35KV 630A Medium Voltage Inflatable Cabinet Gas Insulated Switchgear

Product Features

1. By utilizing sulfur hexafluoride gas as an insulating and arc extinguishing medium, the dimension of the switchgear can be substantially minimized, leading to a more compact and smaller style.

2. The conductive part of the main circuit, which is very reputable and secure, is secured in SF6 gas, keeping the high-voltage online conductor enclosed and untouched by outside elements. This guarantees long-term secure operation and high reliability of the tools. 3. There is no threat of electrical shock or fire.

4. The 35KV 630A Medium Voltage Inflatable Cabinet Gas Insulated Switchgear is developed with an independent modular structure, with the air box made of high-precision aluminum plate and can be disassembled. The seclusion button adopts a straight transmission with 3 placements. To reduce control relay and circuit confusion, an additional control module with virtually 100 PLC points is included for grounding, isolation button, and remote operations. The system switch is modular, connecting opening and closing factors with plum bloom get in touches with. This removes the possibility of non-operation in the initial rotating seclusion switch and basing button, settles the concern of unstable and extreme call resistance in the initial rotary isolation button, and consists of protecting and voltage equalization covers on each call's outside to resolve partial discharge issues throughout switch breakpoints manufacturing.

5. The gas-insulated switchgear is convenient to use and organize. It can be utilized as an independent system and fulfill various primary electrical wiring requirements with combination. Providing it to the site as systems can reduce on-site setup and boost integrity.

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 35KV 630A Medium Voltage Inflatable Cabinet Gas Insulated Switchgear is available in a range of current capacities, including 630A, 1250A, 1600A, 2000A, 2500A, 3150A, and more. The cabinet's size can be tailored to meet specific requirements. The exterior is constructed from aluminum zinc-coated plates, 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 design specifications. The cabinet is compartmentalized 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 up to 700mm, facilitating maintenance and installation. 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 boards for inserting components and brackets for securing terminal blocks. In the secondary control room, various devices can be installed, including wiring terminals, small busbar terminals, and comprehensive protection devices. These devices facilitate functions like remote control, telemetry, remote signaling, and local monitoring. Circular openings on the side panels and terminals on the left and right sides simplify the connection of the cabinet with small busbars.

Busbar Compartment

The upper portion of the apparatus houses both the busbar chamber and the isolation system. The circuit cabinets and busbars situated on either side are connected via cabinet merging, which occurs once the cabinet is positioned on the ground support.

Switch Room

The 35KV 630A Medium Voltage Inflatable Cabinet Gas Insulated Switchgear features a plate-type design with two chambers stacked on top of each other at the cabinet's center. In the upper chamber, there is a three-position isolation switch, while the lower chamber houses a vacuum circuit breaker. The busbar, isolation switch, and circuit breaker are aligned vertically. The single-chamber configuration is straightforward, cost-effective, and easy to produce but has reduced reliability due to the components' close proximity. In contrast, the multi-chamber setup offers enhanced safety by preventing interference among components and facilitating simple component replacement. Nevertheless, it is a more intricate, costly, and challenging manufacturing choice.

Institutional Room

The spring-activated device is located on a level surface, with the isolation and circuit breaker components positioned separately. It is connected to the insulation rod of the vacuum arc extinguishing chamber both before and after, streamlining the transfer process. The performance of the device is designed to complement the opening and closing features of the circuit breaker, leading to decreased energy consumption and improved mechanical dependability and adaptability.

Cable Room

The cabinet is located above the cable room and includes a distinct pressure relief route. The height from the floor to the cable connection points can reach up to 700mm. To meet standards, grounding interlocks are included in the cable room, permitting the setup of two cables and lightning arresters in every circuit. Additionally, the internal cone insertion technique links the incoming and outgoing cables and lightning arresters.