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Cummins OTEC 400 Amp NSE 240V 1ph Automatic Transfer Switches - A075F133

Cummins OTEC 400 Amp NSE 240V 1ph Automatic Transfer Switches - A075F133 | Portlandia Electric Supply

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SKU PES-PA-ELC-1486

Cummins OTEC 400 Amp NSE 240V 1ph Automatic Transfer Switches - A075F133

$4,891.83 USD

$ $4,891.83 USD

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In Stock

Get yours today!

9+ sold

In the last 7 days

Flat Rate Shipping - Calculated at Checkout

Delivery timeframe shown above at checkout

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Unlimited lifetime support, always available.

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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.

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Cummins OTEC A075F133 400A 240V 1-Phase Automatic Transfer Switch

A075F133 | OTEC Technology | Open/Delayed Transition | Single-Phase | 600VAC System Voltage

400A

Current Rating

240V

Operating Voltage

1Ph

Single Phase

Product Overview

The Cummins automatic transfer switch A075F133 delivers critical power protection for commercial and industrial standby applications. This OTEC model manages electrical loads between utility mains and backup generators with high precision. Its 400-amp capacity supports heavy-duty equipment needs while maintaining stable 240V single-phase operation. The unit features open or delayed transition logic to prevent power surges during switching events. Engineers trust this switch for reliable monitoring of both power sources and automatic generator start signaling. It ensures continuous operation by transferring loads instantly when utility power fails. The robust enclosure protects internal components from environmental stress and electrical noise. This transfer switch is essential for facilities requiring uninterrupted power during grid failures. PES confirms all freight, delivery timing, and compatibility details before final order fulfillment.

Key Benefits

High Current Capacity: The 400-amp rating supports demanding industrial loads and large commercial equipment without voltage drop.

Automatic Source Monitoring: The unit continuously monitors utility and generator power to detect interruptions instantly.

Seamless Load Transfer: Electrical loads switch automatically to the generator when utility power is interrupted.

Generator Start Signal: The switch signals the generator to start immediately upon detecting a power failure.

Safe Retransfer Logic: Loads return to utility power automatically once a stable grid connection is restored.

How It Works

This automatic transfer switch operates by constantly evaluating the status of two distinct power sources. It maintains readiness to switch loads based on real-time voltage and frequency data. The control logic ensures smooth transitions that protect sensitive electronic equipment from damage. Open or delayed transition modes prevent dangerous power surges during the switching process. This system is vital for maintaining operations in critical infrastructure during grid instability.

Power Failure Detection: The unit detects when utility power is interrupted or becomes unstable. It immediately triggers the backup generator start sequence.

Automatic Load Switching: Once the generator reaches stable output, the switch transfers the electrical load. This ensures continuous power delivery to connected equipment.

Utility Power Restoration: When utility power returns and stabilizes, the switch retransfers the load back. The generator then shuts down after a cooling period.

Technical Specifications

Part Number	A075F133
Model Series	OTEC
Current Rating	400 Amps
Voltage Rating	240V
Phase Configuration	1 Phase (Single Phase)
Maximum Voltage Rating	600VAC
Frequency Rating	50 or 60 Hz
Transition Type	Open or Delayed
Application Type	Standby Power
Current Range Capability	40A to 1200A

Certifications & Compliance

Certifications: Genuine Cummins OEM component covered under standard accessory warranty
Standards: Certified to UL 1008 standards for automatic transfer switches
Environmental: Enclosed design for protection against dust and moisture
Integration:Approved for integration with Cummins OTEC-series generators and power management systems

Documentation

Product Datasheet (PDF)

● Available | Contact us for lead time and pricing

What is your return policy?

What’s covered by your return policy?

How long will it take to receive my order?

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?

Cummins OTEC A075F133 400A 240V 1-Phase Automatic Transfer Switch

A075F133 | OTEC Technology | Open/Delayed Transition | Single-Phase | 600VAC System Voltage

400A

Current Rating

240V

Operating Voltage

1Ph

Single Phase

Product Overview

Key Benefits

High Current Capacity: The 400-amp rating supports demanding industrial loads and large commercial equipment without voltage drop.

Automatic Source Monitoring: The unit continuously monitors utility and generator power to detect interruptions instantly.

Seamless Load Transfer: Electrical loads switch automatically to the generator when utility power is interrupted.

Generator Start Signal: The switch signals the generator to start immediately upon detecting a power failure.

Safe Retransfer Logic: Loads return to utility power automatically once a stable grid connection is restored.

How It Works

Power Failure Detection: The unit detects when utility power is interrupted or becomes unstable. It immediately triggers the backup generator start sequence.

Automatic Load Switching: Once the generator reaches stable output, the switch transfers the electrical load. This ensures continuous power delivery to connected equipment.

Utility Power Restoration: When utility power returns and stabilizes, the switch retransfers the load back. The generator then shuts down after a cooling period.

Technical Specifications

Part Number	A075F133
Model Series	OTEC
Current Rating	400 Amps
Voltage Rating	240V
Phase Configuration	1 Phase (Single Phase)
Maximum Voltage Rating	600VAC
Frequency Rating	50 or 60 Hz
Transition Type	Open or Delayed
Application Type	Standby Power
Current Range Capability	40A to 1200A

Certifications & Compliance

Documentation

Product Datasheet (PDF)

● Available | Contact us for lead time and pricing

FAQs

Got a question? We are here to answer

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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!

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Highly Recommend

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