Eaton / Westinghouse KS360250 Molded Case Circuit Breaker
- 250A
- 3 Pole
- Panel Mount
Quantity
Eaton / Westinghouse KS360250 - 250A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Operating within the Series C family, this 250A molded case circuit breaker delivers consistent long-time and instantaneous protection for industrial facilities. Maintenance teams rely on this unit to service older Westinghouse CDP switchboards and Eaton Pow-R-Line 4 setups. It acts as a seamless replacement for the KD3250, eliminating the need for retrofit kits. The breaker includes factory lugs and carries a HACR rating for specialized HVAC and motor control loads.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Series | KS |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Pow-R-Line 4 Panelboards, Westinghouse CDP Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | #3 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | #3 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 | Line and Load Lugs Included |
| Standards | UL 489, NEMA AB-1, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
8 answersWhat panelboards are compatible with the KS360250 circuit breaker?
This breaker is designed for use in Eaton Pow-R-Line 4 panelboards, Westinghouse CDP panelboards, as well as compatible switchboards and motor control centers.
Is the Thomas & Betts KS360250 the same as the Eaton or Westinghouse version?
Yes, Thomas & Betts rebranded these Series C K-frame breakers. The KS360250 is physically and electrically identical whether it carries the Thomas & Betts, Westinghouse, Cutler-Hammer, or Eaton label.
What wire sizes and materials are accepted by the lugs on this 250A breaker?
The factory lugs accept wire sizes from #3 AWG up to 350 kcmil. They are dual-rated for both aluminum and copper conductors.
Can the KS360250 be used in direct current (DC) applications?
Yes, this breaker is rated for up to 250VDC with a 10kA interrupting capacity, making it suitable for DC distribution systems as well as standard AC networks.
How does this breaker mount into the panelboard?
The KS360250 features a bolt-on connection type. It must be securely bolted directly to the busbar of the panelboard or switchboard, providing a secure mechanical and electrical connection.
What frame size is the KS360250 built on?
This breaker is built on the Eaton Series C K-frame platform. It shares physical dimensions and accessory compatibility with other K-frame breakers in the 70A to 400A range.
Are the trip settings adjustable on the KS360250?
This thermal magnetic breaker features a fixed thermal element for long-time overload protection and an adjustable magnetic element, allowing installers to set the instantaneous short-circuit response based on system requirements.
What safety functions are provided by the LI trip unit?
The LI designation means it provides Long-Time (L) protection against sustained overloads and Instantaneous (I) protection to quickly clear severe short circuits before equipment damage occurs.
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