GE AKR-30 Series Maintenance Manual page 216

SECTION 8-Contact Maintenance (Cont.)
8.5 STATIONARY CONTACT
I DENTI FICATION
The stationary arcing, intermediate, and main contacts
each have a different function d uring current conduction
and current i nterruption. For this reason, these contacts
are made using different material compositions. Also, the
different functions require that the contacts be replaced in
configurations shown i n Figs. 44, 47 or 48.
Fig. 49 shows the stationary contacts and how they
d iffer from one another. The
contacts are rectang ular, but the arci ng contacts have
two of their corners notched. The
and i ntermed iate contacts are rectang u lar, but the main
contacts have two of their corners notched . The i nter­
med iate contacts have all fou r corners notched .
1 600/2000 A M P
M A I N
1 600/2000AM P
I N T E R M E D I AT E
F I G .
38
am p main and arcing
800
am p main
1 600/2000
STATIONARY CONTACT CON FIG U RATION
49 -
8 0 0 A M P MAIN
800 A M P A R C I N G