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Automatic Transfer Switches
ZTG Series - Standard (Open) or Delayed Transition
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ZTG Series - Standard (Open) or Delayed Transition

The Zenith ZTG Series of transfer switches are built for general purpose commercial and industrial applications requiring the dependability and ease of operation found in a power contactor switch. The ZTG series uses the MX150 microprocessor control system, which includes features specified on a general purpose commercial and industrial applications. It also provides an intuitive user interface, communications capability and self diagnostics. The ZTG Series is available in a full range of ampere, voltage and pole configurations, along with many commonly requested options and features.



  • ZTG - Standard (Open) Transition
    The Zenith ZTG transfer switch is used in general and mixed load applications.
  • ZTGD - Delayed Transition
    The Zenith ZTGD transfer switch is used for the transfer of large motor or inductive loads.

Features and Benefits

  • Close differential under-voltage sensing of the normal source
  • Voltage and frequency sensing of the emergency source
  • Test switch (fast test/load/no load) to simulate normal source failure - automatically bypassed should the emergency source fail
  • Double throw, interlocked operation
  • Electrically operated, mechanically held by a simple, over-center mechanism
  • Segmented silver tungsten alloy contacts with separate arcing contacts on 600 amps and above
  • Arc quenching grids, enclosed arc chambers and wide contact air gap for superior source-to-source isolation on all units
  • Control circuit disconnect plug and drive inhibit switch for safe maintenance
  • Components accessible for inspection and maintenance without removal of the switch or the power conductors
  • Mechanical indicator and contact chamber cover designed for inspection, safety and position designation
  • Offering a Warranty Period of twenty-four (24) months or two years from the date of shipment


Product Scope

  • Ratings 40 to 3000 amperes
  • 120 - 600 Volts
  • 50 or 60 Hz
  • 2, 3 or 4 poles
  • Double throw, mechanically interlocked contactor mechanism
  • Suitable for emergency and standby applications
  • Open type, NEMA 1, 3R, 4, 4X and 12 enclosures

Service Offering

  • GE Power Quality is a global leader in innovative technology, service and support to the power quality industry
  • 75 Factory-Direct Power Quality field service engineers
  • Over 150 Factory Authorized Service Centers throughout North America and International
  • Remote Monitoring and Diagnostics Project Management
  • Retrofit, upgrades, and preventative maintenance
  • Toll-Free 7x24 Customer Service call center @ 1-800-637-1738
  • For replacement parts, call 1-800-637-1738, or eMail
  • For extended warranty and full-coverage service contracts, call 1-800-637-1738 or email