12KV 2500A Switchgear Outgoing Cabinet Medium Voltage High Current Switchgear

Revolutionize your power distribution network with Kexunan's 12KV 2500A Switchgear Outgoing Cabinet Medium Voltage High Current Switchgear. As a leading manufacturer with a cutting-edge factory, Kexunan is dedicated to delivering top-notch solutions for medium voltage applications. Our meticulously crafted switchgear, tailored for high current scenarios, exemplifies our commitment to excellence in manufacturing. Opt for Kexunan as your trusted manufacturer and leverage the capabilities of our advanced factory, ensuring the highest standards of durability and performance. Elevate your power infrastructure with Kexunan's reliable and efficient switchgear solutions, setting a new benchmark in medium voltage technology.

In recent years, with the advancement of technology, engineering construction has become increasingly intricate as society and the economy have advanced. There is an increasing need for smaller, low-maintenance and intelligent switch equipment. Switch manufacturers, both domestic and international, are actively working on developing medium voltage gas-filled cabinets, also referred to as gas-insulated switchgear (C-GIS). A gas-insulated switchgear encloses high-voltage components, such as busbars, circuit breakers, isolating switches, and power cables, within a shell with reduced gas pressure.

1. Using sulfur hexafluoride gas as a medium for insulation and arc extinguishing, the switchgear can be made much smaller, resulting in a more compact and reduced-size design.

2. The conductive part of the main circuit, which is essential for safe and reliable operation, is sealed within SF6 gas. This ensures that the high-voltage live conductor remains enclosed and unaffected by external factors, guaranteeing long-term safe operation and high equipment reliability.

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

4. The switchgear has an independent modular structure, with the air box made of high-precision aluminium plates that can be disassembled. The isolation switch uses a linear transmission with three positions. An additional control module, with nearly 100 PLC points, is included for grounding, isolation switch, and remote operations to minimize control relays and circuit confusion. The modular mechanism switch connects opening and closing points with plum blossom contacts. This eliminates the possibility of non-operation in the original rotary isolation switch and grounding switch, resolves the issue of unstable and excessive contact resistance in the original rotary isolation switch, and includes shielding and voltage equalization covers on each contact's exterior to address partial discharge problems during switch breakpoints production.

5. The gas-insulated switchgear is easy and flexible to apply and arrange. It can function as an independent unit and meet various main wiring requirements through combination. Delivering it to the site as units can shorten on-site installation and improve reliability.

12KV 2500A Switchgear Outgoing Cabinet Medium Voltage High Current Switchgear Execution standards

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

12KV 2500A Switchgear Outgoing Cabinet Medium Voltage High Current Switchgear 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 C-GIS gas-insulated high-voltage switchgear is offered in various current capacities such as 630A, 1250A, 1600A, 2000A, 2500A, 3150A, and more. The size of the cabinet can be tailored to specific needs. The outer casing is made of a plate coated with aluminium zinc, while the gas box is constructed using high-quality stainless steel plates (304 grade). Each unit can be expanded and combined independently based on the design. The cabinet is divided into separate rooms: a secondary control room, busbar room, circuit breaker room, circuit breaker operating mechanism room, and cable room. The cable connection height can reach up to 700mm, allowing easy maintenance and installation. The cabinet is also equipped with a comprehensive grounding protection system. The switchgear consists of isolated functional compartments, such as switch rooms, busbar rooms, cable rooms, and secondary circuit channels. A grounding metal partition separates each functional compartment, ensuring independent operation.

Secondary control room

Located directly beneath the secondary control room, you can find the cabinet. This cabinet has boards to add components and brackets for securely fastening terminal blocks. The secondary control room is designed to accommodate various devices, including wiring terminals, small busbar terminals, and comprehensive protection devices. These devices enable the system to perform remote control, telemetry, remote signalling, and local monitoring functions. Circular openings on the side panels and terminals make connecting the cabinet with small busbars easier.

Busbar Compartment

The upper air box contains both the busbar room and the isolation mechanism. When the cabinet is placed on the ground support, the circuit and busbars are connected by merging the cabinets.

Switch Room

The gas-insulated switch cabinet has a flat design with two chambers stacked on top of each other in the middle of the cabinet. The top chamber has a three-position isolation switch, while the bottom holds a vacuum circuit breaker. The busbar, isolation switch, and circuit breaker are arranged vertically. The single chamber design is straightforward, cost-efficient, and simple to make, but it is less reliable because the components are close together. On the other hand, the multi-chamber structure ensures increased safety by preventing interference between components and making replacement easier. However, it is a more complex, difficult to manufacture, and costly option.

Institutional Room

The spring-operated system is placed horizontally, separating the isolation and circuit breaker components. It is integrated with the insulating rod of the vacuum arc extinguishing chamber both before and after, simplifying the transmission process. The mechanism's performance characteristics closely align with the functions of opening and closing the circuit breaker, resulting in reduced energy usage and enhanced mechanical reliability and flexibility.

Cable Room

The cabinet is on top of the cable chamber and includes a route for releasing pressure. The distance from the floor to the cable connection terminals can reach 700mm. To comply with the rules, the cable chamber has grounding interlocks, allowing for the placement of two cables and lightning arresters in each circuit. Furthermore, the internal cone insertion method is used to connect the incoming and outgoing cables and the lightning arresters.