Eaton / Cutler-Hammer NGH312038EC Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Bolt-On
Quantity
Eaton / Cutler-Hammer NGH312038EC - 1200A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Designed for commercial environments, the Eaton NGH312038EC is a 1200A Series G molded case circuit breaker. It utilizes a Digitrip 310+ electronic trip unit for precise ALSI overcurrent protection. This 3-pole, bolt-on MCCB installs into Eaton Series G panelboards and motor control centers. It serves as an exact replacement for the PDG53M1200E3CN. Rated for 100% continuous operation, it provides a 100kAIC interrupting capacity at 240V.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 | ALSI |
| Trip Function | Arcflash Reduction, Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator |
|---|---|
| Accessories | Digitrip 310+ Trip Unit |
| 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, HACR Rated, Current Limiting, Reverse Feed, True RMS Sensing |
Product FAQs
7 answersWhat does the ALSI designation mean on the NGH312038EC trip unit?
ALSI indicates the breaker is equipped with an electronic trip unit featuring Arcflash Reduction Maintenance System (ARMS), Long-Time, Short-Time, and Instantaneous protection. This allows for precise coordination and enhanced safety during maintenance.
How does the Arcflash Reduction Maintenance System (ARMS) function on this breaker?
When the maintenance mode is enabled, the ARMS circuit bypasses standard delay settings to trip the breaker with no intentional delay if the configured pickup level is exceeded. This drastically reduces arc flash energy and improves safety for personnel working on energized equipment.
Which terminal lugs are compatible with the NGH312038EC?
This breaker comes standard with stud or tapped pad connections. For wire terminations, it accepts Eaton NG-frame lug kits such as the TA1200NB1, which accommodates four 4/0 AWG to 500 kcmil copper or aluminum conductors per phase.
Can the NGH312038EC be installed in standard residential load centers?
No. This is a 1200A NG-frame molded case circuit breaker designed strictly for industrial applications. It is compatible only with Eaton Series G panelboards, switchboards, and motor control centers that support bolt-on NG-frame breakers.
Is the trip curve on the NGH312038EC adjustable?
Yes. The solid-state electronic trip unit allows electricians to adjust the long-time, short-time, and instantaneous pickup and delay settings. This provides maximum flexibility for selective coordination in complex power distribution systems.
Does the NGH312038EC require a separate rating plug?
No. The advanced electronic trip unit features an adjustable continuous current switch. This eliminates the need for interchangeable rating plugs and allows you to configure the continuous current directly on the breaker.
What type of current sensing does the NGH312038EC use?
The electronic trip unit utilizes true RMS (Root Mean Square) sensing. This provides highly accurate overcurrent protection, even in electrical systems with significant harmonic distortion from variable frequency drives or other solid-state loads.
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