Alstom GL314 - Page 128

Maintenance
Replacing the operating device FK3--1
L51--800EN/04
2/12
04--2004
E ALSTOM
Safety measures
Circuit--breaker
general preparing
Thetablebelowgivesthestepstopreparethecircuit--breakertoworksafely :
Step Action Comment
1 Isolatethecircuit--breakerfrom
the network.
Shut down the circuit--breaker ,
de--energize and earth it.
2 Switch--off the supply circuit of
the reloading motor .
3 Check the SF
6
pressure gas. Make sure that the SF
6
pressure
gas is ³ p
me
(P2).
Below this level, no mechanical
operating is allowed.
Release the springs
The table below gives the procedure to release the closing spring and the
opening spring depending the circuit--breaker state :
NOTE
: For the manual discharge of closing spring, see in annexes,
the module “Manual operations” 48.020.181E.
If the circuit--breaker
position is ...
Action
Closed
In the operating device, activate the
opening handle and the closing han-
dle like below :
1 -- Open
2 -- Close
3 -- Open
Open
Activate the closing handle and the
opening handle like below :
1 -- Close
2 -- Open
Continued on next page.