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Welcome to the ASCO Website

Welcome to our website.

1925

Industry's first Automatic Transfer Switch

1938

First ATS with mechanically held contacts

1940

The Industrial Trust Building in Providence, Rhode Island, first facility to install ATSs

1967

First Power Control System

1977

Introduced the first Closed Transition Transfer Switch

1980

First Bypass Isolation Transfer Switch

1985

Users gain a visual interface for monitoring and controlling the connection operation, and shedding of generators and loads from switchgear.

2011

First Critical Power Management System

2024

ASCO Power SourcePacT™ Interconnect Source Isolation Switch
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Industry's First

Automatic Transfer Switch, Closed Transition Transfer Switch, UL 1008 short time rated transfer switches, UL 3008 Listed Source Isolation Switch
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117

US patents that drive purpose-built agency-listed solutions for the industry’s toughest power resilience challenges.
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1200

Engineers, fabricators, technicians, and professionals dedicated solely to backup and emergency power solutions.

The Global Leader in Critical Power Reliability

Learn why ASCO is a leading choice in diverse international markets.
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Solving today’s greatest power management challenges with future-ready innovations.

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Read Product Overview

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Browse Transfer Switches

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Hospitals

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Data centers

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Water Utilities

Government Complexes

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Commercial Buildings

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Military Applications

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Small Businesses

Learn more about ASCO Power transfer switches in action for every application.

ASCO Power Support

Reliable. Dependable. Unparalleled around-the-clock, 365 days a year.

• 24/7 Emergency Support
• Technical Support via Phone and Email
• Remote Troubleshooting
• Equipment maintenance and repair
• Retrofits and Upgrades

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Contact our support team for technical assistance and information.

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