25
D I S T R I B U T I O N S O LU T I O N S
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10. Putting into service
• Only use the supplied operating lever
• All the operations for putting into service must
be carried out by our personnel or by the
customer's sufficiently qualified personnel with
detailed knowledge of the apparatus and
installation
• If the operations are obstructed, do not force the
mechanical interlocks but check that the
operating sequence is correct
• Before opening the door, always check the
position of the feeder disconnector and earthing
switch by means of the mechanical signals and
through the relative windows
• Only energize the switchgear with the apparatus
open and the doors closed
• Do not put the equipment into service if the test
result is negative. Consult us if necessary
The inspections are only acceptable if all the listed
tests have terminated with a positive result
Perform the operations in the following table before
putting the switchgear into service.
After the operations described above have
terminated, make sure that everything has been
restored to its original conditions.
Inspections prior to putting into service
Inspected part
Operations
Notes
Cubicles
Visually check inside and outside the cubicle to make sure that
there is no evident damage. Remove any foreign bodies (e.g.
tools, test connections inadvertently left in place after
installation).
Carefully clean the insulating parts. Remove all traces of
moisture and dust with a clean, dry cloth.
Make sure that all screws have been properly tightened.
Check that all end plates and those included in the
configuration have been installed correctly.
Make sure that all panels for protection against accidental
contact have been installed correctly.
Check that the interlocks function correctly and that the keys
(if any) are correctly joined with a welded ring if they are
required for the interlocks.
Check that the mechanical operating mechanisms can be
operated by applying ≤ 200 Nm moment of force.
Check the mechanical signals and through the windows to
make sure that the apparatus is positioned properly.
The force interlocks withstand 400 Nm
maximum moment of force.
Power circuit connections Make sure that the connections are well tightened.
Earthing busbar and
relative connections
Check tightness and continuity.
Check earthing efficiency in
accordance with the accident-
prevention regulations
Insulation
The applied voltage test is performed in the factory. After
installation, it is not required by the CEI 17-6 Standards.
If the user considers it necessary, it must be performed at a
value equal to 80% of the value indicated in point 8.1.
of Standard IEC 62271-1 and only in alternating current.
Keep the MV cables disconnected during the test.
Example:
– 24 kV rated voltage of switchgear
– Required test voltage 50 kV for
approx. 1 min (performed in factory)
– Test voltage after installation 0.8 x
50 = 40 kV
for 1 min.
Circuit-breaker, feeder
disconnector, earthing
switch and operating
mechanism
Carry out several operations on each apparatus to make sure
that this latter and the interlocks operate correctly.
Make sure that the apparatus and locks
function correctly
(see sect. 5.4 - sect. 6.0)
Auxiliary circuits
Check that the spring loading motor and opening and closing
coils function correctly.
Содержание UniSec DY800
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