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Welcome to the ASCO Website

Welcome to our website.

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Basic Automatic Transfer Switch Functions

Learn the tasks required to switch loads between two power sources.

Three Reasons to Choose UL 1088-Rated Transfer Switches

Understand the value of UL 1008 transfer switches in power availability.
engineers working in plant with tablet

UL 1008 Transfer Switch Withstand and Closing Ratings

This document describes the value of Withstand and Closing Ratings and how they are verified in transfer switches.
Engineer working on wires

ASCOFacts - What Determines How Much Power an Automatic Transfer Switch Can Withstand?

Read about design factors that play a role in a transfer switch’s withstandability in this 1974 document.

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