ABB AMVAC Technical Manual page 5

Maintenance free vacuum
interrupter and current
carrying parts in one
embedded assembly.
5 kV
Innovation extends to the vacuum interrupter
assembly, as well. For the first time in any
vacuum circuit breaker, the interrupter and the
current carrying parts are completely embedded in
a proprietary epoxy resin. Thermal performance
of the interrupter is improved as the epoxy resin
draws heat away from hot spots for a more even
heat distribution. Moreover, the interrupter pole
assembly is fully skirted so that push rod and
other moving parts of the current transfer area are
isolated and protected from external influences.
As a result, accumulations of dust, dirt, and
condensation do not increase tracking and partial
discharge as they do in non-embedded designs.
AMVAC. Qualities that convince.
15 kV
27 kV
5