BS EN IEC 60974-2:2019 pdf download.Arc welding equipment Part 2:Liquid cooling systems.
7 Mechanical provisions
7.1 General
As specified in Clause 14 of lEC 60974-1:2017.
The test shall be carried out with cooling liquid.
7.2 Cooling liquid overflow
When filling the cooling system in accordance with the manufacturer's instructions,overflowor spillage shall not result in electric shock.
Conformity shall be checked by the following treatment and test. The liquid container iscompletely filled.A further quantity of liquid equal to 15 % of the capacity of the container or0,25l, whichever is the greater, is then poured in steadily over a period not to exceed 60 s.lmmediately after this treatment, the equipment shall pass the dielectric strength test of 6.1.5between input circuits and exposed conductive parts.
7.3 Hose coupling devices and hose connections
lf hose coupling devices or hose connections，which often have to be undone,are placedabove or near to live parts，these live parts shall be protected from cooling liquid by splashproof enclosures，with drains or other appropriate measures.An exception is made for liveparts of the welding circuit.
8 Cooling system
8.1 Rated maximum pressure
The manufacturer shall determine the rated maximum pressure attainable by the coolingsystem (see 11.3 c), box 12).
Conformity shall be checked by measuring the pressure when the outlet is blocked.
