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Eaton / Westinghouse HLB3250 Molded Case Circuit Breaker
- 250A
- 3 Pole
- Bolt-On
Eaton / Westinghouse
HLB3250
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
HLB3250
Quantity
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Eaton / Westinghouse HLB3250 - 250A 3 Pole Molded Case Circuit Breaker
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Description
Built for legacy Westinghouse systems, the Eaton HLB3250 is a 250A, 3-pole molded case circuit breaker. It utilizes thermal-magnetic technology with an adjustable magnetic response to protect commercial networks. Designed as a bolt-on MCCB, it installs into older panelboards and motor control centers. It is replaced by the KD3250, which necessitates a TAD3 spacer kit for installation. Delivering 65kAIC at 240VAC, this Mark 75 L-Frame breaker ensures high interrupting capacity.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | HLB3250-R |
| Series | HLB |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 22kA @ 250VDC |
| Frame Type | LB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 1 AWG - 600 kcmil (Al/Cu) or (2) 1 AWG - 250 kcmil (Al/Cu) |
| Max Wire | 600 kcmil |
| Min Wire | 1 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 |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, Interchangeable Trip Unit |
Product FAQs
6 answersAre Eaton, Cutler-Hammer, and Westinghouse HLB3250 breakers the same?
Yes. Eaton acquired the Westinghouse distribution equipment division in the early 1990s. An HLB3250 branded as Eaton, Cutler-Hammer, or Westinghouse will have the same physical dimensions, mounting, and electrical characteristics.
What does the H in the HLB3250 part number indicate?
The H designates a high interrupting rating. While a standard LB3250 breaker is typically rated for 30kA at 480V, the HLB3250 is part of the Mark 75 family and provides a higher 35kA interrupting capacity at 480V, along with 65kA at 240V.
Can I use the HLB3250 to replace an older Westinghouse LB3250?
Yes, the HLB3250 shares the same physical dimensions and bolt-on mounting configuration as the standard LB3250. It can be used as a direct replacement while providing a higher interrupting capacity.
What is the modern replacement for the HLB3250?
The Eaton KD3250 is the modern equivalent for this breaker. However, because the KD frame has different physical dimensions than the legacy L frame, installing a KD3250 in an older Westinghouse panelboard requires a TAD3 spacer kit.
Does the HLB3250 feature an interchangeable trip unit?
Yes, this L-frame breaker is designed with an interchangeable trip unit. This allows panel builders to replace or upgrade the thermal-magnetic trip mechanism without needing to remove the entire breaker frame from the switchboard.
What safety precautions should be taken before installing the HLB3250?
Always de-energize the panelboard or switchboard before installation. Verify that the available fault current at the installation point does not exceed the breaker's 35kA rating at 480V or 65kA rating at 240V to ensure safe operation during a short circuit.
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