Square D PKL36060CU31A Molded Case Circuit Breaker
- 600A
- 3 Pole
- Unit Mount
Quantity
Square D PKL36060CU31A - 600A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for heavy-duty use, the Square D PKL36060CU31A is a 600A, 3-pole PowerPacT P-Frame circuit breaker. It is 100% rated to handle continuous current loads. The unit-mount design installs into Square D switchboards, motor control centers, and P-Frame enclosures. It features lug terminals for up to 500 kcmil wire. It includes a MicroLogic 3.0 trip unit for adjustable long-time and instantaneous (LI) protection. The breaker provides true RMS sensing and a 50kAIC rating at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | PKL36060CU31A |
| Series | PKL |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 50kA @ 480VAC, 50kA @ 600VAC |
| Amperage Range | 240-600A |
|---|
| Frame Type | P |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, PowerPacT P-Frame Enclosures |
| Wire Gauge | (3) 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, Padlock Attachment, Motor Operator, Rotary Handle, Lug Kits |
|---|---|
| Accessories | Micrologic 3.0 Trip Unit, Lugs |
| 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 |
Product FAQs
6 answersIs the PKL36060CU31A rated for 100 percent continuous current?
Yes. The "C" in the catalog number indicates this breaker is 100 percent rated. This allows it to carry its full 600A capacity continuously when installed in a properly sized and ventilated enclosure, rather than the standard 80 percent limit.
What adjustability does the Micrologic 3.0 trip unit provide?
The Micrologic 3.0 (U31A) electronic trip unit features adjustable Long-Time and Instantaneous (LI) settings. It includes a Type A rating plug, allowing the long-time pickup to be dialed from 0.4 to 1.0 times the 600A sensor rating, which translates to an adjustable range of 240A to 600A.
Where can the PKL36060CU31A be installed?
This unit-mount, feed-thru breaker is designed for installation in Square D switchboards, motor control centers, and dedicated PowerPacT P-Frame enclosures. It is not compatible with I-Line panelboards, which require a plug-on mounting configuration.
What are the lug requirements for this breaker?
The factory-installed lugs on both the line and load sides accept three 3/0 AWG to 500 kcmil aluminum or copper conductors per phase. Installers must ensure the enclosure provides adequate wire bending space for parallel 500 kcmil conductors.
Can this breaker replace an older Square D 600A P-Frame?
Yes, the PKL36060CU31A is a direct replacement for older unit-mount PowerPacT P-Frame breakers with the same K-class interrupting rating and LI trip functions. Verify that your existing setup uses unit mounting rather than I-Line plug-on connections before replacing.
Does this breaker provide ground fault protection?
No. The Micrologic 3.0 trip unit provides Long-Time and Instantaneous (LI) protection only. It does not include Short-Time or Ground Fault protection. If equipment ground fault protection is required by code, a breaker with a Micrologic 6.0 (LSIG) trip unit is necessary.
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