Question

Explain, Coil Inrush and Sealed Currents

Answer 1

Explanation:

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When the solenoid coil is first energized and the air gap is at its widest point, the magnetic circuit is incomplete, the AC resistance or impedance is low and the electrical current demanded by the coil is high. This high current level is called “inrush current” and only occurs in AC circuits

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A related term sealing current (aka wetting current or fritt current) is widely used in the telecommunication industry describing a small constant DC current (typically 1-20 mA) in copper wire loops in order to avoid contact oxidation of contacts and splices. It is defined in ITU-T G.

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Answer 2

Answer:

COIL INRUSH:

When the solenoid coil is first energized and the air gap is at its widest point, the magnetic circuit is incomplete, the AC resistance or impedance is low and the electrical current demanded by the coil is high. This high current level is called “inrush current” and only occurs in AC circuits

SEALED CURRENTS:

A related term sealing current (aka wetting current or fritt current) is widely used in the telecommunication industry describing a small constant DC current (typically 1-20 mA) in copper wire loops in order to avoid contact oxidation of contacts and splices. It is defined in ITU-T G.

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