Automatic Transfer Switches
Automatic Transfer Switches transfer loads to an alternate power source such as generators without operator input.
Product Categories
Bypass Isolation Transfer Switches
Premium transfer switch technology enables bypass and isolation of the transfer mechanism for service without interrupting power to loads.
Manual Transfer Switches
Simple, cost-efficient switches for operator-initiated load transfer, with optional integrated quick connects.
Service Entrance Transfer Switches
Transfer switches with integrated utility service breakers require less space, streamline installation, and reduce overall installed cost.
Custom Transfer Switches
Custom designs provide full load switching capabilities and features such as integrated distribution breakers, bus riser compatibility, and power metering.
Featured Products
7000 SERIES Automatic Transfer Switch
Our most advanced solution for transferring all types of load in mission critical applications.
7000 SERIES Bypass Isolation Transfer Switch
Bypass and isolation capabilities enable transfer switch maintenance without disrupting power flow.
SERIES 300 Manual Transfer Switch with Integrated Quick Connects
A versatile solution for connecting portable and temporary power sources to distribution systems.
4000 SERIES Automatic Transfer Switch
Advanced transfer switch technology and premium performance in preconfigured models that ship quickly.
Featured Content
Digital Binder
View all our transfer switch brochures, data sheets, and technical documents in one place.
Transfer Switch Comparator
Compare features across ASCO's comprehensive range of generator transfer switches.
Find a Drawing
Download the latest drawings and wiring diagrams for our automatic and manual transfer switches.
Technical Briefs
UL Standards for Manual Transfer Switches
This Tech Brief compares UL 98 testing to the more rigorous UL 1008 testing requirements and explains how the more rugged standard is best-suited for increasing backup power availability and reliability of your generator transfer switch.
Basic Timing Delays for Load Transfer
Read our Tech Brief to learn about their important role in switching electrical loads between power sources.
When to Separately Ground a Backup Generator
Power distribution systems with a backup generator can be served by either a single grounding electrode for the entire system or a second electrode at the generator. The Tech Brief very simply describes when each configuration is necessary.
Solutions
Data Centers
Healthcare
Commercial Buildings
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