Download Print this page

Siemens SIPROTEC 7SJ600 Instruction Manual page 63

Numerical overcurrent, motor and overload relay

Advertisement

6-
9

&RQQHFWLRQV
*HQHUDO DQG FRQQHFWLRQ GLDJUDPV DUH VKRZQ LQ $S
SHQGL[ $ DQG % 7KH PDUVKDOOLQJ SRVVLELOLWLHV RI WKH
ELQDU\ LQSXWV DQG RXWSXWV DUH GHVFULEHG LQ 6HFWLRQ

,I WKH WULS FLUFXLW VXSHUYLVLRQ LV XVHG GHFLVLRQ PXVW
EH PDGH ZKHWKHU WZR ELQDU\ LQSXWV RU RQO\ RQH LV
DYDLODEOH IRU WKLV SXUSRVH 7KH IXQFWLRQ LV H[SODLQHG
LQ GHWDLO LQ 6HFWLRQ  ZKHUH DOVR WKH SULQFLSOH FRQ
QHFWLRQV DUH JLYHQ
1RWH ,W PXVW EH FRQVLGHUHG WKDW WZR ELQDU\ LQSXWV
RU RQH LQSXW DQG D UHSODFHPHQW UHVLVWRU DUH FRQ
QHFWHG LQ VHULHV 7KHUHIRUH WKH SLFNXS WKUHVKROG RI
WKH ELQDU\ LQSXW V 6HFWLRQ  PXVW EH FOHDUO\
VPDOOHU WKDQ KDOI WKH FRQWURO YROWDJH
,I RQH VLQJOH ELQDU\ LQSXW LV DYDLODEOH )LJXUH   DQ
H[WHUQDO UHVLVWRU 5 PXVW EH FRQQHFWHG LQ WKH FLUFXLW
RI WKH EUHDNHU DX[LOLDU\ FRQWDFW $X[  ZKLFK UH
SODFHV WKH PLVVLQJ VHFRQG ELQDU\ LQSXW UHIHU DOVR WR
6HFWLRQ   7KXV D IDXOW LV DOVR GHWHFWHG ZKHQ
WKH 12 DX[LOLDU\ FRQWDFW LV RSHQ DQG WKH WULS UHOD\
8
&9
/
6-
‚… h’ ‚‡ur… ƒ…‚‡rp
75
‡v‚ …ryh’
&/26(
$X[
7&
&%
/
WULS FRQWDFW RSHQ
)LJXUH 
'LPHQVLRQLQJ WKH H[WHUQDO UHVLVWRU 5 ZKHQ RQH VLQJOH ELQDU\ LQSXW LV XVHG
&*&
6-
%, 
8
%, PLQ
,
%, +LJK
5
75,3
$X[
5
7&
FRQWDFW KDV UHVHW 7KLV UHVLVWRU PXVW EH GLPHQ
VLRQHG VXFK WKDW WKH WULS FRLO 7& RI WKH EUHDNHU FDQ
QRW RSHUDWH ZKHQ WKH EUHDNHU LV RSHQ $X[ RSHQ
DQG $X[ FORVHG  EXW WKDW WKH ELQDU\ LQSXW %, FDQ
RSHUDWH ZKHQ WKH WULS FRQWDFW RI WKH GHYLFH KDV
RSHQHG DW WKH VDPH WLPH )LJXUH  
7KLV UHVXOWV LQ DQ XSSHU OLPLW 5
5
RI WKH UHVLVWDQFH IURP ZKLFK WKH DULWKPHWLFDO
€v
PHDQ YDOXH LV WDNHQ
5
 5
5
€h‘
€v

7KH PD[LPXP UHVLVWDQFH 5
PLQLPXP FRQWURO YROWDJH RI WKH ELQDU\ LQSXW
8
 8
5
8W
,
€h‘
7D Cvtu
7KH PLQLPXP UHVLVWDQFH 5
PD[LPXP FRQWURO YROWDJH ZKLFK GRHV QRW RSHUDWH
WKH FLUFXLW EUHDNHU WULS FRLO
8
&9
/
6-
75
‚… h’ ‚‡ur… ƒ…‚
‡rp‡v‚ …ryh’
&/26(
$X[
7&
&%
/
WULS FRQWDFW FORVHG
,QVWDOODWLRQ LQVWUXFWLRQV
DQG D ORZHU OLPLW
€h‘
LV GHULYHG IURP WKH
€h‘
 5
7D €v
U8
LV GHULYHG IURP WKH
€v
6-
%, 
5
75,3
$X[
8
U8 GPX
5
7&


Advertisement

loading