Source Changeover Switches

Static Transfer Switches

Designed & Manufactured by STATIC POWER, Australia

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Overview of Static Transfer Switches (STS)

Our solid-state Static Transfer Switches (STS) are precision-engineered to protect sub-cycle sensitive loads by executing transparent, break-before-make transfers between redundant power sources. Unlike mechanical Automatic Transfer Switches (ATS) designed for raw utility-to-generator switching, our STS units utilize Silicon-Controlled Rectifiers (SCRs) to eliminate mechanical degradation and achieve transfer speeds under 4 milliseconds invisible to critical IT, medical, and industrial equipment. From 16A DIN-rail units for edge automation to 1600A centralized systems for heavy infrastructure, the iSTS range guarantees mission-critical power path redundancy.

Sub-Cycle Source Transfers | Ultra-High Reliability (>800,000 MTBF)

Broad Capacity Range: Comprehensive models spanning from 16A rail-mounted units up to 1600A centralized facility switches.
Ultra-Fast Digital Detection: Continuous source monitoring with digital fault detection in <1 millisecond.
Sub-Cycle Synchronous Transfers: SCRs execute Break-before-make zero current transfer in <4ms (1/4 cycle), guaranteeing zero dropped loads.
Dynamic Asynchronous Transfers: Algorithms safely manage these transfers to prevent saturation and dangerous inrush currents in motors or transformers.
Built-in Transient Voltage Protection: Delivers system reliability and safety
Exceptional Reliability: Secure maximum uptime with MTBF exceeding 800,000 hours across most models, with the iRack A1 surpassing 1,000,000 hours.
High-Level Interfacing: Seamless integration into Building Management Systems via MODBUS TCP, SNMP, HTTP, and integrated web servers.
Some units have fuseless design: Enhances safety, reliability, and simplifies maintenance
Product Make: STATIC POWER

Frequently asked Questions(FAQ)

What is a Static Transfer Switch (STS)?

A Static Transfer Switch (STS) is a solid-state electrical device that ensures continuous power to critical loads by seamlessly switching between two independent AC power sources without interrupting the load.Unlike traditional Automatic Transfer Switches (ATS) that rely on slow, mechanical moving parts, an STS utilizes Silicon-Controlled Rectifiers (SCRs) or thyristors to manage the power path. This solid-state architecture allows the STS to detect upstream power anomalies in under 1 millisecond and execute a "break-before-make" transfer, typically in less than a quarter-cycle (under 5ms). Because this transfer happens far faster than the hold-up time of standard power supplies, sensitive IT equipment, medical devices, and industrial automation networks remain fully operational without rebooting or experiencing data loss.

What is the difference between an ATS and an STS?

How fast does the Static Transfer Switch actually operate?

What kind of maintenance does the STS require?

How do you perform maintenance on an STS without dropping the critical load?

What environments require a fuseless STS design?

What are the benefits of using an STS in data centers or healthcare applications?

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