ABB V-Contact VSC7/P

35
6.2. Racking the VSC/P contactor in
and out
• Should operations be carried out with the
contactor racked-out of the switchgear,
pay great attention to the moving parts.
• The contactor must only be racked into
the unit in the open position. Racking-in
and racking-out must be gradual to avoid
shocks which might deform the mechanical
interlocks.
Fig. 15
– In the case of a fault in the motor during a racking-in or
racking-outoperation,thetruckcanbetakentotherun
endmanuallyinanemergency,firstcuttingoffthevoltage
to the motor power supply circuit and then using the
manuallever(Fig.15)tooperateinthesamewayasforthe
manual truck.
–Insertthemanualracking-inlever(Fig.15)inthespecial
coupling(B-Fig.14b).
The torque needed to carry out truck handling is < 25 Nm.
Checks:
a) clockwise rotation of the motor during circuit-breaker
racking-in.
b) anti-clockwise rotation of the motor during circuit-breaker
racking-out.
– Remove the manual crank.
Note
Bymeansofthechaintransmission,truckhandlingcarried
out with the manual lever causes rotation of the truck motor
rotorwhich,behavinglikeagenerator,cancausereversal
of voltage at the connection terminals. This can damage
thepermanentmagnetofthemotor,thereforeallthetruck
racking-in and racking-out operations carried out with
the manual lever must be done with the motor circuit de-
energized.
6.2.1. Contactor with manual truck
For the racking-in and racking-out operations of the manual
contactor,refertothefollowingmanuals:
– PowerCube PBF fixed part – code: 1VCD600530
– PowerCube PBE and PBM module - code: 647652001
– UniGear ZS1 switchgear – code: 1VLM000363.
6.2.2. VSC/P contactors with motorised withdrawable truck
Carry out the racking-in/out test of the motorised truck in the
samewayasforamanualtruck,followingtheinstructions
below:
– Rack the contactor into the switchgear in the open position.
Motor power supply circuit de-energized.
– Supply the truck motor circuit with power.
– Activate the command for the electrical racking-in
operation.Whenracking-inhasbeendone,checkcorrect
changeover of the relative auxiliary contact.
–Afterwards,activatethecommandfortheelectricalracking-
outoperation.Whenracking-outhasbeendone,check
correct changeover of the relative auxiliary contact.
NEPSI.COM - Northeast Power Systems. Inc.