NSGTG-35

NSGTG-35 Solid Insulated Switchgear

The 35kV solid insulated ring main unit is the main core equipment of the domestic ultra-high voltage distribution network backbone network. It adopts the ultra-high voltage special modified epoxy resin integrated casting process, fully sealed and packaged high voltage conductors, vacuum circuit breakers, intelligent monitoring units and other core components. It strictly follows high standards at home and abroad such as GB/T 11022 and IEC 62271, and is suitable for the strict requirements of ultra-high voltage distribution network backbone network connection, large-scale energy base collection, high-end industrial heavy-duty distribution, etc. under the 35kV voltage level. The product has the characteristics of high insulation strength, high load-bearing capacity, and intelligent integration, and is a benchmark equipment for the upgrading and construction of modern ultra-high voltage distribution networks.

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Features

1. Ultra high voltage insulation strengthening and sufficient operational redundancy:

using modified epoxy resin specifically for ultra-high voltage, with a breakdown strength of ≥ 35kV/mm, optimizing overvoltage protection and insulation spacing design, can effectively resist risks such as lightning overvoltage and operational overvoltage, and the insulation failure rate tends to zero, ensuring the continuous operation of the ultra-high voltage backbone network.

2. Excellent load-bearing and grid connection capabilities:

The rated current can reach 2000A-2500A, the rated short-circuit breaking current is 50kA-63kA, and it can stably carry the collection load of large energy bases and industrial ultra-high voltage heavy loads. It has excellent grid connection switching capabilities and can effectively cope with the impact of new energy output fluctuations.

3. Integrated intelligent control and efficient operation and maintenance:

Equipped with online monitoring of partial discharge, insulation status assessment, and precise fault location modules, it uses 5G+AI data analysis technology to achieve early fault prediction and accurate positioning, supports access to distribution network automation systems, and adapts to unmanned operation and maintenance mode of ultra-high voltage distribution networks.

4. Collaborative adaptation of source, network, and storage, friendly to new energy:

optimized control logic and interface design, seamless integration with large-scale energy storage systems, supporting energy storage charging and discharging scheduling, emergency backup power switching, with a switching time of ≤ 30ms, meeting the requirements of integrated construction of “source, network, and storage” in large-scale new energy bases.

5. Reinforced structure for all working conditions, widely adaptable:

adopting double-layer sealing and anti-corrosion reinforcement technology, with a protection level of IP65, it can operate stably in extreme temperatures of -45 ℃~+85 ℃, high altitudes (≤ 5000m), and strong salt spray environments, and is suitable for outdoor, high-altitude, coastal and other complex scenarios.

Execution standards: GB/T 11022, IEC 62271-200, DL/T 1484, GB/T 3804; Rated parameters: rated current 2000A-2500A, rated short-circuit breaking current 50kA-63kA, rated short-time withstand current 63kA/5s, protection level IP65, operation mode supports manual, electric, remote intelligent control; Material configuration: ultra-high voltage modified epoxy resin, high conductivity copper conductor (silver plated thickened treatment), 3.0mm reinforced anti-corrosion cabinet body; Customized services: Energy storage scheduling module, arc protection, AI operation and maintenance warning can be installed, supporting intelligent distribution network platform docking and transformation.

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    Specification

    Name Unit Parameter
    Rated voltage kV 35
    Rated frequency Hz 50
    Current rating A 630 1250
    Rated insulation level Power frequency withstand voltage Fracture kV 80
    Fireline to Fireline kV 70
    Fireline to ground kV 70
    Withstand voltage for lightning impulses Fracture kV 215
    Fireline to Fireline kV 185
    Fireline to ground kV 185
    Rated short-circuit interrupting current(1s) kA 20 25
    Rated short-time withstand current(4s) kA 20 25
    Rated peak withstand current(1p) kA 50 63
    Rated short-circuit closing current (peak)(1ma) kA 50 63
    Enclosure rating IP4X
    Operating mode Spring-loaded energy storage

    FAQs

    How compatible is the product with large-scale energy storage systems?

    Excellent adaptability, supporting multiple scheduling modes such as grid connected energy replenishment, peak shaving and valley filling, emergency backup, etc. It can automatically respond to grid scheduling instructions through intelligent controllers, achieving the coordinated operation of energy storage systems and ultra-high voltage distribution networks.

    Is special modification required for use in a 5000m high altitude scenario?

    No special modification is required. The insulation structure and conductor spacing have been optimized for high-altitude and low-pressure environments. Through high-altitude special testing, it can operate stably in a 5000m high-altitude scenario and is suitable for high-altitude new energy bases.

    What is the positioning accuracy and response speed of partial discharge monitoring?

    Positioning accuracy ≤ 0.3m, response time ≤ 20ms, can quickly lock the fault location and trigger warning, combined with AI prediction function, provides accurate maintenance basis for operation and maintenance personnel, greatly reducing the time for fault disposal.

    What are the differences in applicable scenarios compared to 40.5kV products?

    35kV is the mainstream level of domestic ultra-high voltage distribution network, with wider adaptability and a focus on backbone networks and new energy bases; 40.5kV focuses on ultra-high voltage core and top-level energy hub, with ultimate carrying capacity and insulation level.

    How effective is the temperature rise control during product operation?

    The temperature rise control reaches the top level in the industry, and the conductor adopts an efficient heat dissipation structure design. The temperature rise under rated load is ≤ 60K, far below the national standard limit. It can operate continuously under heavy load for a long time without any potential heating faults.

    Related Applications

    Large scale photovoltaic base ultra-high voltage collection and distribution network:
    Adapting to the ultra-high voltage collection and distribution network links of large photovoltaic bases such as the Qinghai Tibet Plateau and the northwest desert, such scenarios have high load power, frequent output fluctuations, and are mostly located in high-altitude and extreme temperature environments, requiring extremely high equipment carrying capacity and weather resistance. The 35kV ring main unit has a heavy load carrying capacity that can stably collect large-scale photovoltaic module electricity. The source grid storage coordination function can cope with photovoltaic output fluctuations. The high-altitude and extreme temperature adaptation design can resist the influence of low air pressure and huge temperature differences between day and night. The intelligent monitoring function is convenient for remote operation and maintenance, ensuring the efficient integration of photovoltaic electricity into the ultra-high voltage backbone network.

    Urban ultra-high voltage distribution network backbone network connection:
    Suitable for the core contact nodes of the ultra-high voltage distribution network backbone in large cities, this type of scenario serves as an urban power supply hub, ensuring power supply continuity, scheduling flexibility, and operational stability, carrying the core electricity needs of urban industry, commerce, and residents. The product has high insulation redundancy and fast fault isolation capability, which can achieve load transfer and fault isolation in the backbone network, and control the power outage range to the minimum; The AI intelligent operation and maintenance function can predict potential faults in advance, provide accurate data support for the dispatch center, and strengthen the safety defense line of urban ultra-high voltage distribution network.

    Ultra high voltage distribution in high-end chemical industrial parks:
    Suitable for ultra-high voltage distribution in high-end chemical and fine chemical industrial parks, this type of scenario has dense equipment, high power, and strict requirements for power supply reliability, explosion resistance, and intelligent control. The 35kV ring main unit has a heavy load bearing capacity that can stably support the operation of ultra-high voltage equipment such as large reactors and distillation towers. The explosion-proof module and sealing protection can resist corrosive gas erosion in the park. The intelligent monitoring function can capture equipment abnormalities in real time, avoiding production interruptions and safety risks caused by power distribution failures, and ensuring the continuous operation of high-end processes in the chemical park.

    Coastal port ultra-high voltage distribution network:
    Suitable for ultra-high voltage distribution network scenarios in large coastal ports, where harsh environments such as strong salt spray, high humidity, and frequent lightning strikes exist, requiring stable ultra-high voltage power supply for port loading and unloading equipment and storage systems. The product is designed with IP65 protection and anti-corrosion reinforcement, which can effectively resist salt spray and moisture erosion, and prevent insulation components from aging and failure; The lightning overvoltage resistant design can cope with coastal lightning conditions, stably support the operation of high-power equipment such as gantry cranes and container shore bridges, and ensure the efficient operation of port logistics.

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