Table of Contents
Advertisement
<
>
CONTENTS
9
PROTECTION FEATURES
(DFK 0DUWLQ $XGLR DPSOLILHU KDV PDQ\ DGYDQFHG SURWHFWLRQ IHDWXUHV SURWHFWLQJ ERWK WKH DPSOLILHU DQG WKH
ORXGVSHDNHUV FRQQHFWHG WR LW VKRXOG D IDXOW FRQGLWLRQ DULVH 8QGHU QRUPDO XVH WKHVH IHDWXUHV DUH LQDXGLEOH $OO
SURWHFWLRQ FLUFXLWV RSHUDWH LQGHSHQGHQWO\
9.1
$Q RXWSXW OLPLWHU LV LQFOXGHG WR DYRLG DPSOLILHU FOLSSLQJ :KHQ DQ DPSOLILHU LV VHYHUHO\ RYHUGULYHQ LWV RXWSXW ZDYHIRUP
LV FOLSSHG LWV SHDNV DUH VTXDUHG RII ± UHGXFLQJ WKH FUHVW IDFWRU ,Q H[WUHPH FDVHV WKH ZDYHIRUP FDQ DSSURDFK WKDW RI
D VTXDUH ZDYH $Q DPSOLILHU LV QRUPDOO\ FDSDEOH RI SURGXFLQJ IDU PRUH SRZHU XQGHU WKHVH FRQGLWLRQV WKDQ LWV QRUPDO
XQGLVWRUWHG UDWHG RXWSXW SRZHU
7KH OLPLWHU ZRUNV E\ PRQLWRULQJ WKH RXWSXW DQG FRPSDULQJ WKH GLVWRUWLRQ SURGXFHG EHWZHHQ WKH LQSXW DQG RXWSXW RI WKH
DPSOLILHU ,I WKH GLVWRUWLRQ H[FHHGV 7+' IRU DQ\ UHDVRQ YROWDJH RU FXUUHQW FOLSSLQJ WKH OLPLWHU UHGXFHV WKH LQSXW
VLJQDO SURSRUWLRQDOO\ 1RWH WKDW LI WKH VLJQDO LV GLVWRUWHG RU FOLSSHG EHIRUH LW UHDFKHV WKH DPSOLILHU WKH FOLS OLPLWHU ZLOO QRW
EH DFWLYDWHG
8QGHU QRUPDO RSHUDWLRQ WKH FOLS OLPLWHU LV LQDXGLEOH 7KH OLPLWHU FDQ EH WXUQHG ³21´ RU ³2))´ E\ SUHVVLQJ WKH UHOHYDQW
FOLS OLPLW VZLWFK 6HH SDJH
6RPH PDQXIDFWXUHUV RI ORXGVSHDNHU SURFHVVRUV GR QRW UHFRPPHQG WKH XVH RI FOLS OLPLWHUV LQ DPSOLILHUV DV LW FDQ
DIIHFW WKH WUDFNLQJ RI WKH SURFHVVRU
V OLPLWHUV
,I WKH DPSOLILHU LV EHLQJ XVHG ZLWKRXW DQ\ H[WHUQDO OLPLWLQJ 0DUWLQ $XGLR UHFRPPHQG OHDYLQJ WKH FOLS OLPLWHUV VZLWFKHG
21 EXWWRQ GHSUHVVHG
9.2
Thermal protection
:KHQ WKH DPSOLILHU LV GULYHQ YHU\ KDUG LQWR D ORZ LPSHGDQFH ORDG WKH FRROLQJ IDQV ZLOO UXQ DW KLJK VSHHG ,I WKHVH
RSHUDWLQJ FRQGLWLRQV FRQWLQXH WKH 3URWHFW LQGLFDWRU V ZLOO LOOXPLQDWH LQGLFDWLQJ WKDW WKH DPSOLILHU LV DERXW WR JR LQWR
WKHUPDO VKXWGRZQ
$IWHU ILYH VHFRQGV WKH DPSOLILHU ZLOO JR LQWR WKHUPDO SURWHFW E\ PXWLQJ WKH LQSXW VLJQDO $IWHU VHFRQGV WKH
DPSOLILHU ZLOO KDYH FRROHG GRZQ HQRXJK IRU WKH DPSOLILHU WR FRPH RXW RI VKXWGRZQ DQG RSHUDWH DV QRUPDO ,I WKH ORDG
FRQGLWLRQV UHPDLQ XQFKDQJHG WKH WKHUPDO SURWHFWLRQ ZLOO EH UH LQLWLDWHG 7KHUPDO SURWHFWLRQ RFFXUV ZKHQ WKH KHDW VLQN
WHPSHUDWXUH UHDFKHV
9.3
VHF protection
,I D VLJQDO RI PRUH WKDQ N+] DW IXOO SRZHU LV GHWHFWHG IRU PRUH WKDQ ILYH VHFRQGV WKH 9+) SURWHFWLRQ PXWHV WKH
LQSXW VLJQDO 7KLV LV LQGLFDWHG RQ WKH IURQW SDQHO 4 E\ WKH /(' ODEHOHG 3URWHFW $IWHU ILYH VHFRQGV WKH RXWSXWV ZLOO
XQPXWH DQG UHWXUQ WR QRUPDO RSHUDWLRQ XQOHVV WKH RXWSXW VLJQDO KDV UHPDLQHG XQFKDQJHG LQ ZKLFK FDVH WKH 9+)
SURWHFWLRQ ZLOO UHLQLWLDWH
9.4
Short circuit protection
$OO 0DUWLQ $XGLR 0$ 6HULHV DPSOLILHUV DUH FRPSOHWHO\ VKRUW FLUFXLW SURWHFWHG 7KH SURWHFWLRQ FLUFXLW SHUPLWV YHU\ KLJK
SHDN FXUUHQWV EXW VWLOO KROGV WKH RXWSXW GHYLFHV ZLWKLQ WKH VDIH RSHUDWLQJ DUHD ,I D VKRUW FLUFXLW LV PDLQWDLQHG WKH
FKDQQHO DIIHFWHG ZLOO HYHQWXDOO\ JR LQWR D WKHUPDO SURWHFW F\FOH XQWLO WKH VKRUW FLUFXLW KDV EHHQ UHPRYHG
9.5
AC mains voltage protection
,I WKH $& PDLQV YROWDJH LV RXWVLGH WKH RSHUDWLRQDO ZLQGRZ RYHU RU XQGHU YROWDJH WKH SRZHU VXSSO\ ZLOO
DXWRPDWLFDOO\ VKXW GRZQ :KHQ WKH PDLQV YROWDJH LV DERYH WKH PLQLPXP VWDUW YROWDJH DQG EHORZ LWV PD[LPXP
RSHUDWLQJ YROWDJH WKH DPSOLILHU ZLOO UHVWDUW
7KH WZR JUHHQ µ21¶ /('¶V LQGLFDWH ZKHQ WKH SRZHU VXSSO\ LV RSHUDWLQJ FRUUHFWO\
,W WDNHV D FRXSOH RI VHFRQGV WR VHOIFKHFN WKLV LV NQRZQ DV WKH VRIW VWDUW RU VORZ VWDUW VHTXHQFH WKH JDLQ ZLOO
VORZO\ DQG JUDGXDOO\ EH LQFUHDVHG EDFN WR WKH SUHYLRXVO\ VHW OHYHO DQG WKH IDQV ZLOO EORZ DW KLJK VSHHG EHIRUH JRLQJ
LQWR LGOH
All material © 2007. Martin Audio Ltd. Subject to change without notice.
PRINT
Output Limiter
&
Martin Audio – MA1.6s Amplifier
15
GUIDES
Advertisement
Table of Contents
