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Question:

Relay contact pressure

I would like to use 24VDC coil relay control 380VAc coil contactor, but the relay device on the standard contact is 240VAC, 28VDC, you can use it?

Answer:

The relay voltage is static test, the specification of the contact pressure is also static; Relay contact is in a normally open or normally closed state, that is, a simple understanding of the switch is normally open or often close the signal to open or disconnect the contact called the relay contacts. The relay contact is the most important part of the relay. Their performance is greatly influenced by factors such as contact material, applied voltage and current values (especially the voltage and current waveforms for contact excitation and de-energization), the type of load, the operating frequency, the atmospheric environment , Contact configuration and beating. If any of these factors can not satisfy the predetermined value, problems such as metal product accumulation between contacts, contact welding, wear, or rapid increase in contact resistance may occur.
May 9, 2017
Can be used, no problem, you do not understand and have, 240VAC 28VDC behind the stuff yo, It should be 240VAC 30A 28VDC 20A such a bar, that is, in the case of 240VAC can do 30A current switching capability, 28VDC when you can do 20A switching capacity, as long as the power does not exceed this range is no problem,
May 9, 2017
Can be used. Generally as long as no more than the contact current can be
May 9, 2017
Can not be used, must be used 24V relay drive 220V contactor, and then 220V contactor drive 380V contactor
May 9, 2017

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