Automatic transfer Switches
Momentary loss of electric power to mission critical loads can endanger life, cause severe financial losses, or both. Todays 7x24 service centers, data warehouses and critical healthcare facilities demand more than just continuity of power. The quality of power delivered to the load, the effectiveness of periodic system testing and the ability to diagnose outages and disturbances in the electrical system are issues that have serious implications for critical facilities. Poor power quality damages equipment and increases maintenance costs. Inherent power problems stay hidden when testing is ineffective or incomplete. Going beyond source switching and addressing the issues of complete power quality requires a whole new level of ATS capability.

ZTE Series, Standard (Open) Transition
The GE Zenith ZTE standard (open) transition transfer switches  
go beyond just source switching. Integral metering and communications, high-level diagnostics and superlative flexibility make the ZTE a perfect solution for today’s mission critical source switching.  
ZTED Series, Delayed Transition
The ZTED - Delayed Transition transfer switch offers the same features as the ZTE with the addition of 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.
ZTECT Series, Closed Transition
The ZTED - Delayed Transition transfer switch offers the same features as the ZTE with the addition of GE Zenith Controls' high-speed drive system, which ensures the overlap of the normal and alternate sources is less than 100 milliseconds. When one source is not within normal limits, such as during a power outage, the ZTECT automatically operates in delayed transition mode.

Features & Benefits
Robust switching mechanisms
  • Ratings 40 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
  • Suitable for emergency and standby applications on all classes of load, 100% tungsten rated through 400 amps
  • 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
  • Durable, long-life solenoid operated mechanism
  • ISO 9001 certified manufacturing plant
  • GE-engineered and manufactured contacts and arc quenching components
  • UL 3-cycle (unconditional) short circuit withstand & close ratings

  • Advanced user interface & controls
  • Color graphical display with built-in Help menus
  • System status LEDs and menu-driven soft keys
  • Dedicated control and navigational pushbuttons
  • Front accessible USB programming port
  • Password protected control switches

Built-in power quality metering
  • 3-phase current, including neutral, voltage, power, energy, frequency and harmonics (THD)
  • 20 Channel Data Logger with sampling rates user-configurable from 1 cycle to 60 minutes

Enhanced connectivity
  • Built-in RS-485 serial and RJ-45 Ethernet
  • Open protocols - Modbus RTU and TCP/IP
  • User-configurable data map
  • Download of event, waveform, and data log to PC
  • Customized control logic using GE FlexLogic
  • Local/remote configuration via EnerVista MX350 Setup software
  • Plug-and-play PC monitoring and control using EnerVista Viewpoint Monitoring software

Diagnostics & event recording
  • Power source anomaly events recorder
  • Detailed transfer event reporting
  • Local storage of 256 time-stamped events with 1 ms resolution
  • User-configurable alarms
Flexible feature assignment
  • Field modification of control features
  • User-configurable load control contacts
  • Reduced commissioning delays from incorrect configuration 
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