Cummins 125A Transfer Switch, OTEC Series, 120/208V 3-Phase, Non-Service Rated, NEMA3R Enclosure - OTEC transfer switches are designed for operation and switching of electrical loads between primary power and standby generator sets. They are suitable for use in emergency, legally required, and optional standby applications. The switches monitor both power sources, signal generator set startup, automatically transfer power, and return the load to the primary power source once a stable utility is available.
The fully integrated controller is designed for practical functionality, with LED indicators and digital pushbuttons for ease of operator use.
Features:
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Microprocessor Control - Easy-to-use, standard control. LEDs display transfer switch status; pushbuttons allow operator to activate control test, exercise timing, and transfer mode.
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Programmed transition - Open transition timing can be adjusted to completely disconnect the load from both sources for a programmed time period, as recommended by NEMA MG-1 for transfer of inductive loads.
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Advanced transfer switch mechanism - Unique bi-directional linear actuator provides virtually friction-free, constant force, straight-line transfer switch action during automatic operation.
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Manual operation - Manual operating handles, shielded termination, and over-center contact mechanisms allow effective manual operation under de-energized conditions.
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Positive Interlocking - Mechanical and electrical interlocking prevent source-to-source connection through the power or control wiring.
