13
15kV Class Padmount VisoVac™
instruction manual
MN024004EN April 2021
Sequence of operations – V3 Style Switchgear
Load way operation example
The following sequence of operations shows the energized and de-energized state of the gear as each operation is
completed. Note the example assumes switchgear is fed from a single source. Source way (SW-1) not shown is CLOSED. All
other ways on the gear (VFI-1+) are considered VFI load ways and are shown. Example assumes no load side sources and all
load ways are switched similarly.
In this position, the vacuum interrupter and visible isolation
rods are CLOSED. The grounding position is OPEN and the
isolation rod is energized. This example assumes all ways
are energized. See
Figure 29
.
WARNING
The cables connected to all bushings, any control power
sources or stored energy devices such as capacitors
must be de-energized/discharged before gear is
considered de-energized .
LOAD BUS
SW-1
Source
VFI-1
VFI-2
VFI-3
Loads
Figure 28 . MODEL 9-V3 Single Line Diagram
Load Bus
Isolation Rod
CLOSED
Ground
ROD
OPEN
Loads
VFI-1+
CLOSED
Figure 29 . V3 style padmount – Source and load ways
CLOSED
In this position, the vacuum interrupter is OPEN and visible
isolation rods are CLOSED. The grounding position is OPEN
and the isolation rod is energized. This example assumes
all load ways (VFI-1+) are de- energized and there are no
load side sources. The source way SW-1 is closed. See
Figure 30
.
WARNING
The cables connected to all bushings, any control power
sources or stored energy devices such as capacitors
must be de-energized/discharged before gear is
considered de-energized .
Load Bus
Isolation Rod
CLOSED
Ground
ROD
OPEN
Loads
VFI-1+
OPEN
Figure 30 . V3 style padmount – Source way CLOSED
and load ways OPEN
