AS 62053.22:2018 pdf free download – Electricity metering equipment (ac) – Particular requirements
1 Scope
This part of IEC 62053 applies only to newly manufactured static watt-hour meters of accuracy classes 0,2 S and 0,5 S, for the measurement of alternating current electrical active energy in 50 Hz or 60 Hz networks and it applies to their type tests only. It applies only to transformer-operated static watt-hour meters for indoor application consisting of a measuring element and register(s) enclosed together in a meter case. It also applies to operation indicator(s) and test output(s). If the meter has a measuring element for more than one type of energy (multi-energy meters), or when other functional elements, like maximum demand indicators, electronic tariff registers, time switches, ripple control receivers, data communication interfaces, etc. are enclosed in the meter case, then the relevant standards for these elements also apply.
It does not apply to:
– watt-hour meters where the voltage across the connection terminals exceeds 600 V (line-to-line voltage for meters for polyphase systems);
– portable meters and meters for outdoor use;
– data interfaces to the register of the meter;
– reference meters.
The dependability aspect is covered by the documents of the IEC 62059 series.
The safety aspect is covered by IEC 62052-31 :201 5.
Regarding acceptance tests, see IEC 62058-1 1 :2008 and IEC 62058-31 :2008.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60044-1 :1 996, Instrument transformers – Part 1: Current transformers
IEC 62052-1 1 :2003, Electricity metering equipment (AC) – General requirements, tests and test conditions – Part 11: Metering equipment Amendment 1 (201 6)
IEC 62052-31 :201 5, Electricity metering equipment (AC) – General requirements, tests and test conditions – Part 31: Product safety requirements and tests
6 Climatic conditions
The conditions given in IEC 62052-1 1 apply.
7 Electrical requirements
In addition to the electrical requirements in IEC 62052-1 1 , meters shall fulfil the following requirements.
7.1 Power consumption
The power consumption in the voltage and current circuits shall be determined at reference conditions given in 8.5 by any suitable method. The overall maximum error of the measure- ment of the power consumption shall not exceed 5 %.
The active and apparent power consumption taken at reference temperature and reference frequency, by each voltage circuit at reference voltage and by each current circuit at rated current, shall not exceed the values shown in Table 1 .
7.2 Influence of short-time overcurrents Short-time overcurrents shall not damage the meter. The meter shall perform correctly when back to its initial working condition and the variation of error at rated current and unity power factor shall not exceed 0,05 %. The test circuit shall be practically non-inductive and the test shall be performed for polyphase meters phase-by-phase. After the application of the short-time overcurrent with the voltage maintained at the terminals, the meter shall be allowed to return to the initial temperature with the voltage circuit(s) energized (about 1 h). The meter shall be able to carry for 0,5 s a current equal to 20 I max with a relative tolerance of +0 % to –1 0 %.
The test shall be carried out as follows: after the voltage circuits have been energized at reference voltage for at least 2 h without any current in the current circuits, the maximum current shall be applied to the current circuits. The meter error shall be measured at unity power factor immediately after the current is applied and then at intervals short enough to allow a correct drawing to be made of the curve of error variation as a function of time. The test shall be carried out for at least 1 h, and in any event until the variation of error during 20 min does not exceed 0,05 %. The same test shall then be carried out at 0,5 (inductive) power factor.