ABB VD4 Series Instruction manual - page 11
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4
Operation of the switchgear
Note on safety at work
• Theswitchgearmayonlybeoperatedbyspe-
cially trained personnel who are familiar with the
characteristics of the particular device.
• Observetherelevantinstructionsinsection1.2.
• Due to safety reasons, the circuit-breaker has
to be treated as “switched on” if the switching
position can not be clearly determinated.
In this case all high voltage connections to
the breaker have to be de-energized and zero
potential on the primary side of the breaker has
to be confirmed prior to commissioning, opera-
tion, maintenance or repair work.
4.1
Commissioning
4.1.1 Preparatory work
(Figures 3/1 and 3/3)
In preparation for commissioning, the following work
should be carried out prior to connection with the
high-voltage power supply:
• Checkthegeneralconditionoftheswitchgear
for detrimental circumstances of all kinds.
• Perform a visual examination of the switching
devices, withdrawable parts, isolating contacts,
insulating parts, etc.
• Checktheconnectionofthemainearthingbar
with the station earthing conductor (DIN VDE
0141).
• Checkthepaintworkfordamageandtouchup
as described in section 5.4 where necessary.
• Removeallmaterialresidues,foreignbodiesand
tools from the switchgear.
• Clean the switchgear, rubbing down insulating
parts with a clean, soft, non-fraying and dry cloth.
Remove greasy or adhesive dirt as described in
section 5.3.
• Properly refit all covers, etc., removed during
assembly and testing processes.
• Transport caps (13.9) on the poles of vacuum
circuit-breakers, where fitted, must be removed.
• Liftinglugs(13.13)forhighcurrentcircuit-break-
ers, if still fitted, must be removed.
• PerformACvoltagetestingonthemaincircuits
to VDE 0670, Part 6 (IEC 60298) as far as neces-
sary. Pay special attention during this pro cedure
to voltage transformers and cables etc.
• Turntheauxiliaryandcontrolvoltageon.
• Carry out test operations of switching devices
manually or by electrical control, and simul-
taneously observe the relevant position indica-
tors.
• Check mechanical and electrical interlocks for
effectiveness, without using force.
• Set the protective devices in the panel to the
required values, and check their functioning with
test equipment.
• Onmotor-drivenwithdrawableparts,checkthe
direction of rotation of the travel motors as de-
scribed in section 5.5.5.
• Foranyfurtherquestionsonthefunctionsofthe
withdrawable circuit-breaker part and its testing,
see section 5.5.
• Instructthelocaloperatorsinthefundamental
details of regular handling of the switchgear.
• Checkontheoperationalreadinessandswitching
status of upstream and downstream electrical
installations.
From areas bordering on the switchgear, in accor-
dance with responsibilities, check on the following
where applicable:
• Powercables
• Auxiliarycables
• Supplyvoltagesource
• Remotecontrol
• Entire earthing installation, according to DIN
VDE 0141
• Switchroomequipment
• Switchroomcondition
4.1.2 Start-up
• Complywithallrelevantsafetyregulations.
• Ensure that the circuit-breakers and switch
disconnectors in the switchgear are in the OFF
position.
• Removeanyexistingearthingandshort-circuiting
connections in the critical switching area.
• Energizethefeedcables.
• Connecttheswitchgear,step-by-step,observing
the signals and indicators.
• Checkthattherelevantconductorsareinphase,
as far as necessary when several incoming feeder
cables and switchgear sections are concerned.
• Carryoutallmeasurementsandcheckallfunc-
tions dependent on the high voltage power supply
being connected.
• Watchoutforirregularitiesofanykind.
4.2
Switching operations
Perform switching operations with the front doors
shut.
4.2.1 Withdrawable circuit-breaker part
(Figures 3/1, 3/4, 4/1 to 4/4)
Manual insertion from the test/disconnected posi-
tion to the service position:
• Connectcontrolwiringplug(10.2).
• Closethefrontdoor.
• Ensure that the circuit-breaker is in the OFF
position.
• Fit the crank (121) on square spigot (18.1) of
the spindle mechanism (18).
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