Eaton / Cutler-Hammer NGH308039E Molded Case Circuit Breaker
- 800A
- 3 Pole
- Bolt-On
Quantity
Eaton / Cutler-Hammer NGH308039E - 800A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for industrial power systems, the NGH308039E is an 800A molded case circuit breaker with a Digitrip 310+ electronic trip unit. It delivers comprehensive ALSIG protection, incorporating ground fault sensing and an Arcflash Reduction Maintenance System. This bolt-on NG-frame device fits Eaton Series G panelboards and switchboards. For future upgrades, this model is replaced by the PDG53M0800E5ZN. Delivering 65 kAIC at 480V, this 80% rated breaker features true RMS sensing.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | NGH |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC |
| Amperage Range | 320-800A |
|---|
| 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 | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Handle Mechanism, Lug Kits |
|---|---|
| Accessories | Lugs Not Included, Mounting Hardware |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CCC, CE, CSA, HACR, IEC, UL |
| Temp Rating | -20C to 70C |
| Construction Features | HACR Rated, Current Limiting, Reverse Feed, 80% Rated, True RMS Sensing, Arcflash Reduction Maintenance System |
Product FAQs
6 answersWhat is the purpose of the ALSIG trip unit on the NGH308039E?
The ALSIG designation indicates this breaker features an Arcflash Reduction Maintenance System (ARMS) alongside Long-Time, Short-Time, Instantaneous, and Ground-Fault protection. The maintenance mode allows personnel to temporarily lower the instantaneous trip threshold, significantly reducing potential arc flash energy during live work.
Can the NGH308039E be used in reverse-feed applications?
Yes, Eaton Series G NG-frame electronic circuit breakers are suitable for reverse-feed installations.
What does the NGH prefix signify for this 800A breaker?
The NGH prefix designates this as a high-interrupting capacity model within the Eaton Series G NG-frame family. It provides elevated fault protection compared to standard NG models, delivering a 65kAIC rating at 480VAC.
Is the NGH308039E rated for 100 percent continuous current?
No, this specific model is standard 80 percent rated. For continuous loads, the current should not exceed 80 percent of its 800A rating, which is 640A, under normal operating conditions.
How is the NGH308039E installed into electrical distribution equipment?
This breaker utilizes a bolt-on mounting style with imperial stud and tapped pad terminals. It is designed to be bolted directly to the busbars in compatible Eaton Series G panelboards, switchboards, and motor control centers.
Is the trip unit on the NGH308039E adjustable?
Yes, the Digitrip electronic trip unit features fully adjustable Long-Time, Short-Time, Instantaneous, and Ground-Fault settings. This allows electricians to precisely coordinate the breaker with other protective devices in the electrical system.
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