ORTEA SpA MAT200 aug21
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7.3 MAINTENANCE ACTIVITIES
7.3.1 Generalities
WHAT TO DO HOW WHY
Clean transformers and all electro-
mechanical components removing
dust, dirt and rust
Dry compressed air
Dry cloths
Dust accumulation may limit the cooling air flow and
cause overheating.
Rust may compromise the dielectric properties of
materials and components.
Check the correct tightening of the
transmission units connections
DO NOT use lubricants
for the regulator
contacts
Transmission units improperly connected may
cause irregular operating and abnormal wear and
tear of components
Check that the electrical connections
are tight
Tightening tools
Improper electrical connections may cause localised
overheating and consequent major failure of the unit
Clean the air inlets at the base of the
enclosure
Dry compressed air
Dust accumulation may limit the cooling air flow and
cause overheating.
7.3.2 Roof fans
WHAT TO DO HOW WHY
Check that the airflow coming out from
the turrets is regular.
Keep clean the air outlets and the fans.
Dry compressed air
Dry cloths
may limit the cooling
air flow and cause
overheating.
If necessary, replace defective fans.
Warning: the fans are controller by the
ambient thermostat. Before
proceeding with the replacement,
check the temperature threshold that
determines the activation.
disconnect the fan plug;
unscrew and remove the turret from the cabinet
roof;
replace the defective fan with an original spare
one;
connect the fan plug;
re-position the turret on the roof
Failure of one or more
fans may compromise
the air circulation
inside the enclosure.
7.3.3 Columnar voltage regulator
In a columnar regulator the copper track is wound helicoidally on a cylinder. The mobile contacts move vertically on the
track thanks to a pinion and chain transmission.
WHAT TO DO HOW WHY
Clean the copper
surface in case of
clear oxidation or
deposit of graphite
dust.
Fine abrasive paper (120 type first and 240 type
afterwards)
Dry compressed air
Dry clean cloth
The presence of residual material or
oxide on the copper where the rollers
run may cause deterioration of the
rollers themselves and overheating.
The phenomenon is self-supplied so
as time goes by, the regulator may
suffer major failure.
Clean and possibly
lubricate the chain
Grease or spray for cogs and chains
Ensure the correct movement of
transmission units and avoid
interruption of the transmission or
failure.
Check the chain
tension.
When manually applying force
on the chain side, the
displacement should be twice
the thickness of chain.
The pulling chains tension must be
such that there are no loosening or
interruptions during the inversion of
the rotating sense.
if necessary, adjust
the chain tension.
GEARMOTOR
ADJUSTING
SCREWS
GEARMOTOR
ADJUSTING
SCREWS
Lift or lower the
plate supporting the
gearmotor by
means of the fixing
bolts and nuts
2x
x
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