Static Transfer Switches

What are Static Transfer Switches?

Static transfer switches have a ultra-fast switch between synchronised input power supplies, allowing uninterrupted power for your critical load. This means you don't have the need to shut down the system for maintenance. An STS switch consists of three main components:

1. Controls and metering
2. Silicon-controlled rectifiers
3. Breaker assemblies and bypass switches

Are Transfer Switches needed?

UPS transfer switches are an essential bit of equipment to protect against power source failures. They automatically transfer power from the "preferred" source to an alternate or backup source in the event of a source failure, ensuring true power continuity. A static transfer switch guarantees smooth operation of your critical load by monitoring two power supplies and automatically switching to the alternative supply if the preferred source is compromised. With its high reliability, the STS switch detects power failure and switches within milliseconds.

How do Static Transfer Switches work?

Our STS transfer switch can be configured to use source A or B as the primary/preferred supply for the critical load. If the selected source fails, the STS automatically transfers to the alternative source. Once the primary source is restored, the STS can be set to automatically re-transfer the load back to the preferred source using a timer, or it can await manual operation.