Dingli Electric's main products include five series: environmentally friendly ring network cabinets, environmentally friendly high-voltage metering cabinets, deeply integrated pole-mounted switches, European-style box-type transformers, Siemens-authorized NXAirsLP medium-voltage cabinets and SIVACON 8PT low-voltage cabinets, and Eaton-authorized RVAC series ring network cabinets, etc.
DLNH101-12
Environmentally friendly gas-insulated ring main unit metal-clad switchgear
The DLNH101-12 type environmentally friendly gas-insulated ring main unit (GIS) enclosure is filled with dry air at a pressure of 0.02 MPa and can operate at zero gauge pressure. A pressure equalization hood is used to optimize the electric field within the enclosure, creating a slightly non-uniform electric field to ensure insulation performance. There are no inter-phase insulating barriers, and the contacts are not encapsulated. The structure is simple, eliminating the risk of insulation aging and failure. The design concept of a minimum functional pressure as low as zero gauge pressure reduces equipment leakage and ensures that the equipment's insulation performance is not reduced even when the equipment leaks to zero gauge pressure, allowing for ample time to schedule power outages for inspection and maintenance, thereby increasing equipment reliability.
Product Classification:
Key words:
- Product Overview
The DLNH101-12 type environmentally friendly gas-insulated ring main unit (RMU) is filled with dry air in the gas compartment, with a charging pressure of 0.02 MPa and can operate at zero gauge pressure. A pressure equalization hood is used to optimize the electric field within the gas compartment, creating a slightly uneven electric field to ensure insulation performance. There are no inter-phase blocking insulation baffles, and the contacts are not encapsulated with insulation components. The structure is simple, eliminating the risk of insulation aging and failure. The design concept of a minimum operating pressure as low as zero gauge pressure reduces equipment leakage rate. Even when the equipment leaks to "0" gauge pressure, the insulation performance is not reduced, allowing for ample time to schedule power outages for inspection and maintenance, increasing equipment reliability.
- Product Features
●Compact and miniaturized structure, with a footprint comparable to SF6 gas-insulated ring main units.
● Utilizes a pressure equalization hood shielding structure, without blocking insulation baffles or insulation component encapsulation, eliminating the risk of insulation aging and failure.
● High insulation strength; meets normal insulation requirements at "0" gauge pressure.
● The transmission structure and operating mechanism are consistent with SF6 ring main units, with up to 75% commonality and lower cost.
● Uses a vacuum circuit breaker or vacuum load switch + three-position isolating switch structure, eliminating the risk of insulation gas degradation and enhancing reliability.
● Advanced laser cutting and welding manufacturing processes, with a product lifespan of up to 30 years.
● Complete production line process control, leading domestic product consistency and stability.
- Product Parameters
Serial Number | Item Name | Unit | Parameter Value | |
1 | Rated Voltage | kV | 12 | |
2 | Rated Frequency | Hz | 50 | |
3 | Rated Current | Load switchgear, circuit breaker cabinet, metering cabinet | A | 630 |
4 | Rated short-time withstand power frequency voltage (1min, RMS) | Between contacts | kV | 48 |
Phase-to-phase, phase-to-ground, vacuum contact | 42 | |||
Auxiliary and control circuits | 2 | |||
5 | Lightning impulse withstand voltage peak (1.2/50μs) | Between contacts | kV | 85 |
Phase-to-phase, phase-to-ground, vacuum contact | 75 | |||
6 | Partial discharge level 1.2Ur | pC | ≤10 | |
7 | Rated short-time withstand current | kA | 20 | |
8 | Rated peak withstand current | kA | 50 | |
9 | Rated short-circuit duration | s | 4 | |
10 | Ground switch short-circuit closing capacity | Times | 2 | |
11 | Dry air gas pressure (20℃ gauge pressure) | Rated pressure | Mpa | 0.02 |
Minimum operating pressure | 0 | |||
12 | Annual gas leakage rate | %/year | ≤0.05 | |
13 | Gas humidity (volume fraction) | ppm | ≤250x10-6 | |
14 | Internal arc test (20kA) (cable chamber and gas compartment) | s | 0.5 (AC) | |
15 | Isolating switch/ground switch mechanical life | Times | 3000 | |
16 | Protection level | Gas compartment |
| IP67 |
Cabinet |
| IP4X | ||
- Application Environment
● Applicable locations: The DLNH101-12 environmentally friendly gas-insulated metal-enclosed ring main unit is suitable for 12kV secondary distribution systems, used in ring main power supply, double-radial power supply, and cable-fed networks in industrial and commercial areas, as well as rural and township areas with high power load density.
● Location of use: Indoor
● Ambient air temperature: -25°C~+45°C
● Altitude: Not exceeding 3000m
For other special usage conditions, please contact us.
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The main products of Dingli Electric are five series: environment-friendly ring network cabinet, environment-friendly high-voltage metering cabinet, deep fusion column switch, European box transformer, Siemens authorized NXAirsLP medium-voltage cabinet and SIVACON 8PT low-voltage cabinet, Eaton authorized RVAC series ring network cabinet, etc.
