Surge protector hluav taws xob kev ua haujlwm yuav tsum tau ua 1. Tiv thaiv kev sib cuag ncaj qha Thaum qhov siab tshaj plaws ua haujlwm tsis tu ncua Uc ntawm qhov siv tau surge tiv thaiv yog siab dua ac rms tus nqi ntawm 50V, cov no yuav tsum ua raws li cov cai hauv qab no. Txhawm rau tiv thaiv kev sib cuag ncaj qha (tsis tuaj yeem nkag mus rau cov khoom siv hluav taws xob), lub surge tiv thaiv yuav tsum raug tsim los kom nws cov khoom nyob tsis tuaj yeem kov thaum nruab rau hauv ib txwm siv. Ntxiv rau qhov kev tiv thaiv hluav taws xob raug cais raws li kev siv tsis tau, lub surge tiv thaiv yuav tsum tau tsim kom, thaum ntsia thiab xaim rau kev siv ib txwm, cov khoom nyob yuav tsum siv tsis tau, txawm tias tom qab dismantling qhov chaw uas tuaj yeem tshem tawm yam tsis muaj cuab yeej. Kev sib txuas ntawm qhov chaw nres tsheb hauv av thiab txhua qhov chaw nkag mus tau txuas nrog nws yuav tsum yog qhov tsis muaj impedance. Kev ua raws cai yog kuaj los ntawm kev xeem. 2. Residual current (residual current) I_PE Rau txhua qhov surge tiv thaivs nrog PE terminals, I_PE yuav tsum tau ntsuas nrog tag nrho cov terminals ntawm lub surge tiv thaiv txuas nrog lub hwj chim mov ntawm lub reference test voltage (UREF) raws li cov chaw tsim tshuaj paus cov lus qhia Kev ua raws cai yog kuaj los ntawm kev xeem, uas tsis muaj feem xyuam rau SPDs txuas nrog N-PE nkaus xwb. 3. Voltage tiv thaiv qib Up Qhov limiting voltage ntawm lub surge tiv thaiv should not exceed the voltage protection level specified by the manufacturer. Compliance is checked by tests. 4. Action load test When the maximum continuous working voltage Uc is applied, the surge tiv thaiv shall be able to withstand the specified discharge current without unacceptable changes in its characteristics. In addition, the voltage switch-type surge tiv thaiv or combined surge tiv thaiv shall at least be able to cut off the freewheeling current of the dry rated short-circuit current I_SCCR. Kev ua raws cai yog kuaj los ntawm kev xeem.

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Post lub sij hawm: Apr-20-2022