IEC 62052-31-2015 pdf download.Electricity metering equipment (AC) – General requirements, tests and test conditions – Part 31: Product safety requirements and tests.
1.2.1 Aspects Included In scope
NOTE I Subclause 1.2 is based on IEC 61010-1:2010, 1.2.
The purpose of the requirements of this standard is to ensure that hazards to the user and the surrounding area are reduced to a tolerable level.
Requirements for protection against particular types of hazard are given in Clauses 6 to 12 as follows:
a) electrical shock or burn (see Clause 6):
b) mechanical hazards and stresses (see Clauses 7 and 8);
C) spread of fire from the equipment (see Clause 9):
d) excessive temperature (see Clause 10);
e) penetration of dust and water (see Clause 11);
1) liberated gases, explosion and implosion (see Clause 12).
Requirements for components and sub-assemblies are specified in Clause 13.
Requirements for protection against hazards arising from reasonably foreseeable misuse are specified in Clause 14.
Risk assessment for hazards or environments not fully covered above is specified in Clause 15.
NOTE 2 Attention is drawn to the existence of addit,onal requirements specified by national authorities responsible for health and safety.
1.2.2 Aspects excluded from scope
This standard does not cover:
a) performance. reliability or other properties of the equipment not related to safety;
b) EMC requirements. which are covered by the relevant type testing standards;
NOTE 1 For EMC requirements and lest methods, see IEC 62052-11:2003, IEC 62052-21:2004 and IEC 62055-31:2005
c) protective measures for explosive atmospheres (see IEC 60079-0);
d) functional safety requirements:
e) effectiveness of transport packaging;
f) safety requirements of installations.
NOTE 2 The latter is generally subject to national regulation
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 I Subclause 1.4 is based on IEC 61010-1:2010, 14.
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);
9) 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.IEC 62052-31 pdf download.