Siemens 7UT512

0HWKRG RI RSHUDWLRQ87
9
&*&
E
,
GLII
,
1*H
,
VWDE
,
1*H



           
F
D
)DXOW FKDU
DFWHULVWLF
7ULS DUHD
$GGRQ VWDELOL]DWLRQ
%ORFN DUHD

)LJXUH  2SHUDWLRQ FKDUDFWHULVWLFV RI WKH GLIIHUHQWLDO SURWHFWLRQ
 $GGRQ VWDELOL]DWLRQ GXULQJ FXU
UHQW WUDQVIRUPHU VDWXUDWLRQ
6DWXUDWLRQ RI WKH FXUUHQW WUDQVIRUPHUV FDXVHG E\
KLJK IDXOW FXUUHQWV DQGRU ORQJ PDFKLQH WLPH FRQ
VWDQWV DUH XQFULWLFDO IRU LQWHUQDO IDXOWV IDXOW LQ WKH SUR
WHFWHG PDFKLQH VLQFH WKH PHDVXUHG YDOXH GHIRU
PDWLRQ LV IRXQG LQ WKH GLIIHUHQWLDO FXUUHQW DV ZHOO LQ
WKH VWDELOL]LQJ FXUUHQW WR WKH VDPH H[WHQW 7KH IDXOW
FKDUDFWHULVWLF DV LOOXVWUDWHG LQ )LJXUH  LV SULQFL
SDOO\YDOLG LQ WKLV FDVH WRR 2I FRXUVH WKHIXQGDPHQ
WDO ZDYH RI WKH GLIIHUHQWLDO FXUUHQW PXVW H[FHHG DW
OHDVW WKH SLFNXS WKUHVKROG EUDQFK D LQ )LJXUH 
'XULQJ DQ H[WHUQDO IDXOW ZKLFK SURGXFHV D KLJK
WKURXJK IORZLQJ VKRUWFLUFXLW FXUUHQW FDXVLQJ FXUUHQW
WUDQVIRUPHU VDWXUDWLRQ D FRQVLGHUDEOH GLIIHUHQWLDO
FXUUHQW FDQ EH VLPXODWHG HVSHFLDOO\ ZKHQ WKH GH
JUHH RI VDWXUDWLRQ LV GLIIHUHQW DW WKH WZR PHDVXULQJ
SRLQWV ,I WKH TXDQWLWLHV ,
GLII
,
VWDE
UHVXOW LQ DQ RSHUDWLQJ
SRLQW ZKLFK OLHV LQ WKH WULS DUHD RI WKH RSHUDWLQJ FKDU
DFWHULVWLF )LJXUH  WULS VLJQDO ZRXOG EH WKH FRQ
VHTXHQFH LI WKHUH ZHUH QR VSHFLDO PHDVXUHV
87 SURYLGHV D VDWXUDWLRQ LQGLFDWRU ZKLFK GHWHFWV
VXFK SKHQRPHQD DQG LQLWLDWHV DGGRQ VWDELOL]DWLRQ
PHDVXUHV 7KH VDWXUDWLRQ LQGLFDWRU RSHUDWHV G\
QDPLFDOO\ LQ WKH DUHD ZKLFK LV GHVLJQDWHG ZLWK lDGG
RQ VWDELOL]DWLRQl LQ )LJXUH  7KH VORSH RI WKLV
FKDUDFWHULVWLF FRUUHVSRQGV WR KDOI WKH VORSH RI WKH
EUDQFK E
&XUUHQW WUDQVIRUPHU VDWXUDWLRQ GXULQJ H[WHUQDO IDXOWV
LV GHWHFWHG E\ D KLJK LQLWLDO VWDELOL]LQJ FXUUHQW ZKLFK
PRYHV WKH RSHUDWLQJ SRLQW EULHIO\ LQWR WKH lDGGRQ
VWDELOL]DWLRQl DUHD )LJXUH  ,Q FRQWUDVW WKH RS
HUDWLQJ SRLQW PRYHV LPPHGLDWHO\ DORQJ WKH IDXOW
FKDUDFWHULVWLF ZKHQ DQ LQWHUQDO IDXOW RFFXUV VLQFH WKH
VWDELOL]DWLRQ FXUUHQW ZLOO EDUHO\EH KLJKHU WKHQ WKH GLI
IHUHQWLDO FXUUHQW 7KH VDWXUDWLRQ LQGLFDWRU PDNHV LWV
GHFLVLRQ ZLWKLQ WKH ILUVW KDOI SHULRG DIWHU IDXOW LQFHS
WLRQ
:KHQ DQ H[WHUQDO IDXOW LV GHWHFWHG WKH GLIIHUHQWLDO
SURWHFWLRQ LV EORFNHG IRU D VHOHFWDEOH WLPH  SHULRGV
DW WKH ORQJHVW FRUUHVSRQGLQJ WR  PV DW  +]
ZKHQ WKH UHOD\ LV GHOLYHUHG 7KLV EORFNLQJ LV FDQ
FHOOHG DV VRRQ DV WKH RSHUDWLRQ SRLQW PRYHV VWHDGLO\
LH RYHU WZR SHULRGV RQ WKH IDXOW FKDUDFWHULVWLF
7KLV DOORZV WR GHWHFW HYROYLQJ IDXOWV LQ WKH SURWHFWHG
PDFKLQH UHOLDEO\ HYHQ GXULQJ DQ H[WHUQDO IDXOW ZLWK
FXUUHQW WUDQVIRUPHU VDWXUDWLRQ
 3LFNXS  7ULSSLQJ
$V VRRQ DV WKH IXQGDPHQWDO ZDYH RI WKH GLIIHUHQWLDO
FXUUHQW H[FHHGV   RI WKH VHW YDOXH RU WKH VWDELOL]
LQJ FXUUHQW H[FHHGV  WLPHV WKH UDWHG PDFKLQH FXU
UHQW WKH SURWHFWLRQ SLFNV XS 7KXV SLFNXS RFFXUV
DOVR LQ FDVH RI H[WHUQDO IDXOWV VR WKDW IDXOW UHFRUGLQJ
DQG VDWXUDWLRQ LQGLFDWRU FDQ RSHUDWH
,IWKHWULSFRQGLWLRQVDUHIXOILOOHGWULSVLJQDOLVLVVXHG
)RU VSHFLDO FDVHV WKH WULS FRPPDQG FDQ EH GH
OD\HG )LJXUH  VKRZV D VLPSOLILHG WULSSLQJ ORJLF
5HVHW RI SLFNXS LV LQLWLDWHG ZKHQ GXULQJ  SHULRGV
SLFNXS LV QR ORQJHU UHFRJQL]HG LQ WKH GLIIHUHQWLDO YDO
XHV LH WKH GLIIHUHQWLDO FXUUHQW KDV IDOOHQ EHORZ  
RI WKH VHW YDOXH
www . ElectricalPartManuals . com