คุณสมบัติทางเทคนิค | UPS specification

Category: STS - Source Transfer Switch
Model Name: STS for 50 Amp Single Phase

Model Number: STS1050

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Features

- 1 Phase in - 1 Phase out / 50Amp 19" Rack Mountable 2U, Depth : 360mm

- Uninterruptible transfer between the independent sources

- Synchron/asynchron transfer feature

- "In flight" transfer mode

- RS232/RS485 communication facilities

- Source priority selection

- Automatic and Manual transfer in case of failure on both sources

- Module replacement without interruption under load

- Fast Diagnostic Response with microprocessor controller

- Internal (2 pcs) mnual bypass

- Easy Maintenance availability

- Current Distortion level less than 1%

- High Efficiency

- Transfer to the second source in less than 5 ms in case of over low/high voltage values

Product Descriptions

SYSTEM DESCRIPTION
Static Transfer Switch is a single phase, two pole semiconducter power switch, which can switch between to syncronious AC sources without interrupting the output power less than 1/4 cycle. Because it is fully static, it doesn’t have any moving parts like fans and relays, and can transfer the power via thyristors.

OPERATION THEORY
The primary task of a Static Transfer switch is to continiously supply the output with uninterrupted energy, even when one of the feeding input sources fails. One source of the Static Transfer Switch is called as preferred source, where the other source is called as alternate. Supplying the output through the preferred source has the priority, it means, if bout sources are available and withing acceptable limits, preferred source will be chosen. If any problem is detected on the preffered source, the load is transferred to the alternate source within less than 1/4 cycle. It is adjustable, which source is designated as preferred and which is alternate.

There source be no back-feed during the supply of the load, it means, in any transfer, sources should not be allowed to clash. Otherwise, it is possible that both sources will be unavailable. (example, shorting outputs of two independent operating UPS’s)

*คลิกดูเทคนิค Source Transfer Switch (STS)