Heat exchange tube welding: DCEN, DCEP
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What do DCEN and DCEP mean for heat exchange tube welding power supplies?
DCEP: direct current positive connection; DCEN: direct current negative connection
On the contrary, since American standards are opposite to those in China, one refers to the power supply for the welding torch, while the other refers to the power supply for the workpiece
In DCEN, it is referred to as direct current positive connection, with the workpiece connected to the positive pole； For beautiful and efficient welding, connect the DC supply in reverse; connect the welding torch to the negative pole. So, although the names are opposite, the wiring of the electrodes remains the same. The original poster knows the answer very well; still asks questions
Instructions are provided on page 78 of the appendix to NB/T47014
Instructions are provided on page 78 of the appendix to NB/T47014