AS 62052.31:2017 pdf free.Electricity metering equipment (AC)- General requirements, tests and test conditions Part 31: Product safety requirements and tests (IEC 62052-31:2015 (ED.1.0) MOD).
1.3 Verification
NOTE This subclause reproduces IEC 61010-1:2010. 1.3.
This standard also specifies methods of verifying that the equipment meets the requirements of this standard, through inspection, type tests, risk assessment and routine tests. See Clauses 4, 15 and Annex I respectively.
1.4 Environmental conditions
1.4.1 Normal environmental conditions
NOTE 1 Subclause 1.4 is based on IEC 61010-1:2010. 1.4.
This standard applies to metering equipment designed to be safe at least under the following conditions:
a) indoor use;
b) altitude up to 2 000 m;
c) climatic conditions according to 3K5, but with low air temperature -10 °C; see
IEC 60721-3-3:1994;
NOTE 2 3K5 specifies low air temperature -5 °C, high air temperature +45 °C, low relative humidity 5 %. high
relative humidity 95 %. See the climatogram in IEC 60721-3-3:1994, Figure B.5. d) voltage fluctuations up to -20…15 % of the nominal voltage;
The equipment may have several nominal voltages.
e) transient overvoltages up to the levels of overvoltage category Ill;
f) transient overvoltages occurring on the mains supply (see 6.7.1.1);
g) applicable pollution degree of the intended environment (pollution degree 2 in most cases).
Manufacturers may specify more restricted environmental conditions for operation; nevertheless, the equipment shall be safe within these normal environmental conditions.
1.4.2 Extended environmental conditions
This standard applies to metering equipment designed to be safe not only under the environmental conditions specified in 1.4.1, but also under any of the following conditions for which the equipment is rated by the manufacturer:
a) outdoor use;
b) altitude above 2 000 m;
C) climatic conditions according to 3K6; see IEC 60721-3-3:1994;
NOTE 1 3K6 specifies low air temperature -25 ec high air temperature +55 °C, low relative humidity 10 %, high relative humidity 100 %. See the climatogram in IEC 60721-3-3:1994, Figure 8.6.
d) transient overvoltages higher than what is required for overvoltage category Ill.
NOTE 2 Under such circumstances, additional protection can be provided by external overvoltage protection elements. However, this is beyond the Scope of this standard. Information on the effects of installing varistors in large quantities on the network can be found in IEC TR 61000-2-3:1992, 6.6.1.AS 62052.31 pdf downlaod.