Square D DGL36400E53 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Quantity
Square D DGL36400E53 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Part of the PowerPacT D-Frame series, the DGL36400E53 is a 400A, 3-pole MCCB for commercial applications. It features an STR53UP electronic trip unit for precise protection. This unit-mount breaker installs into Square D panelboards. It serves as the original D-Frame equipment, which is now replaced by the LGL36400U31X L-Frame model. Rated 35kAIC at 480V, it offers adjustable LSI trip functions. True RMS sensing ensures accurate response to complex harmonic loads.Specifications
| Brand | Square D |
|---|---|
| Series | DGL |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Frame Type | DGL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D PowerPacT Panelboards and Switchboards |
| 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 |
|---|---|
| Accessories | Electronic Trip Unit STR53UP (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, True RMS Sensing, 100% Rated |
Product FAQs
9 answersWhat equipment is the Square D DGL36400E53 designed to be installed in?
This D-frame circuit breaker is designed for use in Square D PowerPacT panelboards and switchboards.
How does the DGL36400E53 mount into a panel?
This is a unit-mount, feed-thru circuit breaker. It bolts directly to the panel or enclosure backpan and connects to the bus or cables using mechanical lugs, rather than plugging into an I-Line bus.
What is the standard lug wire range for this 400A D-frame breaker?
Standard mechanical lugs for 400A PowerPacT D-frame breakers typically accept one #2 AWG to 500 kcmil aluminum or copper wire per phase.
What does the E53 suffix indicate on the DGL36400E53?
The E53 suffix indicates the breaker is equipped with an STR53UP-F solid-state electronic trip unit featuring adjustable Long-Time, Short-Time, and Instantaneous (LSI) trip functions.
What does the G in the DGL frame designation represent?
The G indicates the interrupting rating tier within the PowerPacT D-frame family. For this breaker, it provides a 35kAIC rating at 480VAC and 65kAIC at 240VAC.
Can the DGL36400E53 replace a DJL36400E53 or DLL36400E53?
The DGL36400E53 has a lower interrupting rating than the DJL or DLL frames. It can only replace them if the available fault current at the installation point is 35kA or less at 480V.
Can the DGL36400E53 be reverse fed?
Yes, standard unit-mount PowerPacT D-frame circuit breakers are suitable for reverse feeding, allowing power to be supplied to either the top or bottom terminals.
Why use an LSI electronic trip unit instead of a standard thermal-magnetic breaker?
The LSI electronic trip unit allows precise adjustment of the trip curve. This improves system coordination, ensuring that a downstream breaker trips before the main breaker during a fault, which minimizes power outages.
How can I manually test the mechanical operation of the DGL36400E53?
All Square D PowerPacT circuit breakers feature an integral push-to-trip button on the front cover. Pressing this button manually trips the breaker to verify the mechanical linkage is functioning properly.
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