- Telephone: +86-139-8977-9778
- Email: jack@toonice.com
- English
NSGTG-20
NSGTG-20 Solid Insulated Switchgear
The 20kV solid insulated ring main unit is the main equipment of the core node of the medium and high voltage distribution network. It adopts the integrated casting process of ultra-high voltage modified epoxy resin and fully seals the core components such as high-voltage conductors, vacuum circuit breakers, partial discharge monitoring modules, etc. 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 the distribution network backbone network connection, large-scale new energy base collection, and heavy-duty industrial distribution under the voltage level of 20kV. The product has the characteristics of high insulation strength, high load-bearing capacity, and intelligent integration, which can cope with the complex working conditions of the core links of medium and high voltage distribution networks. It is the preferred equipment for upgrading modern medium and high voltage distribution networks.
Features
1. High insulation strength and sufficient operational redundancy:
Adopting ultra-high voltage modified epoxy resin with a breakdown strength of ≥ 30kV/mm, optimizing overvoltage protection and insulation spacing design, it can effectively resist risks such as lightning overvoltage and operation overvoltage, and the occurrence rate of insulation faults tends to zero, ensuring the continuous operation of the distribution network backbone.
2. Excellent load-bearing and grid connection capabilities:
The rated current can reach 1600A-2000A, and the rated short-circuit breaking current is 40kA-50kA. It can stably carry large industrial heavy-duty and new energy base collection loads, and has excellent grid connection switching capabilities, which can effectively cope with the impact of new energy output fluctuations.
3. Intelligent management and control integration, and efficient operation and maintenance:
the standard configuration of online monitoring of partial discharge, insulation status assessment, and accurate fault location modules, real-time data analysis and fault prediction through 5G+edge computing technology, support access to the distribution network automation system, and adapt to the unattended operation and maintenance mode of the medium and high voltage distribution network.
4. Energy storage linkage adaptation, new energy friendly:
optimized control logic and interface design, seamless integration of energy storage system, support energy storage charging and discharging scheduling and emergency backup power switching, switching time ≤ 40ms, in line with the integrated needs of “source network storage” in large new energy bases.
5. Structural reinforcement design, widely adaptable to working conditions:
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 1600A-2000A, rated short-circuit breaking current 40kA-50kA, rated short-time withstand current 50kA/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), 3.0mm reinforced anti-corrosion cabinet body; Customized services: can install energy storage scheduling modules, arc protection, partial discharge positioning monitoring, and support intelligent operation and maintenance platform docking and transformation.
Let’s Get Started
Providing you with the most trusted energy solutions in an unpredictable world.
Contact UsRequest an Insurance Quote
Specification
| Name | Unit | Parameter | |||
| Rated voltage | kV | 20 | |||
| Rated frequency | Hz | 50 | |||
| Current rating | A | 630 | 1250 | ||
| Rated insulation level | Power frequency withstand voltage | Fracture | kV | 60 | |
| Fireline to Fireline | kV | 50 | |||
| Fireline to ground | kV | 50 | |||
| Withstand voltage for lightning impulses | Fracture | kV | 145 | ||
| Fireline to Fireline | kV | 125 | |||
| Fireline to ground | kV | 125 | |||
| 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 | ||||
Download
Related Products
FAQs
How compatible is the linkage between the product and the energy storage system, and what scheduling modes are supported?
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 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.
Can partial discharge monitoring achieve accurate positioning of fault points?
Yes, it comes standard with a partial discharge positioning monitoring module with a positioning accuracy of ≤ 0.5m, which can quickly lock the fault location. With the fault prediction function, it provides accurate maintenance basis for operation and maintenance personnel and shortens the fault disposal time.
What are the differences in applicable scenarios compared to 22kV products?
20kV is the mainstream level of medium and high voltage distribution network, with wider adaptability, focusing on the main network of distribution network and new energy base; 22kV is mainly used for rail transit and overseas special scenarios, with the same structural framework and only different voltage and insulation parameters.
How effective is the temperature rise control during product operation?
Excellent temperature rise control, the conductor adopts an efficient heat dissipation structure design, and the temperature rise under rated load is ≤ 65K, far below the national standard limit. It can operate continuously under heavy load for a long time without any potential heating faults.
Related Applications
Distribution of collection lines for large-scale wind power bases:
Adapting to the distribution and grid connection links of large-scale wind power bases, such scenarios have high load power and frequent output fluctuations, requiring extremely high equipment carrying capacity, grid stability, and energy storage linkage. The heavy load carrying capacity of the 20kV ring main unit can stably collect wind power, and its excellent grid connection switching ability can cope with the impact of wind power output fluctuations. The energy storage linkage function can achieve peak shaving and valley filling of electricity. The high-altitude weather resistant design is suitable for wind power bases located in high-altitude and mountainous areas, ensuring efficient integration of wind power into the distribution network.
Liaison nodes of the main network of the medium and high voltage distribution network:
Suitable for the contact nodes of the high-voltage distribution network backbone in cities and regions, this type of scenario serves as the core hub of the distribution network, ensuring power supply continuity, scheduling flexibility, and operational stability. The product has high insulation redundancy and fast fault isolation capability, which can achieve load transfer and fault isolation of the distribution network backbone. The intelligent monitoring function facilitates real-time control of equipment status by the dispatch center, supports unmanned operation and maintenance, and builds a strong operational defense line for the core hub of the medium and high voltage distribution network.
High voltage distribution in large industrial and commercial parks:
Suitable for the medium and high voltage distribution links in large industrial and commercial parks (such as automobile industry parks and electronics industry parks), this type of scenario is load intensive, has many high-power equipment, and requires high reliability and intelligent control of power supply. The product’s overload carrying capacity can stably support the operation of multiple loads such as production lines, central air conditioning, and energy storage equipment in the park. The intelligent monitoring and remote control functions facilitate the unified control of park operation and maintenance personnel, and the fault prediction function can avoid potential risks in advance, ensuring the continuous and orderly production and operation of the park.
High altitude photovoltaic base distribution network:
It is applicable to the distribution network links of high-altitude photovoltaic bases such as the Qinghai Tibet Plateau and the Yunnan-Guizhou Plateau. Such scenarios have high altitude, low air pressure, and severe temperature changes, which require strict weather resistance and insulation performance of equipment. The product is designed for high-altitude adaptation and extreme temperature tolerance, which can resist insulation performance degradation and huge temperature differences between day and night in low-pressure environments. The energy storage linkage function can cope with fluctuations in photovoltaic output, and the intelligent remote control function is suitable for the shortage of operation and maintenance personnel in high-altitude areas, ensuring efficient distribution and grid connection of photovoltaic energy.
High voltage distribution network in coastal areas:
Suitable for medium and high voltage distribution network scenarios in coastal cities and ports, where harsh environments such as strong salt spray and high humidity exist, requiring extremely high anti-corrosion and sealing performance of equipment. The product is designed with IP65 protection and anti-corrosion reinforcement, which can effectively resist salt spray and moisture erosion, avoid insulation component aging and failure, and high insulation strength can cope with overvoltage risks caused by frequent lightning strikes in coastal areas, ensuring stable power supply for port loading and unloading equipment and urban backbone networks.
