Siemens SHMD6B800LSI Molded Case Circuit Breaker
- 800A
- 3 Pole
- Unit Mount
Quantity
Siemens SHMD6B800LSI - 800A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for heavy-duty industrial applications, the Siemens SHMD6B800LSI is a 3-pole, 800A molded case circuit breaker from the Sentron series. It delivers reliable overcurrent protection for commercial and industrial power distribution systems. This unit-mount MD-frame breaker installs into Siemens Sentron panelboards, switchboards, and motor control centers.Specifications
| Brand | Siemens |
|---|---|
| Series | SHMD6 |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 50kA @ 600VAC |
| Frame Type | MD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, Switchboards, Motor Control Centers |
| 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, Lugs (TA3K500) |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, HACR Rated, Reverse Feed, True RMS Sensing |
Product FAQs
5 answersWhat types of equipment can accommodate the SHMD6B800LSI circuit breaker?
This Sentron MD frame breaker is designed for installation in Siemens Sentron panelboards, UL 891 switchboards, and motor control centers. It is commonly used for large feeder circuits in commercial and industrial power distribution networks.
How does the LSI electronic trip unit improve system protection?
The LSI designation means the breaker includes adjustable Long-Time, Short-Time, and Instantaneous trip functions. This allows facility engineers to precisely tune the overcurrent protection and intentional tripping delays, ensuring selective coordination with downstream breakers.
What does the SHMD prefix indicate in the Siemens catalog number?
In the Siemens Sentron series, the "S" indicates a Sensitrip electronic trip unit, the "H" designates a high interrupting rating, and "MD" refers to the physical frame size.
How is the SHMD6B800LSI mounted within an electrical enclosure?
This is a unit mount, feed-thru circuit breaker. It secures directly to the enclosure backpan or mounting rails rather than plugging into a busbar, and it utilizes lug terminals for the line and load wire connections.
What are the primary safety considerations when installing this MD frame breaker?
Installation must be performed by a licensed electrician following all local codes. Ensure the power supply is completely de-energized and locked out. Proper torque must be applied to all lug connections to prevent arcing or thermal failure under heavy 800A loads.
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