High Voltage 40.5KV Armored Movable AC Metal Enclosed Switchgear

Embark on a new era of high voltage power distribution with Kexunan's High Voltage 40.5KV Armored Movable AC Metal Enclosed Switchgear. As a renowned manufacturer with an advanced factory, Kexunan is at the forefront of delivering cutting-edge solutions for high voltage applications. Our meticulously crafted switchgear, designed for mobility and reliability, reflects our commitment to excellence in manufacturing. Choose Kexunan as your trusted manufacturer and benefit from the capabilities of our state-of-the-art factory, ensuring superior standards of durability and performance. Elevate your high voltage infrastructure with Kexunan's reliable and efficient switchgear solutions, setting a new standard in the field.

Over the past few years, as society and the economy have grown and technology has advanced, engineering construction has become more complex. There is a growing preference for smaller switch equipment that requires less maintenance and is intelligent. Both domestic and international switch manufacturing companies are actively developing medium voltage gas-filled cabinets, also known 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 lower gas pressure.

1. By using sulfur hexafluoride gas as an insulating and arc extinguishing medium, the size of the switchgear can be greatly reduced, resulting in a more compact and smaller design.

2. The conductive part of the main circuit, which is highly reliable and safe, is sealed in SF6 gas, keeping the high-voltage live conductor enclosed and unaffected by external factors. This ensures long-term safe operation and high reliability of the equipment.

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

4. The switchgear is designed with an independent modular structure, with the air box made of high-precision aluminum plate and can be disassembled. The isolation switch adopts a linear transmission with three positions. To minimize control relay and circuit confusion, an additional control module with nearly 100 PLC points is included for grounding, isolation switch, and remote operations. The mechanism switch is modular, connecting 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 convenient to apply and arrange. It can be used 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.

High Voltage 40.5KV Armored Movable AC Metal Enclosed 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

High Voltage 40.5KV Armored Movable AC Metal Enclosed 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 comes in various current levels, such as 630A, 1250A, 1600A, 2000A, 2500A, 3150A, etc. The size of the cabinet can be customized to suit specific requirements. The outer shell is made from an aluminum zinc-coated plate, while the gas box is welded using 304 high-quality stainless steel plates. Each unit can be expanded and combined independently based on the design plan. The cabinet is divided into different rooms: a secondary control room, busbar room, circuit breaker room, circuit breaker operating mechanism room, and cable room. The cable connection height can reach 700mm, making maintenance and installation convenient. The cabinet is also equipped with a comprehensive grounding protection system. The switchgear comprises isolated functional compartments, such as switch rooms, busbar rooms, cable rooms, and secondary circuit channels. A grounding metal partition separates each functional compartment and operates independently.

Secondary control room

The cabinet is located directly below the secondary control room and has boards for installing components and brackets for fixing terminal blocks. The secondary control room allows for the installation of various devices, such as wiring terminals, small busbar terminals, and comprehensive protection devices. These devices enable the system to perform functions such as remote control, telemetry, remote signaling, and local monitoring. Circular holes on the left and right side panels and terminals make it easy to connect the cabinet with small busbars.

Busbar Compartment

The upper air box contains both the busbar room and the isolation mechanism. The circuit cabinets and busbars on the left and right sides are securely linked together through cabinet merging once the cabinet is placed on the ground support.

Switch Room

The gas-insulated switch cabinet has a plate-type structure with two chambers, one above the other, located in the center of the cabinet. The upper chamber contains a three-position isolation switch, while the lower chamber is equipped with a vacuum circuit breaker. The busbar, isolation switch, and circuit breaker are arranged in a vertical manner. The single chamber structure is simple, inexpensive, and easy to manufacture but has lower reliability due to the components' close proximity. On the other hand, the multi-chamber structure ensures high safety by avoiding mutual interference between components and allowing for easy replacement. However, it is a more complex, challenging to manufacture, and expensive option.

Institutional Room

The spring-operated mechanism is situated in a flat plane, with the isolation and circuit breaker mechanisms separated independently. It is integrated with the insulation rod of the vacuum arc extinguishing chamber before and after, making the transmission process simpler. The mechanism's output characteristics better align with the circuit breaker's opening and closing attributes, resulting in reduced power usage and enhanced mechanical reliability and flexibility.

Cable Room

The cabinet sits above the cable room and has a separate pressure relief pathway. The distance from the ground to the cable connection terminals can be as high as 700mm. In compliance with regulations, grounding interlocks are present in the cable room, allowing for the installation of two cables and lightning arresters in each circuit. Furthermore, the internal cone insertion method connects the incoming and outgoing cables and lightning arresters.