Square D HJL36100U44XAABC 100A 3-Pole 600 V Circuit Breaker Potential Transformer

Introducing the Square D HJL36100U44XAABC 100A 3-Pole 600 V Circuit Breaker Potential Transformer — a trusted protection device crafted for demanding three-phase power systems. With a 100 A current rating, 3 poles, and a 600 V maximum rating, this breaker is built to safeguard industrial and commercial electrical networks while facilitating reliable, coordinated trip performance across all phases.

• Current rating: 100 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HJL36100U44XAABC
• Brand: Square D
• Potential Transformer compatibility: designed to support configurations used in metering and protection schemes that rely on voltage sensing

Why this matters in real-world scenarios: a three-pole design ensures synchronized protection across all phases, reducing the risk of phase imbalances and equipment damage during faults. The 100 A rating is well-suited for protecting feeders and larger branch circuits, while the 600 V capability makes it a practical choice for many industrial and commercial installations that operate at higher voltages.

Ideal use cases

• Industrial feeders protecting three-phase distribution lines in manufacturing facilities, processing plants, and warehouses.
• Panel and enclosure upgrades where Square D compatibility and a specific part number streamline procurement and maintenance.
• Protection with monitoring in systems that utilize potential transformers for relays or metering, enabling accurate voltage sensing alongside overcurrent protection.

Who should consider this breaker: electrical engineers, facility managers, and panel builders who work with 600 V three-phase power and require a proven, field-tested Square D component with a clear part number for reliable replacement and ongoing serviceability.

Practical guidance for deployment and care: verify that the 100 A rating aligns with your load calculations and conductor sizing, confirm panel compatibility with the HJL36100U44XAABC, and maintain clear labeling to simplify future maintenance. When integrating into a protection scheme, plan for coordination with adjacent protective devices and ensure voltage-sensing arrangements via the associated potential transformer configuration are correctly implemented.