YUEQING WINSTON ELECTRIC CO.,LTD.
Yueqing Winston Electric Co., Ltd Proximity sensor,switching power supply,voltage stabilizer,motor soft starter,frequency inverter,float switch,AC magnetic contactor, thermal overload relay, terminal
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WCT series home AC contactor is a kind of control electric appliance which is used for long distance switch on and break off sense or low load, electric resistance furnace, household appliances and similar application.
| WCT contactors-50Hz | |||||
| Type | Raring(In) | Control voltage (VAC)(50Hz) | Consumption | Max. power | |
| AC7a | Holding | Inrush | |||
| 4P | 40 A | 24 | 6.5 VA | 53 VA | 2.1 W |
| 220...240 | 6.5 VA | 53 VA | 2.1 W | ||
| Power circuit | ||
| Voltage Rating(Ue) 1P, 2P | 250VAC | |
| 3P, 4P | 400VAC | |
| Endurance(O-C) | ||
| Maximum number of switching operation a day | 100 | |
| Additional characteristics | ||
| Insulation voltage(Ui) | 500VAC | |
| Pollution degree | 2 | |
| Rated impulse withstand voltage(Uimp) | 2.5kV(4 kV for 12/24/48V AC) | |
| Degree of protection (IEC 60529) | Device only | IP20 |
| Device in modular enclosure | IP40 | |
The working principle of the contactor: Upon energization, the circuit with current will create a magnetic field and generate sufficient magnetic adhesion to overcome counterforce, close armature and connect the contacts. When the coil voltage dies out or reduces to a certain value(i.e. at the state of voltage release), for the flux generated at the end face of the armature decreases, the magnetic adhesion becomes weaker than the counterforce generated by the reaction spring, contact spring, etc. Under the counterforce, the armature will be released and free from the field yoke, and then the contacts will be disconnected.
