SIPLUS PSU (6DL3500-8BA)
SIPLUS PSU Power Supply Unit
A5E00854207E
26 of 30
Copyright (C) Siemens AG 2018
V 8.00 released
2018-05-03
Turn the auxiliary power supply unit off, connect it at the clamp L1/L2 and at the free M clamp and
switch it on again.
The current limitation must not be in action. The output voltage must show a stable value of 30 V.
Otherwise there is a defect of the feeder diodes.
Step 3: Checking of the Feeder Diode at L1 potential in inverse direction
Disconnect the supply cable at L1, strain the clamp L1 with a resistor of 1 kΩ (≥ 1 W) to M and
measure the reverse current of the L1 feeder diode through the load resistor (see figure 20).
The reverse current must not exceed 10 mA.
Connect the supply cable to L1 again.
L1 L2
M
M
M
M
L1 L2
L1/L2
SIPLUS PSU
Einspeisekabel
Zum Nachbarschrank
30 V / 60 A
I
1k Ohm / 1W
IRL1
Figure 20: Checking the feeder diode in reverse-biasing
Note
:
The supply cable at L2 must be connected during the whole test step for the supply of
the neighbor cabinet!
Step 4:
Checking of the Feeder Diode at L2 potential in Reverse-Biasing
Disconnect the supply cable at L2, strain the clamp L2 with a resistor of 1 kΩ (≥ 1 W) to M and
measure the reverse current of the L2 feeder diode through the load resistor (analog to figure 20).
The reverse current must not exceed 10 mA.
Connect the supply cable to L2 again.
Note
:
The supply cable at L1 must be connected during the whole test step for the supply of
the neighbor cabinet!
Supply cable
To neighbor cabinet
