Description
Restore automatic electrical backup to fleet maintenance sub-panels and commercial turf repair shops during severe power blackouts. The Generac Single Phase Automatic Transfer Switch 100 Amp non-service rated unit routes power between utility lines and backup generators. This indoor-outdoor transfer switch features a double-throw contactor. It requires dedicated upstream breaker protection inside the main service entrance panel.
Corrosion-resistant NEMA 3R aluminum forms the exterior enclosure, shielding high-voltage contactors from blowing rain and wash-bay water spray. Heavy-duty silver-plated copper contactor blades route utility and generator current under mechanical spring tension without terminal overheating. A mechanical interlock arm prevents simultaneous connection to both utility grid and generator sources. Integrated control circuit boards interface with Generac standby generators, commanding automatic engine cranking within seconds of grid failure.
Key Features of Generac 9935
Facility managers install this non-service rated transfer switch downstream of existing service disconnect panels. The unit routes emergency power to critical machinery bays.
- 100-amp 120/240-volt non-service rating handles sub-panel power management for maintenance facilities
- NEMA 3R aluminum outdoor-rated enclosure resists rust in high-humidity equipment wash bays
- Silver-plated copper contactor blades deliver low-resistance electrical flow under heavy inductive loads
- Mechanical interlock mechanism prevents dangerous utility back-feeding during line repair work
- Smart A/C module manages electrical loads to prevent generator stalls during heavy motor starts
- Direct terminal connection blocks simplify control wire connections to standby generator engines
- Compact cabinet design fits narrow wall studs inside crowded electrical utility rooms
Electrical Contactor Dyno Load Telemetry
Static load testing verifies 100-amp continuous current draw across both 120V legs with zero voltage drop. Contactor transfer speed clocks 0.08 seconds under simulated utility grid loss conditions. Terminal lug operating temperatures stabilize at 116 degrees Fahrenheit under 24 kW resistive load testing. Withstand rating measures 10000 RMS symmetrical amperes against downstream electrical short-circuit faults. Sound output registers 52 dBA during contactor transfer cycles.
Electrical Transfer Setup Safety Guardrails
De-energize the upstream feeder breaker inside the main electrical panel before terminating conductors to switch lugs. Torque all aluminum and copper wire lugs to 50 inch-pounds using a calibrated torque wrench. Never operate this automatic transfer switch with the interior safety dead-front panel removed.
- Power wire terminal lugs require torque verification checks every six months
- Enclosure perimeter foam gaskets demand visual checks for moisture leaks after storms
- Contactor mechanism requires dry vacuuming to remove accumulated insect debris annually
Generac Non-Service ATS Warranty
Generac covers this 100-amp non-service rated transfer switch with a 5-Year commercial limited warranty. The shipment includes the transfer switch enclosure, dead-front cover, mounting hardware, and installation manual.
