| Brand | ROCKWILL |
| Series | RHP |
| Rated maximum voltage | 40.5kV 72.5 kV 145 kV 170kV 245kV |
| Rated maximum current | ≤5000 A |
| Rated short circuit breaking current | 31.5-63 kA |
| Rated frequency | 50/60 Hz |
The RHP type HGIS electrical apparatus is a new type of high-voltage power equipment. It retains the advantages of GIS combined electrical apparatus, such as compactness, high reliability, and low operation and maintenance requirements, while innovatively retaining the busbar as a conventional AIS arrangement for onsite installation and connection.
This design effectively overcomes the drawbacks associated with traditional AIS equipment, including large footprint, numerous connection points, and high inspection and maintenance workloads.
It is suitable for 40.5kV up to 245kV transmission and distribution systems in power plants, substations, railway stations, ports, and large industrial and mining enterprises. It is particularly well-suited for spaceconstrained projects such as mountainous substations and urban substations, and can be installed indoors, outdoors, or on rooftops.
HGIS is a type of gas-insulated metal-enclosed switchgear that integrates the circuit breaker, disconnector/earthing switch combination, current transformer, and voltage transformer into a single unit.
This specific design confers the following key advantages over both conventional GIS and AIS:
High Operational Reliability & Minimal Maintenance: Requires very little maintenance, with an estimated maintenance-free service life of up to 25 years.
Simplified Outdoor Installation: Designed for direct outdoor installation with minimal civil engineering and electrical work, leading to a straightforward installation process.
Eco-Friendly with Low SF6 Usage: Consumes significantly less SF6 gas (only 20% of the amount used in a full GIS), making it a more environmentally friendly choice.
Low Life-Cycle Cost: Offers a lower total cost of ownership over its entire operational lifespan.
Compact, Lightweight & Resilient Design: Features a compact and lightweight construction (utilizing silicone rubber bushings and aluminum tanks) with excellent pollution resistance, hydrophobic properties, and high seismic withstand capability.
Rapid Deployment with Minimal Outage: The short installation time and reduced number of required power outages make it exceptionally well-suited for extension or retrofit projects in power plants and substations.
An HGIS unit is equipped with one three-position disconnector/earthing switch at each end of the circuit breaker. This configuration forms an independent, self-contained functional unit that operates without the need for any additional external three-position disconnector/earthing switches.
The HGIS employs a modular design philosophy. It can be customized with varying numbers of three-position disconnector/earthing switch modules to meet specific client requirements. Additionally, optional components such as voltage transformers (VTs) and surge arresters can be integrated.
RHP-40.5
| Item | Unit | Parameters |
|---|---|---|
| Rated maximum voltage | kV | 40.5 |
| Rated maximum current | A | ≤2000 |
| Rated frequency | Hz | 50/60 |
| First opening pole coefficient | - | 1.5 |
| Rated short circuit breaking current | kA | 31.5 |
| Rated short-circuit duration | s | 4 |
| Rated out of step breaking current | kA | 7.9 |
| Rated peak value withstand current | kA | 80 |
| Rated 1min power frequency withstand voltage (Dry/Wet) | kV | To ground 95 Break 118 |
| Rated lightning impulse voltage | kV | To ground 185 Break 215 |
| Operation sequence | - | O-0.3s-CO-180s-CO |
| Opening time | ms | 50±10 |
| Closing time | ms | 90±20 |
| Close-open time | ms | ≤100 |
| Main circuit resistance | μΩ | ≤150 |
| Rated SF6 gas pressure (20℃ gauge pressure) | Mpa | 0.5 |
| Alarm/blocking pressure(20℃ gauge pressure) | Mpa | 0.45/0.4 |
| SF6 annual gas leakage rate | % | ≤0.5 |
| Gas moisture content | Ppm(v) | ≤150 |
| Mechanical life | times | 6000 |
RHP-72.5
| Item | Unit | Parameters |
|---|---|---|
| Rated maximum voltage | kV | 72.5 |
| Rated maximum current | A | ≤3150 |
| Rated frequency | Hz | 50/60 |
| First opening pole coefficient | - | 1.5 |
| Rated short circuit breaking current | kA | 40 |
| Rated short-circuit duration | s | 4 |
| Rated out of step breaking current | kA | 10 |
| Rated peak value withstand current | kA | 100 |
| Rated 1min power frequency withstand voltage (Dry/Wet) | kV | To ground 140 Break 160 |
| Rated lightning impulse voltage | kV | To ground 325 Break 375 |
| Operation sequence | - | O-0.3s-CO-180s-CO |
| Opening time | ms | 32±7 |
| Closing time | ms | 85±10 |
| Close-open time | ms | ≤60 |
| Main circuit resistance | μΩ | ≤100 |
| Rated SF6 gas pressure (20℃ gauge pressure) | Mpa | 0.5 |
| Alarm/blocking pressure(20℃ gauge pressure) | Mpa | 0.55/0.5 |
| SF6 annual gas leakage rate | % | ≤0.5 |
| Gas moisture content | Ppm(v) | ≤150 |
| Mechanical life | times | 6000 |
RHP-145
| Item | Unit | Parameters |
|---|---|---|
| Rated maximum voltage | kV | 145 |
| Rated maximum current | A | ≤3150 |
| Rated frequency | Hz | 50/60 |
| First opening pole coefficient | - | 1.5 |
| Rated short circuit breaking current | kA | 40 |
| Rated short-circuit duration | s | 4 |
| Rated out of step breaking current | kA | 10 |
| Rated peak value withstand current | kA | 100 |
| Rated 1min power frequency withstand voltage (Dry/Wet) | kV | To ground 275 Break 315 |
| Rated lightning impulse voltage | kV | To ground 650 Break 750 |
| Operation sequence | - | O-0.3s-CO-180s-CO |
| Opening time | ms | 32±7 |
| Closing time | ms | 85±10 |
| Close-open time | ms | ≤60 |
| Main circuit resistance | μΩ | ≤100 |
| Rated SF6 gas pressure (20℃ gauge pressure) | Mpa | 0.5 |
| Alarm/blocking pressure(20℃ gauge pressure) | Mpa | 0.55/0.5 |
| SF6 annual gas leakage rate | % | ≤0.5 |
| Gas moisture content | Ppm(v) | ≤150 |
| Mechanical life | times | 6000 |
RHP-170
| Item | Unit | Parameters |
|---|---|---|
| Rated maximum voltage | kV | 170 |
| Rated maximum current | A | ≤4000 |
| Rated frequency | Hz | 50/60 |
| First opening pole coefficient | - | 1.3 |
| Rated short circuit breaking current | kA | ≤50 |
| Rated short-circuit duration | s | 4 |
| Rated out of step breaking current | kA | 10 |
| Rated peak value withstand current | kA | ≤125 |
| Rated 1min power frequency withstand voltage (Dry/Wet) | kV | To ground 325 Break 375 |
| Rated lightning impulse voltage | kV | To ground 750 Break 850 |
| Operation sequence | - | O-0.3s-CO-180s-CO |
| Opening time | ms | 32±7 |
| Closing time | ms | 85±10 |
| Close-open time | ms | ≤60 |
| Main circuit resistance | μΩ | ≤100 |
| Rated SF6 gas pressure (20℃ gauge pressure) | Mpa | 0.5 |
| Alarm/blocking pressure(20℃ gauge pressure) | Mpa | 0.55/0.5 |
| SF6 annual gas leakage rate | % | ≤0.5 |
| Gas moisture content | Ppm(v) | ≤150 |
| Mechanical life | times | 6000 |
RHP-245
| Item | Unit | Parameters |
|---|---|---|
| Rated maximum voltage | kV | 245 |
| Rated maximum current | A | ≤5000 |
| Rated frequency | Hz | 50/60 |
| First opening pole coefficient | - | 1.3 |
| Rated short circuit breaking current | kA | ≤63 |
| Rated short-circuit duration | s | 4 |
| Rated out of step breaking current | kA | 7.9 |
| Rated peak value withstand current | kA | ≤158 |
| Rated 1min power frequency withstand voltage (Dry/Wet) | kV | To ground 460 Break 530 |
| Rated lightning impulse voltage | kV | To ground 1050 Break 1200 |
| Operation sequence | - | O-0.3s-CO-180s-CO |
| Opening time | ms | 50±10 |
| Closing time | ms | 90±20 |
| Close-open time | ms | ≤100 |
| Main circuit resistance | μΩ | ≤150 |
| Rated SF6 gas pressure (20℃ gauge pressure) | Mpa | 0.5 |
| Alarm/blocking pressure(20℃ gauge pressure) | Mpa | 0.45/0.4 |
| SF6 annual gas leakage rate | % | ≤0.5 |
| Gas moisture content | Ppm(v) | ≤150 |
| Mechanical life | times | 6000 |
| Item | Unit | Parameter |
|---|---|---|
| Altitude | m | <1000* |
| Ambient Temperature | °C | -40 to +40** |
| Maximum Daily Temperature Difference | °C | 30 |
| Maximum Relative Humidity | % | 100 |
Note :
For installations at altitudes exceeding 1000 meters, the manufacturer must be consulted during the ordering process to implement necessary insulation reinforcement measures.
When operating in regions with ambient temperatures of -40°C, measures must be taken to prevent the liquefaction of SF6 gas.
Ingress Protection (IP) Rating & Pollution Severity Class：The HGIS is designed with an IP54 protection rating and is suitable for a Class IV polluted atmosphere.
Construction Type：The HGIS features a three-phase, segregated tank construction.
RHP-40.5
RHP-72.5
RHP-245
| Air temperature |
Maximum temperature: +40°C;
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Minimum temperature: -40°C
|
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| Humidity | Daily average humidity 100%. |
| Above sea level | Maximum installation altitude: 1000m. |
RHP HGIS integrates circuit breaker, three‑position disconnector‑earthing switch, CT/VT into gas‑filled tank units, while retaining conventional open‑type AIS busbars for on‑site connection. Compared with full GIS, it consumes only 20% SF₆ gas, lowers equipment investment. Compared with conventional AIS, it greatly reduces footprint, connection points and maintenance workload. It balances compactness, cost and installation flexibility.
The modular gas‑tank main units feature high reliability with up to 25‑year maintenance‑free service life. Annual SF₆ leakage rate ≤0.5%. Mechanical life reaches 6000 times. Only open‑type busbar part needs regular inspection. Overall maintenance workload is far lower than traditional AIS. For altitude over 1000 m or‑40 °C extreme cold area, please inform us for customized insulation or anti‑liquefaction measures.
Yes. Rockwill provides OEM & ODM service for RHP‑type HGIS. We select qualified regional partners with solid high‑voltage engineering capability and local after‑sales capacity. We focus on technical‑oriented cooperation rather than simple resale business.
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