Eaton BQL330 30A 3-Pole 240 V Circuit Breaker Potential Transformer

Eaton BQL330 is a 30 A, 3-pole, 240 V circuit breaker engineered for dependable protection of three‑phase electrical systems. With Part Number BQL330, this unit is built to withstand demanding industrial and commercial environments while ensuring fast, coordinated fault isolation across all three phases.

Key features that matter in real-world panels

• Three-pole design: Provides synchronized protection for all phases in a 3‑phase circuit, reducing the risk of unbalanced loads and equipment damage.
• 30 A current rating: Suited for mid‑range branch circuits and motor control applications where reliable protection is essential without nuisance tripping.
• 240 V operating voltage: Optimized for standard three‑phase electrical systems found in commercial and light industrial settings.
• Part Number clarity: Explicitly identified as BQL330 for easy ordering, stocking, and cross‑referencing with compatible Eaton protective devices.
• Potential Transformer compatibility: Designed to integrate with protection and metering schemes that leverage potential transformer interfaces for enhanced circuit monitoring and fault reporting.
• Durable, panel-ready form factor: Built to fit common electrical panels and distribution boards, minimizing installation complexity and downtime.

Who should consider the BQL330?

• Maintenance teams and electricians responsible for three‑phase motor feeds, pumps, conveyors, and HVAC equipment.
• Panel builders and facility engineers seeking a reliable, easily sourced protection device for 3‑phase distribution racks.
• Projects that require standardization across Eaton protections to simplify spare parts and service procedures.

What problem does it solve?

By delivering coordinated trip across all phases at the prescribed current, the BQL330 helps prevent cascading faults, reduces equipment wear, and shortens downtime after electrical faults. Its 240 V rating aligns with common industrial power systems, while the three-pole design ensures balanced protection for motors and other three‑phase loads.

Practical tips for installation and use

• Verify panel compatibility and ensure the breaker is suitable for your bus rating and enclosure size.
• Follow manufacturer torque specifications for terminal connections to maintain reliable electrical contact.
• When integrating with metering or protection schemes, plan for potential transformer interfaces to enable accurate fault detection and reporting.
• Schedule regular inspections of connections and surrounding wiring to prevent corrosion and ensure consistent performance.
• Keep spare BQL330 units on hand in maintenance inventories to minimize panel downtime during replacements.

Why this Eaton solution stands out

Unlike generic or single‑pole protection options, the BQL330 delivers true three‑phase protection with a clear, traceable Eaton lineage. Its 30 A rating is purpose‑matched to common mid‑line loads, and its 240 V compatibility makes it a straightforward fit for many existing installations. The potential transformer capability adds flexibility for modern protection strategies without requiring a separate, complex retrofit.