ABB VUBB, Руководство пользователя

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1ZSC000562-AAL en | User’s guide VUBB 29
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WARNING
Small amounts of explosive gases are constantly
discharged from the breathing devices (dehydrating
breather or one-way breather). Make sure that no
open fires, hot surfaces or sparks are present in the
immediate surroundings of the breathing devices.
CAUTION
The hand crank must not be inserted during electrical
operation.
The pressure relay is a calibrated monitoring
instrument. It must be handled with care and
protected against careless handling or any kind of
mechanical damage.
If a power supply failure occurs during operation,
the interrupted operation will be completed once the
power returns.
If the tap-changer is not at its exact position and the
hand crank is pulled out, the motor-drive mechanism
will start and go to the exact position if the power
supply is on.
4.1 Synchronization between tap-changer and motor-drive
mechanism
1. Loosen the multi-hole coupling. Turn the shaft first to the
end-position on one side, and then to the end-position on
the other side. Finally, turn halfway back. See Fig. 61.
4. Operation
2. Check which two holes of the upper multi-hole coupling
flange coincide with two holes of the lower multi-hole
coupling flange of the motor-drive mechanism. See
Figs. 58 (BUL) and 59 (BUE).
3. Fit two screws and locking nuts in the two multi-hole
coupling holes that best coincide. Tighten the screws.
Tightening torque 10 Nm ±10 %.
4. Pull down the protective tube. See Fig. 62.
Fig. 61. Turning the shaft between end-positions.
Fig. 62. Pull down the protective tube.
Fig. 63. Clearance at the bottom of the tube.
Fig. 64. Secure the hose clip.
To allow draining from the protective tubes, the amount of
clearance at the bottom of the tube is important:
5. Make sure that the clearance at the bottom of the tube is
between 3 and 5 mm. See Fig. 63.
6. Secure the tube with the hose clip. See Fig. 64.
3 - 5 mm