Connect Through Disconnect Emergency Rack Out; Installation Of Withdrawable Circuit-Breakers - ABB VM1 Installation And Service Instructions Manual

5.7. Connect through disconnect
emergency rack out (Fig. 9)
1. In the case of a locking magnet –RL2 fault, in an
emergency the truck can be racked out manually following
the instructions below:
a. Open the circuit-breaker
b. Verify Close/Open Indicator shows OPEN
c. cut off the power supply to the auxiliary circuit
d. verify "READY" indicator lamp turns off and wait 10
minutes.
e. open the enclosure door
f. remove the circuit-breaker front protection shield
g. using the manual lever, carry out an emergency racking
out operation, keeping the moving anchor of the locking
magnet –RL2 pressed down by means of a screwdriver
during the initial stage of racking-out (Fig. 9).
fig. 9
5.8. Installation of withdrawable circuit-
breakers
The withdrawable circuit-breakers are preset for use in Vesta
switchgear or PowerCube modules.
For racking-in/racking-out of the switchgear: connect the
auxiliary circuits thereby supplying the locking electromagnet
in the truck, fully insert the crank handle (1) (Fig. 8) in the
appropriate seat (2) (Fig. 8) and work it clockwise for racking-
in, and anti-clockwise for racking-out, until the end-of-run
positions are reached (see par. 5.4. - 5.5- and 5.6.).
Circuit-breaker racking- in/-out must be carried out gradually
to avoid shocks which may deform the mechanical interlocks
and the end-of-runs.
The torque normally required to carry out racking- in and
racking-out is <25 Nm.
This value must not be exceeded. If operations are prevented
or difficult, do not force them and check that the operating
sequence is correct.
to CoMPlete the RaCking-in/out
oPeRation, about 20 tuRnS of the CRank
handle aRe RequiRed .
when the CiRCuit-bReakeR haS ReaChed
the ConneCt/ diSConneCt PoSition
it Can be ConSideRed aS RaCked into
the SwitChgeaR and, at the SaMe tiMe,
eaRthed by MeanS of the tRuCk wheelS.
withdRawable CiRCuit-bReakeRS of the
SaMe veRSion, and theRefoRe with the
SaMe diMenSionS, aRe inteRChangeable.
foR the CiRCuit-bReakeR inStallation
oPeRationS, alSo RefeR to the teChniCal
doCuMentation of the above-Mentioned
SwitChgeaR.
the RaCking-in/out oPeRationS MuSt
alwayS be CaRRied out with the CiRCuit-
bReakeR oPen.
note
Caution
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