Eaton / Westinghouse HK3090 Molded Case Circuit Breaker
- 90A
- 3 Pole
- Panel Mount
Eaton / Westinghouse
HK3090
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
HK3090
Quantity
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Eaton / Westinghouse HK3090 - 90A 3 Pole Molded Case Circuit Breaker
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Description
Designed to support aging electrical infrastructure, this 90A K-Frame breaker offers dependable long-time and instantaneous trip functions. The Series C component provides high interrupting capacity for industrial environments. Engineered for panel mount applications, it fits perfectly into legacy Westinghouse switchboards and motor control centers. Featuring an adjustable magnetic trip, this 3-pole unit allows for precise coordination and can be substituted by the HKD3090.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Series | HK |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 22kA @ 250VDC |
| Frame Type | HK |
|---|---|
| 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
5 answersAre Eaton and Westinghouse HK3090 breakers the same?
Yes. Eaton acquired the Westinghouse electrical distribution business. Breakers labeled under the Eaton, Cutler-Hammer, or Westinghouse brands with the HK3090 catalog number are identical and can be used interchangeably in the same equipment.
What is the difference between the HK3090 and KD3090 breakers?
Both belong to the Series C K-frame family and share the same physical dimensions, but they differ in short-circuit performance. The HK3090 is a high-interrupting breaker rated at 65kA at 480VAC, while the standard KD3090 is rated at 35kA at 480VAC.
How does the adjustable magnetic trip function work on this breaker?
The HK3090 features a thermal-magnetic trip unit with a fixed thermal element for overload protection and an adjustable magnetic element. The adjustable dial allows you to modify the instantaneous short-circuit trip point to better coordinate with downstream protective devices.
What enclosures accept the HK3090 breaker?
This feed-thru panel mount breaker is designed for use in Eaton, Cutler-Hammer, and Westinghouse Series C panelboards, switchboards, and motor control centers that are configured for K-frame devices.
What wire sizes do the standard lugs accommodate?
The included lugs accept either copper or aluminum conductors ranging from 3 AWG to 350 kcmil. Always verify the specific torque requirements printed on the breaker faceplate or manufacturer documentation during installation.
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