Eaton / Westinghouse KB2250 Molded Case Circuit Breaker
- 250A
- 2 Pole
- Unit Mount
Quantity
Eaton / Westinghouse KB2250 - 250A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Part of the proven Series C lineup, the KB2250 is a 250A, two-pole molded case circuit breaker designed for industrial environments. It delivers consistent thermal-magnetic protection for critical circuits. Engineered for unit mount applications, this K-Frame breaker fits perfectly into older Westinghouse motor control centers. It provides a seamless replacement option for facilities avoiding the KD2250 upgrade. The device offers adjustable magnetic settings and a 22 kAIC rating at 480VAC.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Series | KB |
| Amperage | 250A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 25kA @ 240VAC, 22kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | KB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse Panelboards, Switchboards, Motor Control Centers, Eaton Series C Panelboards |
| Wire Gauge | 4 AWG - 350 kcmil (Cu/Al) |
| Max Wire | 350 kcmil |
| Min Wire | 4 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 Included |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489, W-C-375b |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip |
Product FAQs
8 answersWhat panelboards and enclosures are compatible with the KB2250?
The KB2250 is designed for installation in Eaton Series C and legacy Westinghouse panelboards, switchboards, and motor control centers that accept K-frame circuit breakers.
What lug kit is standard for the KB2250 circuit breaker?
The standard lug kit is the TA250KB, which includes aluminum/copper pressure terminals that accept 4 AWG to 350 kcmil wire.
What is the required tightening torque for the TA250KB lugs on this breaker?
When using the standard TA250KB aluminum/copper lugs, the terminals should be torqued to 275 lb-in (31.1 N-m).
How is the magnetic trip adjusted on the KB2250?
The KB2250 features a fixed thermal and adjustable magnetic trip unit. The magnetic dial can typically be set between 5 and 10 times the 250A continuous rating (1250A to 2500A) to prevent nuisance tripping from motor or transformer inrush currents.
What does the LI trip function code indicate on the KB2250?
The LI designation means the thermal-magnetic trip unit provides Long-Time (L) protection for overloads and Instantaneous (I) protection for short circuits.
Is the KB2250 rated for direct current (DC) applications?
Yes, this breaker is rated for use in DC systems up to 250VDC, where it provides a 10kA interrupting capacity.
Are Eaton and Westinghouse KB2250 breakers interchangeable?
Yes. Eaton acquired the Westinghouse distribution equipment division, so a KB2250 branded by Eaton, Cutler-Hammer, or Westinghouse is the exact same Series C K-frame circuit breaker.
What is the high-interrupting equivalent to the KB2250?
If your application requires a higher interrupting capacity than the standard 22kA at 480V, the HKB2250 is the high-interrupting Series C equivalent.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 3 reviews.
- DHDavid H.ReviewingEaton / Cutler-Hammer KB3100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/21/23very easy to order and
very easy to order and received order promptly
- KLKelsee L.ReviewingEaton / Cutler-Hammer KB3250 - 250A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/29/21Excellent
Excellent
- BSBill S.ReviewingEaton / Cutler-Hammer KB3200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/26/19electrical contractor
no hassle, good product that has been recertified. very satisfied with the result!