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R
eplacing DC string fuses
Some inverter parts may be subject to voltages that could be hazardous for the operator.
Before performing any work on the inverter, refer to "Inverter switch-off" chapter on this manual
to know all the necessary step to safely operate on the inverter.
By only disconnecting the AC disconnect switch and the DC disconnect switch, the DC input
voltage is still present on the fuse board. Use adequate PPE (personal protective equipment).
The string protection fuses (where present) in the inverter may need to
be replaced in the following circumstances:
1. Adjustment of the fuse value on the basis of the type of PV panels used
2. Damaged fuse
Procedure for replacing string fuses from positive
on -SX, -SX2 model) string fuses board:
PVS-50-TL-SX
PVS-60-TL-SX
PVS-60-TL-SX-CN
35
1. Open any AC disconnect switch downstream of the inverter.
2. Open the DC disconnect switches
3. Disconnect the strings by disconnectiong the quick fit input connectors
.
19 20 21
4. Wait enough time for the stored energy to be discharged (min time 30
minutes).
5. Open the wiring box front cover
6. Remove the fuse to be replaced
7. Introduce the new fuse into the fuse holder on the string fuse boards
- 162 -
8 - Maintenance
or negative
35
PVS-50-TL-SX2
PVS-60-TL-SX2
34
35
15
04
(only
34
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