Siemens QR22B150L 150A 2-Pole 240 V Circuit Breaker Potential Transformer

Siemens QR22B150L is a rugged 150A, 2-pole, 240 V circuit breaker designed to protect vital electrical circuits in panels and load centers. With the part number QR22B150L, this device is built to endure demanding industrial and commercial environments while delivering precise fault protection.

Precise protection where it matters

As part of the Siemens QR family, the QR22B150L integrates seamlessly with QR-series panels and buses. The thermal-magnetic trip mechanism provides well-defined response across a wide temperature range, ensuring faults are isolated quickly and safely, reducing downstream damage and downtime.

Key specifications

• Current rating: 150 A
• Poles: 2
• Voltage rating: 240 V
• Part number: QR22B150L
• Type: 2-pole circuit breaker
• Compatibility: Siemens QR-series panels and load centers

Where and how you’ll use it

Use the QR22B150L to protect large feeder circuits, main distribution sections, or critical branch circuits in commercial or light-industrial panels. Its 150 A rating makes it ideal for protecting high-current loads such as large motors, HVAC equipment, or processing circuits, provided conductor sizes and panel ratings align with the specification.

In systems that include potential transformers or metering instrumentation, this breaker helps ensure safety and reliability within the protection scheme, supporting accurate fault isolation while maintaining overall system protection and monitoring.

Why this Siemens breaker stands out

• Reliability you can count on: Built for consistent performance across varying ambient conditions and frequent switching.
• Clear, repeatable trip curves: Predictable protective response minimizes collateral damage.
• Easy maintenance and replacement: Standardized QR-series footprint simplifies upgrades or swaps in compatible panels.

Installation and selection tips

• Verify panel compatibility with QR-series breakers to ensure proper fit and electrical clearance.
• Match conductor size and application needs to the 150 A rating, following the panel’s protection coordination guidelines.
• Consider coordination with metering or sensing equipment; the QR22B150L is suitable for protection schemes in systems that include potential transformers.

With the Siemens QR22B150L, you gain a dependable, high-current protection solution designed for 240 V systems in demanding environments. Ready to safeguard your critical circuits, this 150A, 2-pole breaker offers clarity, reliability, and seamless integration with your Siemens QR-series infrastructure.