The purpose of HV bushings

is to provide a safely insulated entrance for an electrical conductor into a high-voltage device, such as power capacitors and transformers.

For oil/gas hermetically filled devices, bushings need to be leak free.

 

The challenge for a long lifetime

Bushings must keep hermeticity and insulating performances, withstanding:

  • Any outdoor climatic condition
  • Wide operating temperature range, from extreme cold to very hot environments
  • Mechanical stresses in operation and maintenance activities
  • Peak temperatures and mechanical stress during assembly to devices
  • Rated voltage and current without partial/corona discharge, flashover and overheating

Zamber has the longest track record of capacitor bushings operating on field

We have been manufacturing hermetic bushings for more than 60 years, exporting to primar international capacitor manufacturers.

Some millions of Zamber bushings have been installed worldwide, giving us the longest track record of on field product duration.

We constantly perform rigorous tests on our products and on our production processes so to keep the highest quality and European standards standards.

 

Our wide product range is based on different technologies: Metallized Bushings and Rubber Seal bushings.

As range completion, Assembled bushings delivered with kit of metal parts and gaskets for self assembly and rubber bird caps as accessories.

 

We supply our bushings in a big number of variants, and on request, our R&D develops customized products or variants following customer’s indication.


         
         
         
         
         
OUTSTANDING PERFORMANCES OF ZAMBER BUSHINGS
LOWEST TEMPERATURES
Withstand operating temperature down to -60°C and up to 130°C

BEST ELECTRICAL PERFORMANCES
No sharp edges minimize corona effects and radio influence voltage activity

BEST METAL MATERIALS
High grade stainless steel AISI316L, AISI304L and brass CW617

100% LEAK TESTED
Every bushings coming out from our factory has been leak tested at 6 bars

TESTED SEAL QUALITY
Low absorption and best rebounding tests for rubber seals
High adhesion traction tests for metallization

TOP RELIABILITY OF ELECTRICAL TESTS
Electrical tests are performed at CESI, primar European laboratory

FREQUENT MECHANICAL TEST
Mechanical tests are frequently carried out at Zamber
Test procedures have been assessed by CESI lab


HIGHEST MECHANICAL RESISTANCE
Cantilever 1000N
Cantilever 1000N under pressure
Torque 45Nm
Traction 1000N

MADE IN EUROPE


THEY WORK ALSO WITHOUT GLUE
Metal parts are fastened to porcelain by means of metallizing/soldering or by means of our patented spinning technology. A qualified retaining resin, where applied, is just for added security

LONG OPERATING LIFE
In 60 years activity, we placed on field millions of bushings… still in service..!

BEST PORCELAIN QUALITY
High resistance mass and best glaze quality. They also look good!

FREE OF DIELECTRIC FLUID CONTAMINATION
All materials in contact with dielectric oil are contamination free

ECO-FRIENDLY
Product is compliant to RoHS, Reach, Dodd’s Act and Conflict free following European standards