Eaton / Westinghouse HLM3800 Molded Case Circuit Breaker
- 800A
- 3 Pole
- Panel Mount
Quantity
Eaton / Westinghouse HLM3800 - 800A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Mounting into classic Westinghouse switchboards, the HLM3800 is an 800A, 3-pole MCCB from Eaton's Series C L-Frame lineup. It provides reliable thermal-magnetic protection with an adjustable magnetic trip. Designed to fit Pow-R-Line panelboards and motor control centers, it ensures a seamless installation. It serves as an exact replacement for discontinued systems, superseded by the HMDL3800 for newer setups. Rated at 35kAIC at 480V, it features Mark 75 high interrupting capacity.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | HLM3800-R |
| Series | HLM |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 75kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 20kA @ 250VDC |
| Frame Type | LM |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse Switchboards, Motor Control Centers, Pow-R-Line Panelboards |
| Wire Gauge | (3) 3/0 AWG-400 kcmil (Aluminum/Copper) |
| Max Wire | 400 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, Interchangeable Trip Unit |
Product FAQs
5 answersWill an Eaton HLM3800 fit in my older Westinghouse motor control center or switchboard?
Yes. Eaton acquired the Westinghouse distribution equipment line, and the modern Eaton or Cutler-Hammer HLM3800 is the exact same Series C LM-frame breaker as the original. It will physically fit and integrate into vintage Westinghouse MCCs, switchboards, and Pow-R-Line panelboards without modification.
What does the H in the HLM3800 catalog number indicate?
The H designates this as the high-interrupting capacity version of the standard LM frame. It provides a 35kA interrupting rating at 480VAC, compared to the 18kA rating of a standard LM3800 breaker.
What is the modern replacement for the HLM3800 circuit breaker?
The HLM3800 is a legacy Series C breaker. For newer setups or when migrating to current standards, the Eaton HMDL3800 is the direct superseding replacement. However, the HLM3800 remains an exact fit for vintage Westinghouse enclosures without requiring complex retrofits.
How does the LI trip unit on the HLM3800 function?
The LI designation stands for Long-Time and Instantaneous protection. The Long-Time thermal element is fixed at 800 amps for continuous overload protection. The Instantaneous magnetic trip is adjustable, allowing electricians to fine-tune the short-circuit response to coordinate with downstream devices.
What size wire do the standard lugs on the HLM3800 accept?
When equipped with standard lugs, the HLM3800 accepts three 3/0 AWG to 400 kcmil aluminum or copper conductors per phase. Always use a calibrated torque wrench to meet the manufacturer specifications during installation.
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