AEG 8000012364 BAL User Manual

"UniVert 2" inverter 

 

Page 15 of 42 

8000012364 BAL, en 

Its electronic high-performance components make the SBS highly 
overload-resistant and thus capable of quickly eliminating load short 
circuits. 

 

The SBS can be used as the central SBS for parallel operation of up 
to 8 INVs. 

 

Another outstanding characteristic of the SBS is its communication 
capability with other systems via integrated interfaces. 

The control electronics of the SBS have been designed on the basis 
of state-of-the-art microcontroller technology. By using parameters in 
the software, the main unit characteristics are determined. 

 

SBS set

Control unit

AC

Load

DOU

U = 231V

   I = 10.3A

 

Figure 3 Block diagram of the SBS    

The main components of the SBS are (Figure 3): 
• Thyristor set 
• Control unit 
• DOU 
Figure 3 illustrates the principle of an SBS. 

In normal operation, the SBS is not fired, the load is supplied "Online" 
by the INV or INVs. If the supply of the load is no longer guaranteed 
by the INVs or the load voltage has dropped below a permitted value 
due to a load short circuit, the load is switched over to the mains 
without interruption. 

 

Apart from power cabling, a bus line is required for the SBS for 
process control purposes between the INV/INVs and the SBS. The 
bus line has to be terminated at both ends with a resistor.