I. Basic Concepts of Distribution Mabhokisi
Bhokisi rekugovera chinhu chakakosha musimba remagetsi rinoshandiswa kugovera pakati pesimba remagetsi, kutonga kwemaseketi uye kudzivirira kwemidziyo yemagetsi. Inogovera simba remagetsi kubva kune masimba emagetsi (akadai semashanduri) kune zvakasiyana-siyana zvemagetsi emagetsi uye inobatanidza mabasa ekudzivirira akadai sekuremerwa, kupfupika uye kubuda.

Main kushandiswa:

Kugovera uye kutonga kwemagetsi emagetsi (akadai semagetsi ekuvhenekesa uye magetsi emagetsi).

Kudzivirirwa kwedunhu (kuwandisa, kupfupika kwedunhu, kuvuza).

Tarisa mamiriro edunhu (voltage uye ikozvino kuratidza).

Ii. Kurongwa Kwemabhokisi Ekugovera
Nemashandisirwo emamiriro ezvinhu:

Bhokisi rekugovera remumba: Idiki muhukuru, ine yakadzikira nhanho yekudzivirira, kubatanidza kuchengetedzwa kwekuvuza, mhepo switch, nezvimwe.

Bhokisi rekugovera maindasitiri: Huru hukuru, yakakwirira yekudzivirira (IP54 kana pamusoro), inotsigira yakaoma yedunhu kutonga.

Bhokisi rekugovera kunze: Isingapindi mvura uye isina guruva (IP65 kana pamusoro), inokodzera nzvimbo dzakavhurika-mhepo.

Nenzira yekuisa:

Yakafumurwa yekuisa mhando: Yakananga kumadziro, nyore kuisa.

Yakavanzika mhando: Yakamisikidzwa mumadziro, inonakidza zvinoyevedza asi kuvakwa kwakaoma.

Nechimiro chechimiro:

Fixed type: Zvikamu zvakaiswa nenzira yakagadziriswa, nemutengo wakaderera.

Dhirowa-mhando (modular kugovera bhokisi): Modular dhizaini, yakanakira kugadzirisa uye kuwedzera.

Iii. Mamiriro Ezvakaita Mabhokisi Ekugovera
Bhokisi muviri:

Material: Metal (inotonhora-yakakungurutswa simbi ndiro, Stainless simbi) kana isiri-simbi (engineering plastiki).

Chiyero chekudzivirira: IP kodhi (senge IP30, IP65) inoratidza guruva uye kugona kwemvura.

Zvinhu zvemagetsi zvemukati:

Circuit breakers: Kuwedzeredza / kupfupi-kutenderera kuchengetedzwa (kwakadai semhepo switch, molded kesi circuit breakers).

Disconnector: Cheka nemaoko magetsi.

Leakage dziviriro mudziyo (RCD): Inoona kuvuza ikozvino uye nzendo.

Magetsi mita: Kuyera simba remagetsi.

Contactor: Inodzora kure nekubuda kwedunhu.

Surge mudziviriri (SPD): Inodzivirira kubva pakurohwa nemheni kana kuwandisa.

Zvishandiso zvekubatsira:

Mabhazi (mhangura kana aluminium mabhasi), zvidhinha zvidhinha, marambi echiratidzo, mafeni ekutonhodza, nezvimwe.

Iv. Technical Parameters yebhokisi rekugovera
Yakatemerwa ikozvino: yakadai se63A, 100A, 250A, iyo inofanira kusarudzwa zvichienderana nesimba rose remutoro.

Rated voltage: Kazhinji 220V (imwe-chikamu) kana 380V (matatu-chikamu).

Dziviriro giredhi (IP) : senge IP30 (guruva-proof), IP65 (mvura-proof).

Short-circuit kutsungirira: Nguva yekumira pfupi-yedunhu ikozvino (yakadai se10kA/1s).

Kupwanya simba: Iyo yakanyanya kukanganisa ikozvino iyo inotyora wedunhu inogona kucheka zvakachengeteka.

V. Kusarudza Nhungamiro yeKugovera Mabhokisi
Zvinoenderana nerudzi rwekutakura:

Mwenje wedunhu: Sarudza 10-16A miniature yedunhu breaker (MCB).

Zvishandiso zveMota: Thermal relays kana mota-chaiyo inopwanya maseketi inoda kuenzaniswa.

Nzvimbo dzepamusoro-senzwi (senge yekugezera): Chishandiso chekudzivirira kudonha (30mA) chinofanira kuiswa.

Capacity calculation

Zvose zvazvino ndeye ≤ iyo yakarongwa ikozvino yebhokisi rekugovera × 0.8 (kuchengetedza margin).

Semuenzaniso, iyo yakazara mutoro simba ndeye 20kW (matatu-chikamu), uye ikozvino inenge 30A. Inokurudzirwa kusarudza 50A bhokisi rekugovera.

Kuchinjika kwezvakatipoteredza

Humid nharaunda: Sarudza Stainless simbi bhokisi muviri + yakakwirira yekudzivirira giredhi (IP65).

Yepamusoro-tembiricha nharaunda: Makomba ekupisa kupisa kana mafeni anodiwa.

Zvinodiwa Zvakawedzerwa:

Chengetedza 20% yenzvimbo isina chinhu kuti ufambise kuwedzera kwemaseketi matsva gare gare.

Vi. Installation uye Maintenance Precautions
Zvinodiwa pakuiswa:

Nzvimbo yacho yakaoma uye inofefetera zvakanaka, kure nezvinhu zvinopfuta moto.

Bhokisi racho rakanyatsodzika pasi kudzivirira njodzi yekudonha kwemagetsi.

Madimikira eruvara rwewaya (waya mhenyu dzvuku/yero/girinhi, waya isina divi rebhuruu, waya yepasi yero yegirini).

Maintenance key points:

Gara uchitarisa kana wiring yakasununguka kana oxidized.

Chenesa guruva (kudzivisa mapfupi mafupi).

Edza mudziyo wekudzivirira (sekudzvanya bhatani rekudzivirira bvunzo bhatani kamwe chete pamwedzi).

Vii. Matambudziko Anowanikwa uye Mhinduro
Kufamba kakawanda

Chikonzero: Kuwedzeredza, kupfupika kwedunhu kana kuvuza.

Troubleshooting: Bvisa mutsara wemutoro nemutsara uye tsvaga yakanganisa dunhu.

Kudonha kweiyo leakage yekudzivirira mudziyo

Zvinogoneka: Insulation yakakanganiswa yedunhu, kubuda kwemagetsi kubva kumidziyo.

Kurapa: Shandisa megohmmeter kuyedza kudzivirira kudzivirira.

Bhokisi riri kupisa.

Chikonzero: Kuwedzeredza kana kusabatana zvakanaka.

Solution: Deredza mutoro kana kuomesa zvivharo zvekupedzisira.

Viii. Mitemo Yekuchengetedza
Inofanirwa kuenderana nemitemo yenyika (yakadai seGB 7251.1-2013 "Low-voltage Switchgear Assemblies").

Pakuisa nekuchengetedza, simba rinofanira kugurwa uye kushanda kunofanirwa kuitwa nenyanzvi dzemagetsi.

Zvinorambidzwa kushandura matunhu emukati pakuda kana kubvisa zvidziviriro zvekudzivirira.