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Cummins OTEC 225 Amp NSE 480V 3ph Automatic Transfer Switches - A075F137

Cummins OTEC 225 Amp NSE 480V 3ph Automatic Transfer Switches - A075F137

$3,652.70 USD
$ $3,652.70 USD
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In Stock

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truck
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Unlimited lifetime support, always available.

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What is your return policy?

Returns are free in the first 30 days with no restocking or processing fees, although the customer may be responsible for paying return shipping. See our complete return policy on our Shipping, Delivery, and Returns page linked in the footer of this website.

What’s covered by your return policy?

Our returns policy covers all purchases made through Portlandia Electric Supply. For warranty issues, as authorized distributors, we honor the full manufacturer warranty of ALL the brands on our website. See our complete returns and warranty policies on our Shipping, Deliver, and Returns page.

How long will it take to receive my order?

All orders are processed within 72 hours and you can expect delivery on most orders within 5-7 business days. You will receive access to our customer portal after ordering, where it is easy to track all your shipments. See our Shipping, Delivery and Returns page for more details.

What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer

You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

How does your Lifetime Customer Support work?

Our legendary lifetime customer support has helped make us the #1 online solar retailer! We have a dedicated team of solar professionals standing by to help you navigate the world of solar with ease. From selecting the perfect solar kit to installation and beyond, we provide support and expertise at every step of the journey.If you need help with ordering, shipping, troubleshooting, expanding your system, warranty issues, or anything else you have questions about for as long as you own your Portlandia Electric Supply equipment, we’ve got you covered: we’re always only a phone call or email away.

Cummins OTEC 225 Amp NSE 480V 3-Phase Automatic Transfer Switch

A075F137 | Open Transition | 225 Amp | 3-Phase | 480V System Voltage

225 Amp
Current Rating
480V
Voltage Rating
3-Phase
Phase Configuration

Product Overview

The Cummins OTEC 225 Amp NSE (Non-Service Entrance) 480V 3-phase Automatic Transfer Switch (ATS) is designed for commercial and industrial applications requiring reliable and efficient backup power. With a 225 Amp capacity, this ATS provides seamless automatic transfer between utility and generator power during outages, ensuring uninterrupted service for critical systems. The 480V 3-phase configuration allows for balanced energy distribution, making this switch ideal for high-demand, 3-phase installations. This robust unit features open transition technology to safely disconnect loads before reconnecting to a new power source. It is suitable for emergency, legally required, and optional standby applications. The integrated controller ensures practical functionality with LED indicators for real-time status monitoring. Digital pushbuttons allow operators to easily activate control tests and exercise timing. Maintenance is simplified through single-plug harness connections and field-programmable controls. No tools are required for door-mounted control adjustments. This switch monitors both power sources continuously to detect utility failures instantly. It signals generator startup automatically to prepare for power transfer. The system returns the load to primary power once stable utility voltage is confirmed. Heavy-duty silver alloy contacts ensure long-term durability without routine maintenance. Multi-leaf arc chutes effectively manage high-energy arcs during switching operations. Barriers separate phases to prevent dangerous interphase flashover incidents. A transparent cover allows visual inspection while blocking accidental contact. This transfer switch is UL 1008 certified for high endurance switching capability.

Key Benefits

High Current Capacity: The 225 Amp rating supports heavy industrial loads and large commercial facilities effectively.

Open Transition Safety: Break-before-make action completely disconnects loads to prevent source-to-source connections safely.

Microprocessor Control: Advanced microprocessor control ensures precise monitoring and automatic response to power fluctuations.

Easy Operator Interface: LED displays and digital pushbuttons simplify testing, timing adjustments, and manual operations.

Low Maintenance Design: Heavy-duty silver alloy contacts and arc chutes require no routine contact maintenance.

How It Works

The Cummins OTEC transfer switch continuously monitors both the primary utility power and the standby generator set. When the utility power fails or becomes unstable, the controller signals the generator to start immediately. Once the generator reaches a stable operating state, the switch automatically transfers the electrical load to the generator source. This ensures that critical systems remain powered without interruption during utility outages. The process is fully automated and managed by the integrated microprocessor controller. When the utility power returns and stabilizes, the system detects this change automatically. The controller then initiates the retransfer process to move the load back to the primary utility source. This return happens smoothly to prevent any sudden power disruptions for connected equipment. The entire cycle is designed for reliability and rapid response in emergency situations. Open transition timing can be adjusted to disconnect the load completely for a programmed period. This feature is recommended by NEMA MG-1 for safe transfer of inductive loads like motors. The switch incorporates both electrical and mechanical interlocks to prevent accidental source interconnection. These safety features ensure that power never flows between the two sources simultaneously.

Automatic Monitoring: The controller constantly checks voltage, frequency, and phase rotation of both power sources.

Generator Start Signal: Upon detecting utility failure, the switch sends an immediate signal to start the backup generator.

Load Transfer: The mechanism opens the utility connection and closes the generator connection to transfer the load.

Utility Return Detection: The system waits for stable utility power before initiating the return transfer to primary source.

Mechanical Interlocking: Physical and electrical locks prevent both sources from connecting at the same time accidentally.

Technical Specifications

Part Number A075F137
Model OTEC
Current Rating 225 Amps
Voltage Rating 480V AC 60 Hz
Phase Configuration 3-Phase
Transition Type Open Transition
Enclosure Type UL Type 1 Indoor
Operating Temperature -30°C to 60°C (-22°F to 140°F)
Storage Temperature -40°C to 60°C (-40°F to 140°F)
Total Transfer Time Max 6 cycles at 60 Hz
Control Voltage 120V AC
Certification UL 1008 Certified
Contact Material Heavy-Duty Silver Alloy
Actuator Type Bi-directional Linear Actuator
Pole Configuration 3-Pole with Neutral Bar

Certifications & Compliance

Certifications: UL 1008 Certified for high endurance switching capability
Inverter Compatibility: Compatible with standard standby generator sets and power systems
Environmental: Operating temperature -30°C to 60°C; Humidity max 95% non-condensing
Warranty: Comprehensive warranty backed by worldwide network of distributors with factory-trained service technicians

● Available | Contact PES to confirm freight, delivery timing, and compatibility before final order

Large generator, transfer switch, and warranty items may have extended lead times

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)

What is your return policy?

Returns are free in the first 30 days with no restocking or processing fees, although the customer may be responsible for paying return shipping. See our complete return policy on our Shipping, Delivery, and Returns page linked in the footer of this website.

What’s covered by your return policy?

Our returns policy covers all purchases made through Portlandia Electric Supply. For warranty issues, as authorized distributors, we honor the full manufacturer warranty of ALL the brands on our website. See our complete returns and warranty policies on our Shipping, Deliver, and Returns page.

How long will it take to receive my order?

All orders are processed within 72 hours and you can expect delivery on most orders within 5-7 business days. You will receive access to our customer portal after ordering, where it is easy to track all your shipments. See our Shipping, Delivery and Returns page for more details.

What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer

You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

How does your Lifetime Customer Support work?

Our legendary lifetime customer support has helped make us the #1 online solar retailer! We have a dedicated team of solar professionals standing by to help you navigate the world of solar with ease. From selecting the perfect solar kit to installation and beyond, we provide support and expertise at every step of the journey.If you need help with ordering, shipping, troubleshooting, expanding your system, warranty issues, or anything else you have questions about for as long as you own your Portlandia Electric Supply equipment, we’ve got you covered: we’re always only a phone call or email away.

Cummins OTEC 225 Amp NSE 480V 3-Phase Automatic Transfer Switch

A075F137 | Open Transition | 225 Amp | 3-Phase | 480V System Voltage

225 Amp
Current Rating
480V
Voltage Rating
3-Phase
Phase Configuration

Product Overview

The Cummins OTEC 225 Amp NSE (Non-Service Entrance) 480V 3-phase Automatic Transfer Switch (ATS) is designed for commercial and industrial applications requiring reliable and efficient backup power. With a 225 Amp capacity, this ATS provides seamless automatic transfer between utility and generator power during outages, ensuring uninterrupted service for critical systems. The 480V 3-phase configuration allows for balanced energy distribution, making this switch ideal for high-demand, 3-phase installations. This robust unit features open transition technology to safely disconnect loads before reconnecting to a new power source. It is suitable for emergency, legally required, and optional standby applications. The integrated controller ensures practical functionality with LED indicators for real-time status monitoring. Digital pushbuttons allow operators to easily activate control tests and exercise timing. Maintenance is simplified through single-plug harness connections and field-programmable controls. No tools are required for door-mounted control adjustments. This switch monitors both power sources continuously to detect utility failures instantly. It signals generator startup automatically to prepare for power transfer. The system returns the load to primary power once stable utility voltage is confirmed. Heavy-duty silver alloy contacts ensure long-term durability without routine maintenance. Multi-leaf arc chutes effectively manage high-energy arcs during switching operations. Barriers separate phases to prevent dangerous interphase flashover incidents. A transparent cover allows visual inspection while blocking accidental contact. This transfer switch is UL 1008 certified for high endurance switching capability.

Key Benefits

High Current Capacity: The 225 Amp rating supports heavy industrial loads and large commercial facilities effectively.

Open Transition Safety: Break-before-make action completely disconnects loads to prevent source-to-source connections safely.

Microprocessor Control: Advanced microprocessor control ensures precise monitoring and automatic response to power fluctuations.

Easy Operator Interface: LED displays and digital pushbuttons simplify testing, timing adjustments, and manual operations.

Low Maintenance Design: Heavy-duty silver alloy contacts and arc chutes require no routine contact maintenance.

How It Works

The Cummins OTEC transfer switch continuously monitors both the primary utility power and the standby generator set. When the utility power fails or becomes unstable, the controller signals the generator to start immediately. Once the generator reaches a stable operating state, the switch automatically transfers the electrical load to the generator source. This ensures that critical systems remain powered without interruption during utility outages. The process is fully automated and managed by the integrated microprocessor controller. When the utility power returns and stabilizes, the system detects this change automatically. The controller then initiates the retransfer process to move the load back to the primary utility source. This return happens smoothly to prevent any sudden power disruptions for connected equipment. The entire cycle is designed for reliability and rapid response in emergency situations. Open transition timing can be adjusted to disconnect the load completely for a programmed period. This feature is recommended by NEMA MG-1 for safe transfer of inductive loads like motors. The switch incorporates both electrical and mechanical interlocks to prevent accidental source interconnection. These safety features ensure that power never flows between the two sources simultaneously.

Automatic Monitoring: The controller constantly checks voltage, frequency, and phase rotation of both power sources.

Generator Start Signal: Upon detecting utility failure, the switch sends an immediate signal to start the backup generator.

Load Transfer: The mechanism opens the utility connection and closes the generator connection to transfer the load.

Utility Return Detection: The system waits for stable utility power before initiating the return transfer to primary source.

Mechanical Interlocking: Physical and electrical locks prevent both sources from connecting at the same time accidentally.

Technical Specifications

Part Number A075F137
Model OTEC
Current Rating 225 Amps
Voltage Rating 480V AC 60 Hz
Phase Configuration 3-Phase
Transition Type Open Transition
Enclosure Type UL Type 1 Indoor
Operating Temperature -30°C to 60°C (-22°F to 140°F)
Storage Temperature -40°C to 60°C (-40°F to 140°F)
Total Transfer Time Max 6 cycles at 60 Hz
Control Voltage 120V AC
Certification UL 1008 Certified
Contact Material Heavy-Duty Silver Alloy
Actuator Type Bi-directional Linear Actuator
Pole Configuration 3-Pole with Neutral Bar

Certifications & Compliance

Certifications: UL 1008 Certified for high endurance switching capability
Inverter Compatibility: Compatible with standard standby generator sets and power systems
Environmental: Operating temperature -30°C to 60°C; Humidity max 95% non-condensing
Warranty: Comprehensive warranty backed by worldwide network of distributors with factory-trained service technicians

● Available | Contact PES to confirm freight, delivery timing, and compatibility before final order

Large generator, transfer switch, and warranty items may have extended lead times
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Customer Success Stories

Troy P

EG4 off-grid base kit, Happy with my purchase.

This is the first stage of my three planned purches. I got the eg4 inverter 6000 XP base kit with six 400 watt panels and the two server rack batteries. Did a little online research and followed the instructions and it got set up without any issues. Right now I'm just running it in my garage on a single outlet and have been running dual 750 watt water distillers with it. Once I get the second inverter and a bunch more panels and batteries, I plan on attaching it to my subpanel in my house that has my lights and outlets and appliances on it. Then I'll get a soft start for my AC and blower and run it on my main panel.

Jacob B

Easy Process, Genuine Support

Trying to pick the correct solar system for your needs can be very technical and frustrating. I wanted to thank Yvhan and the Portlandia Electric supply team for their patience and helpful attitudes through multiple calls. I feel like we were able to narrow it down to what worked for me and my family. My system works great and I couldn't be happier to have picked Portlandia Electric Supply.

Patrick B

Off Grid Solar Purchase

I wanted to get an offgrid solar system for years but didn’t know where to start. I found Portlandia Electric Supply on Facebook and decided to submit a quote. Within 24 hours I had a custom proposal that was almost half the price of the companies I had previously got quotes from. My wife and I decided to order online and the kit came in a timely manner and it was an easy install. Great company to work with!

James Martin

Highly Recommend

I would like to take the time to express the outstanding service that I was provided with by Portlandia Electric Supply. They provided me with all the answers to my questions, and after reviewing our quote over the phone I felt comfortable proceeding to order my kit. It’s exactly what I needed and they were there to help us over the phone when we had questions installing it. I highly recommend others in need to choose Portlandia Electric Supply.

Brian H

Solar Kit for Mobile Work Van

As a professional videographer, I needed reliable power on the go.Portlandia Electric Supply Delta Pro and roof-mounted panels were the perfect solution. Setup was easy, and the kit included everything needed. The Delta Pro powers my cameras, lights, laptop, and a small fridge with impressive battery capacity.

Keith S

Best Tech Support

You folks have been wonderful guiding me through the ins and outs of going solar. Plus your tech guys Rod and Nelson are the absolute best. They explained all the different aspects of inverters, batteries and how to keep them in top condition. Too much more to put here… but no other company has the 100% tech support you provide for your customers!

Coll A

Great Experience

My experience with Portlandia Electric Supply has been excellent. Before the sales, they answered all my questions to assure that I got what I needed. After the sales they continued to support me with answers and help. I had a warranty issue with a unit, and it was handled as well as possible. I would recommend them to anyone looking to go solar.

Troy P

EG4 off-grid base kit, Happy with my purchase.

This is the first stage of my three planned purches. I got the eg4 inverter 6000 XP base kit with six 400 watt panels and the two server rack batteries. Did a little online research and followed the instructions and it got set up without any issues. Right now I'm just running it in my garage on a single outlet and have been running dual 750 watt water distillers with it. Once I get the second inverter and a bunch more panels and batteries, I plan on attaching it to my subpanel in my house that has my lights and outlets and appliances on it. Then I'll get a soft start for my AC and blower and run it on my main panel.

Jacob B

Easy Process, Genuine Support

Trying to pick the correct solar system for your needs can be very technical and frustrating. I wanted to thank Yvhan and the Portlandia Electric supply team for their patience and helpful attitudes through multiple calls. I feel like we were able to narrow it down to what worked for me and my family. My system works great and I couldn't be happier to have picked Portlandia Electric Supply.

Patrick B

Off Grid Solar Purchase

I wanted to get an offgrid solar system for years but didn’t know where to start. I found Portlandia Electric Supply on Facebook and decided to submit a quote. Within 24 hours I had a custom proposal that was almost half the price of the companies I had previously got quotes from. My wife and I decided to order online and the kit came in a timely manner and it was an easy install. Great company to work with!

James Martin

Highly Recommend

I would like to take the time to express the outstanding service that I was provided with by Portlandia Electric Supply. They provided me with all the answers to my questions, and after reviewing our quote over the phone I felt comfortable proceeding to order my kit. It’s exactly what I needed and they were there to help us over the phone when we had questions installing it. I highly recommend others in need to choose Portlandia Electric Supply.

Brian H

Solar Kit for Mobile Work Van

As a professional videographer, I needed reliable power on the go.Portlandia Electric Supply Delta Pro and roof-mounted panels were the perfect solution. Setup was easy, and the kit included everything needed. The Delta Pro powers my cameras, lights, laptop, and a small fridge with impressive battery capacity.

Keith S

Best Tech Support

You folks have been wonderful guiding me through the ins and outs of going solar. Plus your tech guys Rod and Nelson are the absolute best. They explained all the different aspects of inverters, batteries and how to keep them in top condition. Too much more to put here… but no other company has the 100% tech support you provide for your customers!

Coll A

Great Experience

My experience with Portlandia Electric Supply has been excellent. Before the sales, they answered all my questions to assure that I got what I needed. After the sales they continued to support me with answers and help. I had a warranty issue with a unit, and it was handled as well as possible. I would recommend them to anyone looking to go solar.

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Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

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