Eaton / Cutler-Hammer NGS312032E Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Unit Mount
Quantity
Eaton / Cutler-Hammer NGS312032E - 1200A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for high-capacity distribution, the Eaton NGS312032E is a 3-pole, 1200A electronic trip MCCB. It delivers reliable, 80% rated continuous current protection for demanding industrial environments. This NG-frame MCCB mounts into Eaton Series G panelboards and switchboards. It serves as a direct replacement for the older ND312032 model, ensuring a smooth upgrade path. Featuring an advanced electronic trip unit, it provides adjustable LSI protection, true RMS sensing, and 50kAIC at 480VAC.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | NGS |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 85kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 500-1200A |
|---|
| Frame Type | NG |
|---|---|
| Terminal Type | Stud/Tapped Pad |
| For Use With | Eaton Series G Panelboards, Switchboards, Motor Control Centers |
| Max Wire | 500 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Lugs, Auxiliary Switch, Shunt Trip, Undervoltage Release, Alarm Switch, Motor Operator, Handle Lock |
|---|---|
| Accessories | Mounting Hardware, Lugs Not Included |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, HACR, IEC, KEMA KEUR, UL |
| Temp Rating | -20C to 70C |
| Construction Features | HACR Rated, Current Limiting, Reverse Feed, True RMS Sensing, 80% Rated |
Product FAQs
7 answersWhich panelboards and electrical assemblies are compatible with the Eaton NGS312032E?
This 1200A Series G circuit breaker is designed for use in Eaton and Cutler-Hammer panelboards, switchboards, and motor control centers. It is also suitable for installation in Allen Bradley MCCs and Rockwell Automation enclosed control systems.
What does the LSI trip unit designation mean on this breaker?
The NGS312032E features an electronic LSI trip unit, which provides Long-Time, Short-Time, and Instantaneous protection. This microprocessor-based Digitrip unit allows precise field adjustable curve settings to optimize circuit protection and selective coordination, outperforming standard thermal-magnetic breakers.
Does the NGS312032E come with mechanical wire lugs installed?
No. This unit is supplied with imperial stud and tapped pad terminals for feed-thru connections. If you plan to terminate bare copper or aluminum wire, you will need to source and install the appropriate Series G mechanical or compression lug kits separately.
How does the Series G NG-frame circuit breaker compare to the older ND-frame?
The Eaton Series G NG-frame is built upon the proven design of the legacy Series C ND-frame. Because they share the same physical dimensions and footprint, the NG-frame is frequently used as a modern upgrade or direct replacement for older 1200A ND-frame breakers in existing switchboards and control centers.
Is the NGS312032E suitable for reverse feed applications?
Yes. Like all Eaton Series G NG-frame molded case circuit breakers, the NGS312032E is fully suitable for reverse feed use. This provides panel builders and electricians with additional flexibility when routing power lines within tight electrical assemblies.
Can I use this circuit breaker in 50 Hz and 60 Hz electrical systems?
Yes. The microprocessor-based electronic trip unit inside this circuit breaker provides true RMS current sensing and is fully compatible with both 50 Hz and 60 Hz AC electrical systems.
What are the high temperature operating limits for this electronic circuit breaker?
This unit has a maximum temperature rating of 158 degrees F. However, when operating in ambient conditions exceeding 104 degrees F (40 degrees C), derating the circuit breaker is recommended to maintain safe terminal temperatures and prevent nuisance tripping.
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