EN
108
• Using a Philip screwdriver, unscrew the blocking screw (B) on the
AC protective shield
(27)
.
• Open the sliding cover (A) as shown in the picture and block it in
open position using the blocking screw (B). The opening of the
sliding cover will open the 6 holes that make accessible the VAT
points on the AC connection busbar
(21)
.
27
A
B
• Perform VAT by inserting the voltage detector in the holes. With
reference to below picture, the right holes are designated for the
insertion of the voltage detector (in YELLOW) while the left holes
(in BLUE) are designated as visually inspection holes, to make
sure the electrodes of the voltage detector are touching the main
AC screws on the AC connection busbar
(21)
.
PVS-100_120-TL_B2_S(X-Y)
R
S
PE
T
N
Check sequence
First point
Second point
Check #1
R (L1)
PE
Check #2
S (L2)
PE
Check #3
T (L3)
PE
Check #4
N
PE
Check #5
R (L1)
S (L2)
Check #6
S (L2)
T (L3)
Check #7
T (L3)
R (L1)
Check #8
R (L1)
N
Check #9
S (L2)
N
Check #10
T (L3)
N
• At the end of VAT close the sliding cover
(A)
. This means that the
hole (in the yellow circle) on the AC protective shield
(27)
must
be closed.
27
A
8.2.4.12 Voltage absence test on bulk capacitors (Power
Module)
WARNING –
B
Before to approach the below operations
all the steps from 1 to 11 included must be successfully
completed.
• Access to the power module box
(01)
by opening the power
module front cover
(54)
(refer to paragraph
).
• 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.
• Check the absence of voltage on the bulk capacitors using the
voltage detector. The voltage absence test on bulk capacitors must
be carried out on the DC interconnection board
(59)
.
PE
PVS-100_120-TL_B2_S(X-Y)
59
The layout of the DC interconnection board
(59)
is provided
below, with reference of the points where the input DC voltage
absence test must be performed.
Check sequence
First point
Second point
Check #1
+BULK
PE
Check #2
-BULK
PE
Check #3
+BULK
-BULK
+BULK
-BULK