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Eaton / Westinghouse LM31200 Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Bolt-On
Eaton / Westinghouse
LM31200
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
LM31200
Quantity
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Eaton / Westinghouse LM31200 - 1200A 3 Pole Molded Case Circuit Breaker
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Description
A reliable solution for aging electrical infrastructure, the Eaton LM31200 delivers 1200A of continuous power distribution and protection. This 3-pole, 600VAC breaker utilizes a thermal-magnetic trip mechanism with adjustable magnetic settings, ensuring optimal defense against short circuits. Engineered to fit legacy Westinghouse motor control centers and switchboards, it provides a straightforward replacement path. For modern cross-references, the ND31200 serves as its contemporary substitute.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | LM31200-R |
| Series | LM |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse Panelboards, Switchboards, Motor Control Centers |
| 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 is the modern replacement for the legacy Westinghouse LM31200 circuit breaker?
The Eaton ND31200 serves as the contemporary cross-reference and direct replacement for the legacy LM31200, offering an upgrade path for aging electrical infrastructure.
What equipment is the LM31200 designed to be installed in?
This breaker is engineered to fit legacy Westinghouse motor control centers, switchboards, and panelboards, providing a straightforward replacement path for older infrastructure.
What frame size does the LM31200 belong to?
The LM31200 is part of the legacy Westinghouse L-Frame group within the Series C family of molded case circuit breakers.
How does the trip unit function on the LM31200?
It utilizes a thermal-magnetic trip mechanism with a fixed thermal (Long-Time) element for overload protection and an adjustable magnetic (Instantaneous) setting, allowing electricians to fine-tune short-circuit defense.
Are lug terminals included with this breaker?
Yes, the LM31200 comes complete with load side lug terminals for immediate wire termination.
Is the LM31200 suitable for direct current (DC) systems?
Yes, in addition to standard AC ratings, this breaker is certified for DC applications up to 250VDC with a 10kA interrupting capacity.
How is the LM31200 secured within the enclosure?
It features a bolt-on mounting style, requiring it to be bolted directly to the busbars of compatible Westinghouse panelboards and switchboards for a secure electrical connection.
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