Siemens 7UT512

0HWKRG RI RSHUDWLRQ87
9

&*&
 $GGRQ VWDELOL]DWLRQ GXULQJ FXU
UHQW WUDQVIRUPHU VDWXUDWLRQ
6DWXUDWLRQ RI WKH FXUUHQW WUDQVIRUPHUV FDXVHG E\
KLJK IDXOW FXUUHQWV DQGRU ORQJ V\VWHP WLPH FRQ
VWDQWV DUH XQFULWLFDO IRU LQWHUQDO IDXOWV IDXOW LQ WKH SUR
WHFWHG WUDQVIRUPHU VLQFH WKH PHDVXUHG YDOXH GH
IRUPDWLRQ 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 SULQFLSDO
O\ YDOLG LQ WKLV FDVH WRR 2I FRXUVH WKH IXQGDPHQWDO
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 FKDU
DFWHULVWLF 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 RSHU
DWLQJ SRLQW PRYHV LPPHGLDWHO\ DORQJ WKH IDXOW FKDU
DFWHULVWLF ZKHQ DQ LQWHUQDO IDXOW RFFXUV VLQFH WKH VWD
ELOL]DWLRQ FXUUHQW ZLOO EDUHO\ EH KLJKHU WKHQ WKH GLIIHU
HQWLDO FXUUHQW 7KH VDWXUDWLRQ LQGLFDWRU PDNHV LWV GH
FLVLRQ ZLWKLQ WKH ILUVW KDOI SHULRG DIWHU IDXOW LQFHSWLRQ
: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
WUDQVIRUPHU UHOLDEO\ HYHQ GXULQJ DQ H[WHUQDO IDXOW
ZLWK FXUUHQW WUDQVIRUPHU VDWXUDWLRQ
 6SHHG\ XQVWDELOL]HG WULS ZLWK
KLJK FXUUHQW WUDQVIRUPHU IDXOW
+LJKFXUUHQW IDXOWV LQ WKH SURWHFWHG WUDQVIRUPHU PD\
EH FOHDUHG LQVWDQWDQHRXVO\ ZLWKRXW UHJDUG RI WKH
PDJQLWXGH RI WKH WKH VWDELOL]LQJ FXUUHQW ZKHQ WKH
DPSOLWXGH RI WKH GLIIHUHQWLDO FXUUHQWV FDQ H[FOXGH
WKDW LW LV DQ H[WHUQDO IDXOW 7KLV LV DOZD\V WKH FDVH
ZKHQ WKH VKRUWFLUFXLW FXUUHQW LV KLJKHU WKDQ

X
N
WLPHV WKH QRPLQDO WUDQVIRUPHU FXUUHQW
7KH WUDQVIRUPHU GLIIHUHQWLDO SURWHFWLRQ 87 SUR
YLGHV VXFK XQVWDELOL]HG KLJKFXUUHQW WULS VWDJH 7KLV
FDQ RSHUDWH HYHQ ZKHQ IRU H[DPSOH D FRQVLGHUDEOH
VHFRQG KDUPRQLF LV SUHVHQW LQ WKH GLIIHUHQWLDO FXU
UHQW FDXVHG E\ FXUUHQW WUDQVIRUPHU VDWXUDWLRQ E\ D
GF FRPSRQHQW LQ WKH VKRUWFLUFXLW FXUUHQW ZKLFK
FRXOG EH LQWHUSUHWHG E\ WKH LQUXVK VWDELOL]DWLRQ IXQF
WLRQ DV DQ LQUXVK FXUUHQW
7KLV KLJKFXUUHQW VWDJH HYDOXDWHV WKH IXQGDPHQWDO
ZDYH RI WKH FXUUHQWV DV ZHOO DV WKH LQVWDQWDQHRXV
YDOXHV ,QVWDQWDQHRXV YDOXH SURFHVVLQJ HQVXUHV
IDVW WULSSLQJ HYHQ LQ FDVH WKH IXQGDPHQWDO ZDYH RI
WKH FXUUHQW LV VWURQJO\ UHGXFHG E\ FXUUHQW WUDQVIRUP
HU VDWXUDWLRQ
 3LFNXS  7ULSSLQJ
$V VRRQ DV WKH IXQGDPHQWDO ZDYH RI WKH GLIIHUHQWLDO
FXUUHQW UHDFKHV   RI WKH VHW YDOXH RU WKH VWDELOL]
LQJ FXUUHQW H[FHHGV  WLPHV WKH UDWHG WUDQVIRUPHU
FXUUHQW WKH SURWHFWLRQ SLFNV XS 7KXV SLFNXS RF
FXUV DOVR LQ FDVH RI H[WHUQDO IDXOWV VR WKDW IDXOW UH
FRUGLQJ DQG VDWXUDWLRQ LQGLFDWRU FDQ RSHUDWH
,IWKHWULSFRQGLWLRQVDUHIXOILOOHGWULSVLJQDOLVLVVXHG
)RU VSHFLDO FDVHV WKH WULS FRPPDQG FDQ EH
GHOD\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
,I D WULS FRPPDQG KDV QRW EHHQ LQLWLDWHG WKH IDXOW LV
FRQVLGHUHG WR EH RYHU
,I D WULS FRPPDQG KDV EHHQ IRUPHG WKHQ D WLPHU RI
VHWWDEOH GXUDWLRQ FDQ EH VWDUWHG XSRQ UHVHW RI SLFN
XS 'XULQJ WKLV WLPH WKH WULS FRPPDQG LV KHOG LQ UH
VHW WLPH GHOD\
www . ElectricalPartManuals . com