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Eaton / Westinghouse LB3250 Molded Case Circuit Breaker
- 250A
- 3 Pole
- Bolt-On
Eaton / Westinghouse
LB3250
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
LB3250
Quantity
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Eaton / Westinghouse LB3250 - 250A 3 Pole Molded Case Circuit Breaker
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Description
Serving as an exact drop-in replacement for aging commercial systems, this 250A L-frame breaker fits seamlessly into classic Westinghouse panelboards and motor control centers. It eliminates the need for retrofit adapters required by newer LGE3250FAG models, saving valuable installation time. Featuring interchangeable trip units and adjustable magnetic settings, it delivers robust 42kAIC interrupting capacity at 240V for demanding industrial applications.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | LB3250-R |
| Series | LB |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 20kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | #6 AWG - 350 kcmil |
| 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 |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit |
Product FAQs
7 answersWhat equipment is the LB3250 circuit breaker designed to fit?
The LB3250 is a legacy L-Frame breaker designed specifically for older Westinghouse and Eaton Cutler-Hammer panelboards, switchboards, and motor control centers.
How does the trip unit on the LB3250 function?
It features a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element. The adjustable magnetic setting allows electricians to fine-tune the instantaneous short-circuit pickup to coordinate with other devices in the distribution system.
What wire sizes are supported by the LB3250 terminals?
The included lugs accommodate wire gauges ranging from #6 AWG up to 350 kcmil. Ensure proper torque specifications are followed during installation as outlined by the manufacturer.
Why is the LB3250 associated with both Eaton and Westinghouse?
Eaton acquired the Westinghouse electrical distribution division in 1994. As a result, legacy Westinghouse breakers like the LB series are now managed under the Eaton Cutler-Hammer brand for use in existing infrastructure.
Is the LB3250 suitable for direct current applications?
Yes, while primarily used in AC systems up to 600VAC, this breaker is also rated for DC applications up to 250VDC, providing a 20kA interrupting capacity for those circuits.
Does the LB3250 require external current transformers for its trip functions?
No, the LB3250 uses an integral thermal-magnetic trip unit. It does not require external CTs or external control power to perform its long-time and instantaneous protective functions.
How is the LB3250 installed into the panelboard?
This is a bolt-on circuit breaker. It bolts directly to the busbars of compatible Westinghouse or Eaton enclosures, providing a secure mechanical and electrical connection suitable for industrial environments.
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Reviews
Review summary
Customers rate this product 4.5 out of 5 based on 2 reviews.
Total 5 star reviews: 1 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
2 reviews
- KMKaren M.ReviewingEaton / Westinghouse LB3200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/29/22Great Resource
The website is easy to use and the shipping is very quick will continue to use SuperBreakers
- RRRashida R.ReviewingCutler-Hammer / Westinghouse LB3400F FrameI recommend this productRated 4 out of 5 stars6/18/17Purchase of CH LB3400F
Circuit breaker was shipped in very timely manner. Tracking # was correct.