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Automatic 3Ph 4000A

We offer quality 4000 Amp three phase automatic transfer switches from Asco and Thomson. Open, Closed, or Delayed Transition. Optional Service Entrance Rated and Bypass Isolation models. All transfer switches include a microprocessor controller. Open Transition (break-before-make) is standard, but see Notes in the chart below for other available options.

Transfer Switch VAC Typical
Applications
Notes
Asco 4000 Up to
600
Industrial
Commercial,
Telecom
Delayed Transition option
Closed Transition option
Thomson
TS880SE
Up to
600
Mission Critical
Industrial
Commercial,
Telecom
Service Entry Rated
Closed Transition option
Dual Source option
Bypass Isolation option
Thomson
TS880
Up to
600
Mission Critical
Industrial
Commercial,
Telecom
Closed Transition option
Dual Source option
Bypass Isolation option
Asco 7000SE Up to
600
Mission Critical
Industrial
Commercial,
Telecom
Service Entry Rated
Delayed Transition option
Closed Transition option
Bypass Isolation option
Asco 7000 Up to
600
Mission Critical
Industrial
Commercial,
Telecom
Delayed Transition option
Closed Transition option
Bypass Isolation option

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