ABB BUE, Руководство по ремонту

Страница: 15 / 36

15 1ZSE 5492-129 en, Rev. 6
2.3 Motor-drive mechanism
2.3.1 Control system
Error condition Fault finding procedure
LOCAL operation or
REMOTE operation is not
possible.
1. LOCAL operation is not possible when the control
selector switch is in position REMOTE or 0, and
REMOTE operation is not possible in position LOCAL
or 0.
2. Check the power supply both for control and motor.
3. Check if the protective motor switch has been re-
leased.
4. Check if the emergency stop has been pressed.
Release by turning clockwise and reset the protective
motor switch.
5. Check if the running-through protection has been re-
leased. Reset by setting the LOCAL/REMOTE switch
to 0 and then back to previous position and after that
reset the protective motor switch.
6. If the motor-drive has been handcranked against the
mechanical endstop, handcrank back to end-position.
The on-load tap-changer
performs more steps than
ordered, or operates to-
wards the end stop. 1. Check that the maintaining contact releases after
operation.
WARNING
Dangerous voltage!
2. Check that the raise and lower contactors function
properly (see circuit diagram, Fig. 4 respectively
Fig. 6, and contact timing diagram, Fig. 5 respectively
Fig. 7).
BUE:
3. Check that the brake disc stops in its middle posi-
tion with a tolerance of ±25 degrees. For information
about how to adjust the brake, refer to the Mainte
-
nance guide.
4. Check that the starting contact fuctions properly (see
circuit diagram and contact timing diagram).
BUL:
3. Check that the roller on the brake arm stops in the
middle of the notch in the cam disc.
For information about how to adjust the brake, see
the Maintenance guide.
2. Trouble-shooting