Cabinet of Ministers Regulations No. 666 in Riga august 22, 2006 (pr. No 43) provisions on metrological requirements active electrical energy meters are Issued in accordance with the law "on a uniformity of measurements" the second subparagraph of article 6 and the law "on conformity assessment" 7. the first paragraph of article 1. determine the metrological requirements and the conformity assessment procedures of active electrical energy meters intended for active electrical energy counting residential buildings as well as commercial and light industrial use, before the active electrical energy meters are placed in the internal market as well as placed in service. 2. Depending on the measuring technology of electricity meters can be used with mērmaiņ. 3. These provisions shall not apply to mērmaiņ. 4. the meaning of these provisions: 4.1 active electrical energy meter-measuring tool that measures the electrical circuit the active electrical energy consumed in quantity;
4.2. I-through counter flowing electric strength;
4.3. In the reference power-strength for which the meter is intended for use with strāvmain;
4.4. Ist-the lowest I value at which the meter registers active electrical energy if the power factor is equal to one (multi-phase meters with balanced load);
4.5. Imin-I the value of I above which the error of the measurement value of the maximum permissible error limits (hereinafter – CPC) (multi-phase meters with balanced load);
4.6. Itr-I value above which according to the class index of the meter measurement error is the minimum value for the MPEs;
4.7. Imax-the maximum value of I at which the measurement error is the MPEs;
4.8. U-meter supply voltage;
4.9.-fixed reference voltage And;
4.10. f-power supply frequency;
4.11. fn-power supply in a particular reference frequency;
4.12. PF-power factor, cos-cosine of the phase difference between I and u. 5. Essential requirements of active electrical energy meters set in haunted Act on normat metrological requirements measuring instruments. Particular requirements for active electrical energy meters set in the annex to these provisions. 6. Active electrical energy meters comply with the requirements of these rules and regulations in the Act on the metrological requirements measuring instruments. 7. Persons providing electricity system services, you must ensure that this active electrical energy meters are installed according to the requirements of these rules and regulations in the act as the means of measurement, metrological and that active electrical energy meters provides accurate for or predicted consumption measurements. 8. The manufacturer may choose conformity assessment procedures of modules B + F or B + D or H1. Module specific regulatory provisions on metrological requirements measuring instruments. 9. Active electrical energy meters, which approved the type issued to you up to the date of entry into force of the rules, allowed to put on the market and active electrical energy meters, which made first-time verification, allowed to pass until they use the type approval expiration date, but if it is not set, the-by 2016 of 30 October. 10. The entry into force of the provisions by 30 October 2006. Informative reference to European Union Directive provisions included in the law arising from the European Parliament and of the Council of 31 March 2004, Directive 2004/22/EC on measuring instruments. Prime Minister a. Halloween economic Minister a. Štokenberg annex a Cabinet of 22 august 2006 Regulation No. 666 of specific metrological requirements 1. Manufacturer indicates active electrical energy meters class index. The class indices are defined as follows: class A, class B and class C. 2. the manufacturer shall indicate the meter under certain operating conditions, and the value of fn In, Imin, Itr ist, and Imax. If the value of such a power, the meter operation complies with the conditions laid down in this annex, table 1. table 1 operating conditions of different class meter class A class B class C direct the closing meters ist