This standard is applicable to equipment for resistance welding and allied processes intended for use in industrial and light industrial environments which are connected to mains supplies with rated voltages up to 1 000 V a.c. rms. This standard does not define safety requirements.
Resistance welding equipment type tested in accordance with, and which has met the requirements of this standard, shall be deemed to be in compliance for all applications.
The frequency range covered is from 0 Hz to 400 GHz.
This product EMC standard for resistance welding equipment takes precedence over all aspects of the generic standards and no additional EMC tests are required or necessary.
NOTE 1 Typical allied processes are resistance hard and soft soldering or resistance heating achieved by means comparable to resistance welding equipment.
NOTE 2 Limit values are specified for only part of the frequency range.
Resistance welding equipment are classified as class A and class B equipment.
1 Emission
The objective of this standard is to specify:
a) test methods to be used in conjunction with EN 55011:1998 and its amendments A1:1999 and A2:2002 to determine electromagnetic emission;
b) relevant standards for harmonic current emission, voltage fluctuations and flicker.
NOTE 1 The limits in this standard may not, however, provide full protection against interference to radio and television reception when the resistance welding equipment is used closer than 30 m to the receiving antenha(e).
NOTE 2 In special cases, when highly susceptible apparatus is being used in close proximity, additional mitigation measures may have to be employed to further reduce the electromagnetic emissions.
2 Immunity
The objective of this standard is to define immunity requirements and test methods for continuous and transient, conducted and radiated disturbances including electrostatic discharges.
NOTE These levels do not, however, cover extreme cases which are extremely rare.
BS EN 50240:2004 history
2015BS EN 62135-2:2015 Resistance welding equipment. Electromagnetic compatibility (EMC) requirements
2008BS EN 62135-2:2008 Resistance welding equipment. Electromagnetic compatibility (EMC) requirements
2004BS EN 50240:2004 Electromagnetic compatibilty (EMC) - Product standard for resistance welding equipment