Power Supply
Stand-Alone Unit
1 or alternatively 2 power supplies can be used in the SWT 3000 system. They are decoupled via diodes on the
backplane. In order to detect failure of a power supply unit, the PU4 module monitors the output voltages
from Power Supplies PS-1 and PS-2. The interface modules (IFC) are supplied via the PU4.
Monitoring Loop
An inhibit loop monitors the presence of the PU4, FOM and CLE modules. Pulling the PU4, FOM and the CLE
causes the interruption of the monitoring loop and the secondary voltages from PS-1 and PS-2 (if available)
are disconnected.
i
i
NOTE
An On/Off switch (PS) on the PU4 (not accessible from outside) also interrupts this monitoring loop.
If the CLE or FOM-1 is not used, insert the jumper X41 in position 1-2.
If the FOM2 is not used, insert the jumper X42 in position 1-2.
Integrated Unit
If the SWT 3000 is used in the PowerLink system (as iSWT), the PU4 unit is supplied via the central power
supply of the PowerLink. The IFC modules are supplied via the PU4.
i
i
NOTE
It is neither required nor it is possible to use a separate power supply for the integrated unit.
2.14
2.14.1
2.14.2
Functional Description
2.14 Power Supply
92
Smart Communication, SWT 3000 Teleprotection, Equipment Manual
C53000-G6040-C605-1, Edition 03.2020