Posts Tagged ‘automatic transfer’

How to Select an Automatic Transfer Switch (ATS)

January 5th, 2016 | 5 Comments | Posted in Panel Building
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megaphone1To begin year 2016, we’re glad to publish this article by a new member from Kenya, specialized in electrical installations, maintenance and repairs.

He told us about his experience (20 years!) and he kindly sent us this article about automatic transfer switches. We tought it was interesting and decided to post it on the blog.

Remember you too can send us material and be published in the Electical Engineering Community blog! Just send us a mail.

For now, let’s enjoy this article…

The automatic transfer switches are used to automatically transfer the load from the utility power to a secondary or backup power source whenever power goes out, or as required.

A careful selection of the switch ensures adequate capability, safety, and maximum reliability under both normal and emergency conditions. As such, one must consider technical factors such as the size, type of load, continuous current rating, voltage rating and style. In addition, the price, compatibility and reliability must be considered.

Automatic Transfer Switch & their types

September 24th, 2013 | Make a comment | Posted in Panel Building
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Today Nasir’s sent us the 4th part of his tutorial on Transfer Switches. Let’s read!

An automatic transfer switch switches the power between grid and backup sources automatically without human intervention. It wouldn’t be vague to say that a backup generator is totally useless without automatic switching sources these days.

Automatic Transfer Switch 1

They are much like voltage monitors that monitor incoming power much like a thermostat and a soon as the power level falls below certain threshold specified by the user it turns on the backup power.

They are mostly used to switch between:

  1. One generator to another: Systems that use multiple generators as the prime power source.
  2. Utility power to generator: These including facilities that have both utility and income power and uses generators for backup only.
  3. One utility power to another utility power: Systems operating utility feeds on both ends. These systems can operate with manual switches as well.
  4. A three way system including all above: These systems combine two utility sources and one backup generator for sensitive areas like jails and military bases.

    These are mostly referred as dual stand by systems having two backup and over all three power sources.


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