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Static Voltage Stabilizer
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automatic transfer switch (ATS)
Automatic Transfer Switches are an integral component in Caterpillar Generator Sets and are responsible for transferring power between Utility and Generator. Today every standby generator set that is sold requires at least one ATS, and some cases require multiple units.
Allied offers a broad range of transfer switch products that are positioned to support virtually any type of emergency power application from simple, single ATS installations to highly complex, multi-ATS/generator switchgear systems. Available in sizes ranging from 40 through 4000A, there is a CAT switch to suit every project's needs.

Overall ATS Features Include:

Open & Closed Transition
Delayed Transition
Bypass Isolation
40 through 4000A
Mechanically Held Contactor
50/60 Hz 600 V Class

Maintenance for ATS Product:

Good maintenance programs should involve all components of a generator, including the Automatic Transfer Switch. There are several reasons for regular maintenance. In some industries, it is mandatory to perform, at the minimum, a weekly load test. This basic test makes sure the ATS is capable of sending a start signal to the generator and transferring the building load onto the generator for a period of time set by the user. This simple operation ensures the basic functionality of the ATS and generator. However, it does not address other critical operations during the life of the switch.

Early Detection of Problems:

A preventive maintenance contract can help identify problems before a failure occurs. Consider, for example, power cables, contactor assemblies and interconnect wires. During the initial installation, start-up and commissioning, particular attention is given to the integrity of these components. However, after a period of time, these components can deteriorate, vibrate loose or become contaminated by the operational environment. If regular maintenance is not performed, failure could occur, causing extensive damage to the ATS, generator or downstream devices. This type of failure and resulting costs, can be prevented if the switch is under a maintenance contract.
A maintenance contract should include, but not be limited to, the factory recommendations for testing and maintenance in the back of the Cat Operation and Maintenance Manual for each switch. These basic services will ensure high reliability and prolong the life of your ATS.

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