Appendix-3: Description Of Ups And Block Diagram - LEGRAND KEOR T 208V 40 KVA Installation Manual

Appendix-3: Description of UPS and Block Diagram

Name Definition
Q1 Common Mains Supply Circuit Breaker
Q2 Output Circuit Breaker
Q3 Maintenance Bypass Circuit Breaker
Q4 Auxiliary Mains Supply Circuit Breaker
F5 Battery Fast Fuse
Q6 Inrush Circuit Breaker
F1 Rectifier Fast Fuse
F2 Inverter Fast Fuse
KREC Rectifier Contactor
KINV Inverter Contactor
KBYP* Backfeed Contactor (shunt trip)
X1 Common Mains Supply Terminals
X2 Output Terminals
X4 Auxiliary Mains Supply Terminals
In case any inverter fault occurs; Bypass thyristors transfer the supply of the load electronically from inverter to Auxiliary
BYPASS THYRISTOR
Mains Supply without any interruption.
RECTIFIER The rectifier generates a very constant DC voltage level by drawing current from the input with a power factor close to 1.
INVERTER The inverter generates a very constant AC voltage level at the output by using DC voltage source at the rectifier's output.
BATTERY Supplies the necessary energy when the mains voltage is not available.
KEOR T
43