250A High Voltage DC Contactor, 12V/24V coil

Features

• DC 12-900V rated load voltage of contact circuit.
• SPST-NO of contact form, 12 volt, 24 volt coil for selecting.
• Main contact voltage drop at 250A, not above 100mV.
• The connection of contact and coil need to be nonpolarity.
• Efficient coil, retentive power is only 2-2.3W, counter electromotive force is 0V.
• The joint way of the coil is very convenient.
• The coil has no counter force of electromagnetism.
• Compare to the similar products, this product is smallest and lightest.

Specifications

Installation Diagram (Unit: mm)
High Voltage DC Contactor Coil Schematic

Details

Tips: The contactor makes large noise when it works, how to solve?
Possible causes of the fault

1. The contactor works in high temperature for a long time.
2. The contactor is frequently operated.
3. Contact over range is too small.
4. The contact surface has impurities or is not smooth.
5. Pressure of contact spring is too small.
6. The three phase contact can't contact synchronously; short circuit at the load side. 

Maintenance method

1. Measure with a multimeter whether the power supply voltage of a contactor coil is lower than the required rated voltage, if lower, find causes on the circuit and adjust the voltage to the normal value.
2. Grind the suction face of the contactor with fine sand paper, clean up the sundries, spray few oil on the end face when necessary and then reassemble.
3. Reassemble and repair the contactor's action mechanism.
4. Weld the short-circuit ring and connect again.
5. Replace the contactor's iron core.
6. Reset the spring pressure of the contactor to a proper value.