Square D HLL36125AABCSK 36125A 3-Pole 600 V Circuit Breaker Potential Transformer

Square D HLL36125AABCSK is a rugged three-pole circuit breaker with an integrated potential transformer, engineered for reliable protection and accurate voltage sensing in demanding industrial power systems. With a 600 V rating and a listed current rating of 36125 A, this unit is built to perform in environments where dependable protection matters most.

Key specifications

• Part Number: HLL36125AABCSK
• Poles: 3 (three-phase protection)
• Voltage rating: 600 V
• Current rating: 36125 A
• Integrated potential transformer for direct sensing to relays and metering
• Designed for Square D (Schneider Electric) systems and compatibility

Why this combination matters

• Integrated potential transformer delivers accurate voltage sensing directly from the breaker, simplifying protection schemes and improving relay and metering accuracy.
• Three-pole design provides balanced protection across all phases in 3‑phase, 4‑wire or 3‑phase systems, reducing the risk of unbalanced faults.
• Eliminates the need for separate PT components in many panel configurations, reducing wiring complexity and inventory management.
• Rigid construction and 600 V capability make it suitable for industrial environments, data centers, and critical facilities requiring dependable power protection.

Ideal applications

• Industrial facilities with three-phase 600 V distribution networks
• Manufacturing plants that rely on accurate protection and real-time voltage sensing for relays and meters
• Electrical panels and switchgear in data centers or critical facilities where compact, integrated protection components streamline installation

Usage and installation considerations

Install by qualified personnel in accordance with applicable electrical codes. Verify system compatibility with your Square D panel and protection relays, and follow the manufacturer’s wiring and termination guidelines. The integrated PT output supports protection relays and metering circuits, helping you achieve precise fault detection and reliable monitoring across your three-phase distribution.