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Vigilant® Automatic Transfer Switches 

The Vigilant Series automatic transfer switch is designed to automatically transfer critical loads in the event of a power outage for residential, agricultural, commercial and light industrial applications. Units come standard as NEMA 3R, UL listed 1008. The simple, rugged and easy to install and operate design provides peace of mind that it works right when it’s needed most.

  • Galvanized Corrosion Protection – Standard on all Vigilant enclosures; this duplex coated, galvanized G90 grade steel meets American Society for testing and Materials (ASTM) standard A653, with a service life of more than twice that of regular steel.
  • Exterior Accessibility – The easy-to-use, 7-day exerciser clock gives full control over day and time. The exerciser clock and indicator lamps are both accessible from outside the transfer switch – no need to open the door.
  • Logic Control Board – Located in the center of every Vigilant automatic transfer switch. It provides transfer switch control function with simplicity, flexibility and durability.
  • 2-Year Warranty
Single-Phase
Model VTS01001240SX VTS02001240SX VTS04001240SX VTS06001240SX
Current 100 A 200 A 400 A 600 A
Voltage 120 Vac/240 Vac 
Poles/Wires 2-pole/3-wire
Wire Range 1/0-#12
(1-hole lug)
250MCM-1/0
(1-hole lug)
(1) 600MCM-#4 or
(2) 250MCM-1/0
(1-hole lug)
600MCM-#2
(2-hole lug)
Three-Phase – WYE Power Supply Required
Model VTS04003208SX VTS06003208SX VTS04003480SX VTS06003480SX
Current 400 A 600 A 400 A 600 A
Voltage 120 Vac/208 Vac  277 Vac/480 Vac 
Poles/Wires 3-pole/4-wire
Wire Range (1) 600MCM-#4 or
(2) 250MCM-1/0
(1-hole lug)
600MCM-#2
(2-hole lug)
(1) 600MCM-#4 or
(2) 250MCM-1/0
(1-hole lug)
600MCM-#2
(2-hole lug)

Cost of shipping is included in our online list price!

  • $937.75 In Stock

    The Vigilant® Series automatic transfer switch is designed to automatically transfer critical loads in the event of a power outage for residential, agricultural, commercial and light industrial applications. Units come standard as NEMA 3R, UL listed 1008. The simple, rugged and easy to install and operate design provides peace of mind that it works right...

  • $1,347.50 In Stock

    The Vigilant® Series automatic transfer switch is designed to automatically transfer critical loads in the event of a power outage for residential, agricultural, commercial and light industrial applications. Units come standard as NEMA 3R, UL listed 1008. The simple, rugged and easy to install and operate design provides peace of mind that it works right...

  • $2,719.20 In Stock

    The Vigilant® Series automatic transfer switch is designed to automatically transfer critical loads in the event of a power outage for residential, agricultural, commercial and light industrial applications. Units come standard as NEMA 3R, UL listed 1008. The simple, rugged and easy to install and operate design provides peace of mind that it works right...

  • $7,627.95 In Stock

    The Vigilant® Series automatic transfer switch is designed to automatically transfer critical loads in the event of a power outage for residential, agricultural, commercial and light industrial applications. Units come standard as NEMA 3R, UL listed 1008. The simple, rugged and easy to install and operate design provides peace of mind that it works right...

  • $3,418.80 In Stock

    The Vigilant® Series automatic transfer switch is designed to automatically transfer critical loads in the event of a power outage for residential, agricultural, commercial and light industrial applications. Units come standard as NEMA 3R, UL listed 1008. The simple, rugged and easy to install and operate design provides peace of mind that it works right...

  • $8,492.00 In Stock

    The Vigilant® Series automatic transfer switch is designed to automatically transfer critical loads in the event of a power outage for residential, agricultural, commercial and light industrial applications. Units come standard as NEMA 3R, UL listed 1008. The simple, rugged and easy to install and operate design provides peace of mind that it works right...

  • $3,468.85 In Stock

    The Vigilant® Series automatic transfer switch is designed to automatically transfer critical loads in the event of a power outage for residential, agricultural, commercial and light industrial applications. Units come standard as NEMA 3R, UL listed 1008. The simple, rugged and easy to install and operate design provides peace of mind that it works right...

  • $7,648.30 In Stock

    The Vigilant® Series automatic transfer switch is designed to automatically transfer critical loads in the event of a power outage for residential, agricultural, commercial and light industrial applications. Units come standard as NEMA 3R, UL listed 1008. The simple, rugged and easy to install and operate design provides peace of mind that it works right...

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