Static Transfer Switch

Static Transfer Switch

The microprocessor-controlled static transfer switch constantly monitors the sources connected to the inputs; checks whether they remain within the current and frequency limits and decides if they are synchronized with each other. If the prioritized source is within the determined limits, critical load is transferred over to the prioritized source. If the prioritized source is not within the determined limits, load is then transferred to the other source which is within the determined limits.

STATIC TRANSFER SWITCH
Topology	Thyristor controlled transfer switch
Nominal Voltage	220/230/240 VAC 1 Phase 380/400/415 VAC 3 Phase
Nominal Frequency	50Hz / 60 Hz
Overloading Capacity
between 100% – 125%	10 min.
between %125 – 150%	5 sec.
Transfer Management	Make before break
Synchronous Transfer Time	< 5 msec. ( ¼ cycle at 50 Hz)
Asynchronous Transfer Time	< 11 msec.
Other Controlled Transfers	0 msec.
Efficiency	>99%
Protection	Over temperature Protection, MCB Protection at Source Inputs , Overvoltage Protection at Source Inputs
Front Panel Indications and Warnings	Synchronization Failure (Light), Asynchronous Transfer Enabled (Light), Prioritized Source Preference (Light), Input Source Fault (Light and Sound), Over current (Light and Sound), Over temperature (Light and Sound), Thyristor Failure (Light and Sound)
Buttons	“Asynchronous Transfer Enable” Button, “Manual Transfer Enable” Button, “ Reset” Button,

STATIC TRANSFER SWITCH

Topology

Thyristor controlled transfer switch

Nominal Voltage

220/230/240 VAC 1 Phase 380/400/415 VAC 3 Phase

Nominal Frequency

50Hz / 60 Hz

Overloading Capacity

between 100% – 125%

10 min.

between %125 – 150%

5 sec.

Transfer Management

Make before break

Synchronous Transfer Time

< 5 msec. ( ¼ cycle at 50 Hz)

Asynchronous Transfer Time

< 11 msec.

Other Controlled Transfers

0 msec.

Efficiency

>99%

Protection

Over temperature Protection, MCB Protection at Source Inputs , Overvoltage Protection at Source Inputs

Front Panel Indications and Warnings

Synchronization Failure (Light), Asynchronous Transfer Enabled (Light), Prioritized Source Preference (Light), Input Source Fault (Light and Sound), Over current (Light and Sound), Over temperature (Light and Sound), Thyristor Failure (Light and Sound)

Buttons

“Asynchronous Transfer Enable” Button, “Manual Transfer Enable” Button, “ Reset” Button,

SAFETY & ENVIRONMENT
Protection Level / Color	IP 20 / RAL 7035 (Standard), (Higher IP rating and different colors are available, please consult)
Enclosure Material	Mild Steel, Zinc-phosphate coated; 100 µm electrostatic paint; 1.5 mm thickness
Cooling	Forced Fan (Standard) / Natural (OPTIONAL)
Cable Entry	Bottom (Standard) / Top (OPTIONAL)
Operating Temperature	-10 / +40 °C. (Higher operating temperatures are available, please consult)
Relative humidity	5 – 90 %
Operating Altitude	Max. 1000 Mt. (Higher altitudes requires de-rating, please consult )
Noise Level	Max. 60 db

SAFETY & ENVIRONMENT

Protection Level / Color

IP 20 / RAL 7035 (Standard), (Higher IP rating and different colors are available, please consult)

Enclosure Material

Mild Steel, Zinc-phosphate coated; 100 µm electrostatic paint; 1.5 mm thickness

Cooling

Forced Fan (Standard) / Natural (OPTIONAL)

Cable Entry

Bottom (Standard) / Top (OPTIONAL)

Operating Temperature

-10 / +40 °C. (Higher operating temperatures are available, please consult)

Relative humidity

5 – 90 %

Operating Altitude

Max. 1000 Mt. (Higher altitudes requires de-rating, please consult )

Noise Level

Max. 60 db

Static Transfer Switch

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