Power Circuit Diagram Of Direct Online Starter With

By | September 11, 2022



A direct online starter with power circuit diagram is an electronic device used to safely start large electric motors. It is designed to protect the motor from damage caused by high inrush current, short circuits, and overloading. Direct online starters are commonly used in industrial and commercial applications such as pumps, compressors, fans, and conveyors.

The power circuit diagram of a direct online starter with consists of two switches; the main contactor and the auxiliary contactor. The contactors are connected in series, with one controlling the motor’s starting phase and the other controlling its stopping phase. The main contactor is responsible for the motor’s starting phase and the auxiliary contactor is responsible for the motor’s stopping phase. The contactors are connected to the power source, which can be either a single-phase or three-phase supply.

The power circuit diagram also includes a thermal overload relay, which is designed to protect the motor from damage caused by high inrush currents or excessive loads. The thermal overload relay monitors the motor’s current draw and will trip the circuit breaker if it exceeds a certain level. This ensures that the motor does not become damaged due to excessive current draw.

Finally, the power circuit diagram of a direct online starter with includes a control circuit, which is responsible for connecting the contactors, the thermal overload relay, and other components of the starter. This control circuit ensures that the starter functions properly and safely. It also allows the user to adjust the starting and stopping phases of the motor in order to optimize the performance of the motor.

Overall, direct online starters with power circuit diagrams are an essential component of any industrial or commercial motor system. They provide reliable protection of the motor against high inrush currents, short circuits, and overloading. Additionally, the control circuit allows the user to adjust the starting and stopping phases of the motor for optimal performance. With this information, you should now have a better understanding of how direct online starters work and the importance of having a power circuit diagram.


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