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Eco-Friendly Gas-Insulated Ring Main Unit

Product Description

The HXGNA-12 eco-friendly gas-insulated metal-enclosed AC switchgear is a new generation of distribution switchgear developed to support the national “dual carbon” goals. Its technical features include the use of synthetic dry air as the insulating medium instead of SF6 gas, with vacuum switches for load and fault current switching. The equipment layout incorporates a three-position switch above the vacuum switch for switching between conduction, isolation, and grounding functions. The pre-set grounding short-circuit current of the line is closed by the vacuum switch within the circuit, effectively preventing arc contamination of the cabinet interior during closing. The ring main unit’s dimensions, operating sequence, and “five-prevention” interlocking comply with the specifications of the State Grid’s standard design scheme.

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Product Advantages

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Eco-Friendly Gas Insulation

Uses eco-friendly media such as dry air, nitrogen, or mixed gases to replace traditional SF6 gas, reducing the greenhouse effect.

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High Reliability

High mechanical and electrical performance ensures long-term stable operation.

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Modular Design

Modular structure for easy installation, maintenance, and expansion.

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Intelligent

Can integrate intelligent monitoring system for remote monitoring and fault diagnosis.

Eco-Friendly Gas-Insulated Ring Main Unit

HXGNA-12（紧凑型）

Product Parameter Table

Technical Parameters	12KV Circuit Breaker
Rated Voltage kV	12
Rated Current A	630
Rated Frequency Hz	50
Rated Short-Circuit Breaking Current kA	20
Phase-to-Phase/Phase-to-Ground kV	42
Across the Open Contact kV	48
Phase-to-Phase/Phase-to-Ground kV	75
Across the Open Contact kV	85
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

DTU Technical Specifications

Item	Configuration
Power Supply	AC/DC220V + Backup Power
	AC/DC110V + Backup Power
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 Interface	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: 6.4 kHz, 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 Data
Information Security	Dedicated Security Chip Hardware Encryption
	X.509 Standard Format SM2 Digital Certificate
Performance Indicators	Analog Accuracy: Voltage/Current 0.5%, Others 1%
	Remote Signal Resolution: 2 ms

Product Dimensions and Packaging

Name	Equipment Dimensions
Equipment Dimensions	150011002000
Packaging Method	Wood-Steel Edge Box
Packaging Dimensions (mm)	190015002200
Packaging Weight (kg)	650
Eco-Friendly Gas-Insulated Ring Main Unit (Example: Three-Compartment Combined Cabinet)	20ft Container Capacity LWH: 5.892.392.69m
	40ft Container Capacity LWH: 12.032.352.69m

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