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UNISEC DY800 - E D. 4 - ACCORDING TO E- DISTRIBUZIONE SPECIFIC ATIONS
- INS TA LL ATI ON M A NUA L
—
11. Routine inspections
• The routine inspections must be performed by
our personnel or by the customer's personnel so
long as they are sufficiently qualified and
possess detailed knowledge about the apparatus
• Before proceeding with any operation, always
make sure that the apparatus is in the open
position with the springs discharged
• Before opening the door, always check the
position of the feeder disconnector and earthing
switch by means of the mechanical signals
• The apparatus is guaranteed to be maintenance-
free for the first 36 months from delivery
11.1 General information
During normal service, the switchgear is
maintenance-free. Any interventions required
basically depend on the severity of the service
conditions, i.e. on various different factors such as
the frequency of the operations, the interrupted
current values, the relative power factor and the
installation site.
For precautionary reasons, an inspection schedule
is given in the table in the following section, along
with the frequency with which the equipment must
be checked. It is advisable to comply with the
indications in the table for the first interventions.
Optimal time limits for carrying out successive
operations can be established on the basis of the
results obtained during the routine inspections.
It is advisable to record all the operations
performed in detail on a maintenance card and
service book, along with the date, description of the
fault and reference data allowing the device to be
identified (see chap. 2).
Refer to article 11 of standard IEC 62271-1 if further
details are required. Do not hestitate to call us if
problems arise. It is always a good idea to inspect
the apparatus (screw and bolt tightness - abnormal
heating, etc.) a few months after it has been put into
service.
The following table gives the indicative frequencies
with which inspections should be made.
Do not put the apparatus into service if
the test result is negative.
Call us if necessary
11.2 Inspection schedule
Part liable to
inspection
Inspection
frequency
Operation required
1 Perform a
few
mechanical
closing and
opening
operations
3 years
Make sure that the operating
and transmission levers
function correctly.
The apparatus must operate
regularly without stopping in
intermediate positions and
the applied torque must not
exceed 200 Nm
2 Visual
examination
of the
insulating
parts
3 years, or
depending on
the degree of
pollution in
the
environment
The insulating parts must be
free from any built-up dust,
dirt, cracks, traces of surface
discharges or damage
Remove the dust and dirt
with a vacuum cleaner and
clean, dry cloths
3 Auxiliary
contacts
5 years
Make sure that operation and
the signals are correct
4 Auxiliary
circuit
conductors
5 years
Check whether any of the
wiring fasteners is slack or
broken and make sure that
the connections are well
tightened
5 Interlocks
5 years
Make sure that the devices
function correctly (sect. 5.4 -
6.0)
6 Measurement
of the
insulation
resistance
5 years
See sect. 10 (table)
7 Operating
mechanism
3 years
Check that the operating
mechanism is clean
Содержание UniSec DY800
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