| Brand | ROCKWILL |
| Series | RHG |
| Rated Voltage | 126/145 kV |
| Rated Current | 2000A 2500A 3150 A |
| Rated Peak Withstand Current | 100 kA |
| Rated Frequency | 50/60 Hz |
The RHG-145 type gas-insulated metal-enclosed switchgear (hereinafter referred to as GIS) is a complete set of switchgear that integrates components such as circuit breakers, three-position switches, fast earthing switches, current transformers, voltage transformers, arresters, busbars, incoming and outgoing bushings or cable terminations into a earthed metal enclosure, and is filled with SF6 gas at a certain pressure as the insulating medium.
The GIS complies with the Chinese National Standard GB7674-2008 *"Gas-insulated metal-enclosed switchgear for rated voltages above 72.5 kV"* and meets the International Electrotechnical Commission Standard IEC 62271-203 *"High-voltage switchgear and controlgear – Gas-insulated metal-enclosed switchgear for rated voltages above 52 kV"*. All internal components conform to their respective national standards.
This GIS adopts a three-phase common tank design.
Based on secondary control configurations, it is categorized into:
| Rated Voltage | 126/145 kV | |
| Rated Frequency | 50/60 Hz | |
| Rated Current | 2000, 2500, 3150 A | |
| Rated Short-Time Withstand Current / Time | 40/4 kA/s | |
| Rated Peak Withstand Current | 100 kA | |
| Insulation Level | Rated Short-Duration Power-Frequency Withstand Voltage (1 min) | 230 kV (Earth/Phase-to-Phase); 230+73 kV (Across Disconnector) |
| Zero-Gauge Pressure Withstand Voltage (5 min) | 109 kV | |
| Rated Lightning Impulse Withstand Voltage (Peak) | 550 kV (Earth/Phase-to-Phase); 550+103 kV (Across Disconnector) | |
| Rated SF6 Gas Pressure / Minimum Functional Pressure (20°C) |
Circuit Breaker Chamber | 0.6/0.5 MPa |
| VT/Arrester Chamber | 0.5/0.4 MPa | |
| Other Chambers | 0.4/0.3 MPa | |
| SF6Gas Moisture Content | Circuit Breaker Chamber | ≤150 μL/L |
| Other Chambers | ≤250 μL/L | |
| Partial Discharge | ≤5 pC | |
| SF6 Gas Leakage Rate | ≤0.3 %/year | |
| Radio Interference Level | ≤500 μV | |
| Bay Width | 0.8 m | |
| Installation | Indoor or outdoor |
| Ambient temperature | -30 ~ +40°C (Applicable to busbars & bushings) |
| Altitude | 1000 m (Customizable) |
| Humidity | Daily average ≤95%
|
| Wind speed | ≤35 m/s (Wind pressure ≤700 Pa) |
| Solar irradiance | ≤0.1 W/cm² (at wind speed ≥0.5 m/s) |
| Seismic | Horizontal acceleration ≤0.4 g
|
| Ice coating thickness | ≤10 mm |
| Creepage distance | 25 mm/kV (Pollution Class III)
|
| Other Environmental Requirements | No flammable/explosive/chemical corrosion/strong vibration |
Cross section diagram and primary principle diagram of overhead incoming (outgoing) line bay
Ultra-low SF₆ leakage rate and long service life with lower maintenance costs. Full-lifecycle supporting services including installation accessories, tools, engineering drawings, and factory technician on-site guidance.
24/7 round-the-clock after-sales service, professional factory technicians provide on-site installation and commissioning guidance.
CT26 spring-operated circuit breaker with self-energy-type arc extinguishing technology. Rated short-duration withstand current: 40 kA. Ultra-low partial discharge and SF₆ leakage rate.
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