ASCO Power Technologies provides industry-leading products and solutions for reliably transferring critical loads to emergency power sources. Since introducing the first power transfer switch almost 100 years ago, ASCO has been committed to providing reliable and innovative technology, superior support and dedicated field service. The SERIES 300 Paralleling System, available from 208 to 600 volts, is the first patented transfer switch-based paralleling system. Tested and listed per UL 891, it combines robust UL listed components in a resourceful design that brings added flexibility, reliability, and cost savings to any project. Using ASCO products can mean the difference between a minor inconvenience and a major catastrophe. You’ll find ASCO Power Transfer Switches wherever there is a critical load to protect.