35KV 3150A Medium Voltage Gas Insulated Electrical Switchgear

Product Features

1. By utilizing sulfur hexafluoride gas as an insulating and arc extinguishing tool, the dimension of the switchgear can be greatly reduced, causing an extra compact and smaller sized layout.

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

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

4. The 35KV 3150A Medium Voltage Gas Insulated Electrical Switchgear is designed with an independent modular framework, with the air box made from high-precision light weight aluminum plate and can be dismantled. The isolation button takes on a straight transmission with 3 settings. To decrease control relay and circuit confusion, an extra control module with nearly 100 PLC factors is consisted of for grounding, isolation switch, and remote operations. The mechanism button is modular, attaching opening and closing factors with plum blossom calls. This eliminates the opportunity of non-operation in the original rotating isolation button and grounding button, fixes the problem of unpredictable and extreme contact resistance in the initial rotating isolation button, and includes securing and voltage equalization covers on each get in touch with's exterior to resolve partial discharge issues during switch breakpoints production.

5. The gas-insulated switchgear is convenient to apply and prepare. It can be made use of as an independent device and satisfy different primary circuitry requirements with mix. Delivering it to the website as devices can shorten on-site setup and boost reliability.

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 C-GIS 35KV 3150A Medium Voltage Gas Insulated Electrical Switchgear is available in a range of current levels, including 630A, 1250A, 1600A, 2000A, 2500A, 3150A, and others. The cabinet's size can be tailored to meet specific requirements. The exterior is constructed from an aluminum zinc-coated plate, while the gas box is made from high-quality 304 stainless steel plates, welded for durability. The units can be expanded and combined independently, according to the design plan. The cabinet is divided into several rooms, including a secondary control room, busbar room, circuit breaker room, circuit breaker operating mechanism room, and cable room. The cable connection height is 700mm, making maintenance and installation easy. The cabinet also features a comprehensive grounding protection system. The switchgear consists of isolated functional compartments, such as switch rooms, busbar rooms, cable rooms, and secondary circuit channels. Each functional compartment is separated by a grounding metal partition and operates independently.

Secondary control room

The cabinet is positioned beneath the secondary control room and features panels for mounting parts and supports for securing terminal blocks. In the secondary control room, different equipment can be set up including wiring terminals, compact busbar terminals, and advanced protection devices. These equipment facilitate various system functions like remote control, telemetry, remote signaling, and local monitoring. Circular openings on the side panels and terminals on both sides simplify connecting the cabinet to the compact busbars.

Busbar Compartment

The upper compartment houses both the busbar chamber and the isolation system. The connection between the circuit cabinets and busbars on either side is stabilized through the process of cabinet merging, once the cabinet is positioned on the ground support.

Switch Room

The 35KV 3150A Medium Voltage Gas Insulated Electrical Switchgear features a plate-type design consisting of two chambers stacked on top of each other, positioned at the center of the cabinet. 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 arranged vertically. The single-chamber configuration is straightforward, cost-effective, and simple to produce but has reduced reliability due to the components being closely located. Conversely, the multi-chamber layout ensures enhanced safety by preventing component interference and facilitating easy replacement. Nonetheless, it is a more intricate, costly, and challenging-to-manufacture alternative.

Institutional Room

The spring-based mechanism is positioned in a horizontal plane, with the isolation and circuit breaker mechanisms functioning independently of each other. The mechanism is connected to the vacuum arc extinguishing chamber's insulation rod, streamlining the transmission process. The mechanism's performance is optimized to correspond with the circuit breaker's opening and closing capabilities, leading to reduced power consumption, improved mechanical reliability, and increased flexibility.

Cable Room

The cabinet is positioned above the cable room and includes a distinct pressure relief route. The height between the ground and the cable connection terminals can reach up to 700mm. To meet regulatory requirements, there are grounding interlocks in the cable room, enabling the setup of two cables and lightning arresters in every circuit. Additionally, the internal cone insertion technique links the incoming and outgoing cables as well as the lightning arresters.