Yuav Ua Li Cas Xaiv Cov Khoom Tiv Thaiv Surge (SPDs) Kom Yog.

Cov khoom tiv thaiv kev kub ntxhov muaj pes tsawg pawg?

Hom 1 (Hom Kev Hloov Hluav Taws Xob)

• Kev Ua Haujlwm:
  Feem ntau siv los tso cov dej ntws loj (10 / 350μs waveform) los ntawm kev tawm tsam ncaj qha lossis kev cuam tshuam xob laim.
  Feem ntau siv rau ntawm qhov rooj nkag loj ntawm cov tsev (cheeb tsam hloov pauv ntawm LPZ0 mus rau LPZ1).
• Txoj Cai Ua Haujlwm:

Impedance siab hauv lub xeev ib txwm muaj: 

Thaum tsis muaj surge, SPD tseem nyob hauv lub xeev siab-impedance, tsis cuam tshuam rau lub circuit.
Impedance qis thaum lub sijhawm ua haujlwm:

Thaum lub zog hluav taws xob nce siab tshaj qhov txwv (piv txwv li, 4kV), lub raj xa roj sab hauv (GDT) lossis qhov sib txawv ntawm lub txim hluav taws xob tawg, tsim txoj hauv kev qis-impedance kom tso tawm cov hluav taws xob ntawm kaum tawm kA tam sim ntawd.
Tom qab ntawd arc extinguishing: Tom qab qhov kev nce siab ploj mus, GDT rov qab mus rau lub xeev siab-impedance los ntawm nws tus kheej rov qab los.

• Cov Cheebtsam Tseem Ceeb:

Cov Raj Tso Pa (GDT):Ua los ntawm kev ionization ntawm inert roj.
Qhov Sib Txawv Hluav Taws Xob:Tso tawm los ntawm kev tawg ntawm huab cua, nrog rau lub peev xwm tswj tau tam sim no (tuaj yeem tshaj 100kA).

Hom 2 (Hom Txwv Hluav Taws Xob)

• Kev Ua Haujlwm:

Tiv thaiv kev cuam tshuam los ntawm xob laim thiab kev hloov pauv overvoltages (8 / 20μs waveform).

Siv rau hauv cov vaj huam sib luag faib khoom.

• Txoj Cai Ua Haujlwm:

Tus yam ntxwv impedance nonlinear: 

Thaum lub zog hluav taws xob nce siab, lub impedance sab hauv (MOV) poob qis heev, clamping lub zog hluav taws xob mus rau qib nyab xeeb (piv txwv li, Up ≤ 1.5kV).

Kev tso tawm tas mus li: 

Lub MOV tuaj yeem tso tawm cov hluav taws xob nruab nrab (20–40kA) ntau zaus, tab sis cov hluav taws xob siab tuaj yeem ua rau nws txoj kev ua haujlwm poob qis.

• Cheebtsam Tseem Ceeb:

Cov Hlau Oxide Varistor (MOV):Muaj cov khoom me me zinc oxide (ZnO), ib lub cuab yeej semiconductor uas rhiab rau voltage.

Hom 3 (Kev Tiv Thaiv Ua Ke lossis Kev Tiv Thaiv Zoo)

• Kev Ua Haujlwm

Cov lus teb sai:Siv TVS diodes lossis MOV + TVS kev sib xyaw ua ke nrog lub sijhawm teb ≤1ns.

Lub zog clamping qis heev (piv txwv li, Up ≤ 0.8kV), ua kom muaj kev nyab xeeb ntawm cov khoom siv rhiab heev.

Cheebtsam tseem ceeb:

Kev Tiv Thaiv Hluav Taws Xob Ib Ntus (TVS) diode:Siv PN junction avalanche effect rau kev teb sai heev tab sis muaj peev xwm tswj tau tam sim no tsawg (

Kev xaiv cov khoom siv tiv thaiv hluav taws xob (SPD) zoo yog qhov tseem ceeb heev. Koj yuav tsum xaiv ib qho li cas rau ntau qhov xwm txheej sib txawv?

1.Txhais cov Kev Cai Tiv Thaiv

1.1 Txheeb xyuas cov chaw uas muaj hluav taws xob ntau dhau

Xob laim ncaj qha (piv txwv li, tsoo lub tsev):  Yuav tsum tau Hom 1 SPD (10/350μs waveform).

Xob laim los yog kev hloov pauv hluav taws xob ntau dhau (piv txwv li, kev hloov pauv ntawm lub grid, kev pib/kaw cov khoom siv): Yuav tsum tau hom 2 lossis hom 3 SPD (8/20μs waveform).

1.2 Txheeb Xyuas Cov Cheeb Tsam Tiv Thaiv (LPZ)

LPZ0 → LPZ1 cheeb tsam (piv txwv li, qhov hluav taws xob tseem ceeb):

 Hom 1 lossis Hom 1 + 2 hybrid SPD.

LPZ1 → LPZ2 cheeb tsam (piv txwv li, vaj huam sib luag faib khoom hauv pem teb):

Hom 2 SPD.

LPZ2 → LPZ3 cheeb tsam (piv txwv li, khoom siv pem hauv ntej):

Hom 3 lossis precision SPD.

2.Kev Xaiv Cov Qauv Tseem Ceeb

2.1Qhov Siab Tshaj Plaws Ua Haujlwm Txuas Ntxiv Mus (Uc)

2.1.1 Yuav tsum siab dua li qhov ntsuas hluav taws xob ntawm lub kaw lus (piv txwv li, rau lub kaw lus 385V, xaiv Uc ≥ 385V).

2.2.2 Xav txog qhov kev hloov pauv ntawm lub grid (±10~20%).

2.2Qib Kev Tiv Thaiv Voltage (Saum)

2.2.1 Qis dua muab kev tiv thaiv zoo dua tab sis yuav tsum phim cov khoom siv tiv thaiv lub zog hluav taws xob.

2.2.2 Txoj cai dav dav: Nce ≤ 80% ntawm qhov hluav taws xob ntawm cov khoom siv (piv txwv li, yog tias cov khoom siv tuaj yeem tswj tau 2.5kV, xaiv Nce ≤ 2.0kV).

2.3 Lub Peev Xwm Tswj Xyuas Tam Sim No (Hauv / Imax)

• Hom 1: Hauv ≥ 12.5kA (10 / 350μs waveform).
• Hom 2: Lub vaj huam sib luag faib khoom tseem ceeb: Imax ≥ 40kA (8/20μs).

Vaj huam sib luag faib khoom: Imax ≥ 20kA (8 / 20μs).

• Hom 3: Hauv ≥ 5kA (ua ke nthwv dej).

2.4 Lub Sijhawm Teb

Cov SPD txheem: ≤25ns.

Rau cov khoom siv precision, xaiv cov kev xaiv sai dua (piv txwv li, TVS diodes, ≤1ns).

3.Kev Xaiv Los Ntawm Daim Ntawv Thov

3.1Cov Txheej Txheem Muab Fais Fab

3.1.1 Vaj Huam Sib Luag Faib Khoom Tseem Ceeb: Hom 1+2 hybrid SPD (piv txwv li, Imax = 100kA, Up ≤ 2.5kV).

3.1.2 Vaj Huam Sib Luag Muab Faib Tawm: Hom 2 SPD (piv txwv li, Imax = 40kA, Up ≤ 1.8kV).

3.1.3 Cov Khoom Siv Kawg: Hom 3 lossis lub qhov (socket-mounted SPD) (piv txwv li, Up ≤ 1.2kV).

3.2 Cov Kab Teeb Liab/Kev Sib Txuas Lus

3.2.1 Siv cov teeb liab SPD tshwj xeeb, cov hom interface sib phim (piv txwv li, RJ45, RS485).

Ua tib zoo saib xyuas qhov kis tau tus nqi thiab qhov poob ntawm kev ntxig (yog tias koj siv Gigabit network, xaiv tus qauv sib xws nrog zaus siab)

3.3 Lub Tshuab PV/DC

Xaiv DC SPDs nrog Uc ≥ 1.2 × qhov hluav taws xob siab tshaj plaws ntawm lub kaw lus.