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ZTS Series - Automatic Transfer Switch

Provides highly reliable and flexible source switching for essential healthcare equipment and business critical applications, including make-before break switching. Call 1-800-352-3361 for assistance selecting your switch.


General Electric Logo

General Electric ZTS Series ATS

Related Market:
Business, Industrial Critical


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

The Zenith ZTS Series GE automatic transfer switch (ATS) is designed for business and industrial critical applications requiring both reliability and advanced operation. The ZTS Series uses the MX250 microprocessor control system, which is specifically used in business and industrial critical applications. The ZTS Series incorporates an intuitive user interface, communications capability and self diagnostic tool.

The ZTS Series is available in a wide range of amps, volts and pole configurations, as well as various options and features.

ZTS Series Features and Benefits:

  • Contact transfer speed less than 100 milliseconds
  • High close-in and withstand capability
  • 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

ZTS Series Specifications:

  • Temperature rise test per UL 1008 conducted after overload and endurance tests in unventilated enclosure-exceeds UL requirements
  • UL 1008 listed at 480 VAC
  • UL 1008 7th edition standard
  • CSA certified at 600 VAC
  • Seismic certified to IEEE-693-2005 at HIGH level with 2.5 amplification factor
  • Seismic certified to IBC-2006 at Ip=1.5 for z/h less than or equal to 1
  • Seismic certified to OSHPD using testing standard ICC-ES AC-156
  • ISO 9001 certified manufacturing plant
  • UL 3-cycle (unconditional) short circuit withstand & close ratings
  • OSHPD seismic qualifications

ZTS Series Scope:

  • Ratings 40 to 4000 amperes
  • 120 - 600 Volts
  • 2, 3 or 4 poles
  • Open type, NEMA 1, 3R, 4, 4X and 12 enclosures
  • 120 to 600 VAC, 50 or 60 Hz
  • Suitable for emergency and standby applications on all classes of load, 100% tungsten rated through 400 amps
  • Available in ZTS (utility-generator), ZTSU (utility-utility), ZTSG (generator-generator) and ZTSM (manual) configurations


General Electric Logo

General Electric ZTS Series ATS

Related Market:
Business, Industrial Critical


ZBTS - Bypass / Isolation

The Zenith ZBTS Series of Bypass / Isolation Automatic Transfer Switches (ATS) are designed with business and industrial critical applications in mind, requiring the reliability and advanced operation. As with the ZTS Series, the the ZBTS model uses the MX250 microprocessor control system. The ZBTS Series is equipped with an intuitive user interface, communications capability and a self diagnostic tool.

Zenith ZBTS Series Bypass-Isolation GE Transfer Switches are the answer for when you don't have the option of interrupting power for service, maintenance, or testing. The ZBTS Series incorporates a rugged construction for durability with a quick make / quick break bypass switch manual load transfer handle, and General Electric's control / interlock system, which consists of both mechanical and electrical interlocks.

The bypass uses normal failure sensing and a time delay to start the engine automatically when failure occurs or when the ATS has been removed for service.

ZBTS - Bypass / Isolation Features and Benefits:

  • Load is not interrupted during bypass & isolation operation
  • High close-in and withstand capacity
  • General Electric ATS is located on a draw-out mechanism to facilitate maintenance
  • Emergency power systems can be electrically tested without disturbing the load
  • Power cables do not have to be disconnected to remove General Electric ATS
  • Bypass to any available source with ATSremoved
  • Engine start circuit maintained during bypass operation; normal power failure causes engine start contact closure even with the ATS removed
  • Diagnostic lights and detailed instructions for simple step-by-step operation
  • Mechanical and electrical interlocks ensure proper sequence of operation
  • Bypass switch contacts are closed only during the bypass-isolation operation
  • Silverplated copper bus interconnection of the transfer and bypass switches on all sizes

ZBTS - Bypass / Isolation Specifications:

  • Temperature rise test per UL 1008 conducted after overload and endurance tests in unventilated enclosure-exceeds UL requirements
  • UL 1008 listed at 480 VAC
  • CSA C22.2 No. 178 certified at 600 VAC
  • Seismic certified to IEEE-693-2005 at HIGH level with 2.5 amplification factor
  • Seismic certified to IBC-2006 at Ip=1.5 for z/h less than or equal to 1
  • Seismic certified to OSHPD using testing standard ICC-ES AC-156
  • ISO 9001 certified manufacturing plant
  • UL 3-cycle (unconditional) short circuit withstand & close ratings
  • OSHPD seismic qualifications

ZBTS - Bypass / Isolation Scope:

  • Ratings 100 to 4000 amperes
  • 2, 3 or 4 poles
  • Open type, NEMA 1, 3R, 4, 4X and 12 enclosures
  • 120 to 600 VAC, 50 or 60 Hz
  • Bypass and automatic GE transfer switch have identical ratings
  • Suitable for emergency and standby applications on all classes of load, 100% tungsten rated through 400 amps
  • Available in ZBTS (utility-generator), ZBTSU (utility-utility), ZBTSG (generator-generator) and ZBTSM (manual) configurations


General Electric Logo

General Electric ZTSMV Series

Related Market:
Business, Industrial Critical


ZTSMV - Medium Voltage (5-15kV Class)

The Zenith ZTSMV Series of transfer switches is a medium voltage version of the ZTS. This unit is also built for business and industrial critical applications where reliability and advanced operation is required all within a 5-15kV class design . This ZTS Model incorporates an intuitive user interface, communications capability and self diagnostic tool. The ZTSMV Series is available with an extensive list of options, features and ratings to fit your specific needs.

ZTSMV - Medium Voltage Features and Benefits:

  • Front and rear accessible
  • Vacuum circuit breaker design
  • Electrically interlocked for secure operation
  • Overcurrent protection on the generator source breaker
  • Compliance with ANSI/EEE spec C37
  • Drawout P.T. trunnion design on utility to facilitate removal of control fuses from rear of cabinet
  • Control module isolated from power section
  • Control module 25 provided for use with generator as an alternate source
  • Control circuit disconnect switch

ZTSMV - Medium Voltage Scope:

  • ZTS Series, MV

    • Rated voltage 5kV
    • System voltage 2.4 or 5kV
    • Rated current 600 amp
    • Interrupting current 16,000 amp
    • Making current 31,500 amp
    • Short Time Current 12,500 amp
    • MVA 100
    • Transfer time 6 cycles
    • Switching life 10,000/10,000 OP (load/no load)

    ZTS Series, MVD

    • Rated voltage 5kV, 15kV
    • System voltage 2.4-5kV 7.2-15kV
    • Rated current 1200-3000 amp
    • Interrupting and withstand current 25,000-49,000 amp 25,000-48,000 amp
    • MVA 250-350 500-1000
    • Transfer time 6 cycles
    • Switching life 2000/10,000 OP (load/no load)

For help selecting the right automatic transfer switches
contact power@rackmountsolutions.net or call (800) 352-6631