GE SF6 - Page 30

Description and operation
Operating d evice of circuit- breaker
GE Information L14- 005EN/05
4/6
11- 2016
Operating principle
Warning
OPERATION AUTHORIZED ONLY IF THE OPERATING DEVICE IS CON-
NECTED TO THE CIRCUIT BREAKER.
THE CIRCUIT BREAKER MUST NOT BE OPERATED AT A SF
6
PRES-
SURE GAS LOWER THAN THE MINIMAL PRESSURE FOR THE INSULA-
TION p
me
.
Closing
D When the closing coil is energized or the manual closing lever is operated,
the closing latch (14) releases the inertia flywheel (8).
D The closing shaft (7) effects a 180 rotation generated by the loaded clos-
ing spring (9).
D The cam (10) rotates the main shaft (1) by means of the lever with roller
(11). After a 60 rotation, the lever (5) rests on the opening latch (6).
D Simultaneously, the opening spring (3) is loaded by means of the chain (34)
activated by the rotation of the lever (33).
D A freewheel, installed on the gear wheel (19), avoids the reducing gears
(13) and the motor (12) being driven by the gear wheel of the inertia flywheel
(8).
NOTE
: A mechanical device (not shown) prevents all closing opera-
tions if the circuit- breaker is already in the “CLOSED” position.
Diagram
27
11
10
34
22
13
8
9
12
19 14
6
3
1
28
7
5
24
33
Continued on next page.