Industrial QNPL2040 40A 2-Pole 240 V Circuit Breaker Potential Transformer

The Industrial QNPL2040 is a dedicated two‑pole circuit breaker engineered for demanding industrial environments. With a 40 A current rating and a 240 V operating voltage, this part (PN QNPL2040) provides reliable overcurrent protection for 240 V circuits while integrating smoothly with protection relays and metering systems that rely on potential transformers.

Key specifications

• Part number: QNPL2040
• Current rating: 40 A
• Poles: 2
• Voltage rating: 240 V

What makes this model unique

• Two-pole design for comprehensive protection: Disengages both live conductors simultaneously, reducing the risk of arc flash and ensuring safer interlock with 240 V circuitry.
• Industrial-grade reliability: Built to withstand the rigors of heavy‑duty panels and continuous operation in demanding environments.
• Targeted current protection: Precisely rated at 40 A to safeguard feeders and branch circuits without nuisance tripping in normal load conditions.
• Seamless compatibility with protection and metering: Optimized for use with systems that utilize potential transformers for relay signaling and measurement, enabling accurate fault sensing and data collection.

Ideal use cases

• Feeder protection in industrial electrical panels that supply 240 V equipment and machinery.
• Motor control circuits where two-pole disconnection minimizes residual voltage and simplifies lockout/tagout procedures.
• Protection for critical loads in manufacturing lines, packaging equipment, and processing systems operating on 240 V supplies.
• Systems integrating protection relays or metering equipment that rely on potential transformers for monitoring and fault indication.

Why it matters for your operation

Choosing the QNPL2040 means selecting a circuit breaker designed to interrupt fault current effectively while preserving system stability. The 2-pole configuration ensures that both conductors are simultaneously isolated during a fault, which enhances safety, reduces equipment stress, and supports quick restoration after an interruption. Its 40 A rating aligns with common industrial loads, enabling reliable protection without excessive nuisance tripping in typical 240 V applications.

Installation and best practices

For optimal performance, ensure compatibility with your panel design and verify that wiring and terminations conform to applicable electrical codes. When used with protective relays and metering circuits, the potential transformer integration should be configured to provide timely fault signals without compromising measurement accuracy. Regular inspection of connections and periodic testing of trip functionality will help maintain reliable protection over time.