SPD(Cov Khoom Siv Tiv Thaiv Surge, surge protector) feem ntau yog siv los tiv thaiv kev overvoltage transient los ntawm xob laim lossis kev ua haujlwm hloov pauv grid los ntawm cov khoom siv puas tsuaj. Cov nqi thiab qhov chaw siv tau ntawm SPDS ua los ntawm cov ntaub ntawv sib txawv thiab cov qauv sib txawv.

Cov khoom siv tseem ceeb ntawm SPD yog zinc oxide varistor (MOV), uas pheej yig thiab teb tau sai. Nws siv dav hauv kev tiv thaiv cov tsev nyob, cov tsev lag luam, cov txee faib khoom thiab cov khoom siv hauv kev lag luam. Tus nqi ntawm MOV hom SPD rau kev faib khoom qis-voltage feem ntau yog txij li kaum txog pua pua yuan.

SPD siv cov raj xa roj (GDT) muaj peev xwm nqa tam sim no siab thiab kev ua haujlwm rwb thaiv tsev, thiab nws tsim nyog rau kev tiv thaiv cov kab tam sim no tsis muaj zog hauv cov chaw sib txuas lus, cov chaw khaws ntaub ntawv, cov kab ke kev ruaj ntseg, thiab lwm yam. Nws tus nqi feem ntau siab dua li cov khoom MOV ib txwm muaj.

Cov khoom lag luam SPD siab kawg yuav siv cov qauv MOV + GDT ua ke. Qee cov khoom kuj tseem muaj cov khoom siv thermal trip, qhov qhia txog qhov txhaum thiab cov haujlwm ceeb toom deb, uas muab kev nyab xeeb thiab kev ntseeg siab dua. Lawv tsim nyog rau cov chaw tseem ceeb xws li tsev kho mob, cov tshuab fais fab, kev thauj mus los ntawm tsheb ciav hlau, cov chaw tsim hluav taws xob photovoltaic thiab cov tshuab tswj kev lag luam, nrog rau tus nqi txij li ntau pua txog ntau txhiab yuan.

Rau cov tsev ua haujlwm ib txwm, tsev nyob thiab khw muag khoom, tus qauv MOV hom SPDS tuaj yeem xaiv tau. Rau cov cheeb tsam uas muaj kev ua ub no xob laim ntau zaus, chav sib txuas lus, chaw khaws ntaub ntawv thiab cov haujlwm tseem ceeb hauv kev lag luam, nws raug pom zoo kom xaiv cov SPDS sib xyaw lossis muaj peev xwm tam sim no siab kom txhim kho kev tiv thaiv xob laim thiab kev tiv thaiv overvoltage ntawm lub kaw lus thiab xyuas kom meej tias cov khoom siv ua haujlwm ruaj khov mus sij hawm ntev.

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