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Static Transfer Switches

Three Phase

Power Supply Security

Features:

• Ultra fast Break Before Make switching eliminates connecting

the two sources together even under fault conditions

• Less than 5ms transfer between synchronised sources

• Selectable preferred source

• A fuseless rugged, high reliability SCR device eliminates fuse

replacement

• Digitally controlled system set points

• Programmable synchronised and unsynchronised transfers

• Switched neutral option maintains isolation between sources

• Diagnostics and transfer tests to verify system readiness

• Load overcurrent transfer inhibit to prevent transfer of a fault to the

second source

• Dramatic increase in reliability and availability of critical devices

• Redundant cooling fans

• Integral isolated maintenance bypass sustains power to the load

even during maintenance and repair

• LCD display and keypad for messages, alarms, measurements,

diagnostics and settings of the parameters from the front panel

• RS232 bi-directional communication to provide monitoring and

setting of the STS via a PC

• 7 available dry contacts

Technical Speciﬁcation

Model STS325 STS350 STS3100 STS3150 STS3200

Voltage 230/400VAC 4 wires

Frequency 50 or 60Hz +/-5%

Voltage Distortion <10%

Input

Current 25A 50A 100A 150A 200A

Voltage 230/400VAC 4 wires

Overcurrent Inhibit LCD front panel, MBP Standard

Output

Dimensions w x d x h (mm) 570 x 500 x 1415

RS232 Port Standard

Dry Contacts 7 dry contact outputs

Switched Neutral Optional

Ambient Temperature 0° - 40° C

Humidity 0 – 95% (non condensing)

Standards EN50091-2 class A ISO9001

AC/AC Efﬁciency >98%

Transfer Time <5m sec. Within CBEMA & IEEE for synchronised sources: <11m sec. For unsynchronised sources.

Transfer is always Break Before Make

Overload 150% for 15min. 1000% for 40m sec

General

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