AS 62052.11:2018 Electricity metering equipment (ac)— General requirements, tests and test conditions
5.1 2.1 Name-plates
Every meter shall bear the following information as applicable:
a) manufacturer’s name or trade mark and, if required, the place of manufacture;
b) designation of type (see 3.1 .8) and, if required, space for approval mark;
c) the number of phases and the number of wires for which the meter is suitable (for example, single-phase 2-wire, three-phase 3-wire, three-phase 4-wire); these markings may be replaced by the graphical symbols given in IEC 60387;
d) the serial number and year of manufacture. If the serial number is marked on a plate fixed to the cover, the number shall also be marked on the meter base or stored in the meter’s non-volatile memory;
e) the reference voltage in one of the following forms:
– the number of elements if more than one, and the voltage at the meter terminals of the voltage circuit(s);
– the rated voltage of the system or the secondary voltage of the instrument transformer to which the meter is intended to be connected.
Information under points d) to k) shall be marked on a name-plate preferably placed within the meter. The marking shall be indelible, distinct and legible from outside the meter.
If the meter is of a special type (for example in the case of a multi-rate meter, if the voltage of the changeover device differs from the reference voltage), this shall be specified on the name-plate or on a separate plate.
If the instrument transformers are taken into account in the meter constant, the transformer ratio(s) shall be marked.
5.1 2.2 Connection diagrams and terminal marking
Every meter shall preferably be indelibly marked with a diagram of connections. If this is not possible reference shall be made to a connection diagram. For polyphase meters, this diagram shall also show the phase sequence for which the meter is intended. It is permissible to indicate the connection diagram by an identification figure in accordance with national standards.