3 Phase Static Transfer Switch
The STS is built with two independent power inlets. The load normally runs from the primary source. If the primary source fails, the secondary source...
View SpecificationsThe Range
Models In This Category
Who It Is For
Buyers Who Specify This Category
Typical Buyers
- Data centre and server room operators
- Telecom and broadcast sites
- Process plants with critical control cabinets
Industries We Supply
Problems Solved
What This Equipment Is Brought In To Fix
- A single utility feed drops and the connected equipment reboots
- Mechanical changeover contactors are too slow for IT and process loads
- Manual switch back to the primary feed after a fault is forgotten or delayed
Core Advantages
Where The Specification Actually Differs
- Transfer time of 6 ms or less between source A and source B
- Automatic return to the priority source once it is restored
- SCR switching with break before make sequencing
- Efficiency of 98 percent or better across the range
- Ratings from 63 A to 400 A per phase in one product family
Application Scenarios
Where These Units Are Installed
- Dual feed server rooms
- Redundant supply to PLC and control cabinets
- Backup transfer ahead of a UPS bank
FAQ
Questions Buyers Ask
How fast does the switch transfer between sources?
Typical transfer time is 6 ms or less, which is short enough that connected IT equipment keeps running without a reboot.
Which source has priority?
Input source A is the priority source. When source A fails the switch moves the load to source B, and it moves the load back once source A is restored.
What current ratings are available?
Standard models cover 63 A, 100 A, 160 A, 250 A, 300 A and 400 A per phase at 3 phase 380 V.
Specify Static Transfer Switch With An Engineer
Send the electrical data and the site constraints. We will confirm the model, the enclosure and the protection settings.