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I N S TA L L AT I O N A N D O P E R AT I O N M A N U A L
—
Fig. 10.
5.
After completing all assembly operations related
to the installation of the disconnector in the
switchgear, 20 switches should be performed for
checking the cooperation of the mechanisms, and
then inspected to check if any faults did not appear
and the assembly requirements specified in p.4 are
fulfilled. Particular attention should be drawn to the
correct achievement of the fixed (closed and open)
positions and the signaling of these positions
by auxiliary switch. The condition of protective
covers need to be checked as well as condition of
insulators and correct tightening of screw connec-
tions – especially terminals. In case of noticing any
irregularities that can not be removed, the repair
should be ordered to the manufacturer.
Before switching on the supply voltage, it is neces-
sary to perform measurements and electrical tests
in the range prescribed in the instructions for com-
missioning power equipment.
6.
—
Warning: During carrying out all kind of works
Fig. 10.
nearby live high voltage apparatuses one must
The way of connecting
the auxiliary switch with
strictly follow all relevant safety regulations. Not
the disconnector
following these regulations may lead to serious
1) Rod
injuries or death.
2) Lever
3) Auxiliary switch
4) Pin
5) Pin
3
4
Commissioning of disconnector
Operating procedure
1
6.1
Disconnector equipped with NRWO4-3
manual drive
In close state of disconnector the drive le-
ver should be directed upwards. If the drive is
equipped with an electromagnetic or manual inter-
lock, it must be unlocked before operating. After
unlocking, the drive lever should be turned down
about 170° to the stop, causing opening of the dis-
connector. When closing the procedure is similar,
with the movement of the lever in the opposite
direction. After each operation of switching, it is
necessary to lock the drive, and only then the next
steps related with operating the switchgear can be
started. Pay attention to ensure that the switching
is done with firm movement. If the hand lever can
not be moved from the end position, this indicates
the drive is locked by electromagnetic interlock.
6.2 Disconnector equipped with HE manual
drive
Insert the maneuver lever onto the end of the drive
shaft and pull back the locking ring. Turn counter-
clockwise to open the disconnector. By turning the
lever clockwise, close the disconnector.
15
2
5
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