LEGRAND LE06499AE, Инструкция по установке, использованию и техническому обслуживанию

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In normal operating conditions cast resin transformers do not require specific maintenance except for that indicated in
the following table. All the operations performed must be recorded in order to be shown to Legrand in case of necessity.
Take advantage of any stops to perform checks even before they are due.
8. Maintenance
8.1 Indicative table on the main maintenance operations
Pos. Control activity Frequency of checks Tools to be used Result
1
Correct operation of the
temperature sensors
Pt100 / PTC
Every 6 months and
after exceptional events
Heat blower for
simulated heating
/ multimeter
probe resistance
measurement and
comparison with
calibration table*
Normal behaviour of the different
temperature sensors
2
Correct operation of the
temperature control
device
Every 6 months and
after exceptional events.
Hot air tool for
simulated heating
Simulated alarm and trip
Follow the instructions given in the installation manuals
3
Cleaning of the windings
from dust, dirt, grease and
possible foreign bodies
Yearly. If the
environment is
particularly dusty, the
frequency must be
adequately increased
Clean, dry compressed
air, maximum pressure
3 bar Dry rag
The ventilation gaps between the
windings must be completely clean
and open
4
Cleaning of the windings
from condensation
After a period with no
applied voltage
Dry cloths and dry
compressed air at low
pressure, max 3 bar
/ heating up to 80°C
with industrial heat
blowers / energising
without load for at
least one day
External and internal surfaces of the
windings perfectly dry
5
Tightening of the bolts
of HV and LV terminals
and of all the electrical
connections
Yearly / after
exceptional events
Torque wrench
Tightening torque according to
paragraph 5.4
6
Measurement of
insulation resistance to
earth of the windings
After a period with no
applied voltage
Mega-ohmmeter
(Megger)
See the paragraph 6.5
7
Verify that each couple
of LV and HV windings is
perfectly aligned
After exceptional events
such as accidental
shock or short circuit
downstream of the
transformer.
Flexometer Uniform centering
8
Tightening of the upper
spacer
Yearly / after
exceptional events
Torque wrench Tightening torque between 20 and
40 Nm
9
Tightening of mechanical
parts and fixing to the
floor
Yearly / after
exceptional events
Torque wrench
Tightening torque according to
paragraph 5.4