ABB UniGear ZS1 - Page 97

97
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7. Operation of the switchgear
Note on safety at work
All relative work and operating procedures must
be carefully carried out by trained specialists
familiar with the installation, taking into account
all the relative safety regulations according to the
IEC and other relevant professional bodies, as
well as any local and work regulations and
instructions.
WARNING:
Do not walk on the top surfaces of the
switchgear panels as they contain rupture
points for pressure relief which could be
damaged!
7.1 Switching operations
WARNING:
Carry out switching operations with the front
doors closed!
Withdrawable apparatus
Manual insertion from the test / disconnected
position to the service position:
• Connect control wiring plug 2 (Figure 158)
• Close the front door
• Ensure that the apparatus is in the OFF
position
• Fit hand crank (Figure 160) on square spigot
of the spindle mechanism after opening the
aperture for them by turning slide (Figure
159)
• Turn the crank clockwise (approx. 20 turns at
12 - 17.5 kV, ...50 kA and 30 at 12 - 17.5 kV, 63
kA and 24 kV) until the stop is reached and
the withdrawable part is in the service
position
• Observe the position indicator
• Remove hand crank
It must be noted that the spring loaded pin head
will lie completely on the rear side of the panel
door when the hand crank is moved from square
spigot of spindle mechanism. This ensures that
the rear part of the pin head has been shifted
onto the hexagonal cap of the spindle and
prevents unintentional wrenching of the spindle
during panel service. Wrenching may lead to the
circuit breaker blocking.
Note:
The withdrawable part must not be stopped in
any intermediate position in the travel range
between the service and test / disconnected
position!
Manual withdrawal from the service position into
the test / disconnected position:
• Ensure that the apparatus is in the OFF
position
• Reverse the procedure described above for
insertion into the service position
Figure 158:
1 Interlock
2 Control wiring plug
3 Control wiring socket
Figure 159:
Control wiring plug connector
blocked to prevent disconnection with the
withdrawable part in the service position
Before inserting the hand crank,
it is necessary to open the aperature for it