What is BS EN 62054-21-Electricity metering about?
BS EN 62054 discusses electricity metering (AC). BS EN 62054-21 is a part of the BS EN 62054 multi-series and discusses requirements for time switches. BS EN 62054-21 specifies particular requirements for the type test of newly manufactured indoor time switches with operation reserve that are used to control electrical loads, multi-tariff registers, and maximum demand devices of electricity metering equipment.
BS EN 62054-21 covers time switches with analogue mechanical dials or electronic digital displays that are synchronous, or crystal controlled. When using BS EN 62054-21 in conjunction with IEC 62052-21, the requirements of BS EN 62054-21 take precedence over those of IEC 62052-21 regarding any item already covered in it. In the case where time switch functionality is integrated into multifunction electricity metering equipment, the relevant parts of BS EN 62054-21 apply.
Note 1: BS EN 62054-21 gives no requirements for constructional details internal to the time switch.
Note 2: BS EN 62054-21 does not cover the acceptance tests and the conformity tests. Nevertheless, an example of what could be an acceptance test is given.
Who is BS EN 62054-21 -Electricity metering for?
BS EN 62054-21on electricity metering (AC) is useful for:
- Meter manufacturers
- Utility providers
- Quality control personnel
Why should you use BS EN 62054-21-Electricity metering?
The time switch keeps the real-time, it may keep the date, it may be capable of handling leap years, it may support daylight saving, i.e., it modifies the deviation of local time to GMT according to the relevant regulations. The time switch may have a synchronization capability. The time switch also holds a schedule of switching actions, which may be specified in terms of time, day of the week, date within a month or a year. The time switch controls the output elements depending on the time and the schedule of switching actions stored.
BS EN 62054-21 guides you with the standard electrical values for electrical metering. BS EN 62054-21 provides you guidance on mechanical, climatic conditions, requirements, and tests. BS EN 62054-21 provides electrical requirements and tests that include supply voltage, heating, insulation, output elements, functional requirements and tests, electromagnetic compatibility, and radio interference suppression BS EN 62054-21 also provides you test conditions and type test. BS EN 62054-21 helps you to meet the particular requirements to comply with the standards.