Zenith ZTSM& ZTGM
2Pages

Catalog excerpts

GE Energy Digital Energy Zenith ZTSM & ZTGM Manual Transfer Switches Introduction Some emergency power installations require multiple automatic transfer switches, each feeding a specific load. In many installations where non-critical loads are being served, specifications may call for manual or non-automatic transfer switches. This method is used because operating personnel are present and the loads are not of a critical nature requiring unattended automatic operation. Because of the less critical function of this equipment, no specific industry requirements have been established. As a result, devices such as double throw disconnect switches have been used. Since the non-automatic transfer switches are part of the emergency power supply system, they should have the same UL 1008 electrical ratings as the automatic transfer switches feeding critical loads. In the event of a short circuit, the non-automatic transfer switches must have the same withstand current ratings as the automatic transfer switches and they must be as rugged and dependable. Features and Benets To meet this need, GE has developed the Zenith ZTSM and ZTGM Series electrically operated, mechanically held non-automatic transfer switches. These units feature the same construction as the Zenith ZTS and ZTG Series of automatic transfer switches and are supplied with the same electrical ratings and mechanical features. The manual series is electrically operated by means of push buttons mounted on the switch enclosure or at a remote location. Unlike the above mentioned handle- operated disconnect switches, the Zenith ZTSM and ZTGM Series offers additional protection by incorporating Source 1 and Source 2 voltage sensing relays which will not permit the switch to be manually transferred unless the source to which it is being transferred is at 90% of its rated voltage. In addition, the Zenith ZTSM and ZTGM Series are tested and listed per UL 1008 standards. Manual handle-operated, double throw disconnect switches are not listed to this critical standard.

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• Available for operation on all standard voltage systems Closed when switch is in Source 2 position Closed when switch is in Source 1 position Indicating LED Pilot Lights: L1 • Available in standard, delayed and closed transition versions Indicates Source 1 available Indicates switch in Source 1 position • Zenith ZTGM Withstand Current Ratings: Same as Zenith ZTG Series automatic transfer switches Indicates switch in Source 2 position • Zenith ZTSM Withstand Current Ratings: Same as Zenith ZTS Series automatic transfer switches • Bypass-Isolation units (Zenith ZBTS Series) also available...

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Zenith ZTSM& ZTGM 2Pages

Catalog excerpts

All GE Automatic Transfer Switches catalogs and technical brochures

Zenith ZTSM& ZTGM
2Pages