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Power interruptions can cause expensive downtime, equipment damage, and unnecessary stress. Whether you are protecting a commercial facility, an industrial site, a large agricultural operation, or essential infrastructure, dependable backup power switching is just as important as the generator itself. The Cummins OTEC600 Automatic Transfer Switch | 600A 480V 3-Phase | NEMA 3R is designed to automatically transfer electrical loads between utility power and a standby generator, helping keep your critical systems operating when the utility supply fails.
Built by Cummins and equipped with the trusted PowerCommand controller, this transfer switch continuously monitors your incoming power source and responds automatically whenever utility power becomes unstable or unavailable. Once normal utility service returns, the switch safely transfers the load back while protecting connected equipment with an open-transition switching process.
The rugged NEMA 3R outdoor enclosure allows installation in demanding environments where weather resistance is required. Combined with a large 600A capacity, 480V three-phase configuration, and intuitive LCD display, this automatic transfer switch is an excellent solution for commercial buildings, manufacturing facilities, healthcare support systems, agricultural operations, mobile worksites, and other demanding applications. For facility owners and operators who value dependable backup power, simplified operation, and long-term reliability, this Cummins transfer switch provides professional-grade performance backed by one of the industry's most trusted names.
The integrated PowerCommand controller continuously watches incoming utility power. If it detects an outage or unacceptable voltage conditions, it automatically starts the generator and transfers electrical loads with minimal interruption, helping protect critical operations without requiring manual intervention.
Open-transition transfer provides a clean break before connecting the alternate power source. This prevents utility and generator sources from overlapping, helping protect electrical equipment while delivering dependable transfer performance for most commercial and industrial applications.
With a substantial 600-amp rating, this transfer switch supports larger electrical systems found in commercial buildings, industrial facilities, agricultural operations, and other demanding applications that require dependable standby power.
The durable NEMA 3R enclosure helps protect internal components from rain, snow, and outdoor environmental conditions. It provides flexibility for exterior installations while maintaining dependable operation throughout changing weather.
The built-in LCD screen allows operators to quickly view operating conditions, transfer status, alarms, and controller information. Clear system visibility simplifies monitoring and helps reduce troubleshooting time.
Routine generator exercise is important for long-term reliability. The programmable exerciser schedule automatically runs your standby generator at selected intervals to help ensure the entire backup power system remains ready.
As part of the UL 1008 listed Cummins OTEC family, this transfer switch is engineered to meet demanding industry standards for automatic transfer equipment used in standby power applications.
Cummins provides a limited warranty policy, ensuring the absence of defects in materials, workmanship, and performance during the warranty period.
Cummins OTEC600 Automatic Transfer Switch | 600A 480V 3-Phase | NEMA 3R Specifications |
|
|---|---|
| Model | OTEC600 |
| Manufacturer Part Number | A075F144 |
| Product Type | Automatic Transfer Switch |
| Manufacturer | Cummins |
| Rated Current | 600A |
| Rated Voltage | 480V |
| Phase | 3-Phase |
| Poles | 3-Pole |
| Transfer Operation | Open Transition |
| Controller | Cummins PowerCommand 40 |
| Display | LCD Display |
| Enclosure | NEMA 3R |
| Installation | Outdoor |
| Service Entrance Rated | No |
| Configurable Exerciser | Yes |
| Automatic Source Monitoring | Yes |
| Frequency | 50/60 Hz |
| Family Ratings | 40A–1200A |
| Maximum System Voltage | Up to 600 VAC |
| Available Configurations | 3- and 4-Pole (Family Options) |
| Certification | UL 1008 Listed Family |
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