Eaton / Cutler-HammerNGS312032E
Eaton / Cutler-Hammer NGS312039E Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Unit Mount
Eaton / Cutler-Hammer
NGS312039E
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
NGS312039E
Quantity
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Eaton / Cutler-Hammer NGS312039E - 1200A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for industrial power distribution, the Eaton NGS312039E is a 1200A, 3-pole MCCB from the Series G NG-Frame family. The integrated Digitrip 310+ electronic trip unit provides adjustable LSIG sensing for precise coordination. This unit mount breaker installs into Eaton Series G panelboards and switchboards, serving as a direct replacement for legacy ND312039 breakers. It features a 50 kAIC rating at 480VAC, Zone Selective Interlocking, and an Arcflash Reduction Maintenance System.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 |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSIG |
| Trip Function | Long-Time, Short-Time, Instantaneous, Ground Fault |
| 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, Arcflash Reduction Maintenance System |
Product FAQs
6 answersWhat enclosures and equipment are compatible with the NGS312039E?
This Series G NG-frame breaker is designed for installation in Eaton panelboards, switchboards, and motor control centers.
How does the ALSIG trip unit on the NGS312039E improve worker safety?
The ALSIG designation includes an Arcflash Reduction Maintenance System (ARMS). When activated during maintenance, this mode lowers the instantaneous trip threshold to reduce potential arc flash energy.
Is the NGS312039E rated for 100 percent continuous operation?
No, this specific catalog number carries a standard 80 percent continuous current rating.
What type of terminal connections does the NGS312039E use?
It features a unit mount, bolt-on design with imperial tapped pads on both the line and load sides for attaching mechanical lugs or busbar connections.
What specific parameters can be adjusted on the ALSIG trip unit?
The electronic trip unit allows precise adjustments for long-time pickup and delay, short-time pickup and delay, instantaneous pickup, and ground fault pickup and delay, alongside the maintenance mode setting.
Does the NGS312039E replace older Cutler-Hammer NG-frame breakers?
Yes, Eaton and Cutler-Hammer Series G breakers are identical. This unit will directly replace older Cutler-Hammer models with the exact same NGS312039E catalog number.
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