Federal Pacific NM632450 Molded Case Circuit Breaker
- 450A
- 3 Pole
- Bolt-On
Quantity
Federal Pacific NM632450 - 450A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Part of the N-frame series, this 450-amp molded case circuit breaker provides reliable overcurrent protection for commercial and industrial applications. It features a rugged bolt-on mounting configuration. Engineered as an exact replacement component, the unit installs into legacy Federal Pacific switchgear and NM panelboards without requiring aftermarket adapters. Rated for 30 kAIC at 480VAC, the breaker utilizes thermal-magnetic trip technology with an interchangeable trip unit.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NM632450 |
| Series | NM |
| Amperage | 450A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC |
| Frame Type | NM |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific Switchgear / Panelboards |
| Wire Gauge | (2) 3/0 AWG - 600 kcmil |
| Max Wire | 600 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 |
|---|---|
| Accessories | Load Side Lugs |
| Standards | NEMA AB-1, UL 489 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit |
Product FAQs
5 answersWhat enclosures are compatible with the Federal Pacific NM632450?
This N-frame breaker is engineered as an exact drop-in replacement for legacy Federal Pacific switchgear and NM series panelboards. It bolts directly into the bus without requiring custom aftermarket adapters.
Are the trip settings on the NM632450 adjustable?
The thermal-magnetic trip unit features a fixed thermal element for long-time overload protection and an adjustable magnetic element. This allows electricians to tune the instantaneous short-circuit response for proper coordination with downstream devices.
Can the trip unit be replaced without removing the entire breaker?
Yes, the NM632450 features an interchangeable trip unit design. This allows panel builders to swap or upgrade the trip unit while leaving the main N-frame bolted to the switchgear bus.
What wire sizes do the load-side lugs accept?
The included lugs are designed to accept dual conductors, accommodating wire gauges from 3/0 AWG up to 600 kcmil. This supports the parallel cable runs commonly required for 450A commercial circuits.
How does the LI trip function protect the circuit?
The LI trip profile provides both long-time and instantaneous protection. The thermal mechanism handles sustained overloads, while the magnetic mechanism quickly clears severe short circuits, ensuring safety for heavy-duty commercial loads.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- JGJoseph G.ReviewingFederal Pacific NM031500 Trip UnitI recommend this productRated 5 out of 5 stars2/1/18The best
Just what I expected