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Eaton / Westinghouse HMCG3800 Molded Case Circuit Breaker
- 800A
- 3 Pole
- Bolt-On
Eaton / Westinghouse
HMCG3800
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
HMCG3800
Quantity
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Eaton / Westinghouse HMCG3800 - 800A 3 Pole Molded Case Circuit Breaker
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Description
Part of the legacy LC/MC frame group, the Eaton HMCG3800 provides 800-amp, 3-pole circuit protection for commercial and industrial applications. It installs into older Eaton Series C panelboards, Westinghouse switchboards, and motor control centers, ensuring a seamless fit for aging infrastructure. Featuring a Seltronic electronic trip unit with adjustable LSG functions, it offers advanced coordination and ground fault protection. This robust breaker is rated at 65kAIC at 240V.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Series | HMCG |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Westinghouse 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 | Rating Plug, Shunt Trip, Auxiliary Switch, Undervoltage Release |
|---|---|
| Accessories | Rating Plug |
| Standards | CSA C22.2 No. 5.1, IEC 157-1, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
8 answersWhat equipment is the HMCG3800 designed to fit?
This legacy LC/MC frame breaker is engineered for installation in older Eaton Series C panelboards, Westinghouse switchboards, and motor control centers. It provides a direct replacement option for aging infrastructure without requiring a complete panel upgrade.
What does the LSG trip function on this breaker indicate?
The LSG designation means the electronic trip unit provides adjustable protection for Long-Time, Short-Time, and Ground-Fault conditions. This allows for precise coordination with other protective devices in the system.
Does this breaker require a separate ground-fault relay?
No. The HMCG3800 features integrated ground-fault protection as part of its LSG electronic trip unit, eliminating the need for external ground-fault relays or sensors in the enclosure.
Is the HMCG3800 the same as an Eaton Cutler-Hammer breaker?
Yes. Westinghouse distribution equipment was acquired by Eaton Cutler-Hammer. Breakers marked with the Westinghouse, Cutler-Hammer, or Eaton brand that share the HMCG3800 catalog number are physically and electrically identical.
How are the load conductors terminated on this breaker?
The breaker utilizes lug terminals for load connections. When installing, ensure the lugs are torqued to the manufacturer specifications printed on the breaker faceplate to maintain a secure and safe connection.
What does the H in HMCG3800 signify?
The H designates this as a high-interrupting capacity version of the standard MC frame breaker, offering elevated fault current protection for demanding industrial applications.
What is the advantage of the Seltronic solid-state trip unit?
The Seltronic electronic trip unit offers highly accurate, adjustable settings compared to traditional thermal-magnetic breakers. This allows electricians to precisely match the breaker trip curve to the specific load requirements and prevent nuisance tripping.
How is the HMCG3800 secured within the enclosure?
It is a bolt-on circuit breaker that fastens directly to the panel busbar. Installers must ensure all mounting hardware is properly torqued to the manufacturer specifications to prevent electrical hot spots.
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