National foreword
Brief history
Technical text
Contents
Foreword
1 Scope and object
1.1 Scope
1.2 Object
2 References
3 Definitions
3.1 Equipment for resistance welding and allied
processes
3.2 Processes allied to resistance welding
3.3 Input circuit (primary circuit)
3.4 Welding circuit (secondary circuit)
3.5 Portable hand-held resistance welding equipment
with incorporated transformer
4 Environmental conditions
5 Requirements and tests
5.1 Protection against electric shock
5.1.1 Clearances and creepage distances
5.1.2 Dielectric strength
5.1.3 Protection against direct contact (normal
service)
5.1.3.1 Liquid cooling
5.1.4 Protection against indirect contact (fault
condition)
5.1.4.1 Direct connection to the protective conductor
5.1.4.2 Connection to the protective conductor by an
impedance
5.1.4.3 Current operated earth leakage circuit breaker
5.1.4.4 Voltage operated earth leakage circuit breaker
5.1.4.5 Protective metal screen
5.1.4.6 Protective measures
5.1.4.7 D.c. resistance welding equipment
5.2 Additional user's requirements
5.3 Thermal rating of rectifier sets
5.4 Connection to the main supply
5.4.1 Supply voltage
5.5 Cycle start
5.6 Conductors of the welding circuit
5.7 Operation test
5.8 Instructions for use
Figures
1 Protective conductor directly at the welding
circuit
2 Protective conductor directly at welding
circuits
3 Protective conductor at welding circuits by
impedances
4 Protective conductor at welding circuits by
saturable auto-inductance
5 Protective conductor at welding circuits by
saturable auto-inductances with triggering of
the main breaker
6 Current operated earth leakage circuit breaker
7 Voltage operated earth leakage circuit breaker
8 Voltage operated earth leakage circuit breaker
for protective metal screen
Annexes
ZA (normative) Additional definitions
ZB (informative) National deviations
National appendix W
National appendix X
Cooperating organizations