Siemens SIPROTEC 7SJ600 - Page 51

0HWKRG RI RSHUDWLRQ6-
9
& * &
 7ULS FLUFXLW VXSHUYLVLRQ
7KH GHYLFH LQFOXGHV DQ WULS FLUFXLW VXSHUYLVLRQ IRU
RQH WULS FLUFXLW 'HSHQGHQW RQ WKH QXPEHU RI ELQDU\
LQSXWV ZKLFK DUH DYDLODEOH IRU WKLV SXUSRVH VXSHUYL
VLRQ FDQ EH HIIHFWHG ZLWK RQH RU WZR ELQDU\ LQSXWV
:KHQ WZR ELQDU\ LQSXWV DUH XVHG GLVWXUEDQFHV LQ
WKH WULS FLUFXLW FDQ EH GHWHFWHG IRU HYHU\ VZLWFKLQJ
FRQGLWLRQ ZKHQ RQH ELQDU\ LQSXW LV XVHG WKRVH GLV
WXUEDQFHV ZKLFK RFFXU GXULQJ FORVHG WULS FRQWDFWV
FDQQRW EH GHWHFWHG
)LJXUH  VKRZV WKH ORJLF GLDJUDP RI WKH DQQXQFL
DWLRQV JHQHUDWHG E\ WKH WULS FLUFXLW VXSHUYLVLRQ
 6XSHUYLVLRQ XVLQJ WZR ELQDU\ LQ
SXWV
:KHQ WZR ELQDU\ LQSXWV DUH XVHG WKH\ DUH FRQ
QHFWHG DFFRUGLQJ WR )LJXUH  RQH LQSXW LQ SDUDO
OHO WR WKH WULS UHOD\ WKH FLUFXLW RI ZKLFK LV WR EH VXSHU
YLVHG WKH RWKHU LQ SDUDOOHO WR WKH FLUFXLW EUHDNHU DX[LO
LDU\ FRQWDFW
7KH ELQDU\ LQSXWV DUH HQHUJL]HG ORJLFDO k+l RU
VKRUWFLUFXLWHG ORJLFDO k/l GHSHQGLQJ RQ WKH VWDWXV
RI WKH WULS UHOD\ DQG WKH FLUFXLW EUHDNHU
'XULQJ QRUPDO RSHUDWLRQ LW LV QRW SRVVLEOH WKDW ERWK
WKH ELQDU\ LQSXWV DUH GHHQHUJL]HG ORJLFDO k/l DW WKH
VDPH WLPH XQOHVV IRU WKH VKRUW WLPH ZKHUH WKH WULS
UHOD\ KDV DOUHDG\ FORVHG EXW WKH EUHDNHU LV QRW \HW
RSHQ
,I ERWK WKH ELQDU\ LQSXWV DUH GHHQHUJL]HG FRQWLQX
RXVO\ WKLV LQGLFDWHV WKDW HLWKHU WKH WULS FLUFXLW LV LQWHU
UXSWHG RU WKH WULS FLUFXLW LV VKRUWFLUFXLWHG RU WKH
FRQWURO YROWDJH IRU WULSSLQJ LV DEVHQW RU WKH EUHDNHU
KDV QRW SURSHUO\ RSHUDWHG 7KXV WKLV VWDWXV LQGL
FDWHV D IDXOW LQ WKH WULS FLUFXLW
7KH VWDWXV RI WKH WZR ELQDU\ LQSXWV LV FKHFNHG DS
SUR[LPDWHO\ HYHU\  PV $Q LQWHQWLRQDO WLPH GHOD\
IRU DODUP LV SURGXFHG E\ WKUHH UHSHDWHG VWDWXV
FKHFNV EHIRUH DQ DODUP LV JLYHQ 7KLV SUHYHQWV IURP
IDXOW\ DODUPV GXH WR VKRUW WUDQVLHQW RFFXUUHQFHV
 6XSHUYLVLRQ XVLQJ RQH EL QDU\ LQ
SXW
:KHQ RQH ELQDU\ LQSXW LV XVHG WKLV LV FRQQHFWHG DF
FRUGLQJ WR )LJXUH  LQ SDUDOOHO WR WKH WULS UHOD\ WKH
FLUFXLW RI ZKLFK LV WR EH VXSHUYLVHG
7KH ELQDU\ LQSXW LV HQHUJL]HG ORJLFDO k+l DV ORQJ DV
WKH WULS UHOD\ LV QRW HQHUJL]HG DQG WKH WULS FLUFXLW LV
KHDOWK\
:KHQ WKH ELQDU\ LQSXW LV QRW HQHUJL]HG ORJLFDO k/l
WKLV LQGLFDWHV WKDW HLWKHU WKH WULS FRQWDFW LV FORVHG RU
WKH WULS FLUFXLW LV LQWHUUXSWHG RU WKH WULS FLUFXLW LV
VKRUWFLUFXLWHG RU WKH FRQWURO YROWDJH IRU WULSSLQJ LV
DEVHQW $V WKH WULS FRQWDFWV PD\ EH FORVHG GXULQJ
KHDOWK\ WULS FLUFXLW FRQGLWLRQ WKH VWDWXV RI WKH ELQDU\
LQSXW LV FKHFNHG LQ UHODWLYHO\ ORQJ SHULRGV  V )XU
WKHUPRUH DQ LQWHQWLRQDO WLPH GHOD\ IRU DODUP LV SUR
GXFHG E\ WKUHH UHSHDWHG VWDWXV FKHFNV EHIRUH DQ
DODUPLVJLYHQ7KLVSUHYHQWVIURPIDXOW\DODUPVGXU
LQJ FORVHG WULS FRQWDFWV
6LQFH WKH VHFRQG ELQDU\ LQSXW LV QRW DYDLODEOH LQ WKLV
PRGH LW PXVW EH UHSODFHG E\ D UHVLVWRU 5 ZKLFK LV
FRQQHFWHG WR WKH EUHDNHU DX[LOLDU\ FRQWDFW $X[ UH
IHU WR )LJXUH  FRPSDUH ZLWK )LJXUH  7KLV
DOORZV WR GHWHFW GLVWXUEDQFH LQ WKH WULS FLUFXLW HYHQ
ZKHQ WKH EUHDNHU DX[LOLDU\ FRQWDFW $X[ LV RSHQ DQG
WKH WULS FRQWDFW LV UHVHW 7KH UHVLVWDQFH RI 5 LV GLPHQ
VLRQHG VXFK WKDW WKH WULS FRLO 7& PXVW QRW EH HQHU
JL]HG ZKHQ WKH FLUFXLW EUHDNHU LV RSHQ DX[LOLDU\ FRQ
WDFW $X[ RSHQ $X[  FORVHG RQ WKH RWKHU KDQG WKH
ELQDU\ LQSXW PXVW EH VDIHO\ HQHUJL]HG ZKHQ WKH WULS
FRQWDFW LV RSHQ
,QIRUPDWLRQ RQ KRZ WR GLPHQVLRQ WKH UHVLVWRU DUH
FRQWDLQHG LQ 6HFWLRQ 
www . ElectricalPartManuals . com