Instruction Manual
© GE Grid Solutions
13
If possible, GE suggests disconnecting
the equipment to perform the following
examinations:
1)
Insulator:
Depending
on
the
pollution level, it is necessary to
clean the porcelain;
2)
Metallic components: check for
corrosion;
3)
Tightening torque of primary and
secondary
connections.
Any
adjustments shall be conducted as
described in the item
“Primary
Terminals”
of this document;
4)
Secondary terminal box: If necessary
clean inside the terminal box.
5)
Verify oil level indicator and if there
is any signal of oil leakage;
6)
Remove the top cover to have access
to the bellows and verify if there is
any signal of oil leakage near the
fixation of the bellows and / or if the
bellows is in good condition.
Tests
It is recommended after the first few
hours of operation and whenever there
is a change in the primary current (in the
bar
connection),
performing
the
measurement of the primary terminal
temperature with a proper temperature
measuring instrument.
It is advised to perform the following
tests before putting the equipment in
operation and thereafter at four-year
intervals depending on availability of
the:
1)
Ratio (TTR);
2)
Polarity (Polarity meter);
3)
Saturation Voltage (ac voltage
source, Voltmeter and Ammeter);
4)
Ohm
Resistance
(Wheatstone
bridge);
5)
Insulation Resistance with any
megohmmeter;
6)
Tan
δ
of the HV insulation (Double
M4100, Omicron CPC100 or any
equivalent).
Important remark:
During commissioning and tests, it is
recommended recording the results
acquired in the tests abovementioned.
In case of doubts, please contact the
technical assistance support of GE: +55
35 3629 7042 or 7038 or 7000
10.
PROPER DISPOSAL OF
TRANSFORMERS COMPONENTS
AFTER LIFESPAN
The instrument transformers are mainly
composed of the following components,
which after
transformer’s
lifespans
require a properly disposal in order to
prevent environmental contamination.
Components
Recommended
Disposal
Metallic materials
Metal recycling
company
Resin and
materials
saturated with
resin
Oil disposing
company properly
licensed to perform
such activity
Oil (PCB-free)
–
classified as Class I
hazardous residue
Oil disposing
company properly
licensed to perform
such activity
Material
contaminated with
oil
Co-processing or
incineration at a
company properly
licensed
Porcelain insulator Industrial landfill
properly licensed
