Eaton / Cutler-HammerNGS312032E
Eaton / Cutler-Hammer NGS312035EC Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
NGS312035EC
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
NGS312035EC
Quantity
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Eaton / Cutler-Hammer NGS312035EC - 1200A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for demanding commercial and industrial applications, the Eaton NGS312035EC is a high-capacity molded case circuit breaker from the Series G lineup. This bolt-on unit is 100% rated, allowing continuous operation at its full 1200A capacity without derating. It replaces older ND312035 models and integrates into standard switchboards and motor control centers. The onboard electronic trip unit provides adjustable long-time, short-time, and ground fault (LSG) sensing capabilities.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | NGS312035EC |
| Series | NGS |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 85kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 500-1200A |
|---|
| Terminal Type | Stud/Tapped Pad |
|---|---|
| For Use With | Eaton Series G Panelboards, Switchboards, Motor Control Centers |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSG |
| Trip Function | Long-Time, Short-Time, Ground Fault |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Lug Kits |
|---|---|
| Accessories | 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 | 100% Rated, Reverse Feed, True RMS Sensing, HACR Rated, Current Limiting |
Product FAQs
7 answersIs the Eaton NGS312035EC rated for 100 percent continuous current?
Yes, the C suffix in the catalog number indicates this breaker is 100 percent rated. It can carry its full 1200A capacity continuously without the standard 80 percent derating, provided it is installed in an appropriately sized and ventilated enclosure.
What specific settings can be adjusted on the LSG trip unit?
The Digitrip 310+ electronic trip unit allows precise coordination by letting you adjust the Long-Time pickup and delay, Short-Time pickup and delay, and Ground-Fault pickup and delay.
Are wire lugs included with the NGS312035EC?
No, this breaker is supplied with standard imperial tapped pad terminals for busbar connections. If you are terminating copper or aluminum cables, you will need to source compatible mechanical or compression lugs separately.
Does the NGS312035EC require an external ground-fault relay?
No, the integrated LSG trip unit provides built-in ground-fault protection. You can adjust the ground-fault pickup and delay directly on the breaker face, eliminating the need for external relays and CTs in most applications.
Can I use the Eaton NGS312035EC to replace an older Cutler-Hammer breaker with the exact same part number?
Yes. Eaton acquired Cutler-Hammer and continues to manufacture the Series G NG-frame under the Eaton name. The NGS312035EC is a direct, drop-in replacement for the legacy Cutler-Hammer version.
Can this breaker be DIN-rail mounted?
No, the NGS312035EC is a large NG-frame breaker that requires a bolt-on installation directly to the busbars of compatible Eaton switchboards, panelboards, or motor control centers.
What is the difference between the NGS312035EC and the NGC312035EC?
The difference is the interrupting capacity. The standard NGS312035EC is rated for 50kA at 480VAC, while the high-capacity NGC312035EC is rated for 100kA at 480VAC. You must verify your system's available fault current to choose the correct frame.
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