35KV 2500A Medium Voltage High Current Electrical Switchgear Gis

Product Features

1. By using sulfur hexafluoride gas as a shielding and arc extinguishing tool, the dimension of the switchgear can be significantly minimized, leading to a more portable and smaller sized style.

2. The conductive part of the primary circuit, which is highly trustworthy and secure, is secured in SF6 gas, keeping the high-voltage live conductor enclosed and untouched by exterior aspects. This makes sure lasting secure operation and high reliability of the devices.

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

4. The 35KV 2500A Medium Voltage High Current Electrical Switchgear Gis is developed with an independent modular structure, with the air box made from high-precision aluminum plate and can be dismantled. The isolation switch takes on a direct transmission with three placements. To decrease control relay and circuit complication, an added control module with virtually 100 PLC factors is included for grounding, isolation button, and remote procedures. The device button is modular, attaching opening and closing factors with plum blossom contacts. This gets rid of the possibility of non-operation in the initial rotating isolation button and basing button, settles the problem of unstable and extreme get in touch with resistance in the initial rotary seclusion button, and consists of protecting and voltage equalization covers on each contact's outside to deal with partial discharge issues during switch breakpoints manufacturing.

5. The gas-insulated switchgear is convenient to apply and prepare. It can be utilized as an independent device and meet various primary wiring demands via mix. Providing it to the website as units can reduce on-site installment and enhance 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 35KV 2500A Medium Voltage High Current Electrical Switchgear Gis 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 made from aluminum zinc-coated plates, while the gas box is constructed using high-quality 304 stainless steel plates. Each unit 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 can reach 700mm, making maintenance and installation easier. 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. A grounding metal partition separates each functional compartment and operates independently.

Secondary control room

The cabinet is situated beneath the secondary control room, which offers ample space for the installation of various components, including wiring terminals, small busbar terminals, and comprehensive protection devices. The secondary control room is designed to accommodate the integration of diverse devices that enable the system to perform a range of functions, such as remote control, telemetry, remote signaling, and local monitoring. The cabinet features circular holes on its left and right side panels, as well as terminals, facilitating easy connection to small busbars.

Busbar Compartment

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

Switch Room

The 35KV 2500A Medium Voltage High Current Electrical Switchgear Gis boasts a plate-type structure, comprising two vertically stacked chambers, situated in the central portion of the cabinet. The upper chamber houses a three-position isolation switch, while the lower chamber is outfitted with a vacuum circuit breaker. The busbar, isolation switch, and circuit breaker are arranged in a vertical configuration. The single-chamber design offers simplicity, cost-effectiveness, and ease of manufacturing, but its reliability is compromised due to the proximity of components. Conversely, the multi-chamber design guarantees high safety by minimizing interference between components and enabling effortless replacement. However, it is a more intricate, challenging to manufacture, and expensive option.

Institutional Room

The spring-powered system is positioned in a horizontally-aligned plane, featuring distinct separation between the isolation and circuit breaker mechanisms. This arrangement allows for streamlined integration with the vacuum arc extinguishing chamber's insulation rod, facilitating a more straightforward transmission process. The mechanism's output features are better suited to the circuit breaker's opening and closing properties, leading to decreased energy consumption, improved mechanical reliability, and increased versatility.

Cable Room

The cabinet is positioned above the cable room, featuring a distinct pressure relief pathway. The height from the ground to the cable connection terminals can reach up to 700mm. In accordance with regulations, grounding interlocks are integrated into the cable room, enabling the installation of two cables and lightning arresters in each circuit. Additionally, the internal cone insertion method secures the connection between the incoming and outgoing cables and lightning arresters.