Tsim qauv ntawm Disconnectors rau siab -Voltage Surge Arresters

1. Core Functions thiab Design Objectives

Kev ua haujlwm li qub: Txuas nrog cov surge arrester, lub disconnector nthuav tawm tsis tshua muaj kev tiv thaiv thiab ua rau cov hluav taws xob hluav taws xob, tsis muaj kev cuam tshuam tsis zoo rau qhov system voltage thiab kev tiv thaiv tus yam ntxwv.

Kev tiv thaiv txhaum: Thaum tus neeg ntes raug kev laus, cov dej noo nkag los yog tawg luv luv -circuit, fais fab -frequency short-circuit current flows through the circuit. Lub disconnector ua tam sim ntawd los txiav tawm hauv av davhlau ya nyob twg, cais cov khoom siv tsis raug thiab tiv thaiv kev sib tsoo thib ob xws li kev ntes neeg tawg thiab kab tripping.

Qhov taw qhia yuam kev: Lub cim pom kev pom yuav tshwm sim tom qab ua haujlwm, ua rau cov neeg ua haujlwm saib xyuas sai sai thiab hloov cov neeg ntes tsis raug.

2. Hom Lub Npe thiab Cov Cai Ua Haujlwm

2.1 Thermal Fuse Hom (Tswj siv rau kev faib khoom thiab qis-voltage systems)

Lub xeev ib txwm: Cov dej xau tam sim no me me, ua rau muaj cua sov tsis txaus. Qhov txuas fuse tseem nyob twj ywm thiab lub voj voog kaw.

Fault state: Fais fab-frequency short-circuit current (tens to hundreds of amperes) dhau los ntawm qhov txuas fuse. Joule kub nce qhov kub thiab txias qhov txuas. Tsav los ntawm lub caij nplooj ntoos hlav quab yuam los yog lub ntiajteb txawj nqus, lub tripping mechanism ua haujlwm rau disconnect lub grounding davhlau ya nyob twg.

2.2 Thermal Explosion Type (Mainstream rau nruab nrab thiab siab-voltage systems, suav nrog cov kab hluav taws xob sib txuas / capacitor hom)

Lub xeev ib txwm: Tus neeg ntes tau tswj hwm qhov kev tiv thaiv siab, yog li tsuas yog ib feem me me ntawm tam sim no ntws los ntawm qhov sib npaug ntawm cov resistor. Qhov sib txawv ntawm electrode tseem tsis yog - conductive thiab Circuit Court raug kaw.

Fault state: Tus ntes yog luv luv -circuited, thiab lub hwj chim loj- zaus tam sim no ntws los ntawm qhov sib npaug ntawm cov resistor. Lub resistor heats li thiab qhov voltage nce, ua rau tawg ntawm electrode sib txawv. Qhov tshwm sim hluav taws xob arc ignites thermal explosive element. Cov roj tsim tawm thawb lub piston lossis tus pin tua hluav taws kom txiav tawm lub voj voog sai.

2.3 Electromagnetic Hom (Tshiab-cov khoom tsim tawm)

Lub xeev ib txwm: Cov hlau nplaum ruaj khov muab nqus kom cov neeg raug kaw, thiab tsis muaj tam sim no ntws los ntawm lub kauj.

Fault state: luv-circuit tam sim no dhau los ntawm lub kauj thiab ua kom rov qab magnetic teb los tiv thaiv qhov nqus ntawm cov hlau nplaum ruaj khov. Cov kev sib cuag sib cais thiab lub hauv paus Circuit Court raug txiav.

3. Kev txiav txim siab tsim qauv tseem ceeb

Tam sim no sib phim: Xaiv lub disconnector raws li qhov siab tshaj plaws tam sim no ntawm qhov sib tw ntes, kom ntseeg tau tias kev poob qis thiab tiv thaiv kev ua haujlwm tsis zoo.

Kev sib koom ua ke ntawm rwb thaiv tsev: Lub zog dielectric ntawm lub kaw lus yuav tsum tsis txhob qis dua qhov ntsuas qhov ntsuas hluav taws xob ntawm tus ntes kom tsis txhob ntog flashover.

Cov yam ntxwv ua haujlwm:

Rau hom thermal fuse: Ua kom zoo rau \\(I^2t\\) tus yam ntxwv los lav txhim khu kev qha fusing nyob rau hauv luv luv -circuit tam sim no.

Rau thermal tawg hom: Precisely tsim qhov sib txawv breakdown voltage thiab explosive zog mus cuag millisecond -level tripping.

Mechanical ntseeg tau: Pom pom kev hloov pauv lossis qhia pom tom qab ua haujlwm kom tsis txhob muaj kev txiav txim siab; xyuas kom hloov tau yooj yim yam tsis muaj kev cuam tshuam los yog tsis sib haum xeeb thaum lub sijhawm ua haujlwm ntev -.

Environmental adaptability: Muaj peev xwm tiv taus qhov kub thiab txias ntawm -40℃mus rau +70 degree, nrog rau cov av noo thiab muaj kuab paug rau kev ua haujlwm ruaj khov rau sab nraum zoov mus sij hawm ntev.

4. Kev Ua Haujlwm Sib Nqus (Ntawm Thermal Explosion Hom ua piv txwv)

Ib txwm ua haujlwm ntawm tus neeg ntes: Lub disconnector yog conductive nrog microampere - theem to tam sim no thiab tseem tsis ua haujlwm.

Arrester tsis ua haujlwm: Internal luv-circuit tshwm sim, thiab kiloampere-theem zog- zaus luv-circuit tam sim no ntws los ntawm Circuit Court.

Disconnector teb: Lub parallel resistor heats li → electrode sib txawv lov → hluav taws xob arc ignites lub thermal explosive caij → lub grounding davhlau ya nyob twg yog disconnected instantly.

Kev cais tawm tsis raug: Lub faulty arrester yog cais tawm ntawm daim phiaj hluav taws xob los tiv thaiv kev tawg thiab kab tawm mus.

Kev Qhia Txog Kev Kho Mob: Lub disconnector pops tawm los yog tso tawm los qhia txog qhov txhaum rau kev hloov raws sij hawm.

5. Zuag qhia tag nrho Design Logic