ABB PVS-60-TL-US Product Manual page 144

7. Remove the DC quick fit connectors
• Using the current clamp check the absence of current on DC side,
measurement each positive and negative DC input string cables
(check the correct setting of the current sensor).
• Remove all quick fit DC connectors using the dedicated disconnect
tool. To avoid mechanical interferences, use a cable tie to collect the
disconnected cables.
It is highly recommended to put labels on the cables in order to easily reconnect them to the
correct connectors once completed the service activities.
8. Discharge of the capacitor
• Wait the internal capacitors to be discharged. The discharge time of
the stored energy is indicated on the regulatory label.
9. Open the wiring box cover
• Access to the wiring box by removing the front cover
• Visually inspect the components to identify the presence of any
overheating, signs of electric arcs, failure of the insulating devices,
loosen connections or cables not connected.
10. Voltage absence test on DC side
Before to approach the below operations all the steps from1 to 9 included must be successfully
completed.
Using the voltage detector, check the absence of voltage on the DC
terminal connectors
• Each positive input and ground
• Each negative input and ground
• Positive input and negative input of each input section of the inverter.
between:
12
PVS-60-TL-US
+ CH1
- CH1
- 144 -
8 - Maintenance
09
.
04
downstream DC Switch
+CH1 / +CH2 / +CH3
downstream DC Switch
Earth
Ground
N A B C
-CH1 / -CH2 / -CH3