E-Frame Circuit Breaker

Square D E-Frame Circuit Breakers by Schneider Electric are UL 489 listed circuit breakers designed for equipment protection in electrical distribution systems. These breakers use thermal-magnetic tripping units and are built for installation in Square D NF circuit breaker panelboards. E-frame breakers are available in 1-pole, 2-pole, and 3-pole configurations with continuous current ratings of 15, 20, 30, 40, and 50 amps, along with a range of interrupting ratings to support different application requirements.

Square D Equipment Protection Device circuit breakers are designed with fixed ground fault protection at 30 mA in accordance with UL 1053. This protection helps detect leakage current to ground before it reaches a level that could damage connected electrical equipment. Because many short-circuit events begin as ground faults, early detection can help reduce equipment damage and support more effective preventive maintenance planning. When a ground fault greater than 30 mA is detected, the breaker trips and the VISI-TRIP indicator displays a red flag for clear visual identification.

E-frame circuit breakers are commonly used in applications where equipment protection is important, including heat trace systems used to help prevent freezing in pipes, gutters, and similar installations. They are also used for well pumps and other electrical equipment that can benefit from fixed-level ground fault protection. With thermal-magnetic operation, panelboard compatibility, and integrated equipment protection features, Square D E-frame circuit breakers provide a practical solution for installations that require dependable circuit protection and ground fault monitoring.er electrical equipment.