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Federal Pacific HEJ231150 Molded Case Circuit Breaker
- 150A
- 3 Pole
- Bolt-On
Federal Pacific
HEJ231150
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
HEJ231150
Quantity
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Federal Pacific HEJ231150 - 150A 3 Pole Molded Case Circuit Breaker
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Description
Designed to keep legacy electrical systems operational, the HEJ231150 is a 150-amp, three-pole molded case circuit breaker. It provides essential long-time and instantaneous trip functions for commercial facilities utilizing older Federal Pacific infrastructure. This unit mounts into FPE panelboards via a secure bolt-on connection. It serves as an exact substitute for the NEJ231150, requiring no special adapters. With a 42kAIC rating at 240VAC, it offers extra high interrupting capacity.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | HEJ231150-R |
| Series | HEJ |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific Panelboards |
| Wire Gauge | 4 AWG - 300 kcmil |
| Max Wire | 300 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Extra High Interrupting Capacity |
Product FAQs
5 answersWhich panelboards are compatible with the HEJ231150 circuit breaker?
This breaker is designed for use in legacy Federal Pacific Electric (FPE) panelboards, specifically CDP series panelboards that accept H-frame bolt-on breakers. Proper bus connection hardware, such as the OEM KCDP2C strap kit, is required for mounting.
Can the HEJ231150 replace an NEJ231150 breaker?
Yes. The HEJ231150 shares the same physical dimensions and mounting footprint as the standard NEJ231150 but offers a higher interrupting capacity of 42kAIC at 240V. It serves as a direct, bolt-on upgrade or replacement without requiring special adapters.
What wire sizes are accepted by the load side lugs on this breaker?
The factory-installed load side lugs accommodate wire gauges ranging from 4 AWG up to 300 kcmil. Ensure proper torque specifications are followed during installation to maintain a secure electrical connection.
How does the fixed LI trip unit operate on this breaker?
The LI designation indicates that the breaker provides Long-Time (L) thermal protection against overloads and Instantaneous (I) magnetic protection against short circuits. Both the thermal and magnetic trip points are fixed and cannot be adjusted in the field.
What should be inspected before installing this legacy FPE breaker?
Before installing the HEJ231150 into an existing Federal Pacific panelboard, inspect the busbars and mounting hardware for signs of pitting, corrosion, or thermal damage. Verify that the 42kAIC rating is sufficient for the available fault current at the installation point.
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