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HVDC TRANSFORMER BUSHINGS
PHI 530.1425.2500
PHI 265.850.1500
Kepco project
IS 2664 GB
Page
3
of
70
1
Introduction
These instructions are applicable to the hybrid type HVDC transformer bushings of the PHI series and provide
all information relevant to:
•
Safety aspects.
•
Transport conditions.
•
Technical characteristics.
•
Controls at the arrival and preparation activities.
•
Lifting and installation operation.
•
Oil filtering and recirculation.
•
Gas filling operation.
•
Service and maintenance plan and procedures.
The PHI bushings are manufactured and tested in compliance with the following standards:
IEC 62199 – 2004 Bushings for DC application.
IEC 60137 - 2003 Insulated bushings for alternating voltages above 1000V.
2
Safety
In this document important safety requirements are highlighted by the word
WARNING.
Mandatory safety
actions are evidenced by the word
OBLIGATION
,
while important operative instructions are evidenced by the
word
NOTE
.
This manual must be available to the personnel responsible of the installation, operation and maintenance of
the bushings.
The transformer bushing is a high voltage DC device, filled under pressure with SF6 gas, that realizes the
interface between the transformer and the convertor. The arrangement of the bushing allows the passage
through the wall of the valve building.
The preparation and the installation of the bushing, the oil filtering and treatment process, the gas filling and the
periodical maintenance operations must be performed by qualified operators.
They have to be trained to operate in accordance with the guidelines described in this instruction manual.
Every operator must use the prescribed tools and the prescribed safety devices.
Non-compliance with the following procedures and instructions can result in serious and dangerous situations
for the personnel and in risks of damages of the equipment and the property and environment pollution.