relay coil

He has to hand-wind his own relay coils to do this.

A track circuit typically has power applied to each rail and a relay coil wired across them.

Then it hit me- it looked like an oversized subspace relay coil."

The relay coils are connected by wire to the spring piece, S, and the armature lever is connected to earth.

When the section is unoccupied, the relay coil completes an electrical circuit, and is energized.

The snubber diode is wired in parallel with an inductive load (such as a relay coil or electric motor).

Each leg of the pair is connected to a relay coil which detect the signalling on the line (dialling, handset off-hook etc.).

When a train is present, its axles short (shunt) the rails together; the current to the track relay coil drops, and it is de-energised.

Four reeds were generally present inside each relay coil, two for the speech-path, one for holding the path and one for metering.

In a manually operated switchboard, this current flowed through a relay coil actuating a buzzer and lamp on the operator's switchboard.

It is possible to manually operate the UV 'Light Box' by operating switch S3, which completes the circuit to the relay coil and also illuminates D8.

There is a battery, C, and a key, K. When the key is depressed, current flows through the relay coils at A, but no magnetism is produced, as they oppose each other.

A forced-guided contacts relay has relay contacts that are mechanically linked together, so that when the relay coil is energized or de-energized, all of the linked contacts move together.

When used with a DC coil relay, a flyback diode can cause delayed drop-out of the contacts when power is removed, due to the continued circulation of current in the relay coil and diode.