SECTION 8-Contact Maintenance (Cont.)
8.5 STATIONARY CONTACT
IDENTIFICATION
The stationary arcing, intermediate, and main contacts
each have a different function d uring current conduction
and current interruption. For this reason, these contacts
are made using different material compositions. Also, the
different functions require that the contacts be replaced in
configurations shown in Figs.
44, 47
or 48.
Fig.
49
shows the stationary contacts and how they
d iffer from one another. The
800
amp main and arcing
contacts are rectang ular, but the arcing contacts have
two of their corners notched. The
1 600/2000
amp main
and i ntermediate contacts are rectangular, but the main
contacts have two of their corners notched . The i nter
mediate contacts have all fou r corners notched .
38
1 600/2000 AMP
MAIN
1 600/2000AM P
I N T E R M E DI AT E
FIG.
49 -
STATIONARY CONTACT CONFIG URATION
800 A M P MAIN
800 A M P A R C I N G
www
. ElectricalPartManuals
. com