Thomson TS870 | 1200A 3-Phase Automatic Transfer Switch SKU: TS870 1200A
- 1,200A automatic transfer switch, three-phase, non-service entrance rated
- Open transition (break-before-make) operation with optional closed transition
- TSC 7320 digital controller with backlit LCD display and programmable inputs/outputs
- UL 1008 and CSA C22.2 No. 178 listed
- NEMA 1 standard enclosure; optional NEMA 3R outdoor enclosure available
Key Features:
- 1,200A continuous rated capacity, three-phase, up to 600VAC, 3-wire or 4-wire systems
- Non-service entrance rated — upstream molded case circuit breakers or fuses with overcurrent protection required on both utility and generator sides
- Two mechanically interlocked power switching units for inherent source separation and reliable operation
- Fully enclosed silver alloy contacts providing high withstand rating and 100% continuous current rating
- Open transition (break-before-make) as standard — adjustable neutral position delay prevents out-of-phase load transfers for full equipment protection
- Optional closed transition (make-before-break) for seamless transfers with zero interruption time
- Solid neutral standard on 4-wire systems
- Heavy-duty brushless gearmotor and operating mechanism for extended service life and mechanical reliability
- Bypass isolation option available for 400–1200A units — allows maintenance without interrupting power to the load
- TSC 7320 microprocessor digital controller with 2.3″ backlit LCD for real-time monitoring of voltage, frequency, and load status
- Front-panel editing with PIN protection and customizable status screens
- Fully adjustable time delays for engine start, engine cool-down, transfer, and retransfer
- Five pre-programmed output contacts for core ATS functions: Load on Utility, Load on Generator, Load Disconnect, Fail to Transfer, and ATS Not in Auto
- 8 programmable digital inputs (voltage-free) for custom site integration
- 2-wire dry contact for automatic generator start — integrates with most standby generator systems
- Built-in programmable exerciser timer for scheduled on-load or off-load testing
- Local and remote utility power failure simulation test capability
- Under/over frequency protection for both utility and generator sources
- Three-phase overvoltage, phase loss, phase unbalance, and phase sequence/rotation protection
- Generator bus power metering capability (amps, volts, frequency, kW, kVA, power factor)
- RS485 Modbus remote communication port for system integration
- Control circuit isolation plug for safe disconnection from all power sources
- Meets NFPA 110 requirements for emergency and standby power systems
- UL 1008 and CSA C22.2 No. 178 listed
Applications:
- Commercial and industrial facilities
- Healthcare and hospital critical systems
- Data centers and mission-critical infrastructure
- Wastewater treatment and utility operations
- Manufacturing and industrial plants
- Commercial and institutional buildings
Voltage Range: 120V to 600VAC, 3-phase, 50/60Hz
