The regulation on requirements for electricity meters-Date 2007-12-28-1753 Ministry industry and Fisheries Ministry published in 2008 clips 1 entry into force 01.01.2008 Recently changed-2014-12-10-1576 from 01.01.2015 Change FOR-2004-10-22-1398 applies to Norway Pursuant LAW-2007-01-26-4-section 7, LAW-2007-01-26-4-section 8, LAW-2007-01-26-4-section 10, LAW-2007-01-26-4-section 17, LAW-2007-01-26-4-section 19, LAW-2007-01-26-4-section 30, LAW-2007-01-26-4-section 35, FOR-2007-12-20-1723-section 1-2, FOR-2007-12-20-1723-section 5-1, LAW-2004-12-17-101 Announced January 11, 2008 at 22:00. 15.40 Directed 02.05.2008 (§ 24, § 27, § 28) short title regulations on requirements for electricity meters Chapter overview: Chapter 1-Introductory provisions (§§ 1-2) Chapter 2-requirements for electricity meters that are sold or offered for sale (§ § 3-35) Chapter 3-requirements for electricity meters during use (§ § 36-41) Chapter 4-control schemes for electricity meters during use (§ § 42-53) Chapter 5-Final provisions (§ § 54-55) legal authority: set by the Norwegian metrology service 28. December 2007 with authorization in law 26. January 2007 Nr. 4 about the units of measurement, measurement and standard time § 35, cf. § 7 and § 10 and § 8, section 17, section 19 and section 30 and regulations 20. December 2007 Nr. 1723 about measurement units and measurement section 1-2 second paragraph and section 5-1 the second paragraph.
EEA EEA referrals: annex II, chap. IX Nr. 27B (Directive 2004/22/EC as amended by Directive 2009/140/EC). Forskriftens Chapter 3, 4 and section 1, section 2, section 26 and section 28 is reported to the EFTA overvåkinsorgan according to the requirements of the Act 17. December 2004 No. 101 on European report for technical rules (EEA høringsloven) and Directive 98/34/EC as amended by Directive 98/48/EC.
Changes: modified by regulations 9 sep 2011 No. 921, 12 Dec 2011 No. 1267, 10 Dec 2014 Nr. 1576. Corrections: 02.05.2008 (§ 24, § 27, § 28).

Chapter 1-Introductory provisions § 1. Scope this regulation lays down the requirements that will apply to electricity meters which measure active energy or a combination of active and reactive energy when a) they are sold or offered for sale, cf. regulations 20. December 2007 Nr. 1723 about measurement units and measurement section 3-1, and when b) they are used in low voltage distribution network as the basis for the calculation of the financial settlement. regulations on the measurement units and measurement section 3-4.

Electricity meters that are sold or offered for sale to meet the minimum basic requirements set out in Chapter 2. The requirements of electricity meters under use is set out in Chapter 3.
Control schemes for electricity meters under use is regulated in Chapter 4 of the regulations here, while control and approval arrangements for electricity meters that are sold or offered for sale is regulated in the regulations on the measurement units and measurement Chapter 4.
The regulation here does not claim to electromagnetic radiation. This is governed by regulations 10. August 1995, no. 713 on electrical equipment.

§ 2. Definitions in this regulation is meant by: a) the Electricity meter: a device that measures the active electrical energy consumed in a circuit, including measures which in addition measures reactive electric energy. Meters which only measures reactive energy are not covered by the definition in this regulation b) low voltage distribution network: plant with highest nominal voltage and 1000 V alternating current or direct current 1500 V c) Static measures: an electronic meter d) measuring the size: the particular size to be measured e) Influence size: one size that is not measuring the size, but that affect the measuring result f) specified operating conditions : The values of measuring the size and influence of sizes that make up the electricity meter normal operating conditions g) disorder: A influence the size of a value that is within the limits specified in the appropriate requirement but outside the electricity meter specified operating conditions. A influence size is regardless a disruption if it is not specified in the specified operating conditions h) Critical change value: The value at which the change in the measurement result is considered undesirable in) Climatic environments: The environment where electricity meters can be used. It is defined a number of temperature limits to account for climate differences between the EEA States j) Supply business: A supplier of electricity, gas, heat or water.

Chapter 2-requirements for electricity meters that are sold or offered for sale in the General requirements Section-section 3. Measure the technical protection and quality level A should have an electricity meter high degree of measuring technical protection, so that all affected parties can have confidence in the process to measure the results, and it should be constructed and manufactured after the satisfactory level of quality with respect to measuring technology and measure the data's security.

§ 4. Intended use and foreseeable misuse should be taken into account electricity meter intended use as well as the foreseeable misuse by the choice of solutions that are applied to meet the requirements of this chapter.

§ 5. Allowable error in the specified operating conditions and in the absence of a disturbance to measure the error does not exceed the maximum allowable measurement errors that are set out in section 28. Unless otherwise specified in paragraphs II, expressed the maximum allowable measurement error as the deviation from the true measurement value that a two-sided range.
Under the specified operating conditions and if there is a disruption, is the requirement of performance as provided in section II.
If the electricity meter is used in a calculated given permanent continuous electromagnetic field, to measure the result during the experiment with amplitude electromagnetic field fall within the maximum permitted measurement errors.

section 6. Sizes to specify the influence the Manufacturer climatic, mechanical and electromagnetic environment that the electricity meter is intended used in, as well as power supply and other influence sizes that can affect the measurement accuracy, as taking into account the requirements set out in section II.

section 7. Climatic environments manufacturer to enter the upper and lower temperature limit among the values in table 1 and specify whether or not the electricity meter is designed for condensing or non-condensing humidity, as well as about the intended location is open or closed. 
Table 1 the upper temperature limit is 30 ° C 40 ° C 55 ° C 70 ° C Lower temperature limit 5 ° C-10 ° C-25 ° C-40 ° C section 8. Mechanical environment The mechanical environment are classified into the following classes: table 2 M1 This class include electricity meters used in places with minimal exposure to vibration and shock, e.g. electricity meters as mounted on light support structures and exposed to negligible vibrations and shocks from local tests, construction work, smelling with doors, etc.

M2 This class include electricity meters used in locations with significant or high vibration and shock level, eg. caused by machines and passing vehicles in the vicinity, or that the electricity meter is located in the immediate vicinity of heavy machines, conveyor belts, etc.

M3 This class include electricity meters used in places with high and very high vibration and shock level, such as electricity meters mounted directly on machines, conveyor belts, etc.

  It should be taken into account the following sizes in relation to the influence the mechanical environment: a) Vibration b) Mechanical shock.

§ 9. Electromagnetic environment unless otherwise set out in section II are classified the electromagnetic environment in the following classes: table 3 E1 This class include electricity meters used in locations with electromagnetic disturbances corresponding to those one might find in buildings used for residential and commercial purposes, and light industrial buildings.

E2 This class include electricity meters used in locations with electromagnetic disturbances corresponding to those one might find in other industrial buildings.

E3 This class include electricity meters that get power from the battery of a vehicle. Such electricity meters to meet the requirements of E2 as well as the following additional requirements: the voltage drop caused by the charge of the start circuit in internal combustion engines and spenningstransienter disconnect the discharged battery while the engine is in operation.

  It should be taken into consideration to the following in connection with the size influence electromagnetic environments: a) Voltage interruptions b) short term reduced voltage c) Spenningstransienter on the supply wires and/or signal wires, electrostatic discharge d) high-frequency electromagnetic field e) transferred the high-frequency electromagnetic fields on supply lines and/or signal lines f) Surges on supply lines and/or signal lines.

§ 10. Other sizes to influence The consideration given to the following other influence when appropriate sizes: a) the voltage variation b) variations in the network rate c) Nettgenererte magnetic field d) other sizes that can affect the electricity meter accuracy substantially.

section 11. Basic rules for trials and determination of the error of trying according to this Regulation applies to the following: a) the basic requirements specified in section 5 should be checked for each relevant influence size. Unless otherwise specified in paragraphs II, applies these basic requirements when each influence size applied to the and the impact of it be considered separately, as all other influence sizes are kept relatively constant at their reference values b) Measure attempts to be performed during and after the application of the influence the size, which corresponds to the normal operational status of the electricity meter when this influence the size can be assumed to act.


§ 12. Humidity depending on the climatic environment electricity meter is intended for use in, the most appropriate test sequence either be stationary humid heat (non-condensing) or damp heat cyclic (condensing).
Test sequence with cyclic fluctuating moisture is appropriate if the condensation is important, or if dampgjennomtrengning will be brought forward by the ventilation. By conditions where non-condensing humidity is important, the test sequence with desktop damp heat is appropriate.

section 13. Reproducibility if the electricity meter is used to measure the same measure the size, but in different locations and of different users, should the results of successive measurements be in close matches. The variation in the measurement results shall be small compared to the maximum permitted measurement errors.

section 14. Repeatability If measuring the size have the same value and measuring conditions are unchanged, to the subsequent measure the results vote along well. The variation in the measurement results shall be small compared to the maximum allowable measurement errors.

section 15. Resolution and sensitivity should be A sufficient electricity monitor sensitive, and should have sufficient resolution adapted to measure the task.

section 16. Durability A electricity shall be constructed so as to measures that its measure technical characteristics are sufficiently stable in a time period that sets out the manufacturer, provided that it be installed, maintained, and used correctly in accordance with the manufacturer's instructions and in the environment it is destined for.

§ 17. Reliability A electricity meter should be constructed so that the impact of a malfunction that causes an inaccurate measurement result, be reduced as far as possible, unless such error is obvious.

§ 18. Fitness electricity should be A measurement: a) suited to the intended use, as they is taken into account in practice occurring operating conditions, and it should not be unreasonable demands of the user in order to achieve a correct measure score b) Insensitive to slight variations in the measurement size value, or to respond in an appropriate manner if the meter is intended for the measurement of values of the measure the size that is constant over time c) designed to measure the function to be able to be checked after the electricity meter is marketed and put to use. If necessary to specific equipment or software to this control be a part of the electricity meter. The test procedure shall be described in the operation manual d) Robust and made of materials which are suitable for the intended operating conditions.

An electricity meter should not be of such a nature that it can be easily used for fraud, and the possibility of unintentional misuse shall be minimal. An electricity meter that is used with the throughput or electric power outside the controlled area, should not have unnecessary systematic error.
If an electricity measures have associated software with other features than measuring function, to the software that have critical importance for measuring function, could be identified, and it should not be exposed to disturbing influences from the associated software functions.

§ 19. Protection against manipulation if the electricity meter be connected to another device directly or through the remote connection, to its measure technical characteristics are not affected by the device in an improper way. Components that have critical importance for the measuring technical properties, shall be constructed so that they can be secured. They spent security measures should make it possible to detect whether the infringement has taken place.
Software that has crucial importance for the measuring technical properties, should be tagged accordingly, and shall be secured. Identification of such software to easily furnish from the electricity meter. Any information or indication that there has been an intervention should be available in a reasonable period of time.
Measurement data, software that is of vital importance for measuring the properties, and measure important parameters that are stored technical or transferred, shall be appropriately protected against intentional or accidental changes.
The display of the total quantity or the views that the cumulative amount of can be derived from, and as completely or partially forms the basis for payment, shall not be able to be reset during use.

section 20. Information to be applied to or follow the electricity meter An electricity meter to be inflicted on the manufacturer's mark or name and information about the gauge accuracy. To the extent that it is relevant to the following information applied to the electricity meter: a) the relevant information about the terms of b) measure the capacity c) measure the area d) Identity Mark e) number on the certificate of the EC or EC typegodkjenning konstruksjonsundersøkelse f) information about the additional equipment that gives the measuring results, complies with established regulations regarding the law regulated measure technical control.

Information about the operation to follow the electricity meter unless the meter is so simple that this is unnecessary. The information should be easy to understand, and to be in the relevant scope include the following: a) the specified operating conditions b) electromagnetic environment c) upper and lower temperature limit, whether condensation is acceptable or not, open or closed location d) instructions for Assembly, maintenance, repairs and allowed settings e) Instructions for correct operation and any special conditions f) conditions for compatibility with interfaces, sub-assemblies or measuring tool.

If the electricity meter dimensions are too small or its construction for the sensitive to that the relevant information may be applied, should these be caused the following documents as required under this regulation. All the markings and påskrifter should be clear and unambiguous and they shall not be able to be removed or moved. For groups of identical electricity meters, it is not necessary with the individual instruction manuals.

§ 21. Specification of the measurement value unless otherwise indicated in section II, the scale interval for a measured value be of the form 1 × 10n, 2 × 10n or 5 × 10n, where n is an integer or zero. The unit of measurement or its symbol to appear near the number value.
It will be used measurement units and symbols that are in accordance with the provisions of Chapter 2 of the regulations on the measurement units and measurement.

§ 22. View of the result the result will appear on a display or as paper printing. When printing to the font or the registration be easily readable and could not be removed.
All results should be clear and unambiguous and accompanied by the marks and påskrifter that are required to advise the user of the result's significance. The displayed results, should be easily readable under normal usage conditions. Further information can be displayed under the condition that it cannot be confused with the measuring technical controlled the results.
Regardless of whether an electricity meter that is designed to supply measurement can fjernavleses or not, it shall be equipped with a metrologisk controlled display or view that the user can read without the use of utilities. It as it reads on the display or the display, measuring the result that forms the basis for the price to be paid.

§ 23. Conformity assessment shall be An electricity meter constructed so that it can easily be considered whether it is in compliance with the relevant requirements of this regulation.

Section II-specific requirements section 24. Definitions in the electrical current through the meter In = the specified reference power as the transformatordrevne meter is designed for Ist = the lowest value of specified in which the meter registers active electrical energy at impact factor 1 (Polyphase meters with symmetric load) Imin = the value of the in which the meter error is within the specified tolerangrenser (Polyphase meters with symmetric load) Itr = the value of the gauge should be located where the error within the smallest tolerances corresponding class designation Imax = maximum value of the in which the meter error is within specified tolerances U = infused with electrical voltage to the meter Un = the specified reference voltage f = the frequency of the voltage applied to the meter fn = the specified reference frequency PF = power factor = cosφ = the cosine of φ fasedifferansen between in and U.

§ 25. Accuracy to have Electricity meters class indexes A, B, or c. the manufacturer should specify the gauge class index.

§ 26. Uses for electricity meters table 4 Measures class A in temperature range + 5 ° C ... + 30 ° C is used for meters for indoor installation for use in households, including rental purposes, private Studio apartment and apartment houses.

Measures the grade B in the temperature range-25 ° C ... + 55 ° C is used for meters for outdoor installation for use in households, including cottage/holiday property Measures class B in temperature range + 5 ° C ... + 30 ° C are used for:-non-transformatorkoblede meters for indoor installation for use in business/light industry, including common gauges in store centres-wands, online meters for use for lighting/heating of the public way.

Measure class C with optional temperature range Can be used for all applications. Must be used for:-Transformatorkoblede meters for use in the food business/light industry, including common gauges in store centers-common gauges in the condo with subsequent meters in series-Transformatorkoblede meters for lighting/heating of the public way.

§ 27. Specified operating conditions the manufacturer will supply the specified operating conditions for the meter, especially the values of fn, Un, In, Ist, Imin, Itr and Imax that apply to the meter. For the specified flow values to meet the criteria given in the meter table 5: table 5 class A Class B Class C from gauges Ist ≤ 0.05 · ITR ≤ 0.04 · ITR ≤ 0.04 · ITR Imin ≤ 0.5 · ITR


≤ 0.5 · ITR ≤ 0.3 · ITR Imax ≥ 50 · ITR ≥ 50 · ITR ≥ 50 · ITR For transformatorkoblede meters Ist ≤ 0.06 · ITR ≤ 0.04 · ITR ≤ 0.02 · ITR Imin ≤ 0.4 · ITR ≤ 0.2 · Itr1 ≤ 0.2 · ITR In = 20 · ITR = 20 · ITR = 20 · ITR Imax ≥ 1.2 · In ≥ 1.2 · In ≥ 1.2 · In 1 For class B electromechanical meters Imin ≤ 0.4 apply · ITR.

Voltage, frequency and power factor ranges within which the meter shall satisfy the requirements to the maximum allowable measure error is specified in the third and fourth paragraph. These areas should take into account the typical features of the power that comes through the public distribution systems.

The voltage and frequency range should be at least: 0.9 · UN ≤ U ≤ 1.1 · UN 0.98 · fn ≤ f ≤ 1.02 · UN Effect factor site is at least from cosφ = 0.5 inductive to cosφ = 0.8 capacitive.

section 28. The maximum permissible error of measuring Influences the different measuring sizes and influence sizes (a, b, c, ...) are evaluated separately, all other measuring sizes and sizes be kept relatively constant influence on their reference values. Measuring error, not to exceed the maximum allowable measure error specified in table 6, is calculated as the Measure error = √ (a + b + ² ² ² c ...).
If the meter working under varying power loads, the percentage of errors do not exceed the limits given in table 6. 
Table 6 Maximum allowable measure error in percent by specified operating conditions and defined load current levels and operating temperature Operating temperature Operating temperature Operating temperature Operating temperature + 5 ° C ... + 30 ° C-10 ° C ... + 5 ° C or + 30 ° C ... + 40 ° C-25 ° C ...-10 ° C + 40 ° C ... + 55 ° C-40 ° C ...-25 ° C + 55 ° C ... + 70 ° C A B C A B C A B C A B C Enfasemåler; multiple-phase measures operating with symmetric load Imin ≤ 3.5 in Itr 2.5 < 2 1 5 7 9 4 2 1.3 1.7 ≤ 3.5 in Itr ≤ Imax 2.5 3.5 4.5 2 0.7 3.5 1.5 1.3 1 7 9 4 multiple-phase measures by operation with the Itr ≤ enfasebelastning ≤ Imax in 4 1 5 3 7 4 2.5 1.3 1.7 9 4.5 2 For electromechanical Polyphase meters is the power range of the enfasebelastning limited to 5Itr ≤ in ≤ Imax.

If a meter working at different temperature ranges, applies to the relevant values for the maximum permissible measurement error.
An electricity meter should not exploit the maximum allowable error or systematically favor a specific party.

section 29. Permissible influences from interference since the electricity meters are directly connected to the mains supply, and since the utility power is also one of the measuring sizes, applied a special electromagnetic environment for electricity meters. The meter should be in accordance with the electromagnetic environment E2 and the additional requirements of section 30 and section 31.
The electromagnetic environment and permissible effects reflect the situation where there are disturbances of long duration which shall not affect the accuracy beyond the critical change and disturbance, which can transiente cause temporary decrease or loss of function or performance, but that the meter shall return from, and that should not affect the accuracy beyond the critical change.
If there is a predictable high risk due to lightning, or if supply predominantly occurs through the air lines, to gauge measure the properties will be protected.

section 30. The influence of disturbances of long duration table 7 Critical changes in percent for gauges in class A B C Reverse phase sequence 1.5 1.5 0.3 Lopsided tension (Polyphase meters) 4 2 1 content of overharmoniske in strømkretser1 1 0.8 0.5 Content of direct current and in 1.5 overharmoniske strømkrets1 6 3 Fast transiente burst of electrical noise 6 4 2 magnetic fields; high frequency electromagnetic fields (RF innstrålt), led the interference occurred due. RF-fields, and immunity to standing waves 3 2 1 1 For electromechanical electricity meters, it is not defined critical change values for overharmoniske content in the power circuits and for DC and overly content in the power circuit.

section 31. Permissible influences of electromagnetic influence of transiente phenomena an electromagnetic disturbance on an electrical meter shall be such that during and immediately after the disturbance to any size intended for testing of meter accuracy not present pulses or signals corresponding to an energy of more than the critical change value.
In a reasonable time for an electromagnetic interference to the meter: a) Resume operations within the limits of the maximum permissible measurement error b) have all measuring functions intact c) give the opportunity to return the collection of all measurement data that was signed before the disturbance and d) does not show any change in the registered energy of more than the critical change value.

The critical change value in kWh is m · UN · IMAX · 10-6 (where m is the number of measuring elements of the meter, Un in volts and Imax in AMPS). For overstrøm is the critical change value is 1.5%.

section 32. Fitness Under the nominal operating voltage to monitor positive error not exceed 10%.
Display the device shall have a sufficient number of digits to ensure that the display does not come back to the starting value when the meter works in 4000 hours at full load (I = Imax, U = Un and PF = 1), and it should not be able to be reset during use.
By loss of power supply in the circuit to the quantities of electrical energy that have been measured, be available for reading in a time span of at least four months.

section 33. Operation without load when the tension is put on without compromising power through the circuit (to be open circuit), the meter shall not register energy at any voltage between 0.8 · UN and 1.1 · UN.

section 34. Start up the meter to start and continue your registration by Un, PF = 1 (Polyphase meter with symmetrical loads) and a current which is equal to Ist.

section 35. Devices the electric energy that is measured, will be displayed in kilowatt-hours or megawatt-hours.

Chapter 3-requirements for electricity meters under the use section 36. Who is responsible the provisions of Chapter 3 and 4 targets the that use electricity meters as the basis for the calculation of the financial statements. With the user understood the person responsible for the measurement.

section 37. Requirements for approval of electricity meters under use Electricity meters that are sold for 1. January 2003 to either a) be approved according to. regulations 25. July 2002 No. 972 about requirements for electricity meters that are sold, collectively, the national compliance review, or b) be approved according to. regulation 26. April 2006 no. 468 about requirements for electricity meters that are sold or iht. regulations on the measurement units and measurements, hereinafter referred to as the MID match review.

section 38. Accuracy classes-uses Electricity meters with the national compliance review cf. § 37 letter a shall be used with level of accuracy 1 in the environment class "outdoor" and level of accuracy 1 or 2 in the environmental class "indoor".
Electricity meters with MID compliance review cf. § 37 letter b should be used with a class of accuracy that is specific for the application where the meter is used, cf. § 26.
It can still be used a better class of accuracy than use implies. In such cases, the meter must satisfy measurement accuracy for the class that is specified for the.

§ 39. The maximum allowed measure error For electricity meters with MID compliance review cf. § 37 letter b are for the corresponding maximum permissible measuring errors by sale jf. section 28.
For electricity meters with the national compliance review cf. § 37 letter a, the maximum allowable measurement error set out in table 8 and 9. 
Table 8 Maximum allowed measure error of single phase and three phase meters with symmetric load Power value PF cos (φ) maximum allowable measurement error in% level of accuracy 1 level of accuracy 2 Itr ≤ in ≤ Imaks. or 0, in Imaks 1Ib <