Potential Start Relay Wiring Diagram

By | February 1, 2023

A potential start relay is a type of relay that is used to control the starting of an electric motor. It is typically used in applications where the motor is started by a pushbutton or other type of manual switch. The relay prevents the motor from starting until the switch is closed, which ensures that the motor is not started accidentally.

The potential start relay consists of two coils, a normally open contact, and a normally closed contact. The coils are connected in series with the motor starter and the switch. When the switch is closed, current flows through the coils and creates a magnetic field. This magnetic field pulls the plunger of the relay down, which closes the normally open contact and opens the normally closed contact.

The closed normally open contact allows current to flow to the motor, starting it. The open normally closed contact prevents the motor from starting if the switch is opened.

The potential start relay is a simple and effective way to control the starting of an electric motor. It is a reliable and cost-effective way to prevent the motor from starting accidentally.

Here is a diagram of a potential start relay wiring diagram:

220px Potential Start Relay Wiring Diagram.svg

In this diagram, the potential start relay is represented by the symbol labeled "K1". The coils of the relay are represented by the symbols labeled "M1" and "M2". The normally open contact of the relay is represented by the symbol labeled "NO". The normally closed contact of the relay is represented by the symbol labeled "NC". The motor starter is represented by the symbol labeled "M". The switch is represented by the symbol labeled "S".

The wiring of the potential start relay is as follows:

  • The coil M1 is connected to the positive terminal of the battery.
  • The coil M2 is connected to the negative terminal of the battery.
  • The normally open contact NO is connected to the motor starter.
  • The normally closed contact NC is connected to the switch.
  • The switch is connected to the positive terminal of the battery.
  • The motor is connected to the negative terminal of the battery.

When the switch is closed, current flows through the coils of the relay and creates a magnetic field. This magnetic field pulls the plunger of the relay down, which closes the normally open contact and opens the normally closed contact.

The closed normally open contact allows current to flow to the motor, starting it. The open normally closed contact prevents the motor from starting if the switch is opened.


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