PERIOD
CHECKED
OBSERVATION
HERMETIC
CONSERVATOR
Weekly
Weekly
Oil Level
Level Checking
x
Monthly
Dehydrating Breather
Silica Gel Colour
Annually
x
Hermetic Protection Relay
Gas Generation
x
Annually
Buchholz Relay
Gas Generation
Annually
Annually
Gaskets, Radiators/
Corrugated Walls
Loosening and Oil Leakage
Every 3-5 Years
Every 3-5 Years
Cable Box
Physical Situation and
Connections
Once a Month
Once a Month
Bushing
Damage Failure,
Cleaning and Oil Leakage
Annually
Annually
Earthing
Connection and Resistance
Every 6 Months
Every 6 Months
Terminal Connection
Oxidation and Loosening
Every 3-5 Years
Every 3-5 Years
Requirement of Painting
General View
Annually
Annually
Thermometer
Switch on
x
Every 3-5 Years
Conservation Tank
Oil Leakage
Every 2 Years
Annually
Oil
Oil Dielectric Test
All periodical controls are listed as a table below.
Table 3:
Periodical Check
• Pressure relief device (T-10) must never be painted. Painting can cause adhesion of
rotary rod and string pull, which can cause malfunctioning of pressure relief device. In case
of any rise of pressure, tank can be seriously damaged.
• Annually, transformer and functioning of accessories should be deeply inspected.
Inspection should be started from periodically recorded temperature and pressure
information. If there is no
change in temperature and pressure values (even due to seasonal
temperature and load), malfunctioning
of accessories or misreporting must be suspected.
• For gasket replacing due to stiffening an aging, get in contact with the manufacturer.
Ulusoy Distribution Transformers Maintenance, Operation, Installation and Instruction Manual