SECTION 8-Contact Maintenance (Cont.)
8.5 STATIONARY CONTACT
IDENTIFICATION
The stationary arcing, intermediate, and main contacts
each have a different function during 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
differ from one another. The 800 amp main and arcing
contacts are rectangular, but the arcing contacts have
two of their corners notched. The 1 600/2000 amp main
and intermediate contacts are rectangular, but the main
contacts have two of their corners notched. The inter
mediate contacts have all four corners notched.
38
1 600/2000 AMP
MAIN
1 600/2000AMP
INTERMEDIATE
FIG. 49 - STATIONARY CONTACT CONFIGURATION
• ·'- . .
l
' � . '
. �
800 AMP MAIN
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