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Walter Jacob
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Join Date: May 2012
Posts: 5

Whats the function of a changeover switch in an Evacuation Siren system?

05/23/2012 6:07 PM

Whats the function of a changeover switch in an Evacuation Siren system?
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RAMConsult
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Engineering Fields - Power Engineering - New Member

Join Date: May 2007
Location: NYC metropolitan area.
Posts: 3230
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#1

Re: Whats the function of a changeover switch in an Evacuation Siren system?

05/23/2012 7:36 PM

Probably to "changeover" from utility power to backup power, if it's an old Civil Defense siren it most likely has a universal motor that runs on both AC and DC.

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