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A) Main Circuit                B)Control Circuit with momentary contact control (Push button) C) Control circuit for maintained contact S0 : ‘OFF’ Push button S1 : ‘ON’ Push button S  : Maintained command switch K1 : Main contactor F1 : Main circuit fuse F2 : Overload relay F3 : Control circuit fuse This is by far the most common starting method available on the market. The starting equipment consists of only a main contactor and thermal or electronic overload relay. The disadvantage with this method is that it gives the highest possible starting current. A normal value is between 6 to 7 times the rated motor current but values of up to 9 or 10 times the rated current exist. Besides the starting current there also exists a current peak that can rise up to 14 times the rated current since the motor is not energised from the the first moment when starting.The values are dependent on the design and size of the motor, but in general, a smalle...

             Another method of reducing the starting current of a motor is to step down the voltage to the motor winding through the auto transformer such as is called the “Auto Transformer Reduced Voltage Starter”. This method is applied to high motor with large starting current. Control Operation              Figures below (A) and (B) illustrate the power and control circuit respectively of an “Auto Transformer Reduce Control Voltage Starter”. The control circuit consist of TR timers, contactors S, Y, and R. (A) Power circuit of the “Auto Transformer Reduce Voltage Starter”. Pressing the start push button will energize contactor S and timer TR. Contactor Y is also energized through normally closed contact TR (8-5). Instantaneous contact TR (1-3) will close immediately to maintain the circuit continuously energized. Contact Y (11-12) will open to ensure that contactor R will not be energized. Contact S (1-2,3-4,5-6) and Y (1-2,3-4,5-6) will close to connect the auto transformer T1, T...

 Why fluorescent lamp light blinking before long? Because Fluorescent light removes electrons and hit the wall of a glass tube coated with phosphors that emit light plastic. To throw a flow of electrons in the metal out in need of very high voltage electricity. Because not enough to voltage that we use 220 ​​volt, fluorescent lamp starter, grafted on to stop a while to produce electricity in a high electric voltage. Fluorescent light starter component's High-voltage electric is cutt off from current to flow. Therefore , when Fluorescent Lamps, electrical connecting repeatedly cut, so look at our eyes blink, while starter is generally light but, when the lights go out starter that is lit exactly goes on.