Eaton / Cutler-HammerND3800T35W
Eaton / Cutler-Hammer ND312T36W Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
ND312T36W
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
ND312T36W
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Eaton / Cutler-Hammer ND312T36W - 1200A 3 Pole Molded Case Circuit Breaker
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Description
Belonging to Eaton's Series C N-Frame family, the ND312T36W provides high-capacity circuit protection for industrial applications. It delivers reliable power distribution and advanced microprocessor-based sensing. This 3-pole, 1200A breaker installs into compatible Eaton panelboards, switchboards, and motor control centers. It requires a separate rating plug for operation. Equipped with a Digitrip 310 trip unit, it features adjustable LSIG protection and carries a 50 kAIC rating at 480VAC.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | ND |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | ND |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSIG |
| Trip Function | Long-Time, Short-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Adjustable |
| Trip Unit Model | Digitrip 310 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Lugs, Rating Plugs |
|---|---|
| Accessories | Without Terminals |
| Standards | CSA C22.2 No. 5.1, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | 80% Rated, HACR Rated, True RMS Sensing, Rating Plug Required |
Product FAQs
7 answersDoes the ND312T36W require a separate rating plug to function?
Yes, a rating plug is required for operation. You must install a compatible Series C N-Frame rating plug, such as the 12NES1200T, to establish the continuous current rating for the Digitrip 310 trip unit.
What adjustments does the LSIG trip function provide?
The onboard Digitrip 310 electronic trip unit offers fully adjustable Long-Time pickup, Short-Time pickup, Instantaneous pickup, and Ground-Fault pickup with adjustable delay settings for precise power system coordination.
Can I use this electronic trip breaker in a DC electrical system?
No. Eaton Series C breakers equipped with Digitrip 310 electronic trip units are designed and listed for AC applications only.
Are there built-in testing capabilities on this trip unit?
Yes, the Digitrip 310 unit features integrated test points. This allows personnel to perform functional field testing of the trip mechanisms when connected to a compatible Eaton secondary injection test kit.
Can this replace legacy Cutler-Hammer or Westinghouse N-Frame breakers?
Yes. Eaton acquired both the Cutler-Hammer and Westinghouse distribution equipment lines. Because they share the Series C N-Frame footprint, this Eaton unit serves as a direct drop-in replacement for identical older catalog numbers.
Is the trip unit on this N-Frame breaker field replaceable?
No. The N-Frame Series C circuit breakers feature trip units built in as an integral part of the breaker assembly, and they are not field replaceable.
Where must shunt trip or undervoltage accessories be mounted on this breaker?
If required for your application, shunt trips and undervoltage release accessories must be mounted in the left pole of the breaker assembly.
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