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Will TVSS units give an indication of a phase failure? Do they have auxiliary contacts for this?
All Surgelogic HWA series, EBA series, EMA & IMA series TVSS units will respond to a loss of one phase or two phases, and will close (or open) a set of dry contacts, but will not respond to the loss of all three phases. A phase failure relay would be needed for comprehensive phase failure protection.


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Schneider Electric USA

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