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Eaton / Westinghouse HLB3150 Molded Case Circuit Breaker
- 150A
- 3 Pole
- Bolt-On
Eaton / Westinghouse
HLB3150
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
HLB3150
Quantity
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Eaton / Westinghouse HLB3150 - 150A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Description
Serving as an exact fit for vintage commercial applications, this 150-amp L-Frame breaker restores power distribution in older facilities. It integrates seamlessly into existing Westinghouse switchboards and motor control centers. Finding an authentic replacement eliminates the need for a TAD3 spacer kit, which is required when substituting with the newer KD3150 Series C model. The bolt-on design ensures a secure connection to the busbar.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Series | HLB |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 22kA @ 250VDC |
| Frame Type | LB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 1 AWG - 600 kcmil (Al/Cu) or (2) 1 AWG - 250 kcmil (Al/Cu) |
| Max Wire | 600 kcmil |
| Min Wire | 1 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, Interchangeable Trip Unit |
Product FAQs
6 answersWhat is the difference between the standard LB3150 and the HLB3150?
The HLB3150 is the high-interrupting version of the standard LB3150 breaker. As part of the Mark 75 family, it provides a higher interrupting capacity for systems with greater available fault current, while maintaining the same physical footprint and bolt-on mounting.
Which enclosures and systems are compatible with the HLB3150?
This L-frame breaker is designed for bolt-on installation in legacy Westinghouse, Cutler-Hammer, and Eaton distribution panelboards, switchboards, and motor control centers.
How does the adjustable magnetic trip function operate on this breaker?
The HLB3150 includes a fixed thermal element for overload protection and an adjustable magnetic element for short-circuit protection. The instantaneous pickup can be tuned via dials on the breaker face to coordinate with motor inrush currents or downstream devices.
What are the acceptable wire configurations for the HLB3150 lugs?
The factory lugs accommodate either a single 1 AWG to 600 kcmil conductor or dual 1 AWG to 250 kcmil conductors per phase. Both aluminum and copper wiring are supported.
Is the Westinghouse HLB3150 suitable for direct current systems?
Yes, this thermal-magnetic breaker is rated for 250VDC applications with a 22kA interrupting capacity, allowing it to be used in industrial DC distribution and control panels.
What is the current manufacturing status of the Westinghouse HLB series?
The Westinghouse HLB series is a legacy product line. While Eaton acquired the Westinghouse electrical division and maintains backward compatibility, modern replacements often utilize the Eaton Series C L-frame depending on the specific mounting hardware required.
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