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HVDC TRANSFORMER BUSHINGS
PHI 530.1425.2500
PHI 265.850.1500
Kepco project
IS 2664 GB
Page
11
of
70
5.2
Bushing controls activities at the arrival
Item Control
Description
Actions on problems
1
Crate inspection
Check for evidence of shocks on the crate
structure.
Check the status of the external shock
indicators.
•
Take
pictures
of
evidences.
•
In case of deviations
notify the Foreman and
the
GE
Energy
Connections
RPV
Supervisor.
•
Continue with the internal
inspection.
2
Gas
filling
residual
pressure and gas dew
point
Check gas pressure:
0.11 MPa abs
≤
Gas pressure
≤
0.125 MPa abs
(0.1 bar gauge
≤
Gas pressure
≤
0.25 bar gauge
)
Check gas dew point
≤
-30°C @
atmospheric pressure.
•
Record
the
pressure
value and the gas dew
point
•
In case of deviations
notify the Foreman and
the
GE
Energy
Connections
RPV
Supervisor.
•
Continue
with
the
inspection but:
Wait for instructions
.
3
Oil pressure
Check if the oil pressure
≥
1 bar gauge
@20°C (see
Figure 8
).
•
Record the pressure and
the
average
bushing
temperature.
•
In case of deviations
notify the Foreman and
the
GE
Energy
Connections
RPV
Supervisor.
•
Check for oil leakages.
•
Continue
with
the
inspection but:
Wait for instructions
.
4
Bushing inspection
Check the integrity of the oil side cone.
Check the bottom terminal and the
MultiContact blades.
Check the flange and the gas and oil
pressure gauges.
Check the oil expansion vessels, the oil
pipes and all oil valves.
Check the wiring and the electrical circuit.
Check the integrity of the valves warranty
seals and red warning tags.
Check for oil leakages.
Check the status of the composite insulator
and the silicon sheds.
Check the top terminal.
Check
the
toroids
and
relevant
accessories.
•
Take pictures of the
various inspected parts.
•
In case of deviations
notify the Foreman and
the
GE
Energy
Connections
RPV
Supervisor.
•
Continue
with
the
inspection but:
Wait for instructions
.
Table 4 – Bushing controls activities at the arrival
Содержание PHI 265.850.1500
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