Get yours today!
In the last 7 days
Delivery timeframe shown above at checkout
Unlimited lifetime support, always available.

A075F135 | Microprocessor Control | Open Transition | Non-Service Entrance | 208V System Voltage
The Cummins OTEC 225 Amp NSE 208V 3-phase Automatic Transfer Switch (ATS) delivers reliable power for medium commercial sites. This unit ensures seamless transitions between utility and backup generator power during critical outages. Its 225 Amp capacity supports larger industrial systems requiring high power stability. The 208V 3-phase setup enables balanced energy distribution across complex loads. The Non-Service Entrance rating allows flexible installation where service entrance capability is unnecessary. This design simplifies integration into existing electrical infrastructures without major upgrades.
High Capacity Handling: The 225 Amp rating supports larger commercial and industrial power systems effectively.
Stable Power Distribution: The 208V 3-phase system ensures efficient and stable energy flow for critical loads.
Flexible Installation: The NSE rating allows installation in locations without service entrance equipment requirements.
Automatic Transfer Logic: Switches automatically to backup power during utility outages to prevent downtime.
Compact Integration: The compact design integrates easily with Cummins backup generators for seamless operation.
This automatic transfer switch constantly monitors both utility and generator power sources. When a utility outage occurs, the controller signals the generator to start immediately. The system then disconnects the load from the utility source safely. After a programmed delay, it connects the load to the generator power source. This break-before-make action prevents dangerous source-to-source connections. Once utility power stabilizes, the switch returns the load to normal utility power automatically.
Power Source Monitoring: The microprocessor controller continuously senses voltage levels on both utility and generator inputs. It detects phase rotation and voltage imbalances instantly to ensure safe operation.
Programmed Transition: Open transition timing can be adjusted to disconnect the load completely from both sources. This pause is crucial for protecting large inductive loads from damage during switching.
Mechanical Interlocking: Mechanical and electrical interlocks prevent simultaneous closing of normal and emergency contacts. This positive interlocking ensures absolute safety against source-to-source short circuits.
| MPN | A075F135 |
| Vendor | Cummins |
| Amperage | 225 Amps |
| Voltage | 120/208V |
| Phase Type | Three-Phase, 60 Hz |
| Enclosure Rating | NEMA 3R (Outdoor) |
| Service Entrance Rated | No (Non-Service Entrance) |
| Poles | 3-Pole |
| Control System | PowerCommand 40-11 Microprocessor |
| Display Type | Backlit LCD Display |
| Transition Mode | Open Transition (Break-Before-Make) |
| Contact Rating | 100% Load Interruption |
| Dimensions | 35.5" H x 26" W x 16" D |
| Weight | 225 lbs |
| Application Type | Commercial & Industrial |
Certifications: UL 1008 Listed for safety and operational reliability
Inverter Compatibility: Compatible with Cummins backup generators and commercial standby systems
Environmental: NEMA 3R rated for indoor or outdoor installation protection
Warranty: 1-Year Cummins Limited Warranty for long-term support
● Available | Contact us for lead time and pricing
From hurricanes to blackouts, reliable solar power ensures you're able to keep your home & family safe no matter what comes your way.
Making one-click solar solutions simple since 2018. Whether you’re powering a cabin, charging devices, or backing up your home.
Say goodbye to reliance on the energy companies. Enjoy the same freedom that 50,000+ customers have with their own solar power system.
$150 Value - Free Offer (Limited Time Only!) No Strings Attached. Totally Free. Takes Less than 2 Minutes.