Industrial QP2-B125-B 125A 2-Pole 240 V Circuit Breaker Potential Transformer

Overview

The Industrial QP2-B125-B 125A 2-Pole 240 V Circuit Breaker is a rugged, dependable protection device designed for demanding industrial electrical systems. With a 125 A current rating and two-pole construction, it delivers reliable overcurrent protection for 240 V circuits, helping safeguard motors, feeders, and critical equipment from overloads and short circuits.

Key specifications

• Current rating: 125 A
• Poles: 2
• Voltage rating: 240 V
• Part number: QP2-B125-B
• Type: Industrial circuit breaker (QP2 series)

Why this model stands out

Designed for durability in industrial environments, the QP2-B125-B provides dependable protection with a two-pole design that simultaneously disconnects both live conductors. This ensures safer isolation during maintenance and reduces arc exposure. Its compact footprint fits neatly into standard control panels, switchboards, and motor control centers, making installation and future reconfiguration straightforward.

Ideal use cases

• Protect 125 A feeders supplying heavy machinery, conveyors, pumps, and MCCs in manufacturing and processing facilities.
• Main or branch circuit protection in 240 V distribution panels within industrial plants.
• Systems that integrate protection relays or metering which use potential transformer inputs for monitoring and signaling.

Practical benefits

• Clear, decisive protection for 240 V circuits, helping prevent equipment damage and downtime.
• Two-pole isolation improves safety during servicing and maintenance.
• Compatibility with existing QP-series infrastructure, simplifying replacements and upgrades.
• Streamlined panel layout and wiring with a compact 2-pole, 125 A design.

Installation and tips

Ensure the breaker is mounted in a compatible enclosure and secured according to manufacturer torque specifications. Confirm that the protected load does not exceed 125 A and that the system voltage is 240 V. In protection schemes that use potential transformers for monitoring, align connections to feed appropriate relay or metering inputs to maximize visibility and reliability of the protection strategy.