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12KV 250A Medium Voltage Inflatable Cabinet Electrical Switchgear

12KV 250A Medium Voltage Inflatable Cabinet Electrical Switchgear

In the past few years, as society and the economy have continued to evolve, the engineering construction industry has become more complex due to advancements in technology. There is a growing preference for switch equipment that is compact, requires minimal maintenance, and is smart. Both local and international switch manufacturers are actively working on 12KV 250A Medium Voltage Inflatable Cabinet Electrical Switchgear(C-GIS), or gas-insulated switchgear. This technology involves enclosing high-voltage components like busbars, circuit breakers, isolating switches, and power cables within a shell with reduced gas pressure.

Model:12KV 1250A inflatable cabinet

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Product Description

12KV 250A Medium Voltage Inflatable Cabinet Electrical Switchgear Product Features

1. Because of the use of sulfur hexafluoride gas with insulation performance as an insulation and arc extinguishing medium, the volume of the switchgear can be significantly minimized, making it more small and achieving miniaturization.

2. The conductive part of the high integrity and safety and security primary circuit is secured in SF6 gas, and the high-voltage online conductor is confined, which is not affected by exterior ecological problems, making certain lasting secure procedure of the tools and high reliability.

3. And there is no risk of electrical shock or fire.

4. Independent modular design, the air box is constructed from high-precision aluminum plate and can be taken apart. The isolation switch adopts a three-position straight transmission. To minimize the control relay and circuit turmoil, an additional control component with virtually 100 points of PLC is made to accomplish grounding, seclusion button, and all-electric remote procedures. The system button has a modular style. The opening and closing factors are gotten in touch with plum bloom calls, Removing the opportunity of non-operation of the original rotating seclusion switch and grounding switch, changing the trouble of unsteady and excessive get in touch with resistance of the original rotating isolation switch, and mounting securing and voltage equalization covers on the outside of each get in touch with to resolve the partial discharge trouble in the production of button breakpoints.

5. The application and arrangement of gas-insulated switchgear are convenient. As an independent unit, it can meet the needs of different major electrical wiring with mix. Supplying to the website in the form of devices can reduce the on-site installment period and enhance 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

12KV 250A Medium Voltage Inflatable Cabinet Electrical Switchgear Basic Scheme

Operation Condition

Technical Parameter

Grounding and Separation

The 12KV 1250A  Medium Voltage Inflatable Cabinet Electrical Switchgear C-GIS is available in various current ratings, including 630A, 1250A, 1600A, 2000A, 2500A, 3150A, and more. The cabinet's size can be tailored to suit individual requirements. The exterior is crafted from aluminum zinc-coated plates, while the gas box is made from high-quality 304 stainless steel plates, ensuring durability and reliability. The units are designed to be modular, allowing for easy expansion and combination as needed.

The cabinet is divided into several sections, including a secondary control room, busbar room, circuit breaker room, circuit breaker operating mechanism room, and cable room. The cable connection height is a generous 700mm, facilitating maintenance and installation tasks.

The cabinet features a comprehensive grounding protection system, ensuring the safety of operators and equipment. The switchgear is composed of isolated functional compartments, such as switch rooms, busbar rooms, cable rooms, and secondary circuit channels, each separated by a grounding metal partition. This design provides independence and additional safety measures for each compartment.

Secondary control room

The upper cabinets have a secondary control room that can be used to install various components such as wiring terminals, small busbar terminals, comprehensive protection devices, and other control and operation devices. This allows for remote control, telemetry, remote signaling, and local monitoring of the system. The left and right side panels have circular holes for connecting small busbars, making it easy to connect the cabinet.

Busbar Compartment

The busbar room is located inside the upper air box alongside the isolation mechanism. Once the cabinet is positioned on the ground support, the left and right circuit cabinets and busbars are securely linked by merging the cabinets.

Switch Room

The switch room is located at the center of the cabinet, which features a plate-type gas-insulated switch cabinet design consisting of two upper and lower chambers. In the upper chamber, there is a three-position isolation switch, while the lower chamber houses a vacuum circuit breaker. The arrangement of the busbar, isolation switch, and circuit breaker follows an "up, middle, and down" configuration. While the single chamber design is straightforward to produce and economical, the components in this setup can easily impact each other, resulting in lower reliability. On the other hand, the multi-chamber structure allows for easy component replacement, prevents interference between multiple parts, and enhances safety. However, the multi-chamber configuration is intricate, challenging to manufacture, and comes at a higher cost.

Institutional Room

The spring mechanism is positioned on one level, while the isolation and circuit breaker mechanisms are separated individually. It is combined with the insulation rod of the vacuum arc extinguishing chamber on both ends, streamlining the transfer process. The mechanism's performance aligns better with the circuit breaker's operation, resulting in lower power usage and enhanced mechanical reliability and flexibility.

Cable Room

The under-cabinet space houses the cable room, which boasts a dedicated pressure relief system. The cable connections to the ground measure up to 700mm in height. The cable room features grounding interlocks, allowing for the installation of two cables and lightning arresters per circuit. Additionally, the incoming and outgoing cables, as well as lightning arresters, are securely fastened using a convenient internal cone insertion method.

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