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Eaton / Westinghouse HLA3175 Molded Case Circuit Breaker
- 175A
- 3 Pole
- Unit Mount
Eaton / Westinghouse
HLA3175
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
HLA3175
Quantity
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Eaton / Westinghouse HLA3175 - 175A 3 Pole Molded Case Circuit Breaker
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Description
A drop-in replacement for older Westinghouse and Cutler-Hammer distribution systems, the HLA3175 restores power without requiring panel modifications. It mounts into Pow-R-Line C panelboards and switchboards, serving as an exact match for aging infrastructure. Rated 75 kAIC at 240VAC, this 175A L-Frame molded case circuit breaker utilizes reliable thermal-magnetic protection with fixed thermal and adjustable magnetic settings. It is replaced by the modern HLD3175 series.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | HLA3175-R |
| Series | HLA |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 75kA @ 240VAC, 35kA @ 480VAC, 30kA @ 600VAC, 20kA @ 250VDC |
| Frame Type | LA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse Panelboards, Eaton Pow-R-Line C Panelboards, Switchboards |
| Wire Gauge | 6 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 6 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, Lug Kits |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, Interchangeable Trip |
Product FAQs
6 answersWhich panelboards are compatible with the HLA3175 circuit breaker?
This bolt-on breaker is designed for use in legacy Westinghouse panelboards and switchboards, as well as Eaton Pow-R-Line C panelboards that are configured to accept L-frame breakers.
What is the difference between the standard LA3175 and the HLA3175?
The HLA3175 is the high-interrupting version of the standard LA3175. It features a higher interrupting capacity, rated at 35kAIC at 480VAC, making it suitable for commercial and industrial systems with higher available fault currents.
Are the trip settings adjustable on this breaker?
The HLA3175 features a thermal-magnetic trip unit with a fixed thermal element for long-time protection and an adjustable magnetic element for instantaneous short-circuit protection. This allows electricians to fine-tune the instantaneous trip point based on the specific load characteristics.
What wire sizes are accepted by the standard lugs on the HLA3175?
The factory lugs accept both aluminum and copper conductors ranging from 6 AWG to 350 kcmil. Always verify the specific torque requirements printed on the breaker faceplate before terminating the conductors.
Can the HLA3175 be used in DC electrical systems?
Yes, this breaker is rated for DC applications up to 250VDC with an interrupting capacity of 20kAIC. It is suitable for specific industrial DC control panels and battery systems.
Is the Westinghouse HLA3175 still actively manufactured?
The HLA3175 is a legacy Mark 75 series breaker originally manufactured by Westinghouse and later supported by Eaton Cutler-Hammer. While the original series is a legacy product, it is used as a direct replacement in existing LA-frame enclosures to avoid costly panel upgrades.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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1 review
- SGScott G.ReviewingSquare D HLA36050 - 50A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/1/21Product was shipped quickly and
Product was shipped quickly and fit perfectly.