The centrifugal switch is used to disconnect the starting winding of the motor once the motor approaches its normal operating speed i.e 50% – 70% speed.
Susceptance is symbolized by the capital letter B. It is the reciprocal of AC reactance. Susceptance, like reactance, can be either capacitive or inductive. In the case of a magnetic field, the susceptance is inductive. In the case of an electric field, the susceptance is capacitive. Capacitive susceptance is symbolized BC and inductive susceptance is symbolized BL. In the case of a magnetic field, the susceptance is inductive. In the case of an electric field, the susceptance is capacitive. Inductive susceptance is assigned negative imaginary number values, and capacitive susceptance is assigned positive imaginary number values.
The formula for inductive susceptance is
The unit of Inductive susceptance is Siemen or Mho.
Supply Voltage = 120 V
Current I = 1.5 A
Total Resistance R = V/I = 120/1.5 = 80 Ω
Now resistance of 3 lamp be R1, R2, & R3
Req = R1 + R2 + R3
80 = 30 + 30 + R3
R3 = 20 Ω
Applying KVL on the above circuit
120 = 1.5(R1 + R2) + 1.5R3
120 = 1.5(30 + 30) + 1.5R3
120 = 90 + 1.5R3
R3 = 30/1.5
R3 = 20 Ω