The switches in this group are designed for specific critical applications. They are utilized in industrial standard applications requiring dependability and ease of operation. These switches combine reliability, flexibility and ease of use in a rugged industrial package. All these switches work together with any remote-start generator that use two-wire control, allowing the standby power system to be fully automatic. Designed for specific applications, this Series builds on ZTS technology while providing a pre-engineered project solution.

The ZTS Series is the building block of our transfer switch product line including all the switches shown on this page. This ruggedly built power contactor family of switches has been specifically designed for transfer switch duty with dependability, versatility and user friendliness of prime concern. These special switches are available in NEMA enclosures to the customer’s specifications.

          General Information:

• GE Zenith’s ZT3000 Series Transfer Switches are designed for emergency, critical and life support standby and prime power applications.
• Standard models in stock, dropped shipped to your location. FREE SHIPPING when purchased with a generator!
• Sizes include 40 to 4,000 amps with 2, 3 or 4 pole configurations.
• Available 120/240 VAC, 120/208 VAC, 277/480 VAC and other voltages up to 600 VAC. See Factory Brochure under Additional Information.
• Switch is true double throw, mechanically interlocked and mechanically held, electrically operated utilizing a reliable, field-proven single solenoid operator.
• Switch mechanism absolutely prohibits connecting both sources together. Cannot be over-ridden.
• Available in ZTSCT (utility-generator), ZTSCTU (utility-utility), ZTSCTM (manual) configurations.
• Available in NEMA Type 1 (indoor), 3R (outdoor) enclosures and open (back-panel mounted) configurations as well as NEMA 4, 4X & 12.
• Dimensions shown on ZTS Dimensions under Additional Information.
• GE Zenith’s ZT3000 switches are equipped with the MX250 control panel. This microprocessor control includes:
• Under-voltage sensing (90% pickup, 80% dropout) of Source 1 (normal).
• Voltage and frequency sensing of Source 2 (emergency), (90% voltage, 95% frequency pickup).
• Time Delay Engine Start (P) - 0-10 seconds, factory setting 3 seconds.
• Time Delay Engine Warm-up (W) - Transfer to Emergency (Source 2) - 0 -5 minutes, factory setting 1 second.
• Time Delay Utility Stabilization/Retransfer to Utility (Source 1) (T) - 0-60 minutes, factory setting 30 minutes.
• Time Delay Engine Cool Down (U) - 0-60 minutes, factory setting 5 minutes.
• Generator exerciser timer built-in. 365 day adjustable time setting. Factory set at 7 days. Exercises Source 2 with or without load.
• Switches feature contacts that are easily accessible for easy inspection and preventive maintenance.
• Rated for standby applications and intended for use only in optional (non-critical) standby systems in accordance with the National Electrical Code. NEC/NFPA 70, Article 702.
• Not intended for emergency or life-support systems.
• Qualified and listed to
UL 1008, CSA 22.2 and IEC, 480 VAC 50/60 Hz for automatic transfer equipment standards.
• For technical data, dimensions, features, remote controls, monitoring, warranty and other information. See Additional Information below.

We recommend ZTS switches when purchasing any standby or primary power generator systems. If you require less features or a lower price point then this series, See the ZTG series, See GE Zenith, ZTG & ZTGDT, Residential, Commercial & Industrial Transfer Switches. If you require a switch that will handle large motor loads or inductive loads (without special closures and bypasses, See GE Zenith, ZTS Industrial Automatic Transfer Switches, Service Entrance. For Residential and commercial applications, See GE Zenith, ZTX Light Duty Residential & Commercial Transfer Switches. For ZTSCT Closed Transition, ZBTS Automatic Transition Bypass, ZBTSD Delayed Transition Bypass and ZBTSCT Closed Transition Bypass, See GE Zenith, ZTSCT, ZBTS, ZBTSD & ZBTSCT, Industrial Automatic Transfer Switches. Prices and the most common accessories are online on this website for all models.