Primary Resistance Starter - Operation, Wiring Diagram, Advantages and Disadvantages: This method of primary resistance starter of a polyphase cage motor is very simple and provides smooth acceleration of the…
Starting of Electric Drives: The most important processes associated with controlled electric drives are (i) starting, (ii) speed control (iii) braking, (iv) reversal of direction of rotation. All these are…
Nature of Electric Supply: The nature of electric supply available may be 3-phase ac, single-phase ac or dc. In case three-phase ac supply is available, polyphase induction motor, squirrel cage…
Protective Devices and Interlocks: Protective devices must be incorporated in the control circuit (or circuits) to interrupt the flow of current to the motor to guard against overloads or other…
Power Supply for Electrolytic Process: Power Supply for Electrolytic Process is direct current and at very low voltage. The power required for electrodeposition is usually very small (between 100 and…
Composite System of Track Electrification: The composite system of track electrification which comprise are the dc system the single phase ac system the three phase ac system and the composite…
Different Groups of Systems of Electric Traction: As already mentioned, systems of electric traction may be divided into two main groups. (1) The group consisting of vehicles which receive electric…
Electric Welding Machine Working Principle: The electric welding machine sets may be either dc or ac type. 1. DC Welding Sets: Such sets are of two types namely (i) generator…