Tidzawaukitsira mphamvu bwino kwa dziko

N'chifukwa chiyani sitiyenera mota chitetezo dera breakers MPCB

qqq

 

Kodi: Maginito galimoto dera breakers

www 

breakers dera izi kuteteza mbewu ku madera lalifupi malire a kumatula maluso ndi mwa akapsa maginito (imodzi gawo). Maginito dera kumatula zonse mtengo kuyambira pachiyambi: chimodzi maginito choyambitsa adzakhala imodzi kutsegula mizati onse.

Pakuti otsika mafunde yochepa dera, dera breakers ntchito mofulumira kuposa mafyuzi. chitetezo Izi complies ndi IEC 60947-2 muyezo. Kuti athyole yochepa dera panopa bwino, pali imperatives zitatu:

·  Early kudziwika panopa olakwika,

·  Rapid kulekana kwa anzanu, ndi

·  Breakage wa yochepa dera panopa.

AC Motors - kutetezeka madera lalifupi

Lililonse  galimoto magetsi  ali malire opaleshoni. Overshooting malire awa adzawononga ndi kachitidwe izo amayendetsa, zotsatira yomweyo kukhala shutdown ntchito ndi zomvetsa. A dera lalifupi ndi mwachindunji kukhudzana pakati pa mfundo ziwiri za angakwanitse magetsi:

- izituluka mosinthana panopa : gawo ndi gawo kukhudzana, gawo ndi ndale kukhudzana, gawo ndi nthaka kukhudzana kapena kukhudzana pakati windings mu yangayo,
- Direct current: contact between two poles or between the ground and the pole insulated from it.

Angathandize angapo zimayambitsa: kuwonongeka kwa varnish chimateteza ndi ochititsa, lotayirira, wosweka kapena anavula mawaya kapena zingwe, zitsulo matupi akunja, kuchita madipoziti (fumbi, chinyezi, etc.), seepage ya madzi kapena madzi ena kuchititsa, cholakwika Kulumikizana mu msonkhano kapena kukonza.

A zotsatira lalifupi dera funde mwadzidzidzi panopa amene angafikire kangapo zana panopa ntchito mkati milliseconds. A dera lalifupi zingathe kusokoneza kwambiri modetsa kuwononga zida. Iwo kufanizidwa ndi zochitika ziwiri.

 

matenthedwe chodabwitsa

A chodabwitsa matenthedwe lolingana mphamvu anamasulidwa mu dera magetsi anawoloka ndi lalifupi dera panopa  Ine kwa nthawi T zochokera chilinganizo I 2 T ndi chimaonetsera A 2 m. Amenewa matenthedwe zingachititse:

·  Kusungunuka kwa ojambula wochititsa,

·  Kuwonongedwa kwa zinthu ikukhudzana mu bimetal kulandirana ngati kugwirizana ndi mtundu 1,

·  Generation wa arcs magetsi,

·  Calcination a chimateteza zakuthupi,

·  Moto mu zipangizo.

·  Mafyuzi , amene kuswa dera ndi kusungunuka ndipo ayenera m'malo pambuyo pake,

·  Maginito dera breakers  zomwe basi kuswa dera ndi chokha amafuna kukhala Yambitsaninso.

Short-dera chitetezo akhoza kumangidwa mu zipangizo multifunction monga galimoto sitata chitetezo ndi contactor breakers.

Matanthauzo ndi makhalidwe

Makhalidwe waukulu zipangizo yochepa dera chitetezo ndi:

·  Angachite mphamvu : mtengo wapatali kwambiri mu Akuti yochepa dera panopa kuti chipangizo chitetezo akhoza kuswa pa voteji anapatsidwa,

·  Mphamvu kutseka : mtengo wapatali kwambiri chipangizo chitetezo angafikire ku voteji ake oveteredwa zinthu mwasankha. Kutsekera Mtengo K nthawi yopuma mphamvu monga tikuonera tebulo pansipa.

Yopuma mphamvu (BC)

φ Ko

Potseka mphamvu (CC)

4.5kA <BC <6kA

0,7

1.5 BC

6kA <BC <10kA

0.5

1.7 BC

10kA <BC <20kA

0,3

2 BC

20kA <BC <50kA

0,25

2.1 BC

50kA <BC

0.2

2.2 BC

Yopuma ndi kutseka ubongo kwa breakers dera ndi  IEC 60947-2 muyezo

Mafyuzi

Mafyuzi kuchita gawo-ndi-gawo (osakwatira mzati) chitetezo ndi mphamvu mkulu yopuma pa buku otsika. Kuchepetsa I2t ndi electrodynamic nkhawa (Icrête).

Iwo wokwera:

·  Pa zogwiriziza wakupambulika dzinache fuseholders,

·  Kapena isolators mu malo mwake ndipo links.

eee

Onani kuti chizindikiro ulendo makatiriji lama fuyusi akhoza basi anatumizanso lamya kwa zonse mzati kusinthitsa chipangizo (zambiri galimoto ulamuliro contactor) kuletsa ntchito singlephase pamene iwo kwakukulu.

The mafyuzi ntchito chitetezo galimoto ali achindunji kuti iwo tiyeni mwa  overcurrents  chifukwa magnetising panopa pamene Motors ndi anazimitsa pa. Iwo sali oyenera kutetezedwa ku zimamuchulukira (mosiyana gG mafyuzi) kotero kuti zimamuchulukira kulandirana ayenera zidzawonjezedwa kwa galimoto magetsi dera. Ambiri, kukula ayenera kukhala pamwamba chabe mokwanira katundu atsopano a galimoto ndi.


Post time: Aug-13-2018

WhatsApp Online Chat !