600 Amp Automatic Transfer Switching for 120/208V Three-Phase Wye Systems
The RTSN600G3 is a 600 Amp Automatic Transfer Switch (ATS) engineered to provide seamless automatic power source transition between utility and generator feeds. Configured for 120/208 Volt, 3-Phase (3P) Wye systems, this switch is ideal for mid-sized commercial buildings, multi-tenant facilities, and light industrial applications requiring reliable backup power for mixed single-phase and three-phase loads.
Key Specifications:
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Amperage: 600 Amps
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Voltage: 120/208 Volts, 3-Phase (3P), 4-Wire + Ground (Wye configuration)
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Enclosure Type: NEMA 3R (Rainproof, sleet-resistant – suitable for outdoor installation)
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Rating: Non-Service Rated (Requires upstream overcurrent protection; no internal main breaker)
Core Features:
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Fully Automatic Operation: The microprocessor-based controller continuously monitors utility power quality. Upon utility failure, undervoltage, phase loss, or frequency deviation, it signals the generator to start, transfers the load to emergency power once stable, and automatically retransfers to utility when normal power is restored, followed by an adjustable engine cooldown cycle.
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120/208V 3-Phase Wye Configuration: Supports the most common three-phase voltage in North American commercial buildings. Provides 208V three-phase for HVAC compressors, elevators, and pumps, plus 120V single-phase for lighting, receptacles, office equipment, and point-of-sale systems.
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NEMA 3R Outdoor Enclosure: Heavy-gauge galvanized steel cabinet with a corrosion-resistant powder-coated finish. Designed to withstand rain, snow, and sleet, allowing for safe outdoor pad or wall mounting without requiring a separate electrical room or building.
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Non-Service Rated Design: Cost-effective and space-saving solution for installations where overcurrent protection is already provided by an upstream main circuit breaker or fused disconnect. Contains no integral main breaker.
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High Withstand Rating: Engineered to coordinate with upstream protective devices, safely withstanding available fault currents without damage when properly protected.
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Electrically Operated / Mechanically Held: Mechanically held contacts eliminate continuous coil power draw, reduce heat buildup, and ensure positive contact retention for reliable long-term performance.
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Digital Controller Features:
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LED status indicators (Source 1 Available, Source 2 Available, Load on Source 1/2)
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Push-button manual test and transfer (live or no-load test modes)
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Programmable weekly generator exercise timer with day/time selection
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Event logging and non-volatile fault memory
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Adjustable voltage and frequency sensing thresholds
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Time delays for engine start, transfer, retransfer, and cooldown
Typical Applications:
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Mid-sized office buildings and medical offices
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Restaurants and grocery stores
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Retail shopping centers and strip malls
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Schools, churches, and municipal buildings
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Multi-tenant residential common loads (elevators, pumps, hallway lighting)
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Small data centers and server rooms
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Urgent care clinics and dental offices
