Generac RTSN400J3 400 Amp 120/240V 3-Phase Non-SE Rated NEMA 3R Automatic Transfer Switch

This 400A three-phase automatic switch, designed for non-service entrance applications, comes housed in a durable NEMA 3R rated outdoor enclosure. It is equipped with a heavy-duty contactor engineered for reliable, long-term operation. Additionally, it includes a 2-year limited warranty for added peace of mind.

All non-service rated switches are available in 120/208 3ø, 120/240 3ø, and 277/480 3ø. All switches are open transition.

Standard Features:

• All non-service rated transfer switches are housed in a steel NEMA Type 3R enclosure, with electrostatically applied and baked powder paint. The Heavy Duty Generac Contactor is an ETL recognized device, designed for years of service. The controller at the generator handles all the timing, sensing, exercising functions, and transfer commands.

Features:

• Electrically operated, mechanically-held contacts for fast, positive connections.
• Rated for all classes of load, 100% equipment rated, both inductive and resistive.
• Main contacts are silver plated or silver alloy to resist welding and sticking.
• NEMA 3R (indoor/outdoor rated) steel enclosure is standard.
• 160 millisecond transfer time.
• Single coil design.
• Limited 2 year warranty.

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 Second
• Standby Voltage Sensor: 60% for 5 Seconds
• Utility Voltage Pickup: >80%
• Re-transfer Time Delay: 15 Seconds
• Engine Cooldown Timer: 60 Seconds (5 minutes on turbo configuration)
• 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: RTSN400J3
• Amps: 400
• Voltage: 120/240 3Ø
• Load Transition Type (Automatic): Open Transition
• Enclosure Type: NEMA 3R Withstand Rating (Amps): 35,000
• Lug Range: 600 MCM - #4 or 1/0 - 250 MCM

Dimensions:

• Height - in (mm): 36.1 (91.7)
• Width - in (mm): 24 (60.9)
• Depth - in (mm): 10 (25.4)
• Weight - lbs (kg): 133 (60.3)