116
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8. Commissioning
8.1 Preparatory work
In preparation for commissioning, the following
work must be carried out:
• 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 "9.5
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 "9.4 Servicing".
• Correctly remount all covers etc. removed
during assembly and testing procedures.
• Transport caps on heavy duty vacuum circuit-
breakers if applicable - must be removed.
• Lifting eyebolts on high current vacuum
circuit-breakers must be removed if still
fitted
• Preparatory works for SF6 circuit-breakers:
-Clean the insulating parts with clean dry
cloth
-Check that the upper and lower
terminals are clean and free of any
deformation caused by shocks received
during transport and storage
-It is advisable to check the SF6 gas
pressure
• In switchgear panels with an additional
ventilation system – flap hanging in partition
must rest loosely against leaf spring (with
the centrifugal fan at a standstill, if fitted).
To check:
• Insert a suitable screwdriver through
opening 4 (Figure 188) in horizontal partition
1 and into bracket 3 on flap 5.
• Swing flap 5 upwards and allow it to rest
loosely again on leaf spring 2.
• If the flap is in the locked position, use the
screwdriver to press leaf spring 2 downwards
by approx. 5 mm to release the lock before
swinging the flap.
• If any centrifugal fans controlled in relation
to primary current are fitted, also check that
these function correctly.
On motorized withdrawable parts, check the
direction of rotation of the travel motor. For any
other matters regarding operation of the
withdrawable circuit-breaker part and testing
facilities for the withdrawable part.
In case the switchgear has Monitoring and
Diagnostics equipment, no particular
comissioning of the equipment is needed
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.
Caution:
• The check is only successful if all the tests in
agreed scope have been passed successfully
• Check wiring of secondary side of
instrument transformers
• If the inspection gives negative results,do
not put the apparatus into service but, if
necessary, contact ABB’s Customer Service
Department
• Only energise the switchgear with all the
withdrawable parts in the test position and
with the circuit-breaker open
Figure 188:
1 Horizontal partition
2 Leaf spring
3 Bracket
Side view. Fitting of horizontal
partition with additional ventilation. The internal
flap is shown in the service position (open).
4 Inspection aperture
5 Flap
6 Centrifugal fan
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