IEC 60974-11:2021 pdf free download Arc welding equipment – Part 11: Electrode holders
1 Scope
This part of IEC 60974 is applicable to electrode holders for manual metal arc welding with electrodes up to 1 0 mm in diameter.
It is not applicable to electrode holders for underwater welding.
This part of IEC 60974 specifies safety and performance requirements of electrode holders.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60050-1 51 , International Electrotechnical Vocabulary – Part 151: Electrical and magnetic devices
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 60974-1 , Arc welding equipment – Part 1: Welding power sources
3 Terms and definitions
For the purpose of this document, the terms and definitions contained in IEC 60050-1 51 and IEC 60974-1 , as well as the following apply.
3.1
electrode holder
insulated tool for manual metal arc welding intended to clamp and guide the electrode and to ensure electrical connection to it 3.2
3.2
head
part of the electrode holder having cavities or jaws or equivalent for insertion, orientation,clamping and electrical connection of an electrode
3.3
handle
part of the electrode holder designed to be held in the operator’s hand
3.4
lever
part which may be fitted to control the clamping device of an electrode holder
3.5
rated current
current assigned by the manufacturer that the electrode holders can accept at 60 % duty cycle without exceeding the permitted temperature rise
3.6
type A electrode holder
electrode holder in which no live part is accessible to the standard test finger as described in IEC 60529
3.7
type B electrode holder
electrode holder in which, deviating from type A, no live part is accessible at the head to a sphere with a diameter related to the maximum diameter of the electrode (see 8.1 b)
4 Environmental conditions
Electrode holders shall be capable of operation when the following environmental conditions prevail:
a) ambient air temperature:
– during welding: –1 0 °C to +40 °C;
b) relative humidity of the air: up to 50 % at 40 °C;
up to 90 % at 20 °C.
Electrode holders shall withstand storage and transport at an ambient air temperature of -20 °C to +55 °C without any damage to function and performance.
5 Type tests
5.1 Test conditions
All type tests shall be carried out on the same new and completely assembled electrode holder.
All type tests shall be carried out at an ambient air temperature between 1 0 °C and 40 °C.
The accuracy of measuring instruments shall be:
a) electrical measuring instruments: class 1 ; (±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) temperature measuring devices: ± 2 K.
5.2 Tests sequence
The type tests given below shall be carried out in the following sequence:
a) visual inspection;
b) temperature rise, see 9.1 ;
c) impact resistance, see 1 0.4;
d) insulation resistance, see 8.2;
e) dielectric strength, see 8.3.
IEC 60974-11:2021 pdf free download
