This part of GB/T 17215 is only applicable to newly manufactured static active energy meters with accuracy levels of 0.2S and 0.5S for measuring AC active energy in a 50 Hz or 60 Hz network, and is only applicable to their type tests. This section is applicable to static energy meters used indoors, which are connected by a transformer installed in the same case with one measuring element and one or more registers. It is also applicable to one or more work indicators and one or more test outputs. If the instrument has a measuring element (multi energy meter) used to measure more than one type of electrical energy, or other functional units, such as maximum demand indicator, electronic rate register, time switch, pulse control receiver, data communication interface, etc., encapsulated in the same meter case, the corresponding standards apply to these functional units. Note: GB/T 1208.1-2006 specifies the measurement range of 0.01I. To 1.2I, or 0.05I. To 1.5I or 0.05I. To 21. The transformer and measurement range with accuracy levels of 0.2S and 0.5S are 0.011. To 1.21. Transformer. Due to the fact that the measurement range of the instrument and the transformer it is connected to must match, and only transformers with grades 0.2S and 0.5S have the accuracy requirements required for the operation of this standard instrument, the measurement range of the instrument is 0.011. to 1.21n. This part is not applicable to: a) active energy meters with a voltage exceeding 600 V at the wiring jumper terminal (multiphase instruments have line to line voltage); b) Portable instruments and outdoor instruments; c) Data interface for instrument register; standard table. Note: The requirements for reliability are in accordance with the IEC 62059 series of documents