HVDC TRANSFORMER BUSHINGS
PHI 530.1425.2500
PHI 265.850.1500
Kepco project
IS 2664 GB
Page
67
of
70
Appendix 7 – Bushing installation check list
Bushing type:__________________________________________________________
Bushing Serial Number:__________________________________________________
Substation:____________________________________________________________
Date
Prepared
Checked
Item Description
Activity
Limits / recording
Action on problems
Date
Signature
1
Controls at the arrival
Check the wooden crate status.
No great damages outside.
Take pictures and inform GE Energy
Connections RPV
Check the external visual impact recorder(s).
No intervention of the devices.
Take pictures and inform GE Energy
Connections RPV
Open the crate and inspect packaging and goods inside.
No visible damages on goods.
Take pictures and inform GE Energy
Connections RPV
Check the pressure of the gas inside the bushing and the 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)
Dew point
≥
-30°C at atmospheric pressure
Contact GE Energy Connections RPV
Check that the oil pressure is
≥
1 bar @20°C, record the bushing avg. temperature
Verify the absence of oil leakages from the bushing.
Pressure and temperature recording
At oil gauge: _________ bar gauge
t
avg
: _________ °C
In case of pressure not in line wth the
diagram pressure / temperature
Figure 8
or
evidence of oil leakages contact GE Energy
Connections RPV
Check the composite insulator status, the top terminal and the relevant accessories.
No damages.
Take pictures and inform GE Energy
Connections RPV
Check the oil side cone, the contact springs and the relevant accessories
No scratches
No damages
Contact GE Energy Connections RPV
Check the bushing instruments and the status of the electric wiring.
Check the status of the oil valves and the warranty seals
No damages.
Contact GE Energy Connections RPV.
2
Electronic Impact recorder (if installed)
Remove the impact recorder and ship it to GE Energy Connections RPV.
Only for bushings shipped with the electronic
impact recorder
---
3
Transformer turret treatment data
Check that the transformer turret has been processed in accordance with the
Transformer Manufacturer procedure and that oil parameters inside the barriers are in
line with
Table 13
data.
Oil final characteristics:
Water content by KF at 20°C: ________ ppm
Breakdown voltage on 2.5 mm gap: ___ kV
Total gas content: _________________ ppm
Power factor at 90°C: ______________
Resistivity at 30°C: ________________
Ω
x m
Particle content ISO class: __________
If parameters are not OK stop bushing
installation activities and proceed with a new
treatment of the transformer turret.
Inform GE Energy Connections RPV.
Содержание PHI 530.1425.2500
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