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Instruction Manual
EMU oil level indicator
7. INSPECTION BEFORE FIRST ENERGIZING
• Confirm the terminal connections to ensure
correct tightening torque on the fastening
screws.
• Confirm that there are no short-circuited
secondary terminals. If there are left open
circuits and a point connected to the
grounding terminal.
• Confirm the connection to the substation
earthing system.
• Confirm that oil level indicator is in the
green area of the display.
• Confirm the protrusion on the top on
manometer has been cut as explained in 2.3.
The CVT is tested at factory according to the
standard and does not require the repetition
of electrical tests. Check routine test reports
for more details. However, if it is desired to
carry out some measurements, check item 08
of this manual.
Although all care is taken at the factory
during oil filling, the surface around the
bellows and top cover screws can, without
risks, show small oil stains. These stains
© GE Grid Solutions
should not be confused with oil leakage if the
level indicator pointer is positioned in the
green area of the display. Clean those stains
with alcohol and confirm that there is no oil
leakage.
DO NOT REMOVE OIL SAMPLES FROM THE
CAPACITIVE DIVIDER.
NO REMOVAL OF OIL SAMPLES FOR
ANALYSIS IS NECESSARY FOR THE EMU. CVT
IS HERMETICALLY SEALED.
If necessary, EMU oil samples, small
quantities may be taken. Always check the oil
level indicator before taking the samples.
Never refill oil without consulting GE.
8. ON-SITE TESTS
If customer uses a periodic maintenance
program
that
measurements, the following tests are
recommended as a guide.
It is important to use capacitance meters that
can perform readings with a minimum
accuracy of 0.5%.
The nominal values of the capacitances
expressed in pF (pico-Farad) are recorded on
the nameplate of the CVT.
Measurements
commissioning should be kept as a reference
for subsequent measurements.
An increase of about 1% in the capacitance
values should be carefully checked, as it may
be an indication of failure of insulation of a
capacitive element.
includes
electrical
performed
during
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