Generac RTSW400A3 400 Amp 120/240V 1-Phase SE Rated NEMA 3R Automatic Transfer Switch

The Generac Smart Switch, Service Rated, 400A, 120/240, 1P, NEMA 3R aluminum enclosure and a robust Generac Contactor, specifically designed for single-phase generators. It utilizes built-in load management technology to control up to four separate HVAC loads without the need for extra accessories.

Generac Automatic Transfer Switches are designed for use with single phase generators that utilize an Evolution™ or Nexus™ Controller. The 400 amp open transition switch is available in single phase in both service equipment rated and non-service equipment rated configurations. The 300 amp open transition switch is only available in a service rated equipment configuration.

Standard Features:

• Service rated (RTSW) Generac Automatic Transfer Switches are housed in an aluminum NEMA Type 3R enclosure*, with electrostatically applied and baked powder paint. The Heavy Duty Generac Contactor is a ETL recognized device, designed for years of service. The controller at the generator handles all the timing, sensing, exercising functions, and transfer commands. All switches are covered by a 5 year limited warranty.
• * Non-service rated (RTSC) switches 400 amp and above are housed in a steel enclosure.

Load Management Technoloy:

• Through the use of the integrated Smart A/C Module (SACM), these switches have the capability to manage up to four individual HVAC (24 VAC controlled) loads with no additional hardware. When used in tandem with Smart Management Modules, up to eight more loads can be managed as well, providing the most installation efficient power management options available.

Functions:

All timing sensing functions originate in the generator controller

• Utility Voltage Drop-out: <60%
• Timer to Generator Start: 10 Second Factory Set, Adjustable Between 2 - 1,500 Seconds by a Qualified Dealer*
• Engine Warmup Delay: 5 seconds
• Standby Voltage Sensor: 60% for 5 Seconds
• Utility Voltage Pickup: >80%
• Re-transfer Time Delay: 15 Seconds
• Engine Cooldown Timer: 60 Seconds
• Exerciser: Nexus™: 12 Minutes Weekly and Evolution™: 5 to 12 Minutes Adjustable, Weekly/Bi-weekly/ Monthly
• The Transfer Switch can be Operated Manually Without Power Applied

*When used in conjunction with units utilizing Evolution™ controls.

Specifications:

• Model: RTSW400A3
• Amps: 400
• Voltage: 120/240, 1ø
• Load Transition Type (Automatic): Open Transition Service Rated
• Enclosure Type: NEMA 3R
• ETL Rating: ETL
• Withstand Rating (Amps): 22,000
• Lug Range: 600 MCM - #4 or (2) 1/0 - 250 MCM

Dimensions:

• Height - in (mm): 48.0 (1,219.2)
• Width - in (mm): 21.8 (554.2)
• Depth - in (mm): 10.0 (255.5)
• Weight - lbs (kg): 140.0 (63.5)