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12KV 1600A Medium Voltage Gas Insulated Electrical Switchgear

12KV 1600A Medium Voltage Gas Insulated Electrical Switchgear

The advancement of society, economy, and technology has led to increased complexity in engineering construction. There is a growing demand for compact, low-maintenance, and intelligent switch products. Both domestic and foreign switch manufacturers are actively developing 12KV 1600A Medium Voltage Gas Insulated Electrical Switchgear (C-GIS), also known as gas-insulated switchgear. Gas-insulated switchgear refers to the encapsulation of high-voltage components, such as busbars, circuit breakers, isolating switches, and power cables, within a shell that maintains a lower gas pressure.

Model:12KV 3150A medium voltage switchgear

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Product Description

Product Features

1. As a result of using sulfur hexafluoride gas with insulation performance as an insulation and arc extinguishing tool, the volume of the switchgear can be substantially reduced, making it a lot more small and accomplishing miniaturization.

2. The conductive part of the high dependability and security main circuit is sealed in SF6 gas, and the high-voltage real-time conductor is confined, which is not impacted by exterior environmental conditions, ensuring long-term risk-free procedure of the equipment and high integrity.

3. And there is no danger of electric shock or fire.

4. 12KV 1600A Medium Voltage Gas Insulated Electrical Switchgear Independent modular style, the air box is made of high-precision light weight aluminum plate and can be disassembled. The seclusion button embraces a three-position straight transmission. To reduce the control relay and circuit disorder, an additional control module with nearly 100 points of PLC is developed to accomplish grounding, isolation switch, and all-electric remote procedures. The device switch has a modular style. The opening and closing factors are gotten in touch with plum bloom contacts, Eliminating the opportunity of non-operation of the original rotating isolation button and grounding switch, transforming the trouble of unstable and excessive get in touch with resistance of the initial rotary isolation button, and installing protecting and voltage equalization covers outside of each get in touch with to resolve the partial discharge problem in the manufacturing of switch breakpoints.

5. The application and setup of gas-insulated switchgear are convenient. As an independent device, it can meet the needs of numerous main wiring through mix. Providing to the site in the form of devices can reduce the on-site setup duration 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 1600A Medium Voltage Gas Insulated Electrical Switchgear C-GIS is available in various current levels ranging630A to 3150A. The size of the cabinet can be tailored to specific requirements. The outer casing is manufactured from an aluminum zinc-coated plate and the gas box is constructed from 304 stainless steel plates. Each unit is expandable and can be combined as per the design plan. The cabinet is compartmentalized into sections including a secondary control room, busbar room, circuit breaker room, circuit breaker operating mechanism room, and cable room. The cable connection height can reach 700mm, facilitating maintenance and installation. Additionally, the cabinet is equipped with a comprehensive grounding protection system. It features distinct functional compartments separated by grounding metal partitions for increased safety and independence.

Secondary control room

The upper cabinet contains a secondary control room equipped with various components, including installation boards and fixing brackets for terminal blocks. This space allows for the installation of wiring terminals, small busbar terminals, comprehensive protection devices, and other control and operation devices. These devices enable remote control, telemetry, remote signaling, and local monitoring functions. Additionally, there are circular holes at the corresponding positions on the left and right side panels and terminals, allowing for easy connection to the cabinet.

Busbar Compartment

The busbar room is situated within the upper air box, which also houses the isolation mechanism. Once the cabinet is positioned on the ground support, the left and right circuit cabinets and busbars are securely linked through a process called cabinet merging.

Switch Room

The switch room is located centrally within the cabinet, which is designed as a plate-type gas-insulated switch cabinet with two separate chambers positioned above and below. The upper chamber houses a three-position isolation switch, while the lower chamber contains a vacuum circuit breaker. The busbar, isolation switch, and circuit breaker are positioned in an "up, middle, and down" configuration. A single-chamber structure is uncomplicated, cost-effective, and easy to produce but may experience reduced reliability due to component interactions. Conversely, a multi-chamber structure allows for easier component replacement, minimizes mutual influence among parts, and enhances safety. However, this design is more intricate to manufacture and comes at a higher cost.

Institutional Room

The spring-operated system is positioned on a single plane, with the isolation and circuit breaker mechanisms distinct from each other. It is incorporated with the insulation rod of the vacuum arc extinguishing chamber, streamlining the transfer process. The operational features of the system align better with the circuit breaker's opening and closing behaviors, leading to lower power usage and enhanced mechanical dependability and adaptability.

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.

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