About AC contactor
The combination of AC contactor and relay control loop can remotely control or interlock related electrical equipment. At present, the most commonly used products are CJX2 series, CJ20 series, CJT 1 3TB series, B series and so on.
Coil burning should consider whether voltage stability is coil burning or contact burning. Is the working current fixed? Heating by electric heating tube can be divided into cold state and hot state.
Main power input 1L 1 3L2 5L3/ main power output 2T 1 4T2? 6T3/ A pair of normally closed auxiliary contacts 2 1Nc. 22Nc, you said there was a terminal there that was not marked. I have seen Zheng Tai series contactors. Two terminals are led out by A2 contactor coil A2, and there is one terminal at the top and one terminal at the bottom to facilitate wiring.
With 1 contactor, two sets of heating wires and two contacts, the contactor capacity can be smaller. If two groups of heating wires are connected in parallel with one contact, the contactor capacity needs to be doubled.