Eaton / Westinghouse LC3275 Molded Case Circuit Breaker
- 275A
- 3 Pole
- Unit Mount
Quantity
Eaton / Westinghouse LC3275 - 275A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for legacy power distribution systems, the LC3275 is a 275A, three-pole MCCB. This unit-mount breaker provides reliable overcurrent protection for facilities utilizing older Westinghouse or Cutler-Hammer equipment. It installs into compatible switchboards without retrofitting kits. As an exact replacement for discontinued LC-frame models, it can be substituted by the newer LD3275.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | LC3275-R |
| Series | LC |
| Amperage | 275A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse/Eaton Switchboards, Panelboards, Motor Control Centers |
| Wire Gauge | 250-500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 250 kcmil |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LS |
| Trip Function | Long-Time, Short-Time |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release |
|---|---|
| Accessories | Lugs Not Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Seltronic, Solid State, Reverse Feed |
Product FAQs
5 answersWhat types of enclosures are compatible with the LC3275 circuit breaker?
This legacy LC frame breaker is designed for installation in compatible Westinghouse and Eaton switchboards, panelboards, and motor control centers.
Does this breaker include both line and load side lugs?
No. This specific configuration is supplied with load side lugs only. Line side connections typically require separate bus hardware or terminals depending on your specific switchboard or panelboard setup.
What does the LS designation mean on this trip unit?
The LS code indicates that the solid state electronic trip unit provides long-time and short-time trip functions. This allows for better selective coordination with downstream devices compared to standard thermal-magnetic breakers.
Is the Westinghouse LC3275 still in active production?
No, the Westinghouse LC frame is a legacy molded case circuit breaker that is no longer in active production. Eaton has superseded this frame with newer series, such as the Series C and Power Defense lines, though exact retrofits require verifying your enclosure dimensions and mounting hardware.
How is the LC3275 mounted within distribution equipment?
This is a unit mount, bolt-on circuit breaker. It must be bolted directly to the bus or mounting pan of the enclosure, which provides a secure mechanical and electrical connection for high-amperage applications.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- DLDeanna L.Verified BuyerReviewingSquare D LC36600 - 600A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/11/26Square D LC36600 - 600A 3 Pole Molded Case Circuit Breaker
Worked great! Our customer was very pleased with the results.