5.4.5. Opening operation from closed position
1.
Move the black slider in the grey area to the left, as
before (this releases the lever access so the switch-
disconnector can be disconnected).
2.
Opening operation
a. Manual operation
(B driving mechanism).
Insert the lever in the switch access (grey area),
move the actuating arm to the end and turn
anti-clockwise 90º.
b. Motorised operation
(BM driving mechanism).
Activate the corresponding operation command.
When, for any reason, the motor stops halfway through
a motorised operation, before restarting it you must
finish the operation manually, so that the whole
mechanism: sensors, controllers, etc. are in a reliable,
effective and logical position for the control system of
the motorised unit when it is switched back on.
Figure 5.14.
Lever turn process
3.
Verify that the cubicle is in isolating position.
Figure 5.15.
Switch-disconnector open
IG-078-EN version 12; 23/04/2020
55
General Instructions
cgmcosmos
: Medium-voltage cubicles with full insulation
in SF
6
gas up to 24 kV in accordance with IEC Standard
Recommended sequence of operations
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