ZTG Series Transfer Switch


Designed for a wide variety of loads and applications, the ZTG Series builds on ZTS technology while providing a pre-engineered project solution.

The series uses the MX150 microprocessor control system, which includes as standard many of the most common features specified on a transfer switch. It also provides an intuitive user interface, communications capability and self diagnostics.

The ZTG is available in a full range of ampere, voltage and pole configurations, along with many commonly requested options and enclosure types.

features & 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

Product Scope
- Ratings 40 to 3000 amperes
- 2, 3 or 4 poles
- Double throw, mechanically interlocked contactor mechanism
- Suitable for emergency and standby applications
- UL 1008 listed at 480 VAC
- CSA certified at 600 VAC
- IEC 947-6-1 listed at 480 VAC
- Open type, NEMA 1, 3R, 4, 4X and 12
- 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

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