Can I get a contactor whose controlling signal is 230V AC to control 110V DC?
The purpose for the above requirement is because the power plant where I work has a 110V DC supply for emergency lighting purposes in case of system failure. This automatic operation does not work and the DC supply has to be turned ON manually. If a contactor with 230V AC control signal is available, I won’t have to build a separate electronic circuit for controlling the contactor. When 230V AC fails, 110V DC supply should turn ON with out using other hardware except a contactor. If other procedure is available to solve this problem, please share it with me. Thank you all for your help 
You are unclear as to how you switch the supply on.
Is the supply already on, and you are switching the DC output? Or are you turning on the AC power to the DC supply so that it’s DC output powers up?
I think the latter case is what is happening, at a guess, so your contactor does NOT need DC contacts, but rather needs AC contacts. This is an important difference. DC contacts are difficult to find.
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Mill-Drill and Westinghouse 110V DC Generator Painting
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