Maintenance
Maintenance plan
G51--001EN07
17/18
02--2011
© ALSTOM 2010. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be
relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is
provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is
strictly prohibited.
GRID
Replacing the mechanical interruptor switch controls
Checking the direc-
tion of rotation
Note the supply voltage of motors on the operating mechanism terminals.
Conditions valid for mechanisms fitted to the earthing switch(es).
D
Direction of operating mechanism rotation
-- Check that all keys required for unlocking are present.
-- Using the crank, place the operating mechanism in intermediary position
between fully open and fully closed.
-- Give an opening order locally by a brief impulse on the opening push--
button situated in the control cubicle and interrupt IMMEDIATELY power
supplies to the motor and monitoring control.
Caution
THE INTERRUPTION OF ELECTRIC POWER SUPPLIES MUST BE IM-
MEDIATE. IF THE APPARATUS OPERATES IN THE OPPOSITE DIREC-
TION TO THE ORDER GIVEN : RISK OF SERIOUS DAMAGE TO EQUIP-
MENT AND DANGER FOR PERSONNEL WORKING ON IT.
-- Check that the operating direction corresponds with the order given.
-- If the disconnector operates in the opposite direction to theorder given, ex-
change two of the motor supply wires at arrival in the control cubicle.
D
Operating
Check that the disconnector is operating correctly by performing a series of
5 opening--closing sequencesby means of the local electricoperating mecha-
nism.
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