Supco APR5 Wire to Wire Adjustable Potential Relay for 30 A Load, 110 - 270 VAC Single Phase

This adjustable potential relay from Supco, the APR5 model, is designed for wire-to-wire replacement in 1-phase, capacitor-type motors used in air conditioning and refrigeration applications. The relay features adjustable settings, allowing it to replace a wide range of potential relays with pickup voltages ranging from 110 to 270 VAC.

One of the key features of this relay is its safety time-out function, which will cause the contacts to open if the motor fails to start within 1 to 1.5 seconds. This helps to prevent potential issues and ensures the safe operation of the equipment.

The Supco APR5 relay offers universal, non-positional mounting, along with adapters for both screw and push-on terminals. This versatility makes it a suitable replacement for both 3-terminal and 5-terminal potential relays, ensuring compatibility with a variety of single-phase motors or air conditioning and refrigeration compressors up to 5 horsepower.

Relay switches, also known as electrical relays or electrical relay switches, are devices that use a small amount of power to control a larger source of power connected to various electrical devices, such as car motors, computers, and lighting installations. These switches typically have a control circuit with an electromagnetic coil and a load circuit with contacts and a lever.

When current flows into the relay switch, it moves through the coil, creating a magnetic field that causes the lever in the load circuit to move between contacts, either turning the connected device on or off. In a normally open (NO) relay switch, the load circuit is closed when power is supplied to the relay, turning the connected device on. Conversely, in a normally closed (NC) relay switch, the load circuit is opened when power is supplied, turning the connected device off.

Some relay switches utilize non-moving parts, such as transistors or semiconductors, in the control circuit to operate the switching mechanism. These relays can be controlled by an external switch, like a light switch, or they can be connected to an automatically switched power source, such as a car ignition.

One relay can operate multiple switches, and multiple relays can be operated by a single switch, with each relay functioning independently within the system. This versatility makes relay switches a crucial component in a wide range of electrical and electronic applications.

Supco, a company founded in 1945 and headquartered in Allenwood, NJ, specializes in manufacturing test instruments and replacement parts for heating, ventilation, air conditioning, and refrigeration (HVAC/R) systems.

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