MODEL: OTEC400 (SPEC B) - A066Y106 | 120/240V SINGLE-PHASE | NON-SERVICE RATED | NEMA3R ENCLOSURE
Cummins OTEC Series Automatic Transfer Switch, 400A @ 120/240V Single-Phase, NEMA3R
Expected Availability: Call
Product Overview
The Cummins OTEC Series Transfer Switch delivers reliable automatic power switching for your emergency standby power system. This 400-amp, single-phase (120/240V) transfer switch is designed for residential, commercial and light industrial applications, providing seamless transition between your primary power source and backup generator.
Built with Cummins' proven engineering, this transfer switch is suitable for emergency, legally required, and optional standby circuits. The OTEC series includes all essential features for monitoring power sources, initiating generator startup, and managing load transfer during power outages.
PowerCommand® 40 Control System
At the heart of this transfer switch is the advanced PowerCommand® 40-01 control—a sophisticated microprocessor-based system that makes operation simple and intuitive. The LCD digital display provides clear, real-time information, while the tactile soft-switches make navigation effortless. All settings and adjustments are software-enabled, ensuring precise configuration and easy setup.
Key Features
Service-Friendly Design – Maintenance and installation are straightforward thanks to plug-in connections, door-mounted controls, generous access space, and clearly marked terminals that technicians can identify at a glance.
Advanced Transfer Mechanism – The bi-directional linear motor actuator eliminates complex gears and linkages, delivering smooth, friction-free operation with consistent force and straight-line switching action for enhanced reliability.
Manual Override Capability – If needed, manual operating handles allow you to control the switch directly under de-energized conditions, with shielded termination and over-center contact mechanisms ensuring safe operation.
Safety Interlocking – Both mechanical and electrical interlocks prevent accidental connection between power sources, protecting your equipment and electrical system from potentially dangerous cross-connections.
Specifications
- Current Rating: 400 Amps
- Voltage: 120/240V Single-Phase
- Configuration: Non-Service Entrance Rated
- Enclosure: NEMA3R (weather-resistant for outdoor or indoor use)
- Dimensions: 59.0" H × 27.5" W × 16.5" D
- Weight: 285 lbs
Spec Sheet - OTEC Series Switches
Ideal Applications
This transfer switch is perfect for residential and commercial businesses on 120/240V single-phase power requiring dependable backup power, including commercial buildings, light industrial operations, and properties with critical electrical loads that cannot tolerate extended outages.