Txoj cai ntawm surge tiv thaiv ntaus ntawv

Taw qhia

Surge tiv thaiv Device (SPD), tseem hu ua“xob laim ntes”or “Overvoltage tiv thaiv Device”, yog ib qho khoom siv tseem ceeb hauv kev tiv thaiv xob laim ntawm cov khoom siv hluav taws xob.Nws txoj haujlwm yog txwv tsis pub dhau lub sijhawm dhau-voltage rau hauv cov kab hluav taws xob thiab cov teeb liab kis tau tus mob mus rau qhov ntau yam uas cov khoom siv lossis lub kaw lus tuaj yeem dais, lossis tso tawm cov hluav taws xob muaj zog tam sim no rau hauv av, tiv thaiv cov cuab yeej tiv thaiv lossis kev puas tsuaj los ntawm kev poob siab. .

Daim ntawv thov SPD feem ntau yog kev tiv thaiv hluav taws xob tsawg-voltage fais fab mov thiab kev faib khoom thiab cov teeb liab kis kab kev tiv thaiv ntawm cov ntaub ntawv hluav taws xob.Tus qub yog los suppress xob laim electromagnetic pulse cuam tshuam (EMP-RRB- los ntawm lub hwj huam mov Circuit Court, thiab tom kawg yog mus suppress EMP emp cuam tshuam los ntawm lub teeb liab Circuit Court. Ob qho khoom tiv thaiv yog cov khoom siv hluav taws xob, cov khoom siv.

Kev sib xyaw

Hom thiab qauv ntawm aSurge tiv thaiv DeviceNws txawv rau ntau lub hom phiaj, tab sis nws yuav tsum muaj tsawg kawg yog ib qho kev txwv tsis pub muaj hluav taws xob.Cov khoom tseem ceeb ntawm Surge Protection Devices yog hlau oxide varistor (MOV), silicon avalanche diode los yog TRANSORB diodes, gas-filled raj, thiab lwm yam.

1) MOV yog ib qho zoo surge suppressor, feem ntau yog siv los tiv thaiv kev puas tsuaj rau cov cuab yeej, tab sis nws yuav tsum tau lub sij hawm teb, uas txhais tau hais tias ib tug luv luv lub sij hawm ntawm ncov tam sim no yuav nkag mus rau hauv cov cuab yeej ua ntej lub chaw pib Circuit Court qhib.Yog li ntawd, cov cuab yeej tiv thaiv Surge tsim los ntawm MOV tsis tsim nyog los tiv thaiv cov cuab yeej rhiab nrog microprocessor.Cov qauv no yog tam sim no siv nyob rau hauv 90% ntawm tam sim no surge protectors nyob rau hauv lub lag luam.

2) lub avalanche diode los yog TRANSORB diodes teb sai dua MOV thiab rhiab heev rau transients, tab sis lub peev xwm siab tshaj plaws ntawm lub caij no tseem tsawg dua li qhov nruab nrab ntawm MOV.

3) lub raj ntim roj muaj lub sijhawm teb ntev, tab sis nws tuaj yeem nqus tau ntau lub zog, thiab feem ntau yog tsim los ua ib qho“Qhov chaw kawg”Kev ntsuas los tiv thaiv AC surge tam sim no, tiv thaiv kev nkag ntawm lub zog hluav taws xob tsis tau lim tawm los ntawm theem dhau los.

Nws ua haujlwm li cas

Txij li thaum nws'saSurge tiv thaiv Device,lwm's pib nrog surge.Surge kuj hu ua surge, raws li lub npe implies yog dhau qhov kev khiav hauj lwm voltage ntawm instantaneous overvoltage.Qhov tseem ceeb, kev nce siab yog ib qho kev ua pa nyuaj uas tshwm sim hauv ob peb lab ntawm ib thib ob thiab tuaj yeem tshwm sim los ntawm cov khoom siv hnyav, luv luv Circuit Court, hloov hluav taws xob lossis lub cav loj.Cov khoom lag luam nrog cov surge arresters zoo nqus lub zog sai sai los tiv thaiv cov khoom sib txuas los ntawm kev puas tsuaj.

Raws li txoj cai ua haujlwm, Surge Protection Device tuaj yeem muab faib ua hom hloov, hom kev txwv hluav taws xob, hom shunt lossis hom choke:

1) hloov hom: nws ua hauj lwm raws li ib tug siab impedance thaum tsis muaj ib ntus overvoltage, tab sis sai li sai tau raws li nws teb rau xob laim transient overvoltage, nws impedance mam li nco dheev hloov mus rau tus nqi qis, cia xob laim tam sim no hla.Cov cuab yeej siv hauv cov khoom siv xws li: Discharge Gap, gas-filled tube, thyristor, thiab lwm yam.

2) voltage limiting hom: nws ua hauj lwm raws li qhov siab impedance thaum tsis muaj ib ntus overvoltage, tab sis nws impedance txo nrog qhov nce ntawm inrush tam sim no thiab voltage, thiab nws cov yam ntxwv tam sim no thiab voltage yog xav tsis thoob.Cov cuab yeej siv hauv cov khoom siv xws li zinc oxide, varistors, transient-voltage-suppression diode, avalanche diode, thiab lwm yam.

3) cais los yog choke hom

Shunt hom: nyob rau hauv parallel nrog cov cuab yeej tiv thaiv, nws nthuav tawm impedance qis rau xob laim impulse thiab siab impedance rau qhov ua hauj lwm zaus;hom choke: nyob rau hauv series nrog cov cuab yeej tiv thaiv, nws nthuav tawm siab impedance rau xob laim impulse, tab sis mus rau qhov ua hauj lwm zaus nthuav tawm qhov impedance tsawg.Cov cuab yeej siv hauv cov khoom siv xws li choke coils, high-pass filter, low-pass filter, thiab quarter-wavelength short circuits.