12KV 3150A Medium Voltage Electrical Switchgear Gas Insulation Switchgear

Product Features

1. By utilizing sulfur hexafluoride gas as a shielding and arc extinguishing medium, the size of the switchgear can be greatly reduced, resulting in an extra compact and smaller sized layout.

2. The conductive part of the main circuit, which is very trusted and risk-free, is sealed in SF6 gas, keeping the high-voltage real-time conductor enclosed and unaffected by outside variables. This ensures long-term secure procedure and high integrity of the equipment. 3. There is no danger of electric shock or fire.

4. The 12KV 3150A Medium Voltage Electrical Switchgear Gas Insulation Switchgear is made with an independent modular framework, with the air box constructed from high-precision light weight aluminum plate and can be disassembled. The isolation switch takes on a direct transmission with 3 settings. To lessen control relay and circuit complication, an added control component with virtually 100 PLC points is included for grounding, seclusion switch, and remote operations. The system button is modular, connecting opening and closing points with plum blossom calls. This eliminates the opportunity of non-operation in the initial rotary isolation switch and basing button, fixes the problem of unsteady and too much contact resistance in the original rotary isolation switch, and includes securing and voltage equalization covers on each get in touch with's exterior to address partial discharge problems throughout button breakpoints manufacturing.

5. The gas-insulated switchgear is convenient to use and set up. It can be utilized as an independent system and meet different main circuitry requirements with combination. Supplying it to the website as devices can shorten on-site installation and improve 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 12KV 3150A Medium Voltage Electrical Switchgear Gas Insulation Switchgear is available in a range of current capacities, 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 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 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 cabinet's cable connection height reaches 700mm, facilitating maintenance and installation. A comprehensive grounding protection system is also included. The switchgear features isolated functional compartments, such as switch rooms, busbar rooms, cable rooms, and secondary circuit channels. Each compartment operates independently, separated by a grounding metal partition.

Secondary control room

The cabinet is positioned beneath the secondary control room and features boards for component installation and brackets for securing terminal blocks. The secondary control room facilitates the installation of diverse devices, including wiring terminals, small busbar terminals, and comprehensive protection devices. These devices enable the system to perform various functions such as remote control, telemetry, remote signaling, and local monitoring. The cabinet's left and right side panels have circular holes and terminals, allowing for easy connection to small busbars.

Busbar Compartment

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

Switch Room

The 12KV 3150A Medium Voltage Electrical Switchgear Gas Insulation Switchgear features a plate-type design consisting of two chambers stacked on top of each other 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. A single-chamber configuration is straightforward, cost-effective, and simple to produce but may have lower reliability due to the components being closely positioned. In contrast, a multi-chamber layout offers enhanced safety by preventing mutual interference between components and facilitating easy replacement. However, this option is more intricate, challenging to manufacture, and comes at a higher cost.

Institutional Room

The spring-driven system is located on a level surface, with the isolation and circuit breaker components kept apart. It is connected to the insulation rod of the vacuum arc extinguishing chamber both before and after, streamlining the transfer process. The system's performance features are more closely matched with the circuit breaker's functions, leading to lower energy consumption and improved mechanical dependability and adaptability..

Cable Room

The cabinet is located above the cable room and features its own pressure relief pathway. The height between the ground and the cable connection terminals can reach up to 700mm. To meet safety standards, grounding interlocks are included in the cable room, enabling the setup of two cables and lightning arresters in every circuit. Additionally, the method of internal cone insertion links the incoming and outgoing cables along with the lightning arresters.