The correct answer is: A. Over load relay is connected in series and no volt relay in parallel with the load.
A manual shunt motor starter is a device that is used to start and stop a shunt motor. It consists of three main components: an overload relay, a no-volt relay, and a contactor.
The overload relay is connected in series with the motor. It is designed to protect the motor from overheating. If the motor current exceeds a certain value, the overload relay will open the circuit and stop the motor.
The no-volt relay is connected in parallel with the motor. It is designed to protect the motor from voltage fluctuations. If the voltage drops below a certain value, the no-volt relay will open the circuit and stop the motor.
The contactor is a switch that is used to connect the motor to the power supply. It is controlled by a pushbutton. When the pushbutton is pressed, the contactor closes the circuit and the motor starts. When the pushbutton is released, the contactor opens the circuit and the motor stops.
The overload relay and the no-volt relay are both safety devices. They are designed to protect the motor from damage. The overload relay protects the motor from overheating, and the no-volt relay protects the motor from voltage fluctuations.
The contactor is a switching device. It is used to connect the motor to the power supply. It is controlled by a pushbutton.