72
4 Operations on switch disconnector
4.3
Use of 3D operating mechanism
This operating mechanism is energy stored. In order to carry out the operation 2 described after-
wards, it is necessary to charge the springs in advance. See the indicator F (Fig. 50) on the following
page to know the status of the springs:
- yellow colour = charged springs (A)
- white colour = discharged springs (B)
To charge the springs, insert the operating handle in A (Fig. 50) and turn it clockwise 180°. When
the indicator F changes from white to yellow, withdraw the operation handle from A. To carry
out the operations 1, 3 and 4 it is not necessary to charge the springs in advance. The operating
mechanism has three positions : CLOSED (1), OPEN (0), EARTH ( ).
(A)
(B)
Operation
Procedure
First position
Final position
PUT
TING INT
O SER
VICE
1
Earth
Open
• Close the door. (See the instruc-
tions concerning the module)
• Unlock the keylock “earthing switch
closed” E (in case it is present)
• Insert the operating lever in B and
turn it clockwise
2
Open
Closed
• Unlock the keylock “switch open” C
(in case it is present)
• Charge the springs as described
above and turn the command
device G clockwise.
The springs remain charged for the
operation 3
PUT
TING OUT OF SER
VICE
3
Closed
Open
• Turn the command device
G anti-clockwise; the springs
will be discharged and the switch
will open
4
Open
Earth
• Unlock the keylock “earthing switch
open” D (in case it is present)
• Insert the operating lever in B and
turn it anti-clockwise
• Open the door. (See the instruc-
tions concerning the module)
Содержание QMT Series
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