Littelfuse Motor and Pump Protection Relays

Littelfuse Motor and Pump Protection Relays are designed to protect three-phase or single-phase motors within operating voltages. The relay operates as a fail-safe device. This means when the voltage is within the programmed limits, the relay will energize—the "NO" contact will close. When the unit loses power or senses a fault condition, the relay will de-energize and contacts will return to their original state.