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Air (Environmentally Friendly Gas) Insulated Ring Main Unit

Name: Air (Environmentally Friendly Gas) Insulated Ring Main Unit
Brand: Zhejiang Tenrony Electricity Co., Ltd.
Availability: InStock

The environmentally friendly air-insulated AC metal-enclosed switchgear is an environmentally friendly switchgear independently developed by air insulated ring main unit company based on the development trend of the power industry and the experience accumulated over many years in providing on-site services and design and construction for distribution networks. This high voltage switchgear for sale aims to provide high-quality and environmentally friendly products for China's distribution networks. The development is based on the digestion and absorption of advanced domestic and foreign technologies and design concepts. The air insulated ring main unit is particularly suitable for use in small secondary distribution substations, switchgear stations, industrial and mining enterprises, urban residential areas, airports, railways, tunnels, high-rise buildings, and other power systems as a means of receiving and distributing electrical energy.

Products

Features

Superior Design: Air insulated ring main unit features a well-engineered overall structure that is compact and space-efficient, effectively minimizing installation footprint while maintaining optimal performance.

Reliable Performance: Air insulated ring main unit provides a stable and dependable power supply, ensuring uninterrupted operation of the power system and minimizing disruptions caused by power-related issues.

User-Friendly: The installation process is straightforward and requires no complex procedures, enabling rapid deployment. The air insulated ring main unit's flexible operation allows personnel to easily make adjustments in accordance with actual operational requirements.

Cost-Effective Solution: Combining outstanding performance with a user-friendly experience, air insulated ring main unit offers excellent value for money, delivering substantial benefits to users.

Parameters

Main Technical Parameters
Project			Unit	Circuit Breaker Unit Load Switch Unit
Rated Voltage			kV	12
Rated Frequency			Hz	50
Rated Current			A	630
1min Power Frequency Withstand Voltage	Ground, Phase-to-Phase		kV	42
	Between the Breaks			48
Lightninglmpulse Withstand Voltage	Ground, Phase-to-Phase		kV	75
	Between the Breaks			85
Rated Short-Time Withstand Current and Duration	Main Circuit		kA	20/4s
	Grounding Circuit			17.4/2S
Rated Peak Withstand Current	Main Circuit		kA	50
	Grounding Circuit			43.5
Rated Short-Circuit Making Current(Peak Value)			kA	50
Rated Short-Circuit Breaking Current			kA	20	/
Rated Short-Circuit Breaking Current Making Times			Times	30	/
Rated Operation Sequence				0-0.3S-CO- 180S-CO
Rated Cable/Line Charging Breaking Test				C2级	/
Asymmetrical Phase-to-ground Fault Breaking Current			kA	17.4	/
Rated Active Load Breaking Current			A	/	630
Rated Closed-Loop Breaking Current			A	/	630
Rated Cable Charging Breaking Test			A	/	10
5%Rated Active Load Breaking Current			A	/	31.5
Number of Grounding Switch Closing				5
Loop Resistance			uΩ	≤140
Rated Gas Pressure(Gauge Pressure at 20℃)			Mpa	0.02
Mechanical Life		Vacuum Circuit	Times	10000
		Isolation Switch		3000
		Grounding Switch		3000
Protection Level			Casing Gas Tank	IP4X
				IP67
Operating Power Supply			V	AC220/DC220/DC110/ DC48/DC24
Rated Annual Leakage Rate			%	≤0.1
Cabinet Size(Single Circuit)			mm	420×822×1420
Withstand Internal Arc Fault			kA/s	20/0.5
Moisture Content in Dry Air			ppm	≤150

Vacuum Switch Mechanical Characteristics Parameters
Project	Unit	Vacuum Circuit Breaker	Load Switch Unit
Contact Opening Distance	mm m/s	8±1
Contact Overtravel		3.5±1
Average Opening Speed(6mm after opening)		1.2±0.2
Average Closing Speed(6mm before closing)		0.8±0.2
Contact Bounce Time at Closing		≤2
Three-Phase Synchronization of Closing		≤2
Three-Phase Synchronization of Opening	ms	≤2
Closing Time		30-70	≤900
Opening Time		18-50
Phase-to-Phase Distance	mm	150±1.5
Contact Bounce Amplitude at Opening	mm	≤1.5
Contact Overtravel Amplitude at Opening	mm	≤2
Rated Contact Pressure	N	1600±160	1100±100

Isolating and Grounding Switch Main Technical Parameters and Characteristic Parameters
Item			Unit	Isolating Switch Grounding Switch
Rated Voltage			kV	12
Rated Frequency			Hz	50
Rated Current			A	630
1min Power Frequency Withstand Voltage		Between Phases and to Ground Across the Break	kV	42
				48
Lightning Withstand	Impulse Voltage	Between Phases and to Ground Across the Break	kV	75
				85
Rated Short-Time Withstand Current and Duration			kV	20/4s
Rated Peak Withstand Current			kV	50
Mechanical Life			Times	3000
Contact Pressure			N	160±20
Manual Closing Operation Force			N	≤200
Manual Opening Operation Force			N	≤200
Dynamic and Static Contact Opening Distance			mm	≥100 100
Phase-to-Phase Distance			mm	150±1.5
Synchronization of Grounding Switch Closing			ms	/ ≤2

Benefits

Normal operating conditions

Ambient air temperature: Upper limit+40°℃, lower limit-40°℃
Humidity: Average daily relative humidity not exceeding95%;
Average monthly relative humidity not exceeding90%.
Water vapor pressure: Average daily value not exceeding 2.2kPa;
Average monthly value not exceeding 1.8kPa;
Altitude not exceeding 2000m.
The surrounding air is not significantly polluted by dust, smoke, corrosive, flammable gases, vapors, or salt-mist.
The amplitude of electromagnetic interference induced in the secondary system does not exceed1.6kV.

Use

Scope of Application

Voltage and Frequency: Designed for use in distribution systems operating at a rated voltage of 12 kV and a three-phase AC frequency of 50 Hz.
Application Scenarios: Specifically engineered for deployment in small secondary substations, switchgear stations, industrial and mining facilities, urban residential districts, airports, railway networks, tunnels, and high-rise buildings, ensuring efficient transmission and distribution of electrical power across diverse infrastructure systems.

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