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Schneider Electric LJL36400U33X Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Schneider Electric
LJL36400U33X
Molded Case Circuit Breaker
Brand
Schneider Electric
SKU
LJL36400U33X
Quantity
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Schneider Electric LJL36400U33X - 400A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for heavy-duty industrial applications, this 400A PowerPacT L-Frame breaker offers dependable performance in motor control centers and control panels. It features a unit-mount lug configuration for secure wire termination in standard enclosures. The factory-installed MicroLogic 3.3S electronic trip unit allows precise adjustments for long-time, short-time, and instantaneous (LSI) protection, ensuring optimal coordination and true RMS sensing across complex electrical networks.Specifications
| Brand | Schneider Electric |
|---|---|
| Series | LJL |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 125-400A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Switchboards, Motor Control Centers, Control Panels |
| Wire Gauge | 2 x 2/0 AWG-500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle |
|---|---|
| Accessories | MicroLogic 3.3S Trip Unit (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, HACR, RoHS, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, True RMS Sensing, 80% Rated, Double-Break Rotary Contact Structure, RoHS Compliant, Mercury Free, PVC Free |
Product FAQs
8 answersWhat type of trip unit is installed in the LJL36400U33X?
This breaker features a factory-installed MicroLogic 3.3S electronic trip unit. It provides adjustable LSI (Long-Time, Short-Time, and Instantaneous) protection for precise coordination in complex electrical networks.
How is the LJL36400U33X circuit breaker mounted?
This is a unit-mount circuit breaker designed for standard enclosure mounting. It is secured using mounting screws and is not compatible with I-Line panelboards, which require a different plug-on bracket configuration.
What wire sizes are accepted by the lugs on this 400A L-Frame breaker?
The factory-installed line and load lugs accept two 2/0 AWG to 500 kcmil aluminum or copper conductors per phase. Ensure conductors are cut square and torqued to the manufacturer specifications during installation.
Is the LJL36400U33X rated for 80% or 100% continuous current?
This breaker has a standard 80% continuous current rating. It is designed to carry up to 80% of its 400A nominal rating (320A) continuously under normal operating conditions.
What types of equipment is the LJL36400U33X compatible with?
This PowerPacT L-Frame breaker is designed for use in Square D switchboards, motor control centers, and industrial control panels that accommodate unit-mount configurations.
Does the LJL36400U33X include a manual testing mechanism?
Yes, all PowerPacT L-Frame circuit breakers feature an integral push-to-trip button on the front cover. This allows qualified personnel to manually trip the breaker to verify the mechanical operation of the trip mechanism before energizing.
Why is proper lug torque critical when installing the LJL36400U33X?
Under-torqued lugs can lead to high resistance, overheating, and potential thermal damage, while over-torquing can strip the threads or damage the conductor. Always use a calibrated torque wrench and follow the torque values printed on the breaker faceplate or lug label.
Can I use the LJL36400U33X to replace an older Square D 400A L-Frame breaker?
Yes, this PowerPacT L-Frame breaker can often replace legacy Square D 400A unit-mount breakers with similar dimensions and specifications. However, you must verify that the interrupting ratings, LSI trip functions, and physical mounting dimensions match your existing enclosure requirements.
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