Buffer Assembly - GE AKR-30 Series Maintenance Manual

SECTION 7-Breaker Maintenance (Cont.)
7 . 1 4

BUFFER ASSEMBLY

When the breaker is closed , the energy in the c losing
spring i s transferred to the m a i n s h aft thro u g h the
mechan ism. The main shaft then drives the contacts
closed. The end plate assembly on each end of the main
shaft is driven against the buffer assembly shown in Fig.
This prevents the mechanism from overdriving the
40.
contacts.
E N D PLATE
FIG. 40
-
FIG. 41
-
BU FFER/END P LATE R E LATIONSHI P-BR EAKER CLOSED
B U FFER/EN D P LATE R E LATIO N S H I P- B R EAKER OPEN
When the break � r is opened, the end plate assembly is
driven against the opposite end of the buffer assembly.
The buffer is a stop absorbing the opening energy of the
mechanism. See Fig.
41 .
E N D PLATE
31