Circuit Breaker; Vacuum Interrupters; Mechanical Interlock - Siemens 8DA series Operating Instructions Manual

9 Circuit-breaker
9.1 Design
7KH YDFXXP FLUFXLWEUHDNHU LV DQ LQWHJUDO FRPSRQHQW RI
WKH VZLWFKSDQHO DQG FRQVLVWV RI WKH IROORZLQJ
FRPSRQHQWV
q 2SHUDWLQJ PHFKDQLVP ZLWK VWRUHGHQHUJ\ VSULQJ
PHFKDQLVP DQG FRQWURO HOHPHQWV
q 6ZLWFKLQJ URGV IRU FRQWDFW RSHUDWLRQ
q  WR  VZLWFKSDQHO SROHV ZLWK YDFXXP LQWHUUXSWHUV

Mechanical interlock

7KH FLUFXLWEUHDNHU LV SURWHFWHG PHFKDQLFDOO\ DJDLQVW
PDORSHUDWLRQ 7KH PHFKDQLFDO SURWHFWLRQ SUHYHQWV WKH
FLUFXLWEUHDNHU IURP EHLQJ FORVHG DV ORQJ DV WKH WKUHH
SRVLWLRQ VZLWFK LV LQ IDXOW\ SRVLWLRQ )XUWKHUPRUH WKH
PHFKDQLFDO SURWHFWLRQ SUHYHQWV WKH WKUHHSRVLWLRQ
VZLWFK IURP EHLQJ RSHUDWHG ZKHQ WKH FLUFXLWEUHDNHU
LV FORVHG
'; %$ '(6&5,37,21 '$   ,668( 

Vacuum interrupters

([DPSOH RI D YDFXXP LQWHUUXSWHU
Fig. 6:
%XVKLQJ
a
7RS IODQJH
s
,QWHUUXSWHU VXSSRUW
d
9DFXXP LQWHUUXSWHU H[DPSOH W\SH
f
&XUUHQW WUDQVIRUPHU
g
7KH YDFXXP LQWHUUXSWHU LV IL[HG DW WKH LQWHUUXSWHU
VXSSRUW 7KH IL[HGPRXQWHG FRQWDFW ERWWRP LV
GLUHFWO\ FRQQHFWHG WR WKH KRXVLQJ 7KH PRYLQJ FRQWDFW
WRS LV ILUPO\ FRQQHFWHG WR WKH FRQQHFWLRQ EROW DQG LV
FHQWUDOO\ DOLJQHG LQ WKH JXLGH 7KH PHWDO EHOORZV LQVLGH
WKH LQWHUUXSWHU IRUPV WKH YDFXXPWLJKW FRQQHFWLRQ WR
WKH JDV FRPSDUWPHQW
Description