Explain the behavior of a normally closed contact when energized.

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Multiple Choice

Explain the behavior of a normally closed contact when energized.

Explanation:
A normally closed contact is conducting in its de-energized state, and energizing the control coil produces a magnetic force that moves the contact to an open position, interrupting the circuit. So it opens when energized. This is the opposite of a normally open contact, which closes when energized. The contact itself is a switching element, not a protective device, though it can be used in protection circuits.

A normally closed contact is conducting in its de-energized state, and energizing the control coil produces a magnetic force that moves the contact to an open position, interrupting the circuit. So it opens when energized. This is the opposite of a normally open contact, which closes when energized. The contact itself is a switching element, not a protective device, though it can be used in protection circuits.

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