High voltage composite or porcelain bushings insulated in SF6 or alternative
SAVER is able to manufacture bushings in composite material or porcelain,
completely assembled internally and electrically tested in its 750 kV AC High Voltage test laboratory.
Our bushings can use both SF6 or clean alternative gases as insulating media.
In general, bushings are used to bring the conductors, under voltage, into all types of electrical
equipment such as transformers, breakers, busbars, through-wall, GIS systems etc.…
They are divided into non-condenser and condenser bushings and the latter are divided according to their
application in air-air, air-SF6, air-oil bushing, through-wall (etc.…) and according
to their insulating media (gas, RIP, OIP etc.).
In high and very high voltage applications, SF6 gas is commonly used as an insulating medium as it is not
subject to aging, it is not toxic nor flammable and has an excellent dielectric, arc-extinguishing, thermal
properties and it is possible to control the dielectric stress through its density (with the support of a pressure detector).
However, SF6 is a greenhouse gas, therefore:
SAVER GRANTS MAXIMUM GAS TIGHTNESS PERFORMANCES OF THE BUSHING, limiting the annual
emission of the aforementioned gas into the atmosphere according to internal acceptability criteria much
more stringent than those prescribed by the IEC international standards.
SAVER HAS DEVELOPED, TOGETHER WITH ITS PRIMARY CUSTOMERS, COMPOSITE BUSHINGS COMPATIBLE
WITH CLEAN ALTERNATIVE GASES (non-greenhouse gases), which therefore do not require any use of SF6.
The bushing produced by Saver are characterized by:
ROBUST AND SAFE DESIGN, developed to guarantee the best dielectric, gas tightness and anti-corrosion performances over the long term and maximum safety on site
CAREFUL SELECTION AND VALIDATION OF MATERIALS, of their treatments and their surfaces finishing
ELECTRICAL SIMULATIONS AND TYPE TESTS carried out in certified laboratories with accredited third parties:
AC TEST AND PARTIAL DISCHARGE DETECTION
TEMPERATURE RISE TEST
EXECUTION OF CERTIFIED WELDING according to EN ISO 15614-2, X-ray and radiographic validations, resistivity tests
ASSEMBLY AND CLEANING LINE, MECHANICAL PRESSURE AND TIGHTNESS TESTS at the highest technical level (Dilo system for SF6 treatment)
SVTI CERTIFICATIONS of Saver S.p.A. and Saver Alumen S.r.l.
FULL ELECTRONIC TRACEABILITY and storage of all key process parameters
BUSHING PORTFOLIO available with standard, customized and after sales solutions
COMPATIBLE MATERIALS FOR SF6 AND FOR CLEAN ALTERNATIVE GASES
HIGH VOLTAGE ROUTINE TESTS that certify "PD free < 2 pC" partial discharge levels thanks to:
THE PERFECT SHIELDING OF THE FARADAY CAGE
THE BEST HIGH VOLTAGE (750 kV AC) and Partial Discharge detection equipment (background noise between 0.2-0.4 pC at 750 kV)
THE SOLIDITY OF THE DESIGN AND CONSTRUCTION PROCESS OF THE BUSHINGS
POSSIBILITY TO WITNESS THE HIGH VOLTAGE ROUTINE TESTS by OEM and Utilities in our HV LAB