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Eco-Friendly Gas-Insulated Ring Main Unit

Using dry air instead of SF6, zero-carbon and eco-friendly; compact structure, modular design, integrated intelligent monitoring and fault diagnosis, safe and reliable, supporting green distribution network upgrades.

Product Description

The HXGNA eco-friendly gas-insulated metal-enclosed AC switchgear is a new-generation distribution switchgear developed to support the national “dual carbon” goals. Its technical feature is the use of synthetic dry air as the insulating medium instead of SF6 gas. Vacuum interrupters handle load and fault currents. The equipment layout includes a three-position switch above the vacuum interrupter for switching between conduction, isolation, and grounding functions. The pre-existing ground fault current is closed by the vacuum interrupter within the circuit, effectively preventing arc contamination inside the enclosure. The ring main unit’s dimensions, operating sequence, and “five-prevention” interlocks comply with the State Grid’s standard design specifications.

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Product Advantages

Eco-Friendly Gas-Insulated Ring Main Unit

HXGNA-12
Technical Parameters 12KV Circuit Breaker
Rated Voltage kV 12
Rated Current A 630
Rated Frequency Hz 50
Rated Short-Circuit Breaking Current kA 20
Rated Power-Frequency Withstand Voltage for 1 minPhase-to-Ground/Phase-to-Phase kV42
 Across Open Contacts kV48
Rated Lightning Impulse Withstand Voltage PeakPhase-to-Ground/Phase-to-Phase kV75
 Across Open Contacts kV85
Rated Short-Time Withstand Current and Duration kA/s 20/4
Rated Peak Withstand Current kA 50
Rated Short-Circuit Making Current kA 50
Mechanical Life times 20000
ItemConfiguration
Power SupplyAC/DC 220V + Backup Power
 AC/DC 110V + Backup Power
Maximum Monitoring CapacityDigital Input Channels: 105
 AC Analog Input Channels: 56
 DC Analog Input Channels: 2
 Digital Output Channels: 34
 Line/Switch Monitoring Points: 16
Communication Interfaces2 Ethernet Ports, 4 RS232/RS485 Ports
 DL/T 634.5101, DL/T 634.5104, Modbus, DNP3.0
Protection RelayPhase-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 RecordingSampling Frequency: 6.4 kHz, 1128 Points/Cycle
 Configurable Number of Cycles, Comtrade 1999 Standard Format
Historical Data StorageSequence of Events Recording, Remote Control Operation Logs
 Load Profiles, Fixed-Point and Extreme Value Records
 Fault Recording Logs
Information SecurityHardware Encryption with Dedicated Security Chip
 X.509 Standard Format SM2 Digital Certificate
Performance IndicatorsAnalog Accuracy: Voltage/Current 0.5%, Others 1%
 Remote Signal Resolution: 2 ms
NameEco-Friendly Gas-Insulated Ring Main Unit (Example: Three-Compartment Configuration)
Equipment Dimensions1500*1100*2000
Packaging MethodWood-Steel Edge Box
Packaging Dimensions (mm)1900*1500*2200
Packaging Weight (kg)650
20-Foot Container Capacity L*W*H: 5.89*2.39*2.69m3
40-Foot Container Capacity L*W*H: 12.03*2.35*2.69m7

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