Calculating The System Current Draw; 1: Overview; 2: How To Use Table 5-3 On Page 46 To Calculate System Current Draw - Fire-Lite MS-2 User Manual

&DOFXODWLQJ WKH 6\VWHP &XUUHQW 'UDZ
7$%/(  &RQYHUWLQJ WR )XOO $PSHUHV
7R FRQYHUW
0LOOLDPSHUHV P$ WR
DPSHUHV $
—
0LFURDPSHUHV $ WR
DPSHUHV $
0606 31  % 
 &DOFXODWLQJ WKH 6\VWHP &XUUHQW 'UDZ
 2YHUYLHZ
7KH FRQWURO SDQHO PXVW EH DEOH WR SRZHU DOO LQWHUQDO DQG H[WHUQDO GHYLFHV FRQWLQXRXVO\
GXULQJ WKH QRQILUH DODUP FRQGLWLRQ 7R FDOFXODWH WKH QRQILUH DODUP ORDG RQ WKH V\VWHP
SRZHU VXSSO\ ZKHQ SULPDU\ SRZHU LV DSSOLHG XVH &DOFXODWLRQ &ROXPQ  LQ 7DEOH 
RQ SDJH  7KH FRQWURO SDQHO PXVW VXSSRUW D ODUJHU ORDG FXUUHQW GXULQJ D ILUH DODUP
FRQGLWLRQ 7R FDOFXODWH WKH ILUH DODUP ORDG RQ WKH SRZHU VXSSO\ XVH &DOFXODWLRQ &RO
XPQ  LQ 7DEOH  RQ SDJH  7KH VHFRQGDU\ SRZHU VRXUFH EDWWHULHV PXVW EH DEOH WR
SRZHU WKH V\VWHP GXULQJ D SULPDU\ SRZHU ORVV 7R FDOFXODWH WKH QRQILUH DODUP ORDG RQ
WKH VHFRQGDU\ SRZHU VRXUFH XVH &DOFXODWLRQ &ROXPQ  LQ 7DEOH  RQ SDJH 
:KHQ FDOFXODWLQJ FXUUHQW GUDZ DQG WKH EDWWHU\ VL]H QRWH WKH IROORZLQJ
‡ µ3ULPDU\¶ UHIHUV WR WKH PDLQ SRZHU VRXUFH IRU WKH FRQWURO SDQHO
‡ µ6HFRQGDU\¶ UHIHUV WR WKH FRQWURO SDQHO¶V EDFNXS EDWWHULHV
‡ $OO FXUUHQWV DUH JLYHQ LQ DPSHUHV $  7DEOH  VKRZV KRZ WR FRQYHUW PLOOLDP
SHUHV DQG PLFURDPSHUHV WR IXOO DPSHUHV
0XOWLSO\
P$ [ 
—
$ [ 
 +RZ WR 8VH 7DEOH  RQ SDJH  WR &DOFXODWH 6\VWHP &XUUHQW 'UDZ
8VH 7DEOH  RQ SDJH  WR FDOFXODWH FXUUHQW GUDZV DV IROORZV
 (QWHU WKH TXDQWLW\ RI GHYLFHV LQ DOO WKUHH FROXPQV
 (QWHU WKH FXUUHQW GUDZ ZKHUH UHTXLUHG 5HIHU WR WKH )LUH/LWH 'HYLFH &RPSDWL
ELOLW\ 'RFXPHQW IRU FRPSDWLEOH GHYLFHV DQG WKHLU FXUUHQW GUDZ
 &DOFXODWH WKH FXUUHQW GUDZV IRU HDFK LQ DOO FROXPQV
 6XP WKH WRWDO FXUUHQW IRU HDFK FROXPQ
 &RS\ WKH WRWDOV IURP &ROXPQ  DQG &ROXPQ  WR 7DEOH  RQ SDJH 
)ROORZLQJ DUH WKH W\SHV RI FXUUHQW WKDW FDQ EH HQWHUHG LQWR 7DEOH  RQ SDJH 
✓ &DOFXODWLRQ &ROXPQ   7KH SULPDU\ VXSSO\ FXUUHQW ORDG WKDW WKH FRQWURO
SDQHO PXVW VXSSRUW GXULQJ D QRQILUH DODUP FRQGLWLRQ ZLWK $& SRZHU
DSSOLHG
✓ &DOFXODWLRQ &ROXPQ   7KH SULPDU\ VXSSO\ FXUUHQW ORDG WKDW WKH FRQWURO
SDQHO PXVW VXSSRUW GXULQJ D ILUH DODUP FRQGLWLRQ ZLWK $& SRZHU DSSOLHG
✓ &DOFXODWLRQ &ROXPQ   7KH VWDQGE\ FXUUHQW GUDZQ IURP WKH EDWWHULHV LQ
D QRQILUH DODUP FRQGLWLRQ GXULQJ D ORVV RI $& SRZHU
3RZHU 6XSSO\ &DOFXODWLRQV
([DPSOH
 P$ [  $
—
 $ [   $