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NSGTG-3.3
NSGTG-3.3 3.3kV Solid Insulated Switchgear
The NSGTG 3.3kV solid-state insulated switchgear is a compact switchgear specifically designed for 3.3kV medium-voltage distribution networks. It utilizes epoxy resin solid-state insulation technology, enabling safe and environmentally friendly switching operations without the need for insulating oil or SF6 gas. This switchgear is widely used in terminal distribution systems, small industrial facilities, and urban power grids where space utilization and operational safety are critical.
The 3.3kV Solid Insulated Switchgear is manufactured according to GB/T 11022 and relevant industry standards, suitable for radial power supply and terminal distribution applications at 3.3kV voltage levels. It is widely used in urban distribution networks, commercial buildings, and small industrial power systems, providing safe and reliable power distribution. The 3.3kV solid insulated switchgear’s compact, sealed structure integrates load switches, grounding switches, and basic metering modules, providing reliable switching and protection for the distribution system.
High-voltage components are fully encapsulated using epoxy resin casting technology, improving insulation strength, operational safety, and long-term reliability. The equipment is designed for easy installation, convenient operation, and extremely low maintenance, making it ideal for space-constrained environments.
Features
1. Ultra-Compact Design for Space-Limited Installations
The 3.3kV solid insulated switchgear features an ultra-compact cabinet design with a width of less than 600 mm, reducing overall volume by about 30% compared with conventional equipment. Its compact footprint makes it ideal for residential distribution rooms, small commercial equipment rooms, and building utility spaces where installation space is limited.
2. Lightweight Structure and Easy Installation
With a total weight of under 300 kg, the solid insulated switchgear can be transported and installed without heavy lifting equipment. This lightweight design simplifies installation and reduces foundation requirements, helping lower deployment costs and construction time for small distribution projects.
3. Reliable Solid Insulation with Minimal Maintenance
The solid insulated switchgear uses epoxy resin solid insulation optimized for 3.3kV distribution systems. The material offers strong resistance to aging, humidity, and condensation. Routine maintenance requirements are minimal, typically limited to annual visual inspections, significantly reducing long-term operation and maintenance costs.
4. Designed for Civil and Light Industrial Loads
The switchgear supports rated currents of 630A–800A, making it suitable for common civilian and light industrial loads. With an IP4X protection rating, along with grounding and anti-misoperation protection, it provides reliable safety performance for residential and commercial power distribution environments.
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Specification
| Name | Unit | Parameter | |||
| Rated voltage | kV | 3.3 | |||
| Rated frequency | Hz | 50 | |||
| Current rating | A | 630 | 1250 | ||
| Rated insulation level | Power frequency withstand voltage | Fracture | kV | 12 | |
| Fireline to Fireline | kV | 10 | |||
| Fireline to ground | kV | 10 | |||
| Withstand voltage for lightning impulses | Fracture | kV | 23 | ||
| Fireline to Fireline | kV | 20 | |||
| Fireline to ground | kV | 20 | |||
| 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 | ||||
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FAQs
Can this product be used in outdoor settings?
Supports outdoor installation, with a protection level of up to IP54 after installing a rain cover, which can resist rain and dust invasion, and is suitable for outdoor substations in residential areas, rural outdoor distribution points, and other scenarios.
What are the advantages compared to traditional air insulated ring main units?
The core advantages are sealed insulation, no condensation risk, and smaller size and lighter weight, without the need for regular cleaning of insulation components, making it more suitable for low-cost operation and maintenance needs in civilian scenarios.
Does it support dual operation of manual and electric?
Supports, comes standard with a manual operating mechanism, and can be equipped with an electric operating module as needed to meet the dual needs of manual emergency operation and simple remote control in small scenarios.
How long is the service life and warranty period?
Under normal working conditions, the service life is ≥ 18 years. The insulation components are guaranteed for 10 years, and the cabinet and core components are guaranteed for 5 years. During the warranty period, free maintenance and component replacement services can be enjoyed.
Is solid insulated switchgear environmentally friendly?
Yes. Solid insulated switchgear is considered environmentally friendly because it uses epoxy resin insulation instead of oil or SF6 gas. This design reduces the risk of gas leakage and environmental pollution while maintaining safe and reliable electrical insulation performance.
What is 3.3kV solid insulated switchgear?
3.3kV solid insulated switchgear is a compact power distribution device designed for medium-voltage distribution systems.
Related Applications
Residential Communities and Urban Village Distribution
The NSGTG 3.3kV solid insulated switchgear is ideal for terminal distribution networks in residential communities and urban redevelopment areas. These environments often have limited space in distribution rooms and high residential density. With minimal maintenance requirements, the switchgear provides stable and safe daily power supply for residential buildings.
Small Commercial Complexes and Retail Areas
The 3.3kV solid insulated switchgear is well suited for power distribution in small commercial complexes, supermarkets, convenience stores, and clusters of street shops. The compact cabinet design allows flexible installation in back rooms or utility corners, supporting loads such as lighting, HVAC systems, and retail equipment. Built-in safety and anti-misoperation protection help prevent accidents and ensure reliable commercial operations.
Rural and Remote Area Power Distribution
The 3.3kV solid insulated switchgear is also suitable for rural power grid upgrades and terminal distribution in remote villages. The robust design can operate in challenging outdoor environments, including high temperatures, rain, and snow. With low maintenance requirements, it helps improve power supply reliability in rural and remote distribution networks.
