Three-phase AC electric welder no-load automatic stop control circuit

Published:2011/6/22 19:09:00 Author:TaoXi | Keyword: Three-phase, AC, electric welder, no-load, automatic stop, control circuit | From:SeekIC

The circuit is as shown in the figure. The subprime coil clamp line port of the electric welder's transformer is connected with the landline through the welding rod to form the short circuit, the relay ZJ releases. The normally closed contact point ZJ2 closes to make the AC contactor CJ to close, and it locks itself through the normally open contact point CJ1, the major loop is connected, the electric welder's transformer produces the normal voltage and current, so you can do the welding work. After the welding stops, because the open-circuit (composed of the clamp line port and the landline port) voltage increases, so the relay ZJ gets power to close through the AC contactor's normally open contact point CJ4.



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