What type of contacts are found on a current relay?

In refrigeration systems, a current relay is designed to assist in the starting and operation of single-phase motors. The contacts on a current relay are specifically set up to work as normally open.

When the motor is off and the current flowing does not reach a certain threshold, the contacts remain open, preventing the motor from starting. Once the motor begins to run and the current reaches a predetermined level, the relay activates, closing the contacts and allowing the power to the motor. This action effectively helps to disconnect the starting circuit once the motor has achieved a certain operational speed.

Understanding the function of normally open contacts is crucial, as it is their design that allows for the relay to engage and disengage power to the motor based on the current detected, ensuring proper motor protection and efficiency in the refrigeration system.