SF6 Insulated Ring Main Unit
Fully modular design, 20-year maintenance-free, flexible modular expansion, safe and reliable, supporting distribution network automation upgrades.
Product Description
The HXGN SF6 gas-filled fully insulated ring main unit is suitable for distribution lines and widely used in urban power supply ring networks and end-of-line power supply, especially in small secondary distribution stations, switching stations, industrial and mining enterprises, urban residential areas, airports, railways, tunnels, high-rise buildings, and other power systems for receiving and distributing electrical energy.
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Product Advantages
Safety
Fully enclosed design prevents accidental contact and meets mechanical interlocking requirements.
Scalability
Modular design allows for the addition of various functional units as needed; different units can be arbitrarily combined into an RMU, saving investment costs.
Easy Upgrade
Facilitates upgrading distribution network automation functions.
Reliability
All high-voltage live parts and components are sealed in a stainless steel tank filled with SF6 gas to achieve full insulation, full sealing, and full protection. The cabinet surface is treated with electrostatic spraying, offering corrosion resistance and aging resistance.
Economy
The product has a long service life, with the tank requiring 20 years of maintenance-free operation, significantly reducing customer operation and maintenance costs.
SF6 Insulated Ring Main Unit
HXGN-12
Product Parameter Table
| Item | Value | |||||||
| 12KV Load Switch | 12KV Combined Apparatus | 12KV Circuit Breaker | 17.5KV Circuit Breaker | 40.5KV Load Switch | 40.5KV Combined Apparatus | 40.5KV Circuit Breaker | ||
| Rated Voltage kV | 12 | 12 | 12 | 17.5 | 40.5 | 40.5 | 40.5 | |
| Rated Current A | 630 | 125 | 630 | 200 | 630 | 100 | 630 | |
| Rated Frequency Hz | 50 | 50 | 50 | 60 | 50 | 50 | 50 | |
| Rated Short-Circuit Breaking Current kA | 31.5 | 20 | 21 | 20 | ||||
| Rated Transfer Current | 1750 | 750 | ||||||
| Rated Power-Frequency Withstand Voltage for 1 min | Phase-to-Phase/Phase-to-Ground kV | 42 | 42 | 42 | 38 | 95 | 95 | 95 |
| Across Open Contact kV | 48 | 48 | 48 | 45 | 118 | 118 | 118 | |
| Rated Lightning Impulse Withstand Voltage Peak | Phase-to-Phase/Phase-to-Ground kV | 75 | 75 | 75 | 95 | 185 | 185 | 185 |
| Across Open Contact kV | 85 | 85 | 85 | 110 | 215 | 215 | 215 | |
| Rated Short-Time Withstand Current and Duration kA/s | 20/4 | 20/4 | 21/1 | 20/3 | 20/3 | |||
| Rated Peak Withstand Current kA | 50 | 50 | 54.6 | 50 | 50 | |||
| Rated Short-Circuit Making Current kA | 50 | 50 | 54.6 | 50 | 50 | |||
| Mechanical Life times | 5000 | 5000 | 20000 | 10000 | 5000 | 10000 |
DTU Technical Specifications
| Item | Configuration |
| Power Supply | AC/DC220V + Backup Power Supply |
| AC/DC110V + Backup Power Supply | |
| Maximum Monitoring Capacity | Digital Input Channels: 105 |
| AC Analog Input Channels: 56 | |
| DC Analog Input Channels: 2 | |
| Digital Output Channels: 34 | |
| Line/Switch Monitoring Quantity: 16 | |
| Communication Interfaces | 2 Ethernet Ports, 4 RS232/RS485 Ports |
| DLT634.5101, DLT634.5104, ModBUS, DNP3.0 | |
| Relay Protection | Phase-to-Phase Short Circuit and Single-Phase Ground Fault Monitoring |
| Three-Stage Three-Phase Overcurrent and Two-Stage Zero-Sequence Overcurrent, Reclosing, Post-Acceleration | |
| Fault Recording | Sampling Frequency: 6.4KHz, 1128 Points/Cycle |
| Configurable Number of Cycles, Comtrade 1999 Standard Format | |
| Historical Data Storage | Event Sequence Recording |
| Remote Control Operation Recording, Load Curve | |
| Fixed Point and Extreme Value Recording, Fault Recording Records | |
| Information Security | Dedicated Security Chip Hardware Encryption |
| X.509 Standard Format SM2 Digital Certificate | |
| Performance Indicators | Analog Accuracy: Voltage/Current 0.5%, Others 1% |
| Communication Resolution: 2ms |
Product Dimensions and Packaging
| Name | SF6 Insulated Ring Main Unit (Example: Three-Compartment Combined Cabinet) |
| Equipment Dimensions | 1500*1100*2000 |
| Packaging Method | Wood-Steel Edge Box |
| Packaging Dimensions (mm) | 1900*1500*2200 |
| Packaging Weight (kg) | 650 |
| 20ft Container Capacity L*W*H:5.89*2.39*2.69m | 3 |
| 40ft Container Capacity L*W*H:12.03*2.35*2.69m | 7 |
