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Eaton / Westinghouse HK3150 Molded Case Circuit Breaker
- 150A
- 3 Pole
- Panel Mount
Eaton / Westinghouse
HK3150
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
HK3150
Quantity
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Eaton / Westinghouse HK3150 - 150A 3 Pole Molded Case Circuit Breaker
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Description
Designed to restore older electrical infrastructure, this 150-amp Series C circuit breaker offers proven thermal-magnetic protection for commercial facilities. It mounts into existing Westinghouse switchboards and motor control centers, ensuring a precise fit for legacy applications. When upgrading, it is replaced by the HKD3150 catalog number. The three-pole K-Frame design achieves a 65kAIC rating at 480V and includes factory-installed line and load lugs for immediate termination.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | HK3150-R |
| Series | HK |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 22kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 3 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 3 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, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CE, CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, HACR Rated |
Product FAQs
7 answersWhat enclosures are compatible with the HK3150 circuit breaker?
It mounts into existing Westinghouse and Eaton Cutler-Hammer panelboards, switchboards, and motor control centers that are configured for Series C K-Frame breakers.
Can I replace an older HK3150 with an HKD3150?
Yes. The HK3150 is the legacy Westinghouse catalog number, and the HKD3150 is the active Eaton Series C replacement. Both share the same K-Frame dimensions and mounting footprint for direct interchangeability.
How is the trip unit configured on the HK3150?
This breaker features a thermal magnetic trip unit with an LI configuration. It provides fixed thermal protection for long-time overloads and an adjustable magnetic dial to fine-tune the instantaneous short-circuit response.
Are the factory lugs on the HK3150 rated for aluminum conductors?
Yes, the included line and load lugs are dual-rated for both copper and aluminum (Al/Cu) wire, accommodating conductor sizes from 3 AWG up to 350 kcmil.
What distinguishes the HK3150 from a standard KD3150 breaker?
The H in the HK prefix indicates a high interrupting capacity. While standard KD breakers have lower short-circuit ratings, the HK3150 achieves up to 65kAIC at 480VAC and 100kAIC at 240VAC.
How can I verify the mechanical trip linkage is functioning?
Use the push-to-trip button on the face of the breaker. Actuating this button manually exercises the trip mechanism, ensuring the internal contacts open properly prior to placing the unit into service.
Is the HK3150 rated for DC voltage systems?
Yes, this breaker is rated for up to 250VDC with an interrupting capacity of 22kA, making it suitable for specific direct current applications in industrial environments.
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