Daga cewa da 12kV, 24kV yana ba da zinariya masu kyau, ya kawo gajerar karami, kuma ana yi amfani da ita da ma'adanin harkokin kasuwanci.
SF₆ wani zafi mai karfi da yake da muhimmanci na gajerar karami a matsayin 20,000 daga CO₂. Ya kamata a yi nasara kan tashin bayanai; saboda haka, gabasun karamin tsakiyar karami bai sauki da amfani da SF₆ a matsayin zafi mai karami.
Don gabasun karami, zafun da suka fi sani suke nufin waɗannan da ba suka da SF₆ a matsayin zafi mai karami ko mai lalacewa. Misali sun hada da zafun da ake samu daga alam (kamar nitrogen da carbon dioxide), gas mixtures, da zafun da ake gina.
Tsunan da ya faruwa don gabasun karami mai zafi mai fi sani shine ya ci gaba a kan abin da za a tabbatar da karami. Idan gabasun karamin tsakiyar karami da zafi mai fi sani a 12kV suna da rike, amma modelon 24kV suna da ƙungiyoyi ƙarin. Wannan shine saboda tsarin talabinsa a cikin ƙasar ba ta da ƙarin, kuma tsarin karamin da ke shiga yana da ƙarin—kawai mafi girman ƙungiyoyi mai sarrafa gabasun karami da ke buƙata don tattalin arziki suna yi amfani da hakan.
A cikin tsari, gabasun karamin 24kV zai iya duba tun daga cikin hanyoyin da na:
Karamin karami mai sauƙi: Wannan yana taimakawa busbar da ya ci gaba a kan abin da za a tabbatar da karami. Yana iya sanar da fassara mai sauƙi ko karamin gas tank don ci gaba a kan abin da za a tabbatar da karami.
Yawan tsari: Tabbatar da tsari daga 0.04MPa zuwa 0.14MPa yana ba da taimakawa waɗannan abin da za a tabbatar da karami da fassara mai sauƙi, amma babban abin da za a yi shine tushen fassarar lalacewar da 24kV-rated.
Kuma, zai iya amfani da C4/C5 synthetic gas mixed with CO₂, domin karamin karamin da ke da shi na da mutane da SF₆. Sanar da tsarin karamin RMUs mai SF₆ yana iya taimakawa cikin abin da za a tabbatar da karami a 24kV. Amma, C4/C5 tare da zafi mai karfi—kafin da yake da muhimmancin global warming potential (GWP) na 1/20 daga SF₆. Kuma, yana kusa da zafun da suka lafiya a kan lalacewar, wanda ba ta shahara da tattalin arziki.
Fassara mai sauƙi ga birnin gabasun karami yana da shirya ne daga impulse withstand voltage:
Don equipment 24kV, impulse withstand voltage shine 125kV, da fassara mai sauƙi na 220mm (ko 95mm idan an yi amfani da 3M heat-shrinkable sleeves da BPTM round busbars).
Don equipment 12kV, impulse withstand voltage shine 75kV, da fassara mai sauƙi na 120mm (ko 55mm idan an yi amfani da 3M sleeves da BPTM busbars).
Don side-mounted switch units in RMUs, abubuwan fassara mai sauƙi ga karamin karami mai sauƙi suna da shirya ne.
Wadannan 24kV solid-insulated ring main units na farko sun haɗa da SVS na Eaton da products na Xirui. Saboda switches na Xirui da ake sanya don kasuwancin kasar suna da ƙarin lokaci—yanayi da switch ya kunshi lokacin da ya ci ko lokacin da ya ɗaya—wannan tsari bai sauki da tsohon tsarin China don lokacin da uku da tushen ingantaccen kontrollo, kuma ya kamata a ɗaukar lokacin da ɗaya a kan biyu.
Yadda ake iya samun product miniaturization, cost-effectiveness, da environmental adaptability yana ci gaba a kan hanyoyin tattalin gabasun karamin 24kV eco-friendly gas-insulated ring main units. Solid composite insulation yana da rike mai yawa kuma ba ta iya taimakawa waɗannan abin da za a tabbatar da karamin isolation breaks. Duk da haka, saboda alternative gases kamar dry air da nitrogen suna da karamin karami mai basu, fassara mai sauƙi da ground distance suna da shirya ne sama da natural air, yana nufin ≥220mm. Wannan yana buƙatar a yi ƙarin hoton rotary three-position switches, kuma linear-motion switches suna da rashin ya ɗaukar hoton ko karamin width. Amfani da double-break isolation and grounding switches zai iya taimakawa waɗannan abin da za a tabbatar da isolation switches mai yawa.
Don a ba da gas filling pressure, yana da shirya ne a kan enclosure strength. Amfani da aluminum alloy cylindrical structure yana iya taimakawa dimension optimization, uniform electric field, da heat dissipation mai kyau. Busbars na gida suna da shirya ne a triangular configuration, kuma three-position switch da vacuum interrupter suna da shirya ne a vertical, wanda yana iya taimakawa waɗannan abin da za a tabbatar da spatial dimensions da small size da high power capacity.
