Automatic Transfer Switch Wiring Diagram

Automatic transfer switches (ATS) are used to protect critical loads from power outages by automatically transferring them to a backup power source, such as a generator. ATSs are typically installed in commercial and industrial settings, but they can also be found in homes and other small businesses.

ATSs are available in a variety of sizes and configurations, and they can be wired in a variety of ways. The specific wiring diagram for an ATS will depend on the type of ATS, the type of backup power source, and the electrical requirements of the critical loads.

In this article, we will discuss the basic wiring diagram for a simple ATS. This diagram will show you how to connect an ATS to a generator and a set of critical loads.

Wiring Diagram

The following diagram shows the basic wiring for a simple ATS. The ATS is connected to a generator and a set of critical loads. The ATS is also connected to a utility source, which is the normal source of power for the critical loads.

1. Utility Source

The utility source is the normal source of power for the critical loads. The utility source is connected to the ATS at terminals L1, L2, and L3.

2. Generator

The generator is the backup power source for the critical loads. The generator is connected to the ATS at terminals G1, G2, and G3.

3. Critical Loads

The critical loads are the loads that are protected by the ATS. The critical loads are connected to the ATS at terminals 1, 2, and 3.

4. ATS

The ATS is the device that automatically transfers the critical loads from the utility source to the generator in the event of a power outage. The ATS is connected to the utility source, the generator, and the critical loads.

5. Transfer Switch

The transfer switch is the part of the ATS that actually transfers the critical loads from the utility source to the generator. The transfer switch is controlled by a microprocessor that monitors the status of the utility source and the generator.

Operation

In the normal operation, the ATS is connected to the utility source and the critical loads are powered by the utility source. If there is a power outage, the ATS will automatically transfer the critical loads to the generator. The ATS will remain connected to the generator until the utility source is restored.

When the utility source is restored, the ATS will automatically transfer the critical loads back to the utility source. The ATS will remain connected to the utility source until there is another power outage.

Conclusion

This article has provided a basic overview of the wiring diagram for a simple ATS. This diagram can be used as a starting point for more complex ATS wiring diagrams. If you have any questions about ATS wiring, please consult with a qualified electrician.


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