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Other Range of Closed Transition Transfer Switches ZBTSCT
Loads such as electronic equipment, HID lighting, motor starters and the like are sensitive to even the 30- to 100-millisecond outage experienced during a typical transfer switch operation. Therefore, testing and use of the standby system may not be optimized, and necessary system checks may be omitted, because of concerns about the effects of transfer.
In addition, opportunities for peak shaving and utility incentive rates may be passed over because of the inability to accept short power interruptions.
The solution is GE Zenith Controls ZTSCT Closed Transition Transfer Switch.
Our proven switching technology combines with controls developed through years of experience with synchronizing switchgear to provide worry-free transfers in a closed transition mode. With GE Zenith Controls high-speed drive system, 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 ZTSCT operates in an open transition mode.
Electrical Ratings
- Ratings 100 to 4000 amperes
- 2, 3 or 4 poles
- Open type, NEMA 1, 3R, 4, 4X and 12
- Available in ZTSCT (transfer switch) or ZBTSCT (transfer/bypass switch) styles
- Suitable for emergency and standby applications on all classes of load, 100% tungsten rated through 400 amps
- UL 1008 listed at 480 VAC
- CSA certified at 600 VAC
- IEC listed 480 VAC
Performance Features
- Incorporates the applicable features of the ZTS and ZBTS Series
- Source parallel time of less than 100 milliseconds
- Closed transition operation (no power interruption) during transfer and retransfer when sources are within specified parameters
- Open transition transfer operation is initiated upon a source failure
- Available in ZTSCT (utility-generator), ZTSCTU (utility-utility) and ZTSCTM (manual) configurations
Design and Construction Features
- Electrically operated, mechanically held
- 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
- Components accessible for inspection and maintenance without removal of the switch or power conductors
- Standard annunciation and operational selection package for user interface
- Active control of the generator governor not required, but available as an option
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