1, the choice of the dc contactor, need according to the types and to determine the weight of the load current, at the same time the main contact of the dc contactor, need to undertake the corresponding calculation formula to draw current, if the choice of contactor product is too complicated to operate, need to turn over and over again, the current size of need is the main contact level.
2, DC contactor coil voltage and the main contact voltage cannot be equal, if less use · Electrical products, wiring is relatively simple, can use 220 20V rated voltage. If the wiring is more complex, more electrical appliances are used at the same time, and the service time is long, 110V coil contactor can be selected.
Conactor definition: a period during which a jump can occur in one or more electrical output circuits when the input (or excitation) satisfies certain specified conditions (input: electrical, optical, magnetic, thermal, etc.). In short, a relay is an electronic switch. Contactor role: 1) the isolation between the input and output circuit (2) signal conversion (from off to on or vice versa) 3) increase output circuit (i.e. several load switch or switch different power load) 4) 5) repeated signal switching different voltage or current load 6) retain 7) locking circuit output signal 8) provides remote control dc contactor features: high voltage, high current, long life.
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