Nuova Via di Piano Comprensorio Vulcano
Sesto San Giovanni, MI 20099 Italy
Tel. 02-24105.001
IS 2653 GB
Page
3
of
18
1
Introduction
These instructions are applicable to the gas SF6 insulated HV wall bushings of the series PWS/PWHS and
provide all information relevant to:
•
Safety aspects.
•
Transport conditions.
•
Technical characteristics.
•
Controls at the arrival and preparation activities.
•
Gas filling operation.
•
Service and maintenance plan and procedures.
The PWS (HVAC) wall bushings are manufactured and tested in compliance with the following standards:
IEC 60137 Insulated bushings for alternating voltages above 1000V.
The PWHS (HVDC) wall bushing are manufactured and tested in compliance with the following standards:
IEC 62199 Bushing for DC application.
IEC 60137 Insulated bushings for alternating voltages above 1000V
2
Safety
In this document important safety requirements are highlighted by the word
CAUTION
and 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 wall bushing is a high voltage AC/DC device, filled under pressure with SF6 gas, that has to be installed at
relevant height through the wall of the valve building.
The preparation and the installation of the bushing, the gas filling and the periodical maintenance operations
must be performed by qualified operators. The operators must 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.
