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Cummins OTEC125 277/480V 3 Phase NEMA 3R Transfer Switch
Product Description
Cummins OTEC125 125 Amp 277/480V 3 Phase NEMA 3R Transfer Switch - A075F126
MODEL: OTEC125 - A075F126 | 277/480V 3-Phase | NON-SERVICE RATED | NEMA 3R ENCLOSURE
Cummins OTEC125A - Commercial-Grade Power Protection with Advanced Control Technology
Why Choose the Cummins OTEC125A?
The Cummins OTEC125A represents the latest evolution in automatic transfer switch technology. Engineered for commercial and light industrial facilities, this 125-amp transfer switch delivers reliable emergency power switching when you need it most. Featuring the advanced PowerCommand® 40-11 control system, it provides intelligent power management in a rugged NEMA 3R outdoor-rated enclosure.
Perfect for: Emergency systems, legally required standby circuits, and optional standby applications in commercial buildings, light industrial facilities, and critical infrastructure.
Advanced PowerCommand® 40-11 Control
The brain of your backup power system. This microprocessor-based control features:
- Intuitive LCD Display - Clear digital readout with easy-to-read system status
- Tactile Soft-Switch Interface - Navigate menus and adjust settings with precision
- Software-Enabled Configuration - All features, settings, and adjustments are digitally programmed for accuracy and repeatability
- Comprehensive Monitoring - Real-time tracking of both utility and generator power sources
Built for Reliability and Easy Maintenance
Friction-Free Linear Motor Actuator
Unlike traditional transfer switches with complex gears and linkages, the OTEC125A uses a bi-directional linear motor actuator that delivers smooth, consistent switching action with minimal wear.
Service-Friendly Design
- Plug-style connections for quick installation
- Door-mounted controls for easy access
- Clearly marked terminals reduce installation time
- Generous interior space simplifies maintenance
Safe Manual Override
When manual operation is required, the shielded manual operating handles and over-center contact mechanism allow safe switching under de-energized conditions.
Dual Interlocking Protection
Both mechanical and electrical interlocks prevent dangerous source-to-source connections, protecting your equipment and ensuring code compliance.
Technical Specifications
- Voltage: 277/480V, 3-Phase
- Current Rating: 125 Amperes
- Enclosure: NEMA3R (outdoor rated, weather-resistant)
- Service Rating: Non-Service Rated
- Control: PowerCommand® 40-11microprocessor
- Series: OTEC Spec C (Latest Generation)
- Dimensions: 34" H × 26.5" W × 12.5" D
- Weight: 229 lbs
Applications
- Commercial buildings and offices
- Light industrial facilities
- Healthcare clinics
- Retail locations
- Data centers and IT facilities
- Municipal buildings
Codes and Standards
- UL - UL 1008 Listed with UL 50E Type Cabinets and UL Listed CU-AL terminals.
- NEMA - Compliance with NEMA ICS 10.
- CSA - Certified to CSA 22.2.
- IEEE - Compliance with IEEE 446 for Emergency and Standby Power Applications.
- NFPA - Compliance with NFPA 70, 99, and 110 (Level 1).
- NEC - Suitable for use in Emergency, Legally Required Standby and Critical Power Systems per NEC 700, 701, 702, and 708.
- EMC - Meets Electromagnetic Compatibility (EMC) standards for Generic Immunity and Emissions Standards for Industrial environment.
