LORCH V50 - DK-PWRUP Board; PWRUP Board Functions, Measurements, and Fuses

page 20
Pc-board DK-PWRUP
The pc-board DK-PWRUP is the power-up circuit of the machine.
Functions
- reducing start-up peak current for capacitors
- supply and safeguarding of control transformer
Measuring Points
designation measure point result
mains input L1 X5 ~
400V ACmains input L2 X6 ~
mains input L3 X7 ~
mains output L1 X1 ~
400V ACmains output L2 X2 ~
mains output L3 X3 ~
supply voltage control transformer X10/1
X10/2
~
~
400V AC
drive level relay X4/1 and 3
X4/2 and 4
+
-
+24V DC
Picture Pc-board DK-PWRUP
Fuses
Safeguarding the control transformer via Si1, Si2 : each 4A, 400V (slow)