HMCPJ250K5 CUTLER-HAMMER

Key Technical Specifications

Product Model: HMCPJ250K5
Manufacturer: CUTLER-HAMMER
Rated Voltage: 600V AC
Rated Current: 250A
Frame Type: Molded Case Circuit Breaker (MCCB)
Interrupting Capacity: 25kA at 480V AC
Poles: 3
Trip Unit Type: Thermal Magnetic
Mounting Type: Chassis/Panel Mount
Ambient Temperature Range: -10°C to 60°C
Enclosure Rating: IP20 (Indoor use)
Trip Setting Range: 160-250A
Shunt Trip: Yes (optional)
Auxiliary Contacts: 1NO/1NC (optional)
Weight: Approx. 8.5 kg

Technical Architecture & Functional Positioning

System Role:
The HMCPJ250K5 is designed as a motor circuit protector, providing protection for motors, wiring, and electrical circuits against overload, short-circuit, and ground faults. The circuit breaker is an essential part of motor control centers (MCCs), distribution panels, and electrical panels, offering protection while maintaining the reliability of the overall system.

The thermal magnetic trip unit in the HMCPJ250K5 combines two key protection mechanisms:

Thermal protection to guard against sustained overloads.
Magnetic protection to handle short-circuit faults by providing fast tripping to clear faults before they can cause damage.

Core Technology:
The thermal magnetic trip unit allows for adjustable overcurrent protection, ensuring the breaker responds appropriately to long-duration overloads as well as instantaneous short-circuit faults. The interrupting capacity of 25kA at 480V AC ensures that the breaker can safely interrupt fault currents without causing damage to the electrical system. The adjustable trip settings between 160-250A allow for flexibility based on the motor or system load requirements.

Engineering Value:
The HMCPJ250K5 provides reliable motor protection, preventing long-term damage from conditions such as overload, and offering instantaneous protection during short-circuit or ground fault conditions. It is designed for easy integration within motor control systems and industrial power distribution systems, ensuring that motors and connected components are protected from electrical faults, thereby improving system uptime and reducing downtime due to failure.