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ASCO Transfer Switch

Model #

ASCO400A300SE

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ASCO 400-Amp Automatic Transfer Switch 3-Phase Service Rated NEMA 3R | ASCO400A300SE

  • ASCO 400 Amp Series 300 Transfer Switch
  • Service Rated Disconnect
  • Available in 208, 240, 480 Volts 3-Phase
  • NEMA 3R Aluminum Enclosure
  • Series 300 Group G Microprocessor Controller
  • UL 1008 Listed
  • 3-Year Limited Warranty

ASCO Transfer Switch ASCO400A300SE Details and Specifications

400 Amp ASCO Transfer Switch Series 300

400-Amp ATS     ASCO 300 Series     208 - 240 - 480 Volts 3-Phase    Service Rated    NEMA 3R

With Group G Controller

The ASCO Series 300 Automatic Transfer Switch has the most compact design of all generator transfer switches in the industry. This 400-Amp transfer switch restores critical loads after a loss of power from the main source. A Group G controller provides dependable operation in any environment with a user-friendly interface. Intuitive symbols make operation easy while LED indicators display transfer switch status. Adjust operating parameters and feature settings without opening the door.

Rugged construction and proven performance for years of reliability. Handles extraordinary demands when switching stalled motors or high inrush loads.

Series 300 Group G Controller

  • See image in gallery
  • Touch pad programming
  • 128x64 graphical display
  • Intuitive symbols for easy operation
  • LED indicators display transfer switch status
  • Active timer display
  • On-board diagnostics
  • Password protection
  • Voltage & frequency sensing
  • Status & control functions
  • Predictive outage feature

ASCO 400-Amp Series 300 Non-SE Transfer Switch

The 400-Amp transfer switch is completely front accessible. Access the Group G controller from the front of the switch without opening the door to change settings and access features. 

  • UL 1008 Listed
  • Interlocked single solenoid design prevents simultaneous source connections
  • Won't transfer to a dead source
  • Available in 208, 240, 480 Volts 3 Phase

See the ASCO brochure for more features.

Briggs & Stratton 3-Year Limited Warranty

Product Specifications

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ASCO Transfer Switch

Model #

ASCO400A300SE

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Ships Factory Direct In 22-26 Weeks

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