28 September 2021
How to tell whether lighting contactor is mechaniclly held or electrically heldProduct Line:
8903 Lighting ontactorsEnvironment:
Products sold and used in the United StatesCause:
Catalog numbers are not always known and visual identification must be performed. Resolution:
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.