Siemens HQR23B225L 225A 3-Pole 240 V Circuit Breaker Potential Transformer

Introducing the Siemens HQR23B225L 225A 3-Pole 240 V Circuit Breaker Potential Transformer — a purpose-built solution for reliable protection and precise electrical monitoring in demanding power systems. This device combines solid overcurrent protection with a built-in potential transformer, helping you monitor voltage and feed protective relays without adding separate components.

Why it matters

• High-current capability: 225 A rating supports substantial feeders and main circuits in industrial and commercial installations.
• Three-pole design: Ensures all three phases are protected evenly, reducing the risk of unbalanced faults.
• 240 V compatibility: Engineered for standard 240 V AC systems, aligning with typical panel and switchgear configurations.
• Integrated metering support: The potential transformer path enables voltage measurement suitable for metering, protection relays, and monitoring equipment, simplifying wiring and improving response times.
• Part Number clarity: HQR23B225L identification ensures straightforward ordering, replacement, and compatibility within Siemens ecosystems.

Ideal use scenarios

• Industrial control panels where robust protection and voltage monitoring are needed in a single assembly.
• Commercial power distribution with heavy feeders and critical circuits requiring reliable trip protection and precise voltage data.
• Systems integrating protection relays that rely on a supply-fed potential transformer for accurate sensing.

Performance in practice

With the Siemens HQR23B225L, installers gain a compact, dependable protection device that reduces wiring complexity and panel space, while delivering consistent phase protection across the system. It’s well-suited for retrofits in existing Siemens panels and new builds where matching Siemens protection hardware simplifies maintenance and future upgrades.

Practical tips

• Verify system voltage and load conditions align with the 240 V, 225 A ratings before installation.
• Coordinate with your protection relay or metering setup to take full advantage of the potential transformer integration.
• Follow standard electrical safety procedures during installation and commissioning.