiple users. All users within a lot shall be concerned in solidarity with the result of the sampling inspection and the possible measures. The commitments referred to in the let. D, c. 5, in particular, may be honoured only with the consent of all users.
5
METAS lays down directives laying down administrative procedures relating in particular to the announcement, designation, management and deployment of consignments, as well as the organisation of sampling controls and the announcement of the results of controls.

C Preparation of Sampling Control

1
The user who wishes to announce new meters for the statistical control procedure must do so until June 30 of the fourth year following the manufacture of the majority of the meters announced. The first sampling inspection shall take place five years after the year of manufacture of the majority of the meters contained in the lot. Thereafter, sampling controls shall be carried out every five years.
2
Batches are administered by METAS or by a qualified audit laboratory. METAS or a qualified verification laboratory shall draw the samples, based on the lists of lots, in the second half of the year preceding the sampling inspection. If the lot is administered by an authorized verification laboratory, it submits the batch list to METAS. The drawing of samples shall be carried out in accordance with a procedure approved by METAS. Two samples of 46 meters per sample were taken, six of which were used as reserve meters. Reserve meters can be controlled only in exceptional cases defined in the lettering. E, ch. 2 and 3.
3
The user must make available the first sample within four months of the notification of the sample drawing. The second sample shall, to the extent necessary according to the let. D, c. 3, be made available within two months of the notification of the results of the control of the first sample. If the user decides to make available the second sample independently of the results of the control of the first sample, he shall make available both samples within six months of the notification of the draw of the Samples.

D Sample Requirements

1
At first, METAS or an authorized verification laboratory controls the 40 meters in the first sample. The requirements for samples shall be considered to be fulfilled if at most a meter does not meet the requirements set out in Annexes 1 and 2.
2
If more than four meters in the first sample do not meet the requirements set out in Schedules 1 and 2, all meters in the lot shall be taken out of service according to the meter. F, c. 2.
3
If two, three or four meters of the first sample do not meet the requirements, the 40 meters in the second sample are also controlled. If more than four meters of the two samples do not meet the requirements set out in Annexes 1 and 2, all meters in the lot shall be taken out of service according to the meter. F, c. 2.
4
METAS may order additional checks and investigations if deviations from the normal behaviour of meters are suspected, in particular if it is assumed for certain types, certain years of construction or certain lots, that Sample meters are not representative for all meters in service of the lot concerned. METAS may exclude certain types, years of construction or lots of the statistical control procedure.
5
Enforcement of controls may be waived in accordance with c. 1 and 3 when the user agrees, within the time allowed for the making available of the meters according to the let. C, c. 3, to disservice all meters of the lot concerned according to the let. F, c. 2.

E Sampling control execution

1
The meters in the sample are controlled in the lead state.
2
Meters with obvious signs of deterioration do not need to be controlled. However, they must be reported to METAS indicating the nature of the deterioration. METAS may authorize the use of reserve meters.
It shall be regarded as obvious only the deterioration of the damage caused by laypersons without auxiliary means and without disassembling of parts such as fire damage, water damage, durable electronic failure or malfunction reported by the meter of a In such a way that a layman can detect it without prior knowledge of the instructions for use.
3
If a meter is not found or not unmounted, the user should report it to the authorized verification laboratory indicating the meter installation address. If the corresponding lot is administered by METAS the meter shall be reported to METAS.
METAS may fix, for a particular case, how a meter not found or not unmountable is counted during the evaluation defined at the let. D, c. 1 to 3. It may authorize the use of reserve meters.
4
Controls must be completed by the end of October of the year of control. If the lot is administered by an authorized verification laboratory, it transmits the results of the control to METAS immediately after the control of the sample.
5
Within two months from the receipt of the results of the control, METAS decides on the continuation of the procedure. Until the release of the batch by METAS, any intervention on the sample meters is prohibited and the sealing sinkers of the sample meters shall not be broken. During this period, the meters remain at the disposal of METAS. METAS may carry out other investigations either by mandating an audit laboratory or by executing them themselves.
6
If the sample meets the requirements, the lot is released by METAS to the extent that any additional controls and investigations according to the let. D, c. 4 did not identify that the type, the years of construction represented in the lot or lot should be excluded from the statistical control procedure. The release is in writing.
7
Meters in the sample that do not meet the requirements shall be repaired or removed from circulation.
8
The user can review meters belonging to existing lots only with an authorization from METAS and on the basis of a program approved by METAS.

F Validity of the Audit

1
If METAS releases the batch according to the let. E, ch. 6, the meters of the released lot are considered to be verified for the next five years, to the extent that they remain subject to the statistical control procedure.
2
Where the samples do not meet the requirements or when the controls referred to in the let are abandoned. D, c. 5, all meters of the lot concerned shall be taken out of service until the end of the year following the year of control at the latest.
3
A new placing on the market of meters removed from circulation requires verification in accordance with Annex 7, c. 1, OIMes.
4
For meters which despite the extension of the validity of their verification according to the c. 1 must be replaced or whose lots are deleted, METAS may decide, at the request of the user, that these meters are considered to be verified for a maximum period of five years. These meters can no longer be allowed in the statistical control procedure.

G Equivalent Procedures

METAS may in special cases order or approve other procedures that are statistically at least equivalent.