AS 62052.21:2018 pdf free
AS 62052.21:2018 pdf free.Electricity metering equipment (ac) – General requirements, tests and test conditions
Where the tariff and load control equipment is designed to enable replacement of the back-up power supply, it shall be designed in such a way that it does not lose the time during the replacement of the back-up power supply, even if a power outage occurs during this process.The time necessary for the replacement (with back-up power supply disconnected) shall be less than 5 min.
Maximum demand indicator switches shall withstand 400 000 switching operations at 20 VA and a power factor of 0,5 lagging, when the shortest programmable integration period is 15 min. The number of operations has to be increased proportionally when the period is shorter (i.e. 600 000 operations for an integration period of 10 min or 1 200 000 for 5 min).
For the test of the maximum demand indicator switch contacts (or their electronic equivalent),the supply voltage to the test circuit shall be set to the rated breaking voltage. The loading impedance consists of a resistance and inductance in series in order to get a power factor of 0,5. The current in the test circuit has to be adjusted to such a value that, under rated breaking voltage, the apparent power obtained is 20 VA. The number of operations to be carried out is related to the shortest programmable integration period but has to be at least 400 000.
The test is passed if after these tests the power loss of the output elements under rated breaking current does not exceed 3 W or the voltage drop across the output elements does not exceed 1 V and the open contact can withstand an a.c. test voltage of 1 000 V r.m.s.for 1 min.
The switch shall be tested with the fully assembled tariff and load control equipment under reference condition and shall be connected in a test circuit, which comprises essentially the supply source and a resistive load. The supply voltage to test the circuit shall be set at 34,5 V and the resistive load adjusted for a current of 30 mA.AS 62052.21 pdf free downlaod.
