Eaton / Cutler-Hammer HND312T106W Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Panel Mount
Quantity
Eaton / Cutler-Hammer HND312T106W - 1200A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for heavy-duty industrial distribution, this 1200A Series C N-Frame breaker features a programmable electronic trip unit with long-time, short-time, instantaneous, and ground-fault (LSIG) functions. It mounts into Eaton panelboards, switchboards, and motor control centers requiring a panel-mount configuration. While eventually replaced by the Series G NGH312036E, this legacy-compatible unit maintains 100kAIC at 240V and includes reverse feed capabilities for versatile installation.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HND312T106W |
| Series | HND |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC |
| Frame Type | HND |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C 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, Rotary Handle, Rating Plugs, Lug Kits, Communication Module |
|---|---|
| Accessories | Without Terminals |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, 80% Rated, Non-Interchangeable Trip |
Product FAQs
6 answersWhat equipment is the Eaton HND312T106W compatible with?
This 1200A N-Frame breaker is designed for installation in Eaton Series C panelboards, switchboards, and motor control centers.
Is the HND312T106W suitable for high fault current applications?
Yes, as an HND type breaker, it offers high interrupting capacities, including 65 kAIC at 480 VAC and 100 kAIC at 240 VAC. This makes it suitable for commercial and industrial distribution systems with elevated fault current levels.
What does the LSIG designation mean on the HND312T106W trip unit?
LSIG indicates that the electronic trip unit provides adjustable protection for Long-Time (overload), Short-Time (short circuit), Instantaneous (high-level short circuit), and Ground-Fault conditions. This allows for precise selective coordination in complex electrical systems.
How is the HND312T106W circuit breaker mounted?
It features a bolt-on connection for secure panel mounting within Series C enclosures. The breaker is designed to accept standard N-Frame lugs for heavy-duty cable termination.
What frame size does the HND312T106W belong to?
It is an N-Frame breaker within the Eaton / Cutler-Hammer Series C family. When replacing an existing breaker, ensure your panel is configured for the physical dimensions and bolt-on requirements of the N-Frame.
What safety precautions should be taken before adjusting the LSIG trip settings on the HND312T106W?
Only qualified electrical personnel should adjust the electronic trip unit. Ensure the breaker is properly isolated and de-energized before modifying the Long-Time, Short-Time, Instantaneous, or Ground-Fault settings to prevent arc flash hazards and maintain proper system coordination.
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