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Быстродействующие АВР (STS)
DC cистемы для телекома
DC системы для промышленности
DC/DC конверторы
Инверторные системы
Аккумуляторные батареи
Дизель генераторные установки
Тиристорные регуляторы Thyro
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Быстродействующие АВР (STS) / /

Modern data and telecommunication systems require a power supply with maximum reliability and availability.AEG_STS_02.jpg(small)
Down-times are not acceptable nowadays , even during maintenance the redundancy has to be ensured. The Protect STS offers the possibility to switchover between two independent AC power

Protect STS provides an effective solution for redundancy:

• Complete seperation of the two power sources including associated input lines
• Separation of the load to protect against mutual disturbances
• Supplies loads from two sources (e.g. UPS which are different power ratings and types)


Static Transfer Switches (STS) are designed to transfer supply between independent one-phase or three-phase AC power sources. Unlike traditional automatic transfer switches (ATS), STS provides 20 times faster load transfer (typically 1/4 of a cycle), which ensures the uninterrupted operation of even the most sensitive electronic equipment. Load retransfer to preferred input source is virtually instantaneous (typically 100 μs).The basic applications of STS are in automatic systems for the power industry, computer and telecommunication centres, automation and security systems of ‘intelligent’ buildings as well as other equipment which is highly sensitive to supply interruption. It’s high overload capacity and transfer algorithm enables rapid fuse blowing during short-circuits. As a consequence the voltage immediately returns to normal value to supply other loads. The built-in transient voltage surge suppression system for SCR switches provides additional protection against damage to supplied devices.

Control Panel

All Protect STS are equipped with LED indicators and control panel. Three buttons on the Control Panel determine the current operation mode: OPERATION, RETRANSFER and PREFERRED SOURCE.

The STS operates in one of the following three modes:

Preferred source mode

The selected preferred source supplies the load. The load is transferred
to the other source if the voltage of the preferred source is
outside acceptable range.

Automatic retransferring mode

After a transfer triggered by disturbances in the preferred source,
the load is transferred again to the preferred source with a delay
(time is set by DIP switches) if the preferred source is healthy again.

Manual mode

Connections are set manually (not automatically)

Краткое описание









Rated input voltage

3 x 400 Vrms phase to phase



Acceptable changes of input voltages

-25% +20%







Acceptable changes of frequency

-9% +6%



Voltage surge withstand

<1.5 kV

<1.0 kV

limp 15 kA 8/2011s hmp 5 kA 8/20 ps


Voltage insulation

AC 2 kV 60 s





cos (ɸ) > 0.8


Nominal output current

63 A, 150 A, 250 A, 400 A 2 poles

63 A, 150 A, 250 A, 630 A, 1000 A 3 poles

63 A, 150 A, 250 A, 630 A, 1000 A 4 poles

63 A 2 poles, 3 poles and 4 poles as 19 inch rack version


Maximum crest factor



Power factor cos (ɸ)


lag, lead


Voltage surge withstand

<1.5 kV

<1.0 kV

For Iimp 15 kA 8/20 μs

For Iimp 5 kA 8/20 μs


Overload capacity






t=1 h

t=5 s

t=0.4 s

t=0.2 s

t=20 ms


Short-circuit strength of thyristros witches

3 kA/20 ms

8 kA/20 ms

15 kA/20 ms

28 kA/20 ms

ln-63 A

In-150 A

ln-250 A, 400 A

ln-630 A


Fuse interrupting capacity

50 kA


Preferred source selection

Primary source or

Secondary source

With retransfer or without retransfer after disturbance clears


Remote preferred source selection

Primary source or

Secondary source

Remote relay selection for preferred source


0ver voltage level setting


+9 %




Transfer is performed when voltage value crosses the level Programmed by DIP switch selection


Under voltage level setting


-12 %



-24 %

Transfer is performed when voltage value crosses the level. Setting by DIP switch


Phase delay limit for synchronised lines






Setting by DIP switch


Switching interlock for output over current

3 In

4.5 In

6 In

7.5 In

9 In

No interlock

Setting by DIP switch


Manual transfer time for synchronised lines of a phase error within the limits

<0.2 ms



Automatic transfer time for synchronised lines of a phase error within the limits

< 6 ms



Transfer delay in manual or automatic mode without synchronisation

13 ms

17 ms

25 ms

50 ms

Setting by DIP switch


Retransfer to preferred line delay with both lines operational

0.9 s

1 s

8 s

25 s

Setting by DIP switch [both lines healthy)


Failure alarm


fuse failure overload over temperature internal STS failure


Disturbance alarm


primary source not healthy secondary source not healthy lack of synchronisation transient voltage surge suppresses alarm manual control ON automatic retransfer OFF


Manual ON


service operation


Retransfer OFF


retransfer to preferred line is not performed


Primary source OK


indicating if primary source в healthy


Secondary source OK


indicating if secondary source is healthy


Primary source ON


indicating if primary source is active


Secondary source ON


indicating if secondary source is active


Maximum operational voltage

300 VDC or 2S0 VAC



Maximum current

4 A for 220 VAC 02 A for 220 VDC







Operating temperature

0 to 40° С



Storage temperature

0 to 40° С




max 98%

Without condensation


Maximum altitude

1000 m




Natural Forced with built-in fan redundancy

For In=63 A

For In=150 A, 250 A, 400 A, 630 A


Acoustic noise

Below 55 dBA








Class В

EN5S022. EN605SS-2.3