Eaton / Cutler-Hammer NGH312039EC Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Bolt-On
Quantity
Eaton / Cutler-Hammer NGH312039EC - 1200A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for high-demand applications, the Eaton NGH312039EC is a 1200A, 100% rated molded case circuit breaker. It features an electronic trip unit for complete ALSIG coverage and ground fault monitoring. This 3-pole NG-frame breaker bolts into Eaton Series G panelboards and switchboards. It serves as a drop-in substitute for the PDF53M1200E5NN. With a 100kAIC capacity at 240V, it handles severe faults reliably. The Arcflash Reduction Maintenance System provides advanced safety.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | NGH |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC |
| Amperage Range | 600-1200A |
|---|
| 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 | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Handle Mechanism, Lug Kits |
|---|---|
| Accessories | Lugs Not Included, Mounting Hardware |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, HACR, IEC, UL |
| Temp Rating | -20C to 70C |
| Construction Features | 100% Rated, High Interrupting Capacity, HACR Rated, Reverse Feed, True RMS Sensing, Arcflash Reduction Maintenance System |
Product FAQs
9 answersWhat does the C in NGH312039EC stand for?
The C suffix indicates that this circuit breaker is 100% continuous duty rated. This means it can carry its full 1200A continuous current rating in an appropriately sized enclosure, whereas standard breakers are typically 80% rated.
What trip functions are included in the ALSIG designation?
ALSIG stands for Arcflash Reduction Maintenance System (ARMS), Long-time, Short-time, Instantaneous, and Ground-fault protection. This provides comprehensive adjustability and enhanced personnel safety during maintenance.
What is the Arcflash Reduction Maintenance System (ARMS)?
The Arcflash Reduction Maintenance System (the A in ALSIG) allows a worker to temporarily lower the instantaneous trip threshold. This reduces the fault clearing time, significantly lowering the incident energy and improving safety for personnel working on energized equipment.
What type of trip unit does the NGH312039EC use?
It uses an Eaton Digitrip 310+ electronic trip unit, which provides the adjustable ALSIG protection functions and allows for precise coordination in complex electrical systems.
Can the NGH312039EC be reverse fed?
Yes. All Eaton NG-frame circuit breakers are suitable for reverse feed applications.
Does the NGH312039EC come with lugs?
No. Eaton NG-frame circuit breakers do not ship with lugs. Lugs or terminal connectors must be purchased separately based on your specific wire size and material requirements.
What is the difference between the NGH312039E and the NGH312039EC?
The C at the end of the NGH312039EC catalog number indicates it is 100% continuous duty rated. The standard NGH312039E is an 80% rated breaker.
What does the H in the NGH312039EC catalog number indicate?
The H indicates the high interrupting capacity tier for the Eaton NG-frame. It provides a 65 kAIC rating at 480VAC, compared to the standard NGS tier (50 kAIC) or the ultra-high NGC tier (100 kAIC).
Is the NGH312039EC suitable for heating, air conditioning, and refrigeration applications?
Yes. Like all Eaton NG-frame circuit breakers, the NGH312039EC is HACR rated for use in heating, air conditioning, and refrigeration equipment.
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