Sensational 2 Wire Control Circuit
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As you can see in the schematic diagram of 2 way switch circuit below the common of both the switches are short circuited.
2 wire control circuit. The contactor k remains energized as long as the control contact is in a close condition. The control contact may be a level switch contact or a temperature switch contact. A good example of this type of control is the single phase manual starter shown in figure 3 1.
Pin1 of both the switches are connected with the phase or live wire and pin2 of both the switches are connected with the one end of the lamp. The protective device for the control wires have to be in acc. If the single pole switch marked s1 is left open then the liquid level switch in the circuit will now be the control.
2 wire control and 3 wire control. This could be for example from a thermostat on a refrigerator a float switch on a water tank or a pressure switch on an air compressor. With the cross section of the control wires.
The other end of the lamp is connected with the neutral line of ac power supply. The two wire circuit in configuration 2 operates as follows. 2 wire control vs 3 wire control.
Two wire control is usually used for a simple on off device such as a toggle switch float switch thermostat or other device that would switch off of a high low limit. Two wire control circuits also control the operation of three phase motors by controlling the power applied to the motor starter coil. This video walks you through the basic 2 wire and 3 wire control for 3 phase motor controllers.
A two wire control circuit can be a simple switch that makes or breaks connection to a motor figure 18 1. When to use 2 wire control and when to use 3 wire control. If the single pole switch is toggle closed the motor starter will start and stay on for as long as the single pole.
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