ABB ACH480 Manuel - Page 14
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14 Reforming the capacitors
3. Make this reforming circuit and connect it to the DC terminals of the converter module.
Disconnect
U
x
U
x
Voltage
200 V < U
< 240 V
×
380 V < U
< 415 V
×
380 V < U
< 500 V
×
525 V < U
< 690 V
×
4. Switch on the AC power supply of the reforming circuit for the time defined in section
Reforming time
5. Switch off and disconnect the AC power supply of the reforming circuit.
6. Wait for 5 minutes (10 minutes for wind turbine converters) to let the converter DC
capacitors discharge.
7. Measure that the voltage of the DC terminals of the converter is close to 0 V.
8. Disconnect the reforming circuit from the converter.
A
SUPPLY
SUPPLY
UNIT
W1
V1
U1
SKD 82/16
SKD 82/16
SKD 82/16
SKD 82/16
on page 9.
U
U
x
x
C
R
UDC-
UDC+
DRIVE MODULE
FREQUENCY
CONVERTER
Recommended components
A
R
220 Ohm / 700 W
220 Ohm / 700 W
470 Ohm / 1200 W
680 Ohm / 1700 W
INVERTER
INVERTER
UNIT
W2
V2
U2
C
22 nF / 2000 V
22 nF / 2000 V
22 nF / 2000 V
22 nF / 2000 V