Cummins OTEC 400 Amp NSE 480V 3ph Automatic Transfer Switches - A075F129 | Portlandia Electric Supply
Cummins OTEC 400 Amp NSE 480V 3ph Automatic Transfer Switches - A075F129 | Portlandia Electric Supply
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Cummins OTEC 400 Amp NSE 480V 3ph Automatic Transfer Switches - A075F129

Cummins OTEC 400 Amp NSE 480V 3ph Automatic Transfer Switches - A075F129

$4,891.83 USD
$ $4,891.83 USD
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9+ sold

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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 A075F129 400 Amp 480V 3-Phase Automatic Transfer Switch

A075F129 | Open Transition | 400 Amp | 3-Phase | 480V System Voltage

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

Product Overview

The Cummins OTEC A075F129 is a high-performance automatic transfer switch designed for critical power management. It operates within a 40 to 1200 amp range, with this specific unit rated at 400 amps. The device monitors both utility and generator power sources continuously. It automatically signals generator startup when utility power fails. Power transfer occurs seamlessly to ensure uninterrupted operations for your facility. The switch returns the load to primary utility power once stability is restored. Its fully integrated controller features LED indicators for clear status monitoring. Digital pushbuttons allow operators to easily activate test or exercise modes. This design ensures practical functionality for emergency and standby applications. The open transition mechanism prevents dangerous source-to-source connections effectively. Heavy-duty contacts handle motor loads and total system transfers without routine maintenance. Service access is simplified through single-plug harness connections and clear terminal markings. Door-mounted controls are field-programmable without requiring special tools. This unit represents a reliable choice for industrial backup power systems.

Key Benefits

Microprocessor Control: Standard control features include an easy-to-use interface with LED displays for status monitoring.

Open Transition Safety: Programmed timing completely disconnects the load from both sources to protect inductive loads.

Frictionless Mechanism: A unique bi-directional linear actuator provides constant force and straight-line transfer action.

Positive Interlocking: Mechanical and electrical interlocks prevent source-to-source connections through wiring.

Easy Service Access: Single-plug harness connections and ample access space simplify servicing and maintenance tasks.

How It Works

The automatic transfer switch continuously monitors voltage levels from both primary utility and standby generator sources. When utility power is interrupted, the controller detects the failure and signals the generator set to start immediately. Once the generator reaches stable operating parameters, the switch transfers the electrical load to the generator set. This process ensures that critical equipment remains powered without interruption during utility outages. The system remains on generator power until the utility source returns to a stable condition. Upon detecting stable utility power, the switch automatically retransfers the load back to the primary source. The generator then runs through a cool-down period before shutting down automatically. This entire cycle operates without manual intervention to ensure maximum reliability for your facility.

Automatic Monitoring: The switches monitor both power sources constantly to detect any voltage fluctuations or failures. This real-time monitoring ensures immediate response to power disturbances without delay.

Break-Before-Make Action: Independent break-before-make action is used for both 3-pole and 4-pole switches. This design allows sync check operation when required for proper load transfer.

Manual Operation Capability: Manual operating handles allow effective operation under deenergized conditions if needed. Shielded termination and over-center contact mechanisms enhance safety during manual use.

Technical Specifications

Part Number A075F129
Model Series OTEC
Current Rating 400 Amps
Voltage Rating 480V
Phase Configuration 3-Phase
Transition Type Open Transition
Amp Range Capability 40 – 1200 Amps
Control Type Microprocessor with LED Display
Contact Material Heavy-duty Silver Alloy
Actuator Mechanism Bi-directional Linear Actuator
Continuous Load Limit 100% of Switch Rating
Tungsten Load Limit 30% of Switch Rating

Certifications & Compliance

Certifications: NEMA MG-1 Compliant for inductive load transfer
Inverter Compatibility: Suitable for emergency, legally required, and optional standby applications
Environmental: Designed for practical functionality with field-programmable controls
Warranty: Comprehensive warranty backed by a worldwide network of distributors with factory-trained service technicians

Documentation

Product Datasheet (PDF)

● Available | Contact PES for lead time, freight, and compatibility confirmation before final order

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 A075F129 400 Amp 480V 3-Phase Automatic Transfer Switch

A075F129 | Open Transition | 400 Amp | 3-Phase | 480V System Voltage

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

Product Overview

The Cummins OTEC A075F129 is a high-performance automatic transfer switch designed for critical power management. It operates within a 40 to 1200 amp range, with this specific unit rated at 400 amps. The device monitors both utility and generator power sources continuously. It automatically signals generator startup when utility power fails. Power transfer occurs seamlessly to ensure uninterrupted operations for your facility. The switch returns the load to primary utility power once stability is restored. Its fully integrated controller features LED indicators for clear status monitoring. Digital pushbuttons allow operators to easily activate test or exercise modes. This design ensures practical functionality for emergency and standby applications. The open transition mechanism prevents dangerous source-to-source connections effectively. Heavy-duty contacts handle motor loads and total system transfers without routine maintenance. Service access is simplified through single-plug harness connections and clear terminal markings. Door-mounted controls are field-programmable without requiring special tools. This unit represents a reliable choice for industrial backup power systems.

Key Benefits

Microprocessor Control: Standard control features include an easy-to-use interface with LED displays for status monitoring.

Open Transition Safety: Programmed timing completely disconnects the load from both sources to protect inductive loads.

Frictionless Mechanism: A unique bi-directional linear actuator provides constant force and straight-line transfer action.

Positive Interlocking: Mechanical and electrical interlocks prevent source-to-source connections through wiring.

Easy Service Access: Single-plug harness connections and ample access space simplify servicing and maintenance tasks.

How It Works

The automatic transfer switch continuously monitors voltage levels from both primary utility and standby generator sources. When utility power is interrupted, the controller detects the failure and signals the generator set to start immediately. Once the generator reaches stable operating parameters, the switch transfers the electrical load to the generator set. This process ensures that critical equipment remains powered without interruption during utility outages. The system remains on generator power until the utility source returns to a stable condition. Upon detecting stable utility power, the switch automatically retransfers the load back to the primary source. The generator then runs through a cool-down period before shutting down automatically. This entire cycle operates without manual intervention to ensure maximum reliability for your facility.

Automatic Monitoring: The switches monitor both power sources constantly to detect any voltage fluctuations or failures. This real-time monitoring ensures immediate response to power disturbances without delay.

Break-Before-Make Action: Independent break-before-make action is used for both 3-pole and 4-pole switches. This design allows sync check operation when required for proper load transfer.

Manual Operation Capability: Manual operating handles allow effective operation under deenergized conditions if needed. Shielded termination and over-center contact mechanisms enhance safety during manual use.

Technical Specifications

Part Number A075F129
Model Series OTEC
Current Rating 400 Amps
Voltage Rating 480V
Phase Configuration 3-Phase
Transition Type Open Transition
Amp Range Capability 40 – 1200 Amps
Control Type Microprocessor with LED Display
Contact Material Heavy-duty Silver Alloy
Actuator Mechanism Bi-directional Linear Actuator
Continuous Load Limit 100% of Switch Rating
Tungsten Load Limit 30% of Switch Rating

Certifications & Compliance

Certifications: NEMA MG-1 Compliant for inductive load transfer
Inverter Compatibility: Suitable for emergency, legally required, and optional standby applications
Environmental: Designed for practical functionality with field-programmable controls
Warranty: Comprehensive warranty backed by a worldwide network of distributors with factory-trained service technicians

Documentation

Product Datasheet (PDF)

● Available | Contact PES for lead time, freight, and compatibility confirmation before final order
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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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