Eaton / Cutler-Hammer HKD3250T57WZGP Molded Case Circuit Breaker
- 250A
- 3 Pole
- Panel Mount
Quantity
Eaton / Cutler-Hammer HKD3250T57WZGP - 250A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Designed for complex electrical systems, this 250A K-Frame breaker incorporates a Digitrip Optim 550 LSIA electronic trip unit with Zone Selective Interlocking and PowerNet capabilities. It mounts into Eaton Series C panelboards and motor control centers, providing robust panel mount integration. With a 65 kAIC rating at 480VAC, the HKD3250T57WZGP ensures superior coordination, ground fault alarm monitoring, and programmable trip settings for critical commercial infrastructure.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | HKD |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC |
| Amperage Range | 100-250A |
|---|
| Frame Type | K |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSIA |
| Trip Function | Long-Time, Short-Time, Instantaneous, Alarm |
| Trip Adjustability | Adjustable |
| Trip Unit Model | Digitrip Optim 550 |
| Available Options | Lugs, Auxiliary Switch, Shunt Trip, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Zone Selective Interlocking, PowerNet Kit, Digitrip Optim 550 Trip Unit |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Zone Selective Interlocking, PowerNet Communication, Ground Fault Alarm |
Product FAQs
7 answersWhat does the "ZGP" suffix indicate on the HKD3250T57WZGP catalog number?
The "ZGP" suffix signifies that the breaker is factory-equipped with Zone Selective Interlocking (ZG) and a PowerNet communication kit (P).
What specific protection functions does the "T57" trip unit provide?
The "T57" designation indicates a Digitrip OPTIM 550 electronic trip unit configured for LSIA protection. This includes adjustable Long-time, Short-time, and Instantaneous trip functions, plus a Ground Fault Alarm.
Does the LSIA trip unit provide ground fault tripping?
No. The "A" in LSIA stands for Ground Fault Alarm. It will monitor and alert you to a ground fault condition via the PowerNet system or a local indicator, but it will not automatically trip the breaker to clear a ground fault.
Can the HKD3250T57WZGP be used in DC applications?
No. While the Series C K-Frame itself has a generic DC rating, the Digitrip OPTIM 550 electronic trip unit installed in this specific breaker is designed for 50/60 Hz AC applications only. For DC applications, a thermal-magnetic trip unit must be used.
What does the "H" in the HKD prefix signify?
The "H" indicates this is the high-interrupting version of the Series C K-Frame breaker, providing a 65kAIC rating at 480VAC compared to the 35kAIC rating of a standard KD breaker.
How does the Zone Selective Interlocking (ZSI) function operate on this breaker?
The ZSI feature allows the breaker to communicate with downstream devices. When a fault occurs, it coordinates with other breakers to ensure the device closest to the fault clears it first, minimizing system downtime and reducing arc flash energy.
What equipment is compatible with this K-Frame circuit breaker?
The HKD3250T57WZGP is designed for bolt-on installation in Eaton and Cutler-Hammer Series C panelboards, switchboards, and motor control centers.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 4 reviews.
- ASAaron S.Verified BuyerReviewingEaton / Cutler-Hammer HKD3400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/13/26Worked as advertised
Don't forget the lug kit if needed
- LHLarry H.Verified BuyerReviewingEaton / Cutler-Hammer HKD3200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/19/25It was great
New breaker
- CSCatherine S.ReviewingEaton / Cutler-Hammer HKD3400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/24/22Great
Great Service / Prompt Delivery
- FSFrank S.ReviewingEaton / Cutler-Hammer HKD3400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/23/17Breaker purchase
Purchased breaker at a great price, was in stock and shipped it out right away. Will shop at this site again in the future.