WESTINGHOUSE E-Series MCCB (Molded Case Circuit Breaker)

In the field of commercial architecture: power distribution systems for shopping centers, office buildings, and hotels, suitable for lighting, air conditioning, elevators, and other equipment. We recommend the EJ frame 100-250A series (ESJ sub series, balancing reliability and compactness).

In the field of civil architecture, the EJ framework 100-250A series (EIJ sub series, cost-effective, and easy to operate) is recommended for the protection of distribution boxes in residential communities and apartment buildings, as well as for household electricity and public lighting.

Special scenario: For equipment that requires manual control of on/off (such as testing equipment, temporary power distribution), non automatic models (EIJY, ESKY series) are recommended; Precision equipment and automation systems, recommended electronic release models (ESK-E, EHK-E series).

（2） Key points of selection

Current matching: Select the rated current based on the maximum operating current of the circuit, with a 20% margin reserved (such as selecting a 250A rated current model for a maximum operating current of 200A).

Breaking capacity matching: Select breaking capacity based on the short-circuit current level of the distribution system. For industrial scenarios with high short-circuit currents, priority should be given to models with breaking capacity of 36kA or higher.

Selection of release type: Fixed/adjustable thermal magnetic release is selected for general scenarios, and electronic release is selected for precision equipment.

Pole selection: Choose 3 poles for three-phase power distribution and 4 poles for mixed distribution with neutral wire.

Attachment configuration: Remote control is required to select shunt release, voltage sensitive equipment to select undervoltage release, and automation monitoring to select auxiliary contacts and alarm contacts.