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A075F130 | Open Transition | 400 Amps | NEMA 3R | 208V System Voltage
The Cummins automatic transfer switch A075F130 ensures reliable power continuity for critical electrical loads. This OTEC model operates as an open transition switch between primary utility power and standby generator sets. It is designed for emergency, legally required, and optional standby applications. The unit features a fully integrated microprocessor controller for practical functionality. LED indicators and digital pushbuttons simplify operator use and status monitoring. Heavy-duty silver alloy contacts handle motor loads without routine maintenance. The switch monitors both power sources to signal generator startup automatically. It transfers power instantly when utility fails and returns load once stable utility is available. Large generator items like this switch often have extended lead times. Customers must confirm voltage, amperage, enclosure, freight, and lead time with PES before ordering. This ensures perfect compatibility with your specific backup power system requirements. The NEMA 3R enclosure provides protection against rain and sleet for outdoor installation.
Microprocessor Control: Standard control features an easy-to-use interface with LED status displays and pushbuttons for tests and exercise timing.
Open Transition Safety: Programmed transition completely disconnects the load from both sources to meet NEMA MG-1 recommendations for inductive loads.
Frictionless Mechanism: A unique bi-directional linear actuator provides constant force and straight-line action during automatic operation without friction.
Manual Operation Ready: Shielded termination and over-center contact mechanisms allow effective manual operation under deenergized conditions when needed.
Positive Interlocking: Mechanical and electrical interlocks prevent source-to-source connection through power or control wiring to ensure safety.
The Cummins OTEC transfer switch continuously monitors both utility power and generator set status. When utility power is interrupted, the controller signals the generator set to start immediately. The switch then automatically transfers the electrical load to the standby generator source. This process ensures that critical equipment remains powered during utility failures without interruption. Once a stable utility source is detected again, the system returns the load to the primary power source. The fully integrated controller manages these transitions with precise timing and safety interlocks. This break-before-make action prevents any momentary connection between the two power sources. The system is designed for reliable operation in emergency and legally required standby applications.
Automatic Power Transfer: The switch monitors both power sources and signals generator startup automatically when utility fails. It transfers power to the generator and returns load to utility once stable power is available.
Programmed Transition Timing: Open transition timing can be adjusted to completely disconnect the load from both sources for a set period. This meets NEMA MG-1 recommendations for safely transferring inductive loads like motors.
Break-Before-Make Action: Independent break-before-make action is used for both 3-pole and 4-pole switches with switched neutral. This design allows sync check operation when required for proper motor and rectifier load transfer.
| Part Number | A075F130 |
| Model | OTEC |
| Current Rating | 400 Amps |
| Voltage Rating | 208V (120/208V) |
| Phase Type | 3-Phase |
| Transition Type | Open Transition |
| Enclosure Type | NEMA 3R |
| Height | 59.0 inches |
| Width | 27.5 inches |
| Depth | 16.5 inches |
| Weight | 425 lbs |
| Max Voltage Rating | 600 VAC |
| Frequency | 50 or 60 Hz |
| Continuous Load Limit | 100% of switch rating |
| Tungsten Load Limit | 30% of switch rating |
Certifications: NEMA MG-1 Compliant, NEMA 3R Enclosure Rated
Inverter Compatibility: Suitable for emergency, legally required, and optional standby mode applications
Environmental: Protected against rain and sleet for outdoor installation
Warranty: Comprehensive warranty backed by a worldwide network of distributors with factory-trained service technicians
● Available | Contact us for lead time and pricing
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