8.1 Preparation
In preparation for commissioning, the following
work must be carried out prior to connection
with the high voltage power supply.
•
Check the general condition of the switchgear
for any damage or defects
•
Visually inspect the switching devices,
withdrawable parts, isolating contacts,
insulating parts, etc.
•
Check connection of the main earthing bar to
the installation earthing conductor (following
the appropriate safety regulations)
•
Check the paintwork for damage and, where
necessary, touch up as described in 9.4
Repairs
•
Remove all residues of materials, foreign
bodies and tools from the switchgear
•
Clean the switchgear, rubbing down
insulating parts with a soft, dry, clean,
non-fraying cloth. Remove any greasy or sticky
dirt as described in 9.3 Servicing
•
Correctly remount all covers etc. removed
during assembly and testing procedures
•
Perform AC voltage testing of the main
circuits according to IEC where necessary. Pay
special attention to voltage transformers and
cables, etc. during this procedure
•
Switch the auxiliary and control voltage on
•
Carry out testing operations on switching
devices manually or by electrical control, and
simultaneously observe the relative position
indicators
Pressure relief duct
•
Check mechanical and electrical interlocks for
effectiveness, without using force
•
Set the protective devices in the switchgear
to the required values and check their
function with test equipment
•
Check readiness for operation and switching
status of electrical systems upstream and
downstream of the switchgear
•
Instruct local operators regarding the basic
details of regular handling of the switchgear
Warning!
If the inspection gives negative results,
do not put the apparatus into service
but, if necessary, contact ABB’s
Customer Service Department.
8.2 Measurements and tests
Tests at site are mandatory prior to energization
of the switchgear.
The main purpose of site tests in general is to
make sure the switchgear is ready for energization,
not to repeat the factory testing and confirm
the factory results.
For manufacturer’s recommendation of test scope
and method please contact ABB’s Service
Department.
After performing the tests, make sure that all
normal service conditions are restored.
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8 Commissioning
44
U N I G E A R Z V C
M E D I U M V O L T A G E P R O D U C T S
—
8/1 Schematic
diagram of the
pressure relief duct
—
8/1