TRANSFORMER BUSHINGS

Chii chinonzi bushings?

Magetsi bushings akakosha emhando dzakasiyana dzemidziyo yemagetsi senge transformers, shunt reactor uye switchgears. Midziyo iyi inopa inodiwa insulative chipingamupinyi pakati peiyo mhenyu conductor uye conductive muviri wemidziyo yemagetsi pane inogoneka pasi. Iri basa rakakosha rinobvumira kuti bushings itakure ikozvino pamhepo yakakwira kuburikidza neiyo conductive barriers yemidziyo yakavharirwa. JIEOZU bushings dzakagadzirirwa kudzivirira kutadza kwemagetsi kubva kuflashover kana kupuncture, kudzikisira kupisa kukwira nechiyero chazvino, uye kushingirira masimba emagetsi kubva pakuremerwa kwetambo uye kuwedzera kupisa.

Iko kuvharwa kwemukati kwebhushi kunofanirwa kumira kusimba kwemagetsi iyo ichatsungirira mubasa. Aya madhindindi anokonzereswa neiyo voltage inogona mutsauko kubva kune ine simba conductor kuenda kune yakadzikwa zvinhu iyo bushing inopfuura. Mune epakati uye yakakwira voltage maapplication, iyo yemukati yekuvharisa inofanirwawo kudzikamisa kutanga kwechidimbu discharge (PD) iyo inogona kuderera zvishoma nezvishoma zvivakwa uye kugona kweiyo insulation.

Iyo bushings yekunze insulation ine chaiyo dhizaini zvinhu senge nhamba yemashedhi uye creepage kureba kuti ipe kupatsanurwa pakati peyakasimbiswa HV yekubatanidza nzvimbo uye yepasi inogoneka kunze kwechikamu. Chinangwa chezvimiro izvi ndechekudzivirira yakaoma arcing (flashover) uye creep (kudonha). Dry Arcing, yakatemerwa neBIL, inoda chinhambwe chakakwana kuti bhazi rikwanise kumirisana nemagetsi kubva pakuchinja uye kurohwa nemheni. Zviitiko izvi zvinogona kukonzera kutadza kweflashover uko arc yemagetsi inoita kubva kuHV conductor yakananga pasi kana chinhambwe chisina kukwana voltage. Kukambaira (Leakage) kunoitika kana kusvibiswa kunowedzera pamusoro pegwenzi uye kunopa nzira inoitisa yezvino yekutevera pamusoro. Kusanganisirwa kwemashedhi mukugadzira gwenzi zvinobudirira kunowedzera kureba kwegwenzi pakati peHV terminal uye pasi kudzivirira kurasikirwa kwecreepage.

JIEZOU inogadzira mukati & kunze epoxy bushings ye switchgear, transformer & simba midziyo yekushandisa pamakirasi ese akaderera uye epakati voltage. Mabhucha edu akagadzirwa uye akaedzwa kuti asangane neCSA, IEC, NEMA, uye IEEE zviyero.

Low Voltage Bushings akatarwa mavoltages anosvika 5kV/60kV BIL uye Medium Voltage bushings akayerwa kuti asvike ku46kV/250kV BIL.

JIEZOU inogadzira Epoxy bushings, inova inotsiva yakakwana yePorcelain Bushings uye ine zvakawanda zvakanaka. Ona chinyorwa chedu paEpoxy Bushings vs Porcelain Bushings

Kutsvaga ma transformer

A transformer bushing mudziyo unodzivirira unobvumira ine simba, inotakura-inotakura conductor kuti ipfuure nepakati petangi rakadzika re transformer. A Bar-Type Bushing ine conductor yakavakirwa mukati, nepo Draw-Lead kana Draw-Rod Bushing ine gadziriro yekuti kondakita akaparadzana aiswe nepakati payo. Solid (yakawanda mhando) bushings uye capacitance-graded bushings (condenser type) ndiyo miviri mikuru yekuvaka bushing:

Mabhurashi akasimba ane porcelain kana epoxy insulator anowanzo shandiswa senzvimbo dzekubatanidza kubva kune yakaderera voltage inotenderedza divi kuenda kunze kwetransformer.
Capacitance-graded bushings inoshandiswa pakakwirira system voltages. Kuenzaniswa nemakwenzi akasimba, iwo akaoma kunzwisisa mukuvaka kwawo. Kuti utsungirire kushushikana kwemagetsi emumunda wepamusoro anogadzirwa pamagetsi akakwira, capacitance-graded bushings inoshongedzerwa nemukati capacitance-graded nhovo, iyo yakadzikwa pakati pepakati inotakura conductor uye yekunze insulator. Chinangwa chezvivharo izvi zvinogadzirisa ndechekuderedza kubudiswa kwechidimbu nehutungamiri hwemunda wemagetsi kumativi epakati conductor, kuitira kuti kushushikana kwemunda kuwedzere kuenzana mukati mekuputika kwebhushi.

Ruzivo rwechigadzirwa-1.2kV Plastic Molded Tri-clamp Secondary Bushing