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Why are dry contacts are supplied in with HWA, EBA, EMA, Surgeloc, I-Line, and IMA surge protection devices.

Product Line: 
Surge Protective Devices (SPD's)

Dry contacts are for optional use of a remote monitoring or input to a building management system. However, this feature is optional and does not have to be wired up. The dry contacts are designed for a maximum voltage of 24 V dc / 24 V ac and a maximum current of 2 A. Higher energy applications may require additional relay implementation outside the SPD.
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