GT solid insulation ring network cabinet

GT solid insulation ring network cabinet

GT-12 series solid insulated ring main unit is a fully insulated, fully sealed and maintenance-free solid insulated vacuum switchgear. All high-voltage live parts are casted with epoxy resin materials with excellent insulation performance, and the vacuum interrupter, main conductive circuit, insulation support, etc. are organically combined as a whole, and the functional units are connected through fully insulated solid busbars. Therefore, the entire switchgear is not affected by the external environment, which can ensure the reliability of equipment operation and the safety of operators.

The bad network cabinet has the characteristics of simple structure, flexible operation, reliable interlocking, and convenient installation. It is suitable for 50Hz, 12kV power systems, and is widely used in industrial and civil cable ring networks and distribution network terminal projects. It is especially suitable for power distribution in urban residential areas, small substations, opening and closing stations, cable branch boxes, box-type substations, industrial and mining enterprises, shopping malls, airports, subways, wind power generation, hospitals, stadiums, railways, tunnels, etc. use.

Because the product has the advantages of full insulation, full sealing, and full shielding, it is especially suitable for use in areas with harsh environments such as high altitude, high temperature, humid heat, severe cold, and severe pollution.

According to the switch type, it is divided into load switch with grounding assembly (referred to as C module), load switch without grounding assembly (abbreviated as CB module), circuit breaker with grounding assembly (abbreviated as V module), and circuit breaker without grounding assembly (referred to as VB module), circuit breaker tie switch (referred to as VZ module), load switch + fuse combination electrical switch assembly (referred to as F module), and  isolating switch assembly (referred to as G module).

Normal use condition

◊Ambient temperature: -45℃～+45℃

◊ Humidity: Maximum average relative humidity, daily average <95%, monthly average over 90%

◊Altitude: ≤4000 meters

◊Earthquake resistance: 8 degrees

◊Protection level: live body seal IP67, fuse barrel IP67, switch cabinet shell IP3X

Standards compliant

◊ Q/GDW 730-2012 "Technical Conditions for 12kV Solid Insulated Network Cabinets"

◊ GB 3804 3.6kV-40kV "AC High Voltage Load Switch"

◊ GB 4208 "Enclosure Protection Level IP Code"

◊ GB/T 15166.2 High Voltage AC Fuses Part 2: Current Limiting Fuses

◊ GB/T 11022 "Common Technical Conditions for High Voltage Switchgear and Control Equipment Standards"

◊ GB1984 "AC High Voltage Circuit Breaker"

◊ GB1958 "AC High Voltage Isolating Switch and Earthing Switch"

◊ GB 16926 High Voltage AC Load Switch-Fuse Combination Appliance

◊ GB/T7354 "Partial Discharge Measurement"

◊ GB3906 "3.6-40.5kV AC metal-enclosed switchgear and control equipment"

Features

1. Environmental protection

The materials used in the manufacture of the product are all non-toxic and harmless substances, and no toxic or harmful substances will be discharged during use. The materials can be recycled after the life cycle, which determines the environmental protection of the use.

Fully insulated, fully sealed, fully shielded epoxy resin switch body, fuse body (epoxy resin has excellent electrical properties, mechanical properties, and thermal characteristics, and has been used in electrical equipment for a long time, and has achieved good results.) Switch body, fuse body The simplified body is formed by epoxy resin APG process. The insulating body is a key part of the solid insulated switch, which is both an insulating part and a load-bearing part. It is required to meet the technical requirements of heat resistance, weather resistance, crack resistance, high mechanical strength and good insulation strength at the same time.

2. Wide range of application

The switch cylinder and the isolating switch operating mechanism box adopt a dynamic and static sealing structure to form a sealed cavity, which is filled with dry nitrogen at zero gauge pressure, does not use SF6 gas, and is completely isolated from the external environment to ensure that the switchgear can be used in all working conditions.

3. Convenient installation and transportation

Single cabinet structure, unified design of the whole series of products, providing various cabinet types required by users, and the shape and geometry are exactly the same. The universal insulated bus bar and cable plugs produced by professional cable accessories manufacturers are adopted. The switchgear can be combined on site and expanded at will, avoiding the inconvenience of transportation and installation caused by multiple combinations. Combined cabinets are also available upon request.

4. Maintenance-free

Except for the operating mechanism, the high-voltage switchgear of the solid-insulated indoor AC high-voltage vacuum switchgear is in a fully sealed state, which can avoid cleaning and maintenance and reduce the cost of operation and maintenance.

5. Security

Since the touchable parts adopt shielding measures, the occurrence of personal electric shock accidents is completely eliminated, and the safe use is improved. Perfect interlocking system, the three-phase isolation fracture is clearly visible, avoiding the occurrence of misoperation accidents. The application of SF6 gas is completely canceled, and the explosion accident caused by the decrease of insulation performance and arc extinguishing ability of SF6 ring main unit due to insufficient gas pressure is avoided. Strengthen the isolation structure between phases to avoid expansion or explosion accidents caused by short circuits between phases or multiple circuits. The vacuum interrupter with explosion-proof performance is adopted, and the switch sleeve has further protection performance for the switch. The auxiliary grounding switch of the load switch-fuse combined electrical appliance adopts a vacuum switch tube to be sealed in the fuse body.

6. Ease of operation

There is only one operating handle for the disconnector grounding switch, so there is no need to identify and worry about mistakes. When the circuit breaker is running, the operating handle of the disconnector grounding switch cannot be operated. The operation procedure is clear at a glance, and anyone with a little knowledge of electrician can operate it without blackmail. Complex technical training. In this way, the operation becomes extremely simple, and no operation error occurs in the society.

Seven, intelligent

The switchgear has intelligent interfaces and sensor installation positions, and the intelligent equipment can meet the requirements of the smart grid.

8. Various operating mechanisms

The switch can be equipped with spring and permanent magnet operating mechanisms, which is convenient for users to choose.