Table of Contents
Advertisement
5.2
Bushing controls activities at the arrival
Item
Control
1
Crate inspection
2
Gas
filling
pressure and gas dew
point
3
Oil pressure
4
Bushing inspection
HVDC TRANSFORMER BUSHINGS
Description
Check for evidence of shocks on the crate
structure.
Check the status of the external shock
indicators.
residual
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
atmospheric pressure.
Check if the oil pressure ≥1 bar gauge
@20° C (see Figure 8).
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
accessories.
Table 4 – Bushing controls activities at the arrival
PHI 530.1425.2500
PHI 265.850.1500
Kepco project
dew
point
-30° C
≤
toroids
and
relevant
IS 2664 GB
Page 11 of 70
Actions on problems
Take
pictures
•
evidences.
In case of deviations
•
notify the Foreman and
the
GE
Connections
Supervisor.
Continue with the internal
•
inspection.
Record
the
•
value and the gas dew
point
In case of deviations
•
)
notify the Foreman and
the
GE
@
Connections
Supervisor.
Continue
with
•
inspection but:
Wait for instructions.
Record the pressure and
•
the
average
temperature.
In case of deviations
•
notify the Foreman and
the
GE
Connections
Supervisor.
Check for oil leakages.
•
Continue
with
•
inspection but:
Wait for instructions.
Take
pictures
•
various inspected parts.
In case of deviations
•
notify the Foreman and
the
GE
Connections
Supervisor.
Continue
with
•
inspection but:
Wait for instructions.
of
Energy
RPV
pressure
Energy
RPV
the
bushing
Energy
RPV
the
of
the
Energy
RPV
the
Advertisement
Table of Contents
