Square D MELC836LSI Molded Case Circuit Breaker
- 800A
- 3 Pole
- Unit Mount
Quantity
Square D MELC836LSI - 800A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Designed for demanding industrial environments, this 800-amp molded case breaker delivers robust power distribution protection with its configurable Long-Time, Short-Time, and Instantaneous (LSI) Micrologic trip unit. It mounts into standard Square D switchboards and features a 100% continuous current rating for maximum efficiency. Although replaced by the PLL36080U33A PowerPacT breaker, it serves as a crucial exact-fit replacement for existing systems.Specifications
| Brand | Square D |
|---|---|
| Part Number | MELC836LSI |
| Series | MELC |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 100kA @ 480VAC, 25kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Switchboards, 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 | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | 100% Rated, True RMS Sensing, Micrologic Trip Unit |
Product FAQs
7 answersWhat enclosures or switchboards is the MELC836LSI compatible with?
This unit-mount breaker is designed for installation in Square D switchboards and individual enclosures that accept legacy M-frame circuit breakers.
Can I use this breaker in an I-Line panelboard?
No, the MELC836LSI is a unit-mount breaker with lug terminals. It is not compatible with I-Line panelboards, which require plug-on I-Line brackets.
What does the LSI designation mean on the MELC836LSI?
LSI indicates the breaker is equipped with an electronic trip unit featuring adjustable Long-Time, Short-Time, and Instantaneous trip functions for precise system coordination.
What wire sizes are accepted by the standard lugs on this breaker?
The lugs on the MELC836LSI accept three 3/0 AWG to 500 kcmil aluminum or copper wires per phase.
How is the MELC836LSI mounted?
It is a unit-mount, or feed-thru, breaker. It bolts directly to the mounting surface or enclosure backpan and is wired using the provided lugs on both the line and load sides.
Is the MELC836LSI a current production model?
The MELC series is a legacy Square D M-frame breaker. For new installations or modern replacements, the Square D PowerPact M-frame or P-frame series is typically used.
Does this breaker provide ground fault protection?
No, the MELC836LSI features an LSI trip unit. It does not include the G function required for integrated equipment ground fault protection.
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