| Brand | ROCKWILL |
| Model NO. | Hybrid Gas Insulated Switchgear up to 145kV |
| Rated voltage | 145kV |
| Rated normal current | 2000A |
| Rated short circuit breaking current | 31.5kA |
| Series | RHP |
Product overview
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 on-site 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 to145kV and below transmission and distribution systems in power plants, substations, railway stations, ports, and large industrial and mining enterprises. It is particularly well-suited for space-constrained projects such as mountainous substations and urban substations, and can be installed indoors, outdoors, or on rooftops.
Product Component

Mian features
Genuine Solution to Operational Reliability Challenges in Disconnector/Earthing Switches;
Advanced Self-Blast Interruption and Modular Structure for Enhanced Reliability;
The elimination or significant reduction of disc-type insulators for enhanced reliability;
The application of specialized manufacturing techniques reduces the number of flanges, thereby minimizing the potential for gas leakage;
Externally Mounted CT for enhanced safety and reliability;
Compact Structure and Flexible Layout;
Relatively more economical than AIS.
Technical Parameters
RHP-40.5
N |
Item |
Unit |
Parameters |
1 |
Rated maximum voltage |
kV |
40.5 |
2 |
Rated maximum current |
A |
≤2000 |
3 |
Rated frequency |
Hz |
50/60 |
4 |
First opening pole coefficient |
|
1.5 |
5 |
Rated short circuit breaking current |
kA |
31.5 |
6 |
Rated short-circuit duration |
s |
4 |
7 |
Rated out of step breaking current |
kA |
7.9 |
8 |
Rated peak value withstand current |
kA |
80 |
9 |
Rated 1min power frequency withstand voltage (Dry/Wet) |
kV |
To ground 110 |
Break 118 |
|||
10 |
Rated lightning impulse voltage |
kV |
To ground 215 |
Break 215 |
|||
11 |
Operation sequence |
|
O-0.3s-CO-180s-CO |
12 |
Opening time |
ms |
50±10 |
13 |
Closing time |
ms |
90±20 |
14 |
Close-open time |
ms |
≤100 |
15 |
Main circuit resistance |
μΩ |
≤150 |
16 |
Rated SF6 gas pressure (20℃gauge pressure) |
Mpa |
0.5 |
17 |
Alarm/blocking pressure(20℃gauge pressure) |
Mpa |
0.45/0.4 |
18 |
SF6 annual gas leakage rate |
% |
≤0.5 |
19 |
Gas moisture content |
Ppm(v) |
≤150 |
20 |
Mechanical life |
times |
6000 |
RHP-72.5
N |
Item |
Unit |
Parameters |
1 |
Rated maximum voltage |
kV |
72.5 |
2 |
Rated maximum current |
A |
≤3150 |
3 |
Rated frequency |
Hz |
50/60 |
4 |
First opening pole coefficient |
|
1.5 |
5 |
Rated short circuit breaking current |
kA |
40 |
6 |
Rated short-circuit duration |
s |
4 |
7 |
Rated out of step breaking current |
kA |
10 |
8 |
Rated peak value withstand current |
kA |
100 |
9 |
Rated 1min power frequency withstand voltage (Dry/Wet) |
kV |
To ground 275 |
Break 315 |
|||
10 |
Rated lightning impulse voltage |
kV |
To ground 650 |
Break 750 |
|||
11 |
Operation sequence |
|
O-0.3s-CO-180s-CO |
12 |
Opening time |
ms |
32±7 |
13 |
Closing time |
ms |
85±10 |
14 |
Close-open time |
ms |
≤60 |
15 |
Main circuit resistance |
μΩ |
≤100 |
16 |
Rated SF6 gas pressure (20℃gauge pressure) |
Mpa |
0.5 |
17 |
Alarm/blocking pressure(20℃gauge pressure) |
Mpa |
0.55/0.5 |
18 |
SF6 annual gas leakage rate |
% |
≤0.5 |
19 |
Gas moisture content |
Ppm(v) |
≤150 |
20 |
Mechanical life |
times |
6000 |
RHP-145
N |
Item |
Unit |
Parameters |
1 |
Rated maximum voltage |
kV |
145 |
2 |
Rated maximum current |
A |
≤3150 |
3 |
Rated frequency |
Hz |
50/60 |
4 |
First opening pole coefficient |
|
1.5 |
5 |
Rated short circuit breaking current |
kA |
40 |
6 |
Rated short-circuit duration |
s |
4 |
7 |
Rated out of step breaking current |
kA |
10 |
8 |
Rated peak value withstand current |
kA |
100 |
9 |
Rated 1min power frequency withstand voltage (Dry/Wet) |
kV |
To ground 275 |
Break 315 |
|||
10 |
Rated lightning impulse voltage |
kV |
To ground 650 |
Break 750 |
|||
11 |
Operation sequence |
|
O-0.3s-CO-180s-CO |
12 |
Opening time |
ms |
32±7 |
13 |
Closing time |
ms |
85±10 |
14 |
Close-open time |
ms |
≤60 |
15 |
Main circuit resistance |
μΩ |
≤100 |
16 |
Rated SF6 gas pressure (20℃gauge pressure) |
Mpa |
0.5 |
17 |
Alarm/blocking pressure(20℃gauge pressure) |
Mpa |
0.55/0.5 |
18 |
SF6 annual gas leakage rate |
% |
≤0.5 |
19 |
Gas moisture content |
Ppm(v) |
≤150 |
20 |
Mechanical life |
times |
6000 |
Dimension
40.5kV

72.5kV

145kV

The voltage covers 40.5kV-145kV and is suitable for scenarios such as power plants, substations, railways, ports, etc. It is particularly suitable for space limited projects such as urban/mountainous substations, renovation of old stations, and rooftop/mobile substations.