Square D PowerPact PJ 1200 3P 1200A Micrologic 5.0 Circuit Breaker

Square D PowerPact PJ 1200 Circuit Breaker – 3 Pole 1200A Micrologic 5.0

The Square D PowerPact PJ 1200 is a high-capacity molded case circuit breaker engineered for heavy electrical distribution networks, marine switchboards, and critical infrastructure. Featuring the advanced Micrologic 5.0 electronic trip system, this 3-pole breaker provides precise Long-time, Short-time, and Instantaneous (LSI) overcurrent protection. Built to withstand demanding electrical loads, it guarantees reliable fault isolation, high short-circuit interrupting ratings, and exceptional operational durability.

Technical Specifications

Key Features

1. 1200 Amp Continuous Rating: Engineered to handle massive electrical loads in industrial and marine main distribution switchboards.
2. Micrologic 5.0 Electronic Trip Unit: Offers adjustable LSI protection parameters for advanced selective coordination and system selectivity.
3. High Interrupting Capacity: Delivers robust fault clearing up to 65kA AIR at 480VAC.
4. 3-Pole Configuration: Robust switching architecture optimized for heavy-duty three-phase AC power systems.
5. Modular Expandability: Fully compatible with factory-installed shunt trips, auxiliary contacts, and communication modules.

Compatibility & Part Number Cross-References

• Compatible Equipment Models: Square D PowerPact P-Frame enclosures, I-Line panelboards, Masterpact switchgear integration units, motor control centers (MCC), and marine dead-front switchboards.
• Part Number Cross-References: Square D PJL36120U31A, Schneider Electric PJP36120U31A, Square D P-Frame 1200A MCCB, Merlin Gerin equivalents.

Applications

• Marine main propulsion and auxiliary generator switchboards
• Heavy industrial manufacturing plants and substations
• Data center primary power distribution units (PDUs) and UPS systems
• Commercial building main incoming electrical service switchgear

Frequently Asked Questions

What type of trip unit does the Square D PowerPact PJ 1200 use?

The PJ 1200 uses the Micrologic 5.0 electronic trip unit, which provides adjustable Long-time, Short-time, and Instantaneous (LSI) protection functions for precise fault discrimination.

Is this circuit breaker suitable for marine switchboard installations?

Yes. The PowerPact PJ series holds major marine certifications including ABS, DNV-GL, and BV compliance, making it fully rated for shipboard power distribution and engine room switchboards.

What is the short-circuit interrupting rating at 480V?

The breaker provides an interrupting rating (AIR) of 65 kAIC at 480VAC, ensuring robust protection against high fault-current conditions.