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When we need to turn on electronic equipment with a large initial power such as television, water pump motor and so on, but the power rating we have is small, then the MCB will soon break out our electricity current.


As a solution, then we can use current limiting circuit start, until the steady state. When steady conditions have achieved the work of this current limiting circuit we switch off.

 

Soft Starter for Initial High Load Current

 

 

 

 

 

 

Figure 1. Automatic Soft Starter Using Two Transistor.

 

 

 

 

Note: The used relay is 12 volt 5 ampere. NC directly connected to the load, whereas NO is connected to resistor 1 K

 

 

 

 

 

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