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12KV 2500A Sf6 Sulfur Hexafluoride Infiilled Electrical Switchgear

12KV 2500A Sf6 Sulfur Hexafluoride Infiilled Electrical Switchgear

In recent years, the field of engineering construction has faced increasing complexity due to advancements in technology and the growth of society and the economy. There is a rising demand for compact switch equipment that is smart and requires minimal maintenance. Both local and global manufacturers of switches are currently focusing on the development of 12KV 2500A Sf6 Sulfur Hexafluoride Infiilled Electrical Switchgear, also referred to as gas-insulated switchgear (C-GIS). These C-GIS systems encase high-voltage components like busbars, circuit breakers, isolating switches, and power cables in a housing with reduced gas pressure.

Model:12KV 2500A medium voltage switchgear

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Product Description

Product Features

1. By utilizing sulfur hexafluoride gas as an insulating and arc extinguishing medium, the size of the switchgear can be considerably decreased, leading to a much more portable and smaller design.

2. The conductive part of the main circuit, which is highly dependable and safe, is secured in SF6 gas, maintaining the high-voltage live conductor enclosed and untouched by external factors. This ensures long-lasting secure procedure and high dependability of the equipment.

3. There is no risk of electric shock or fire.

4. The 12KV 2500A Sf6 Sulfur Hexafluoride Infiilled Electrical Switchgear is developed with an independent modular structure, with the air box made of high-precision light weight aluminum plate and can be dismantled. The isolation button adopts a straight transmission with 3 positions. To lessen control relay and circuit complication, an added control component with nearly 100 PLC points is included for grounding, isolation switch, and remote operations. The system button is modular, attaching opening and closing factors with plum blossom contacts. This removes the possibility of non-operation in the initial rotating isolation switch and grounding button, solves the problem of unpredictable and excessive get in touch with resistance in the original rotating isolation switch, and consists of shielding and voltage equalization covers on each get in touch with's outside to attend to partial discharge problems throughout button breakpoints production.

5. The gas-insulated switchgear is convenient to use and prepare. It can be utilized as an independent system and satisfy numerous main electrical wiring requirements through combination. Delivering it to the website as units can shorten on-site setup and improve dependability.

Execution standards

IEC 62271-200: 2011 High-voltage switchgear and controlgear - Part 200: AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV

IEC 62271-102:2013 6.2 High-voltage switchgear and controlgear - Part 102: Alternating current disconnectors and earthing switches

IEC 62271-100: 2017.6.2 High-voltage switchgear and controlgear - Part 100: Alternating-current circuit-breakers

GB/T11022-1999 Common technical requirements for high-voltage switchgear and control equipment standards

GB3906-2006 3.6kV~40.5kV AC Metal Enclosed Switchgear and Control Equipment

GB311.1-1997 Insulation Coordination of High Voltage Transmission and Transformation Equipment

GB/T16927.1-1997 High voltage testing technology Part: General test requirements

GB/T16927.2-1997 High voltage testing techniques Part 2: Measurement systems

GB/T7354-2003 Partial discharge measurement

GB1984-1989 AC High Voltage Circuit Breakers

GB3309-1989 Mechanical tests of high-voltage switchgear at room temperature

GB4208-2008 Code for Degree of Protection Provided by Enclosures (IP)

GB12022-2006 Industrial sulfur hexafluoride

GB8905-1988 Guidelines for gas management and inspection in sulfur hexafluoride electrical equipment

GB11023-1989 Test method for sulfur hexafluoride gas sealing of high-voltage switchgear

GB/T13384-1992 General technical requirements for packaging of electromechanical products

GB4207-2003 Solid insulation materials - Determination of relative and resistance to electrical trace index under humid conditions

GB/T14598.3-2006 Electrical relays - Part 5: Insulation of electrical relays

GB/T17626.2-1998 Electromagnetic Compatibility Testing and Measurement Techniques - Electrostatic Discharge Reactance Interference Test

GB/T17626.4-2008 Electromagnetic Compatibility Testing and Measurement Techniques - Electrical Fast Transient Pulse Group Immunity Test

GB/T17626.5-2008 Electromagnetic Compatibility Testing and Measurement Techniques - Surge (Impulse) Immunity Test

GB/T17626.12-1998 Electromagnetic Compatibility Testing and Measurement Techniques - Oscillating Wave Immunity Test

Test Type

◆ Insulation test

◆ Temperature rise test

◆ Loop resistance measurement

◆ Short-time withstand current and peak withstand current tests.

◆ Verification of making and breaking capabilities

◆ Mechanical operation and mechanical characteristic testing tests

◆ Protection level detection

◆ Additional tests on auxiliary and control circuits

◆ Pressure tolerance test for inflatable compartments

◆ Sealing test

◆ Internal arc test

◆ Electromagnetic compatibility test

Basic Scheme

Operation Condition

Technical Parameter

Grounding and Separation

The 12KV 2500A Sf6 Sulfur Hexafluoride Infiilled Electrical Switchgear C-GIS  is available in multiple current levels, including 630A, 1250A, 1600A, 2000A, 2500A, 3150A, and more. The cabinet size can be tailored to meet specific needs. Its outer casing is constructed from an aluminum zinc-coated plate, and the gas enclosure is assembled using 304 stainless steel plates of high quality. Each unit can be expanded and integrated separately according to the design layout. The cabinet is segmented into distinct sections: secondary control, busbar, circuit breaker, circuit breaker operating mechanism, and cable rooms. The cable connection height can extend up to 700mm, facilitating easy maintenance and installation. Additionally, the cabinet features a comprehensive grounding protection system. Functional compartments in the switchgear, such as switch, busbar, cable rooms, and secondary circuit channels, are isolated by grounding metal partitions, allowing them to operate autonomously.

Secondary control room

Underneath the secondary control room, you'll find a cabinet designed for housing various components. It features boards for installing parts and brackets for securing terminal blocks. The secondary control room offers ample space for installing an array of devices, including wiring terminals, small busbar terminals, and advanced protection devices. These devices enable the system to perform a range of functions, such as remote control, telemetry, remote signaling, and local monitoring. Plus, circular holes on the left and right side panels, accompanied by terminals, facilitate connection with small busbars..

Busbar Compartment

The upper air box houses the busbar room and isolation mechanism. Once the circuit cabinets are placed on the ground support, they are securely connected on both sides through cabinet merging with the busbars.

Switch Room

The 12KV 2500A Sf6 Sulfur Hexafluoride Infiilled Electrical Switchgear features a plate-type design consisting of two chambers arranged vertically within the center of the cabinet. In the upper chamber, there is a three-position isolation switch, while the lower chamber houses a vacuum circuit breaker. The layout of the busbar, isolation switch, and circuit breaker is in a vertical orientation. A single-chamber configuration is straightforward, cost-effective, and simple to produce, but it may have reduced reliability due to the components being in close proximity. In contrast, the multi-chamber setup offers enhanced safety by preventing interactions between components and facilitating easier replacement. However, this design is more intricate, difficult to manufacture, and comes at a higher cost.

Institutional Room

The spring-powered system is located on a level surface, with the isolation and circuit breaker components isolated from each other. It is connected to the insulation rod of the vacuum arc extinguishing chamber both before and after, simplifying the transmission process. The system's performance is optimized to match the circuit breaker's operation, leading to lower energy consumption and improved mechanical durability and versatility.

Cable Room

The cabinet is positioned higher than the cable room and features its own pressure relief route. The height from the floor to the cable connection points may reach up to 700mm. To adhere to standards, grounding interlocks are included in the cable room, enabling the setup of two cables and lightning arresters in every circuit. Moreover, the internal cone insertion technique links the incoming and outgoing cables along with the lightning arresters.

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