Air break contactor with different capacity usually used to supply the electric current to motor through in it to prevent high power load to motor.
Ampere & Voltage Meter:
Moving coiled meter 90 degrees or 240 degrees with centred magnet core & spring mounted jewel suspension to order & describe the ampere & voltage flew in the device
Bakelite Terminal Connectors:
Terminal connector resisting screw thread usually used to supply current flow from top end to Button end of the pole & prevent one pole to other pole to aoide short circuit.
Start capacitors briefly increase motor starting torque and allow a motor to be cycled on and off rapidly. A start capacitor stays in the circuit long enough to rapidly bring the motor up to a predetermined speed, which is usually about 75% of the full speed, and is then taken out of the circuit, often by a centrifugal switch that releases at that speed. Afterward the motor works more efficiently with a runing capacitor.
Some single-phase AC electric motors require a "run capacitor" to energize the second-phase winding (auxiliary coil) to create a rotating magnetic field while the motor is running
Miniature Circuit Breaker(MCB)
MCB is circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit. Its basic function is to interrupt current flow after a fault is detected.