The Zenith ZT30 is a UL tested 30-cycle short time rated Automatic Transfer Switch that is utilized with Over Current Protective Devices (OCPD) to facilitate selective coordination. The ZT30's industry leading short time rating and best-in-class footprint greatly simplifies the selective coordination design process and provides the utmost in system design flexibility for future system growth. The ZT30 supplies 100% rated power to loads after an overcurrent event, helping to maximizing power distribution system reliability and uptime.
The ZT30 is available in standard, delayed and closed transition modes as well as in bypass-isolation.
ZT3ST - Standard (Open) Transition
The Zenith ZT3ST transfer switch is used in general and mixed load applications.
ZT3DT - Delayed Transition
The Zenith ZT3DT transfer switch has an adjustable time delay in the centered "off" position. This delay allows motor loads to coast down and transformer field to decay; ensuring inductive loads are re-energized after transfer with only normal inrush starting currents.
ZT3CT - Closed Transition
The Zenith ZT3CT transfer switch is used in critical/life safety applications where a "no break" transfer is desired during periodic testing and maintenance.