Square D HJA36070AA 36070A 3-Pole 600 V Circuit Breaker Potential Transformer

Introducing the Square D HJA36070AA 36070A 3-Pole 600 V Circuit Breaker Potential Transformer — a purpose-built protection device designed for reliable three‑phase power in industrial and commercial settings. Built to meet demanding electrical standards, this unit combines robust overcurrent protection with a potential transformer interface to support accurate sensing for protection relays and metering.

Key features designed to streamline installation and improve system reliability:

• Part Number: HJA36070AA
• Current rating: 36070 A
• Poles: 3
• Voltage rating: 600 V
• Potential Transformer integration: geared for precise sensing and relay coordination in protected networks

Why this model stands out

• Three-pole design for balanced protection in three-phase systems, reducing the risk of unbalanced faults and enabling coordinated trip schemes.
• High-voltage capability up to 600 V makes it suitable for a wide range of industrial feeders, MCCs, and switchgear assemblies.
• Integrated potential transformer interface simplifies metering and protection relay connections, helping you consolidate components and reduce wiring complexity.
• Durable Square D engineering built to withstand demanding environments, long service life, and predictable performance under fault conditions.

Ideal use scenarios

• Protection for three‑phase motors and heavy machinery in manufacturing facilities
• Main protection in switchgear cabinets and distribution panels serving data centers or commercial campuses
• Protection and metering-ready configurations where accurate voltage sensing is essential for relay coordination

How it compares to alternatives

• Offers a compact, integrated approach by combining circuit breaking function with a potential transformer interface, which can reduce wiring and panel space compared to separate breaker and PT components.
• Designed for reliability in industrial environments, delivering consistent trip performance and precise sensing without the need for aftermarket adapters.

Practical tips for installation and planning

• Verify compatibility with your panel or switchgear enclosure and ensure voltage and current ratings align with your system design.
• Plan relay coordination early; the potential transformer interface simplifies integration with protection relays and metering equipment.
• Consult the installation manual for torque specs, busbar alignment, and mounting clearances to maintain optimal performance.

Whether you’re upgrading an aging protection scheme or designing a new three‑phase installation, the Square D HJA36070AA 36070A 3-Pole 600 V Circuit Breaker Potential Transformer delivers precise protection, streamlined sensing, and the reliability you expect from Square D. Reach out to your electrical distributor or add to cart to secure this dependable protection solution for your 3‑phase systems.