AS 60974.1:2020 pdf free.Arc welding equipment Part 1: Welding power sources (IEC 60974-1:2017+AMD1:2019 CSV (ED.5.1) MOD).
4 Environmental conditions
Welding power sources shall be capable of delivering rated outputs at rated duty cycles when the following environmental conditions prevail:
a) range of ambient air temperature:
during operation: —10 °C to +40 °C;
b) relative humidity of the air:
up to 50 % at 40 °C;
up to 90 % at 20 °C;
C) ambient air, free from abnormal amounts of dust, acids, corrosive gases or substances, etc. other than those generated by the welding process;
d) altitude above sea level up to 1 000 m;
e) base of the welding power source inclined up to 100.
Welding power sources shall withstand storage and transport at an ambient air temperature of
—20 °C to +55 °C without any damage to function and performance.
NOTE Different environmental conditions can be agreed upon between the manufacturer and the purchaser and the resulting welding power source is marked accordingly (see 15.1). Examples of these conditions are: high humidity, unusually corrosive fumes, steam, excessive oil vapour, abnormal vibration or shock, excessive dust, severe weather conditions, unusual coastal or shipboard conditions, vermin infestation and atmospheres conducive to the growth of mould.
5.1 Test conditions
Tests shall be carried out on new, dry and completely assembled welding power sources.
The heating test defined in 7.1 and the thermal protection test defined in 8.5 shall be carried out at ambient temperature of 40 °C, see to lerances in 7.1 .2 e), with the exception of engine- driven power sources and fixed installation equipment, which shall be tested in accordance with the manufacturer’s specification.
Other tests shall be carried out at an ambient air temperature given in Clause 4 a).
Liquid-cooled welding power sources shall be tested with liquid conditions as specified by the manufacturer.
Unless otherwise specified, the equipment shall be supplied by a rated supply voltage with a tolerance of ±5 %.
5.2 Measuring instruments
The accuracy of measuring instruments shall be:
a) electrical measuring instruments: class I (±1 % of full-scale reading), except for the measurement of insulation resistance and dielectric strength where the accuracy of the instruments is not specified, but shall be taken into account for the measurement;
b) thermometer: ±2 K;
c) tachometer: ±1 % of full-scale reading.
5.3 Conformity of components
Refer to Annex P for conformity of components.
5.4 Type tests
Unless otherwise specified, the tests in this document are type tests.
The welding power source shall be tested with any ancillary equipment fitted that could affect the test results.
All type tests shall be carried out on the same welding power source except where it is specified that a test may be carried out on another welding power source.
As a condition of conformity, the type tests given below shall be carried out in the following sequence with no drying time between f), g) and h):
a) general visual inspection, see 3.1.7;
b) insulation resistance, see 6.1 .4 (preliminary check);
c) enclosure, see 14.2;
d) handling means, see 14.3;
e) drop withstand, see 14.4;
f) protection provided by the enclosure, see 6.2.1;
g) insulation resistance, see 6.1.4;
h) dielectric strength, see 6.1.5.AS 60974.1 pdf download.