Gine-gineta Gida na Ring Main Unit na Gas-Insulated na 12kV da Ba Ta Yiwuwar Mata

1. Kasuwanci Masu Kyau

1.1 Maimaita Koyarwa

Kungiyar Tattalin Kirki na Sinar tarayya yana taimakawa wajen kare mutane da kuma kula-kula ta hanyar tattalin kirki don in samun abin da ke cikin gasar (2030) da kuma gagarwa (2060). Dukunan gas-insulated ring main units masu kyau sun fi siffar wannan hankali. An yi koyarwa mai tsawo na 12kV integrated environmentally friendly gas-insulated ring main unit da ya haɗa teknologiyyar vacuum interrupter da three-position disconnectors da kuma vacuum circuit breakers. A yi koyarwar da SolidWorks don 3D modeling da kuma kasuwancin modular (gas tank, pressure relief chambers, cabinet body, instrument rooms). Abin da ya haɗa sun hada da makarantar metal-enclosed compartments (mechanism room, circuit breaker room, cable room, instrument room), kowane da shi ne na yanayi pressure relief channels. Koyarwar ta haɗa dukukan masu kyau da kuma common box configurations.

1.2 Integritoci Three-Position Disconnector da Vacuum Circuit Breaker

Integritoci three-position disconnectors da vacuum circuit breakers shine muhimmanci a cikin koyarwar, da ya haɗa interconnected upper three-position disconnectors da lower two-position circuit breaker devices. Three-position disconnector yana yi aiki a ground, closed, da isolation positions, idan circuit breaker yana yi aiki a open/closed states. Isolation blade support frame yana amfani da material nylon na kyau da kyau da ma'ana da kuma kafin karama. Mubea disc spring technology take bayyana contact pressure.

Uniform cover on moving contacts yana ba da uniformity ta electric field da kuma kudan partial discharge. Insulating covers on three-phase bushings yana zama interphase insulation. Idan a yi testing, duka a yi haske-dutsi don in ba da mechanical characteristics (engagement depth, bounce, three-phase synchronization, operating speed). Vacuum circuit breaker yana da solid sealed pole columns mounted with four screws.

Vacuum interrupter's terminal yana haɗa rotation center for the disconnector blade, with Z-shaped plastic lever arm utilizing lever principle for operation. Copper busbars with vulcanized surfaces yana connect the circuit breaker's lower terminals. Kamar Figure 1, integritoci koyarwar ta haɗa vacuum interrupter as core component determining overall reliability, with contact structure and arc extinguishing method being critical design elements.

Don in samun miniaturization da kuma yakin da za su da, an yi amfani da longitudinal magnetic field cup-shaped contacts with coil windings and iron cores. Unlike transverse magnetic fields, longitudinal fields increase the transition current from diffuse to constricted arcs, offering minimal electrical wear, extended service life, and superior breaking capacity. The rotating magnetic field generated by three-phase AC combines with the cup-shaped contact's longitudinal field to form eddy currents that reduce arc voltage and distribute the arc evenly across the anode surface. This design increases short-circuit breaking capacity from 20kA to 25kA at identical volume.

1.3 Switch Operating Mechanism

Switch operating mechanism, mounted directly on the insulation tank front, drives both vacuum circuit breaker and three-position disconnector via direct shaft connections without intermediate components. This design minimizes vacuum circuit breaker opening time to prevent contact erosion. The mechanism supports both manual and electric operation with energy storage via overrunning clutch principle. The three-position disconnector employs torsion spring drive with coaxial rotation design ensuring three-phase synchronization and reliable grounding switch performance. Its dual operation holes separately control grounding and isolation functions.

1.4 Main Circuit

Main circuit—comprising cable bushings, disconnector blades, vacuum interrupter contacts, flexible connections, and busbars—is sealed within a stainless steel tank using lip seals for dynamic parts and O-rings for static sealing, filled with 0.02 MPa nitrogen or dry air. The integrated longitudinal design of the three-position disconnector and vacuum circuit breaker enables modular withdrawal. Phase-to-phase distances are maintained at 150mm for proper insulation. The vacuum interrupter's terminal serves as the rotation center for the disconnector blade, with Z-shaped plastic lever arms translating operating mechanism motion to contact movement.

1.5 Gas Tank and Production Line

Gas tank design prioritized precision manufacturing and airtightness. Laser cutting ensures burr-free stainless steel components while robotic welding guarantees seam integrity and mechanical strength. Production employs linear layout with track transport vehicles moving between workstations to optimize workflow efficiency.

2 Insulation Analysis

2.1 Three-Position Disconnector Insulation

The knife-switch type three-position design provides visible disconnection points and reliable grounding. Using high-strength nylon material for the rotating shaft and aluminum equalizing covers on blade heads enhances field uniformity. Simulation and testing confirmed insulation performance withstands 90kV lightning impulse voltage.

2.2 Overall Ground Insulation

Analysis focused on critical areas: phase-to-phase and phase-to-tank clearances (minimum 125mm center distance), and insulating components. Strategic placement of solid insulation in high-field areas and gas insulation in low-field areas optimizes field distribution. Additional measures include epoxy encapsulation of contacts, improved Z-arm materials, fiber insulating rods, and shielding covers at busbar connections to prevent field concentration.

3 Conclusion

Waɗanda gida na gas mai kyau a kan ziyarwa ta hanyar kula da tashin tsabta da gas mai kyau, tana da damu daban-daban, ba sa shiga sakamakonin ba, yawan cikin fita, da kuma damu daban-daban. Duk fayawar da suka da ci gaba a wuraren magunguna suna fi shirya a kan ziyarwa ta stainless steel, wanda ya shafi zuwa masu amfani a kan tushen da ke gida da kuma tushen da ke gaba, sama da switch stations, distribution rooms, da box-type substations. An sanar da shi don samun lissafin karamin maza ta 50Hz, 12kV, wanda ya ba da shirya abin da za a iya amfani a kan tushen da ke gida, tushen da ke gaba, tattalin arziki, tattalin aiki, tattalin yanayin, da kuma tattalin yanayin masu inganci, da kuma alamar kyau a kan tattaunawa, tattalin yankin, da kuma dalilin kyau.