12kV Dry Air Insulated Ring Main Unit
The GPR1.1 series dry air insulated ring main unit switchgear (hereinafter referred to as GPR1.1 ring main unit) is a new generation of small, intelligent, and environmentally friendly ring main unit switchgear with international level, developed according to the needs of the construction and renovation of the distribution network in the new era. Its technology draws on the technical advantages of SF6 fully insulated ring main unit at home and abroad. Through electromagnetic field simulation analysis, dry air is used as the insulation medium, combined with vacuum arc extinguishing technology, completely replacing SF6 gas and retaining the technical advantages of SF6 fully insulated ring main unit. Realizing zero emissions of SF6 is a new generation of green and environmentally friendly products.
GPR1.1 ring main unit is suitable for three-phase AC 50/60Hz power systems with a voltage range of 3.6~12kV. It is used for receiving and distributing electrical energy and is widely used in oil-free, safe and reliable small distribution stations, switch stations, urban residential areas, airports, power plants, power grids, petrochemicals, metallurgy, railways, tunnels, and high-rise buildings. It is particularly suitable for industrial and mining enterprises, mountainous areas, plateaus, etc Various places with harsh environmental conditions such as coastal areas and polluted environments.
Altitude: Less than 3000m;
Ambient temperature: Maximum +40℃, Minimum -25℃; the daily average temperature does not exceed+35℃;
Relative humidity: The average daily relative humidity does not exceed 95%, and the average monthly relative humidity does not exceed 90%;
Earthquake intensity: Not exceeding 8 degree;
Use in environments that can withstand dust, moisture, and short-term immersion in water.
Note: When the actual use environment conditions are inconsistent with the above conditions, please consult with our company.
IEC 60694:2002 Common Technical Requirements for High Voltage Switchgear and Controlgear Standards
IEC 60298: 1990 AC Metal Enclosed Switchgear and Controlgear above 1kV and below 52kV
IEC 60265-1:1998 High Voltage Load Switches Part 1: Load Switches with Rated Voltage above 1kV and below 52kV
IEC 62271-100:2012 High Voltage AC Circuit Breakers
IEC 62271-102:2012 High Voltage AC Isolating and Earthing Switches
GB/T 3906-2006 3.6kV~40.5kV AC Metal Enclosed Switchgear and Controlgear
GB/T 11022-2011 Common Technical Requirements for High Voltage Switchgear and Controlgear Standards
GB/T 1984-2014 High Voltage AC Circuit Breakers
GB/T 3804-2017 3.6kV~40.5kV High Voltage AC Load Switch
GB/T 1985-2014 High Voltage AC Isolation and Earthing Switches
Non polluting: Using specially treated dry air as insulation medium, green and environmentally friendly.
Miniaturization: Compact and compact, occupying less than a quarter of the traditional product area, saving land.
Visualization: There is a visual window corresponding to the three-station isolation and earthing switch, which can visually observe the isolation break and earthing status, improving the safety of use.
Zero gauge pressure: The internal dry air pressure is consistent with atmospheric pressure, and there is no gas pressure on the gas tank, greatly reducing the risk of air leakage.
High performance: The internal electromagnetic field balancing technology is used to evenly distribute the electric field inside the gas tank, achieving stable operation and ensuring electrical performance in dry air.
Safety: Adopting mechanical interlocking device with "five prevention" locking function; Install a pressure relief device at the bottom of the gas tank to protect the safety of operators in front of the cabinet.
Maintenance-free: The interior of the switchgear is filled with dry air, and the gas pressure is at atmospheric pressure. The components inside the gas tank are maintenance free for 30 years, greatly reducing the cost of comprehensive investment and having significant economic benefits.
GPR1.1 ring main unit mainly consists of two parts: the cabinet and the sealed stainless steel gas tank. The cabinet is divided into several parts such as the operating mechanism box, cable box, and secondary instrument box. Each functional unit and the cable box are separated into independent compartments by metal plates without interfering with each other. It can effectively prevent a fault in a single compartment from affecting other compartments and control the fault scope to the maximum extent. The busbar, load switch, circuit breaker, connecting conductor, etc. are all installed in a sealed stainless steel gas tank, using dry air as the insulating medium, with small size and simple structure.
The protection level of the GPR1.1 RMU enclosed is IP3X (IP4X is optional), and the protection level of the stainless steel gas tank is IP67.
The GPR1.1 ring main unit enclosed and the partitions of each functional unit compartment are made of high-quality cold-rolled steel plates that are bent and formed by CNC machine tools and other equipment, and are assembled with high-strength rivets, nuts and bolts, and have high mechanical strength. and excellent corrosion resistance. Compared with similar equipment, it has the advantages of high precision, light weight, high mechanical strength, and beautiful appearance. At the same time, due to the modular design, the versatility and interchangeability of parts are improved, which can effectively shorten the processing cycle and reduce Production area. The cabinet surface spraying process adopts the world's most advanced electrostatic powder automatic spraying production technology, which has the advantages of beautiful topcoat, strong adhesion, corrosion resistance, high hardness, anti-aging, and good gloss and color retention.
