Federal Pacific HM632400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Bolt-On
Quantity
Federal Pacific HM632400 - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for commercial facilities, the Federal Pacific HM632400 is a 3-pole, 400A molded case breaker with fixed thermal and adjustable magnetic trip functions. The bolt-on design integrates into legacy Federal Pacific switchgear. As an exact substitute for the discontinued NM632400, it maintains existing infrastructure without adapter kits. This breaker provides a 35kAIC rating at 240V. It comes standard with load-side lugs and an interchangeable trip mechanism.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | HM632400-R |
| Series | HM |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC |
| Phase | 3 |
| AIC Rating | 35kA @ 240VAC, 22kA @ 480VAC, 22kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific Switchgear / Panelboards |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Undervoltage Release, Auxiliary Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40°C |
| Construction Features | Interchangeable Trip |
Product FAQs
6 answersWhat type of enclosures or panelboards is the HM632400 designed to fit?
This HM frame breaker is designed specifically for legacy Federal Pacific switchgear and panelboards that accept bolt-on molded case circuit breakers.
How does the adjustable magnetic trip function work on this HM frame breaker?
The HM632400 features a thermal magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element. The adjustable magnetic setting allows electricians to fine-tune the instantaneous short-circuit response to coordinate with downstream devices and specific load inrush currents.
What is the mounting configuration for the HM632400?
This is a bolt-on circuit breaker. It secures directly to the busbar of compatible Federal Pacific panelboards using bolted connections, providing a high-reliability contact suitable for 400A continuous loads. Load side lug terminals are included for cable connections.
Are there direct modern replacements for the Federal Pacific HM632400?
Because Federal Pacific is a legacy brand, direct drop-in replacements from modern manufacturers are rare for the HM frame. Electricians typically source original FPE breakers or utilize retrofit kits designed to adapt current production breakers into the existing Federal Pacific switchgear.
What safety considerations apply when installing legacy Federal Pacific breakers?
When servicing older Federal Pacific switchgear, always verify that the busbars and mounting hardware are free of pitting or thermal damage. Ensure the bolt-on connections are torqued to the manufacturer specifications to prevent high resistance joints, which are critical for safe operation at 400A.
Can this breaker be applied on 480V or 600V systems?
Yes, the HM632400 is rated for a maximum of 600VAC. It provides an interrupting capacity of 22kA at both 480VAC and 600VAC, making it suitable for heavy commercial and industrial distribution systems operating at these higher voltages.
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