Automatic Transfer Switches

TruONE ATS
TruONE™ ATS - A critical breakthrough for critical power.

The all-new TruONE™ is the world’s first true purpose-built automatic transfer switch, engineered to incorporate switch and controller in one seamless unit.

ZTS Series - Business and Industrial Critical

ZTS Series - Standard (Open), Delayed or Closed Transition

Provides highly reliable and flexible source switching for essential healthcare equipment and business critical applications, including make-before break switching. 40-4000A...

ZBTS - Bypass/Isolation

Provides highly reliable and flexible source switching for essential healthcare equipment and business critical applications, including make-before break switching. 40-4000A...

ZTSMV - Medium Voltage 5-15kV Class

Provides highly reliable and flexible source switching for essential healthcare equipment and business critical applications, including make-before break switching. 40-4000A...

ZTG Series - General Purpose

ZTG Series - General Purpose Commercial and Industrial Applications

Powered by TruONE™ technology, Zenith ZTG Series ATS incorporate switch and controller in one seamless, self-contained unit.

ZTG Series - Standard (Open) or Delayed Transition

Rugged construction and flexible configurations for large commercial and industrial applications. Available from 40-3000A and 120-600V.

ZTG Series - Service Entranced Rated

Rugged construction and flexible configurations for large commercial and industrial applications. Available from 40-3000A and 120-600V.

ZTX Series - Small Frame

ZTX Series, powered by TruONE*

Easy and dependable for residential, commercial & light industrial standby power applications. Available from 30-1200A and 200-480V.

ZTE Series - Mission, Process, Healthcare Critical

ZTE Series - Standard (Open), Delayed or Closed transition

Specifically designed for large healthcare and mission-critical applications,with built-in metering,communications and advanced diagnostics. 40-4000A and 120-600V.

ZBTE - Bypass/Isolation

Specifically designed for large healthcare and mission-critical applications,with built-in metering,communications and advanced diagnostics. 40-4000A and 120-600V.

ZT30 Bypass - 30 Cycle - for Critical Applications

ZB30 Series - Bypass Isolation (Standard, Delayed or Closed Transition)

A UL tested 30-cycle short time rated Bypass/Isolation Transfer Switch that is utilized with Over Current Protective Devices (OCPD) to facilitate selective coordination.