I. Cov Ntsiab Lus Tseem Ceeb ntawm Cov Thawv Faib Khoom
Lub thawv faib hluav taws xob yog ib lub cuab yeej tseem ceeb hauv lub zog fais fab uas siv rau kev faib hluav taws xob hauv nruab nrab, tswj cov voj voog thiab kev tiv thaiv cov khoom siv hluav taws xob. Nws faib hluav taws xob los ntawm cov chaw muab hluav taws xob (xws li transformers) mus rau ntau yam khoom siv hluav taws xob thiab koom ua ke cov haujlwm tiv thaiv xws li overload, luv luv Circuit Court thiab xau.

Cov kev siv tseem ceeb:

Kev faib tawm thiab kev tswj hwm lub zog hluav taws xob (xws li kev muab hluav taws xob rau teeb pom kev zoo thiab cov khoom siv hluav taws xob).

Kev tiv thaiv Circuit Court (overload, luv Circuit Court, to.)

Saib xyuas qhov xwm txheej ntawm lub voj voog (qhov voltage thiab tam sim no).

II. Kev faib tawm ntawm cov thawv faib khoom
Los ntawm cov xwm txheej ntawm daim ntawv thov:

Lub thawv faib khoom hauv tsev: Me me, nrog rau qib kev tiv thaiv qis, kev sib xyaw ua ke tiv thaiv kev xau, cua hloov, thiab lwm yam.

Lub thawv faib khoom lag luam: Muaj peev xwm loj, qib kev tiv thaiv siab (IP54 lossis siab dua), txhawb nqa kev tswj hwm Circuit Court nyuaj.

Lub thawv faib khoom sab nraum zoov: Tsis muaj dej thiab tsis muaj hmoov av (IP65 lossis siab dua), tsim nyog rau cov chaw qhib huab cua.

Los ntawm txoj kev teeb tsa:

Hom kev teeb tsa uas raug pom: Ncaj qha kho rau ntawm phab ntsa, yooj yim rau kev teeb tsa.

Hom zais: Muab tso rau hauv phab ntsa, nws zoo nkauj tab sis kev tsim kho yog qhov nyuaj.

Los ntawm daim ntawv qauv:

Hom ruaj khov: Cov khoom sib xyaw raug teeb tsa rau hauv txoj kev ruaj khov, nrog tus nqi qis.

Hom tub rau khoom (lub thawv faib khoom modular): Tsim qauv modular, yooj yim rau kev saib xyuas thiab nthuav dav.

Iii. Cov Qauv Sib Xyaws ntawm Cov Thawv Faib Khoom
Lub cev lub thawv:

Khoom siv: Hlau (txias-kuav hlau phaj, stainless hlau) los yog tsis yog hlau (engineering yas).

Qib kev tiv thaiv: IP codes (xws li IP30, IP65) qhia txog lub peev xwm tiv taus plua plav thiab dej.

Cov khoom siv hluav taws xob sab hauv:

Cov cuab yeej hluav taws xob: Kev tiv thaiv overload/luv-circuit (xws li cov cua hloov, cov cuab yeej hluav taws xob molded case).

Disconnector: Manually txiav tawm lub hwj chim.

Cov cuab yeej tiv thaiv kev xau (RCD): Nrhiav tau cov hluav taws xob xau thiab kev poob.

Lub ntsuas hluav taws xob: Ntsuas lub zog hluav taws xob.

Contactor: Tswj tau qhov qhib thiab kaw ntawm lub voj voog.

Tus tiv thaiv hluav taws xob ntau dhau (SPD): Tiv thaiv xob laim lossis hluav taws xob ntau dhau.

Cov khoom pabcuam:

Cov busbars (tooj liab lossis txhuas busbars), cov thaiv davhlau ya nyob twg, teeb qhia, kiv cua txias, thiab lwm yam.

Iv. Cov Kev Ntsuas Txuj Ci ntawm lub thawv faib khoom
Tam sim no ntsuas: xws li 63A, 100A, 250A, uas yuav tsum tau xaiv raws li tag nrho lub zog ntawm lub nra.

Qhov ntsuas hluav taws xob: Feem ntau 220V (ib theem) lossis 380V (peb theem).

Qib tiv thaiv (IP): xws li IP30 (plua plav-pov thawj), IP65 (dej-pov thawj).

Kev ua haujlwm luv luv: Lub sijhawm los tiv taus tam sim no luv luv (xws li 10kA / 1s).

Lub peev xwm tawg: Qhov siab tshaj plaws ntawm qhov txhaum tam sim no uas lub circuit breaker tuaj yeem txiav tawm tau zoo.

V. Phau Ntawv Qhia Xaiv Rau Cov Thawv Faib Khoom
Raws li hom kev thauj khoom:

Lub voj voog teeb pom kev zoo: Xaiv lub tshuab hluav taws xob me me 10-16A (MCB).

Cov khoom siv lub cev muaj zog: Cov relays thermal lossis cov circuit breakers tshwj xeeb rau lub cev muaj zog yuav tsum tau sib phim.

Cov chaw uas muaj kev rhiab heev (xws li chav dej): Yuav tsum muaj lub cuab yeej tiv thaiv kev xau (30mA).

Kev suav peev xwm

Tag nrho cov tam sim no yog ≤ qhov tam sim no ntsuas ntawm lub thawv faib khoom × 0.8 (qhov kev nyab xeeb).

Piv txwv li, tag nrho lub zog thauj khoom yog 20kW (peb-theem), thiab tam sim no yog kwv yees li 30A. Nws raug pom zoo kom xaiv lub thawv faib khoom 50A.

Kev hloov pauv ib puag ncig

Ib puag ncig noo noo: Xaiv lub thawv stainless hlau + qib kev tiv thaiv siab (IP65).

Ib puag ncig kub heev: Yuav tsum muaj qhov cua sov lossis kiv cua.

Cov kev cai ntxiv:

Tseg 20% ​​ntawm qhov chaw khoob kom yooj yim ntxiv cov voj voog tshiab tom qab.

Vi. Kev Ceeb Toom Txog Kev Teeb Tsa thiab Kev Txij Nkawm
Cov kev cai rau kev teeb tsa:

Qhov chaw yuav tsum qhuav thiab muaj cua nkag tau zoo, deb ntawm cov khoom siv uas yooj yim hlawv.

Lub thawv tau grounded ruaj khov kom tiv thaiv kev pheej hmoo ntawm hluav taws xob xau.

Cov lus qhia xim ntawm cov hlau (cov hlau nyob liab/daj/ntsuab, cov hlau nruab nrab xiav, cov hlau hauv av daj ntsuab).

Cov ntsiab lus tseem ceeb ntawm kev saib xyuas:

Tshawb xyuas seb cov xov hlau puas xoob lossis oxidized.

Ntxuav cov hmoov av (kom tsis txhob muaj luv luv circuits).

Sim cov khoom siv tiv thaiv (xws li nias lub pob sim tiv thaiv kev xau ib hlis ib zaug).

Vii. Cov Teeb Meem thiab Kev Dais Teeb Meem Feem Ntau
Kev mus ncig ntau zaus

Ua rau: Overload, luv luv Circuit lossis to.

Kev daws teeb meem: Tshem cov kab thauj khoom los ntawm kab thiab nrhiav qhov Circuit Court uas puas lawm.

Kev cuam tshuam ntawm lub cuab yeej tiv thaiv kev xau

Tej zaum yuav muaj: Kev rwb thaiv hluav taws xob puas tsuaj, hluav taws xob tawm ntawm cov khoom siv.

Kev Kho Mob: Siv lub megohmmeter los ntsuas qhov tsis kam ntawm cov rwb thaiv tsev.

Lub thawv kub dhau lawm.

Ua rau: Muaj ntau dhau los yog tsis sib cuag zoo.

Kev daws teeb meem: Txo qhov hnyav lossis zawm cov thaiv davhlau ya nyob twg.

Viii. Cov Cai Kev Nyab Xeeb
Nws yuav tsum ua raws li cov qauv hauv tebchaws (xws li GB 7251.1-2013 "Low-voltage Switchgear Assemblies").

Thaum txhim kho thiab tswj xyuas, yuav tsum txiav hluav taws xob thiab kev ua haujlwm yuav tsum tau ua los ntawm cov kws tshaj lij hluav taws xob.

Nws raug txwv tsis pub hloov kho cov voj voog sab hauv ntawm qhov xav tau lossis tshem tawm cov khoom siv tiv thaiv.