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Identifying mechanically held contactor versus electrically held contactor

How to tell whether lighting contactor is mechaniclly held or electrically held

Product Line:
8903 Lighting ontactors

Products sold and used in the United States

Catalog numbers are not always known and visual identification must be performed.
Electrically held contactors have a single coil which is continuously energized to engage the power contacts.  Mechanically held contactors have two different coils, a latching coil and an unlatching coil.  These coils are only momentarily energized to engage or disengage the power contacts.
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