Thermal Relay

This control also serves as a safety cut-out. If the engine should use too much current, resistance heating cables (for a bimetallic strip. Heated bimetallic strip will open the contact points and stop the motor.

In the second type, the resistance of the wire is attached in series with both the starting and running with the windings. other, Jogging windings. When it's cold, both sets of contact points closed. Resistance of the wire is mounted near the bimetallic strip. In series with the source and running winding. It is the correct size and distance from a bimetallic strip. Therefore the heat opens the starting winding contact points when the engine reaches its optimal operating speed.

This control also serves as a safety cut-out. If the engine should use too much current, resistance heating cables (for a bimetallic strip. Heated bimetallic strip will open the contact points and stop the motor.

In the second type, the resistance of the wire is attached in series with both the starting and running with the windings. Fig. 8-65. Thermal starting relay with two bimetallic strip. Inheating wire. -Running winding bimetal. C Starting winding bimetal. PPower wire connection. RRunning winding connection. SStarting winding connection. On top, the Starling, the circuit is open, the device works under the control of the winding. In fact, both chains are open and have been drawing too much current. The tension of the wire when it's cold, keeps both sets of points of contact is closed.

When passing current, resistance of the wire is heated and expands or stretches. On the given parameter, loose wires opens the starting winding contacts. This control also serves as a safety cut-out. If the engine should use too much current, cable stretched enough to open the running winding points of contact. Full wiring diagram of the refrigerator with the help of thermal relay shown in Fig. 8-67.

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