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Square D PGL36120CU31A Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Unit Mount
Square D
PGL36120CU31A
Molded Case Circuit Breaker
Brand
Square D
SKU
PGL36120CU31A
Quantity
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Square D PGL36120CU31A - 1200A 3 Pole Molded Case Circuit Breaker
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Description
Delivering a 100 percent continuous current rating, this 1200A PowerPacT P-Frame breaker utilizes a factory-installed Micrologic 3.0A trip unit. The microprocessor-based design provides highly accurate, adjustable long-time and instantaneous protection for industrial loads. This unit-mount MCCB integrates perfectly into Square D P-Frame enclosures, QED switchboards, and Model 6 motor control centers. It features true RMS sensing, visual trip indicators, and a 35kAIC rating at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | PGL36120CU31A |
| Series | PGL |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Amperage Range | 480-1200A |
|---|
| Frame Type | PGL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D P-Frame Enclosures, QED Switchboards, Model 6 Motor Control Centers |
| Wire Gauge | (4) 3/0 AWG-500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Trip Unit Model | MicroLogic 3.0 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included, Micrologic 3.0A Trip Unit (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, 100% Rated, True RMS Sensing, Visual Trip Indicator |
Product FAQs
8 answersDoes the PGL36120CU31A carry a 100 percent continuous current rating?
Yes, the C in the catalog number indicates this breaker is 100 percent continuous current rated. It can carry its full 1200A capacity continuously without derating when installed in an appropriately sized and ventilated enclosure.
What is the difference between the standard PGL36120 and the PGL36120CU31A?
The base PGL36120 typically comes with a basic, non-interchangeable ET 1.0I trip unit and a standard 80 percent continuous current rating. The PGL36120CU31A is 100 percent continuous rated and features an advanced Micrologic 3.0 interchangeable trip unit with adjustable long-time and instantaneous functions.
How many wires does the PGL36120CU31A lug configuration accommodate?
The factory lugs on this breaker are designed to accept four conductors per phase. They are compatible with both aluminum and copper wire ranging from 3/0 AWG to 500 kcmil.
What equipment is the PGL36120CU31A designed to be installed in?
This unit mount circuit breaker is designed for direct mounting in Square D P-Frame enclosures, QED switchboards, and Model 6 motor control centers.
Does the Micrologic 3.0 trip unit offer ground fault protection?
No. The U31A suffix denotes a Micrologic 3.0 trip unit, which provides only long-time and instantaneous (LI) protection. It does not include short-time or equipment ground fault (LSIG) protective features.
Is this breaker designed for plug-on I-Line panelboards?
No, the PGL36120CU31A is a unit mount circuit breaker featuring lugs on both the line and load sides. It is not compatible with I-Line bussing systems, which require a plug-on specific frame like the PGA series.
Can I upgrade the trip unit on this breaker in the field?
Yes. The Micrologic 3.0 trip unit included with the PGL36120CU31A is interchangeable. This allows qualified personnel to remove and upgrade to a more advanced Micrologic trip unit without replacing the entire 1200A breaker frame.
Can I use this breaker on a 480V system with an available fault current of 50kA?
No. The PGL36120CU31A has a maximum interrupting rating of 35kA at 480VAC. If your system has a 50kA available fault current at 480V, you must select a breaker with a higher interrupting tier, such as the PJL or PKL series.
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