
IG-322-EN version 03; 22/07/2022
31
General instructions
SF
6
-insulated circuit-breaker panel:
Type
gae
.630 -1LSV(G)-/5/
in modular extensible design up to 24 kV, 20 kA
Technical description
4.7. Three-position switch
The disconnector and earthing switch is a three-position
switch. Its schematic design can be seen in Figure 4.6.
The technical design of the three- position switch is simple
and reliable. The switching positions ON-OFF- EARTHED
can be switched with only one switching element (pair of
switching blades).
Each pair of switching blades is borne on a support and
connected to the earthing contacts of the switching shaft
by a coupling rod. The fixed device contacts are connected
to the circuit-breaker by means of copper conductors.
The pair of switching blades for each phase slide to the
corresponding contact, depending upon the switch
position.
In order to guarantee a long service life for the switching
elements, the blades and contact elements are made of
arc- resistant, low-wear material. Due to their design, the
switching blades’ contact rivets have a dry lubrication effect
and prevent the blades from being welded to the contacts
if a short circuit occurs.
37250316
3
2
1
b
c
d
e
f
g
a
a
Copper conductors
b
Device contact
c
Switching blade
d
Earthing contact
e
Coupling rod
f
Switching shaft
g
Support
Figure 4.6.
Содержание ORMAZABAL gae.630
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