Eaton / Cutler-HammerNGS312032E
Eaton / Cutler-Hammer NGS312038E Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Unit Mount
Eaton / Cutler-Hammer
NGS312038E
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
NGS312038E
Quantity
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Eaton / Cutler-Hammer NGS312038E - 1200A 3 Pole Molded Case Circuit Breaker
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Description
Engineered with a Digitrip 310+ LSI unit, this 1200A Series G breaker provides advanced coordination for industrial applications. The NG-frame design delivers reliable microprocessor-based sensing. Designed for unit-mount configurations, it integrates into Eaton panelboards and motor control centers. It serves as an exact replacement for legacy ND312038 models. Rated at 85 kAIC at 240V, it features an Arcflash Reduction Maintenance System to enhance personnel safety during maintenance.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 | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Lugs, Handle Lock, Rotary Handle |
|---|---|
| Accessories | Digitrip 310+ Trip Unit |
| 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, Reverse Feed, 80% Rated, Zone Selective Interlocking, Arcflash Reduction Maintenance System |
Product FAQs
9 answersWhat equipment is the Eaton NGS312038E circuit breaker designed to fit?
This NG-frame breaker is compatible with Eaton Series G panelboards, switchboards, and motor control centers. It is designed for unit mount installations and requires adequate enclosure space for a 1200A frame.
What does the ALSI trip function on the NGS312038E include?
The ALSI designation indicates this breaker features an electronic trip unit with an Arcflash Reduction Maintenance System, along with adjustable long-time, short-time, and instantaneous trip functions. The maintenance mode helps protect personnel by reducing fault clearing time during live work.
Is the 1200A rating on the NGS312038E adjustable?
Yes, the electronic Digitrip unit allows for adjustable trip settings. You can modify the long-time, short-time, and instantaneous pickup and delay settings to coordinate with other protective devices in your electrical system.
How are the line and load connections made on the NGS312038E?
This breaker features a bolt-on connection style with imperial stud or tapped pad terminals. You will need appropriate wire lugs or busbar hardware to terminate the conductors securely.
Can the NGS312038E replace older Cutler-Hammer NG-frame breakers?
Yes, Eaton and Cutler-Hammer share the same Series G NG-frame footprint. The NGS312038E can directly replace older Cutler-Hammer breakers with the same catalog number or upgrade standard LSI breakers to include the Arcflash Reduction Maintenance System.
Does this breaker support field-installable accessories?
Yes, Eaton Series G NG-frame breakers support a variety of field-fit internal accessories, including shunt trips, undervoltage releases, and auxiliary switches. These install directly into the breaker without voiding the UL listing.
How does the Arcflash Reduction Maintenance System (ARMS) work on this breaker?
The ARMS feature allows an operator to temporarily lower the instantaneous trip threshold before approaching the equipment. If a fault occurs, the breaker trips much faster than standard settings, significantly reducing the incident arc flash energy and improving worker safety.
Is the NGS312038E rated for direct current (DC) applications?
No, this breaker is equipped with an AC-only electronic trip unit and is rated for 240VAC, 480VAC, and 600VAC systems. It is not designed or rated for DC circuits.
What does the S in the NGS312038E catalog number signify?
In the Eaton Series G nomenclature, the S indicates the standard interrupting capacity tier for the NG-frame. This provides 50kAIC at 480V, which sits below the higher-rated NGH and NGC versions.
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