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Welcome to our website.

Developed from more than a century of backup power experience.

Transfer switches are installed in a building’s power distribution system between electrical loads and power sources such as generators. They transfer electrical load between power sources to help assure power availability when one source becomes unavailable.
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ASCO automatic transfer switch

Automatic Transfer Switches

Transfer loads to an alternate power source without operator input when outages occur.
ASCO manual transfer switch

Manual Transfer Switches

Cost-efficient solutions for operator-initiated load transfer.
ASCO bypass isolation transfer switch

Bypass-Isolation Transfer Switches

Enable transfer switch service without interrupting power to loads.
ASCO service entrance transfer switch

Service Entrance Transfer Switches

Service entrance transfer switches integrate a utility service breaker to save space and streamline installation.
ASCO custom transfer switch

Custom Transfer Switches

Optimize transfer switches by providing bus riser, source fuses, power meters, and other features for any application.

Rigorously Tested. Reliable. Rugged.

Withstand severe conditions
ASCO Transfer Switches are tested to UL 1008 or IEC 60497 standards to verify that they can provide the highest levels of reliability and power availability.

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Solve two problems with one solution
Service entrance models save space requirements and streamline installation

Get exactly what you need
Custom-engineered solutions add functionality and value

Meet application requirements
Low-voltage and medium-voltage models up to 4000 Amps

Creators of the first commercially available automatic transfer switch

ASCO automatic generator transfer switches

Solutions for earthquake prone areas

Verify equipment capability to withstand seismic events. Seismic-rated transfer switches are labeled for proper specification and inspection.
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ASCO Webinar TS Fundamentals

Transfer Switch Self Help Hub

From product overviews to troubleshooting — the self-help hub directs you to resources and services quickly.
Working professionals

Find a technical document

Download generator transfer switch specifications, outline drawings, and wiring diagrams.
ASCO interactive transfer switch

Take a closer look

See our industry-leading transfer switches for generators and other power sources in 3D. ASCO’s interactive tool lets viewers zoom in on product details and learn their value.
ASCO features comparison

Compare available features

Compare features across ASCO Power’s comprehensive range of transfer switches.

See every model

View our entire range of transfer switch brochures, data sheets, and technical documents in one place.
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Data Centers

Experience power reliability while maximizing uptime.
Commercial building

Commercial Buildings

Drive business continuity with a flexible and scalable backup power system.
Healthcare facilities solutions


Find robust backup power solutions that help protect people, improve patient satisfaction, and streamline compliance.
Telecom solutions


Improve uptime for communication services.

“With nine hospitals on the line, ASCO Power helps me sleep well at night.”

 - Tom M. 

Facility Engineering Director

Children learning

Helping children thrive and learn

A children’s home in Puerto Rico lost power for months after Hurricane Maria. ASCO Power Technologies worked with Engineers Without Borders to provide reliable and sustainable power by installing a microgrid.

Wastewater treatment plant solutions

Rugged Solutions for Tough Conditions

Glasgow, Montana is a 4 ½ hour drive from the nearest metro area. ASCO Power supplied a rugged transfer switch solution to improve power reliability and resilience for Glasgow’s wastewater treatment plant.

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Transfer Switch 101 and Beyond

Register for upcoming and on-demand webinars from ASCO Power Technologies. The sessions are led by industry experts presenting market-leading technologies and their value in solving critical power challenges.
Register Today

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