XGN33

XGN35 Air Insulated Switchgear

The 35kV air insulated ring main unit is a core backbone equipment for domestic high-voltage distribution networks, widely applicable to urban high-voltage distribution network main lines, large industrial enterprises, new energy bases, and cross regional distribution network projects. It uses dry air as the insulation medium, integrates core technologies such as high-voltage insulation strengthening, intelligent operation and maintenance deepening, and global adaptation, and has full functions such as main line power supply, ring network interconnection, fault isolation, and new energy grid connection. The equipment combines high voltage performance, environmental characteristics, and convenient operation and maintenance, and is a benchmark equipment for the construction and upgrading of high voltage distribution networks in China. Its application scenarios cover multiple fields such as electricity, industry, and new energy.

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Features

1.Domestic global adaptation:

Accurately matching GB standards with mainstream parameters of domestic 35kV distribution networks, with excellent compatibility with existing distribution network equipment and scheduling systems, it can be connected to new projects and old distribution network upgrade projects without additional modifications, and has strong adaptability.

2.Intelligent operation and maintenance closed-loop:

Built in multi parameter online monitoring modules for insulation status, partial discharge, temperature and humidity, supporting fault warning, remote control, and operation and maintenance data visualization. It can seamlessly integrate with domestic distribution network automation platforms to achieve unmanned operation and maintenance.

3.High voltage energy-saving optimization:

adopting low loss core components and optimized circuit design, the no-load loss is reduced by 15% compared to similar equipment, while reducing the loss in the voltage reduction process, helping the distribution network save energy and reduce consumption, in line with the “dual carbon” goal.

4.Modular expansion is convenient:

adopting standardized module design, supporting free combination of load switches, circuit breakers, metering units and other components, and can be flexibly expanded and upgraded according to project needs to adapt to the increasing demand of distribution network loads in different stages.

Execution standards: GB/T 3906-2020, IEC 62271-201; Rated current: 2500A-4000A; Short circuit breaking current: 31.5kA-40kA; Protection level: IP4X (outdoor type IP55); Installation methods: indoor floor standing, outdoor prefabricated, underground distribution room embedded; Optional configurations: Partial discharge monitoring module, intelligent metering terminal, electric energy storage operating mechanism.

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    Specification

    No. Name Unit Value
    1 Rated Voltage kV 35
    2 Rated Frequency Hz 50
    3 Rated Current of Main Busbar / Maximum Rated Current of Fuse A 630, 125
    4 Rated Short-time Withstand Current of Main Circuit & Grounding Circuit kA/S 20, 3
    5 Rated Peak Withstand Current of Main Circuit & Grounding Circuit kA 50
    6 Rated Short-circuit Making Current of Main Circuit & Grounding Circuit kA 50
    7 Full Capacity Opening Times of Load Switch times 100
    8 Fuse Breaking Current kA 31.5
    9 Rated Closed-loop Breaking Current A 630
    10 Rated Transfer Current A 1600
    11 Mechanical Life times 2000
    12 1min Power Frequency Withstand Voltage (Peak) – Phase-to-Phase & Phase-to-Earth / Isolation Break kV 70/80
    13 Lightning Impulse Withstand Voltage (Peak) – Phase-to-Phase & Phase-to-Earth / Isolation Break kV 185/215
    14 1min Power Frequency Withstand Voltage of Secondary Circuit kV 2
    15 Protection Class IP3X

    FAQs

    What issues should be noted when using a 35kV air insulated ring main unit in conjunction with an oil immersed transformer?

    It is necessary to match the voltage and current parameters of both to ensure compatibility of insulation strength, while reserving sufficient safety distance. The built-in overcurrent protection module of the equipment can be linked with the transformer protection system to avoid fault propagation.

    Can equipment replace traditional SF6 ring main unit in the upgrade of old distribution network?

    It can be directly replaced, and the installation size and interface can be customized and adapted, without the need to reconstruct the layout of the distribution room. At the same time, it saves the cost of SF6 gas recovery and treatment, simplifies operation and maintenance, and meets the environmental protection upgrade needs of the distribution network.

    Related Applications

    Urban high-voltage distribution network backbone: As the core equipment of the 35kV distribution network backbone in domestic cities, it can achieve multi loop ring network interconnection and segmented control. It is installed in urban underground distribution rooms and roadside distribution rooms, with intelligent operation and maintenance functions in conjunction with the municipal distribution network automation system, to quickly isolate faulty sections, restore power supply to non faulty areas, ensure continuous electricity supply for residents’ lives, commercial offices, and public facilities, and assist in the digital upgrading of urban distribution networks.

    Large data centers: The high-voltage power supply system of ultra large data centers needs to balance stability and energy efficiency. The 35kV ring main unit can be used as the core distribution equipment on the high-voltage side of the data center to achieve high-voltage power supply access and load distribution. The low loss design reduces power consumption, and the multi parameter monitoring function provides real-time feedback on the distribution status, quickly handles line faults, avoids data loss due to power outages, and ensures 24-hour uninterrupted operation of the data center.

    Coal deep processing park: Coal deep processing parks (such as coal to olefin and coal to oil parks) have high loads and high requirements for power supply reliability. The 35kV ring main unit can achieve segmented control and load transfer of the park’s high-voltage distribution network. The modular expansion design adapts to the park’s capacity expansion needs, and is linked with the park’s production scheduling system to adjust the power supply mode according to changes in production load. At the same time, there is no SF6 gas hazard, which meets the park’s safety and environmental protection requirements.

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