Kushandiswa kweASJ Residual Current Relay mune jenareta Set Project muMaldives

1.Project overview

Ichi chirongwa chiri muMaldives. Chinangwa cheyakasara ikozvino relay yakaiswa ndeyekuona yakasara ikozvino uye kuenzanisa yakasara ikozvino kukosha nehuwandu hwepasi. Kana kukosha kwezvino kwasara kwadarika kukosha kwehwaro, kunotumira chiratidzo chemagetsi-on-off (kuita kuti mechanical switch igumburwe kana acousto-optic alarm device itumire alarm) Residual current relay kazhinji ine low voltage circuit breaker kana low voltage contactor, etc yakasanganiswa yasara yazvino yekudzivirira mudziyo, inonyanya kuiswa kune ac 50 hz, yakatemerwa voltage 400 v uye pazasi peTT uye TN system yekuparadzira dunhu, inoshandiswa pasi pekudzivirira mhosva yekudzivirira dunhu remagetsi, kudzivirira kukuvara kwemidziyo kunokonzerwa nepasi pasi uye magetsi. tsaona yemoto, zvakare inogona kushandiswa kupa zvisina kunanga kubata kumunhu kuwana magetsi ekudzivirira njodzi yekudzivirira, uye nekudaro inoshandiswa zvakanyanya mune yakaderera voltage magetsi uye kugovera system.

2.Main kushandiswa kwekusara ikozvino relay

2.1 Dziviriro yeIsina kunanga Kubata Magetsi Shock

Iyo chiyero cheiyo indirect yekubata magetsi kuvhundutsa kudzivirira ndeyekudzima otomatiki magetsi. GB 13955" kuchengetedzwa kweasina kunanga kusangana negetsi rekuvhundutsa tsaona "inotema :" chiyero chikuru chekudzivirira kwenjodzi yemagetsi kuvhunduka kutora nzira yekudzivirira yekudzima otomatiki magetsi kudzivirira tsaona yekukuvara kunokonzerwa nekukuvara kwemagetsi. midziyo Kana iyo yekuvharisa yedunhu kukuvara kunokonzerwa nekukanganisa kwepasi. Zvinoenderana netsvagiridzo, kukosha kwakachengeteka kwekusangana voltage ndeye 50V. Nekuchengetedza kwemunhu, kana kutadza kuvharidzira kunoitika mune chero chikamu chemagetsi, kana iyo yekubata voltage ichipfuura 50V, zvinodikanwa kuti ubvise otomatiki chikamu chekutadza kwemagetsi mukati menguva yakatarwa. Iyo yepamusoro-ikozvino yekudzivirira mudziyo inoganhurwa nemagetsi edunhu nemidziyo uye neyayo kukosha kwekuita, uye haigone kudzima otomatiki magetsi. Iyo yakasara ikozvino yekudzivirira mudziyo haina kukanganiswa nemutoro wazvino uye inogona kushandiswa pamwe chete neyepamusoro-ikozvino yekudzivirira mudziyo weiyo isina kunangana yekudzivirira yemagetsi kuvhunduka.

2.2 Kudzivirirwa kwepasi pasi

Grounding iko kusangana pakati pe conductor mhenyu nepasi, goko resimbi rakadzika kana chikamu chakabatana pasi. Kutadza kwayo kunogona kutungamira mukukuvadzwa kwemagetsi ega ega uye kukuvara kwemidziyo, uye zvinogona kukonzera moto wemagetsi mumatambudziko akakomba. Ground fault dziviriro yaishandiswa kuchengetedzwa neyepamusoro-ikozvino kudzivirira mudziyo. Kana iko kukanganisa kwepasi kwakakura kudarika kukosha kwakagadziriswa kwepamusoro-ikozvino yekudzivirira chigadziro, dunhu rinokanganisa rinogurwa ne-over-current protection device.

MuTT system, mutsetse une hombe yakayerwa ikozvino uye yakareba yekugovera mutsara, yekumisa mhosva yeanogara conductor, isina kuchengetedzeka simbi yekumisa kukanganisa uye arc grounding kukanganisa muTN system inogona kuitika kuti chikanganiso chepasi chave kushoma pane kuseta ikozvino kwepamusoro-ikozvino kudzivirira. chiito, uye chidziviriro chepamusoro-chazvino hachiite. Residual yazvino yekudzivirira mudziyo, kana wedunhu breaker ine pasi pasi chengetedzo, inogona kuita zvakavimbika kuchengetedzwa kwepasi pasi.

2.3 Dziviriro yemoto yemagetsi

Moto wemagetsi unowanzo kukonzerwa nemagetsi mapfupi emagetsi, ayo anosanganisira simbi pfupi dunhu uye arc pfupi dunhu. Iyo yekutanga ipfupi dunhu pakati pemakondakita mhenyu (senge pakati pezvikamu, pakati pezvikamu uye N mitsara). Iko kukanganisa ikozvino inoverengwa mu kilo ampere. Kupisa kwepamusoro kuri nyore kukonzera insulation oxidation uye kupisa kwega.

Kunyangwe iyo njodzi yemoto yakakura, inogona kudzivirirwa neanopwanya edunhu uye fuse ane pfupi dunhu redziviriro, uye magetsi emagetsi anogurwa nekukasira kuita kwedunhu redunhu kudzivirira moto. Iyo yekupedzisira ndeye mhenyu conductor short circuit kusvika pasi, kazhinji arc senzira, kunyangwe iko kukanganisa kuri diki, asi kune rumwe rutivi, iyo arc inogara kwenguva yakareba, tembiricha yemuno yakakwira, zviri nyore kubatidza. zvinhu zvinobvira zvakapoteredza uye zvinokonzera moto. Nokudaro, njodzi yemoto inokonzerwa nearc short circuit yakakura kudarika iyo yesimbi pfupi. Mutambo wedunhu neinosara ikozvino chiito chekudzivirira basa rinogona kugura dunhu rekutsigira pasina kushanda kwepamusoro-ikozvino kudzivirira mudziyo kudzivirira moto wemagetsi unokonzerwa nearc short circuit.

3.ASJ Series yeResidual Current Relay

3.1 Model & Basa

3.2 Technical Parameters

3.3 Yakajairika Yekushandisa Schematic

4.Mifananidzo yekuiswa kweiyo yakasara ikozvino relay pane jenereta set project site

5.Summary

Acrel ASJ yakatevedzana yekusara yazvino relays yakashandiswa muzviitiko zvakawanda, senge indasitiri, yevagari, yepasi pevhu, yakangwara chivakwa uye zvichingodaro, iyo yakatamba yakanaka kudzivirira uye yakakodzera kushandiswa kwekusimudzira.