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HWX-12 Outdoor Ring Main Unit(Outdoor Switchgear).jpg

HWX-12 Outdoor Ring Main Unit: China Suppliers & Factory for 12kV/24kV Gas-Insulated Switchgear

The HWX-12 Series Outdoor Ring Main Unit is a state-of-the-art gas-insulated switchgear specifically designed for 12kV/24kV distribution networks. Manufactured by leading China suppliers, this fully sealed unit leverages advanced international technology to ensure exceptional performance and safety. With its compact and robust stainless steel construction rated at IP67, the HWX-12 is adept at withstanding harsh environmental conditions commonly found in industrial zones, residential areas, and commercial centers. This innovative product offers modular flexibility and maintenance-free operation, making it an ideal choice for modern power systems. Additionally, it supports expandable smart grid automation, positioning it as a durable and cost-effective solution for today's energy demands. Trust our factory for reliable and high-quality power distribution solutions

Product Details

Product Model

HWX-12 Outdoor Ring Main Unit (Outdoor Switchgear)

Technical Parameters

Item Name			Unit	C-Load Switch Unit	F-Combined Apparatus Unit	V-Circuit Breaker Unit
Item Name			Unit	Data	Data	Data
Rated Voltage			kV	12/24	12/24	12/24
Rated Frequency			Hz	50	50	50
Rated Current			A	630	125	630
Rated Transfer Current			A		1750
Rated Insulation Horizontal	1min Power Frequency Withstand Voltage (Phase to Ground)	Phase-to-Phase, Phase-to-Ground	kV		42/65
	1min Power Frequency Withstand Voltage (Phase to Ground)	Across the Break	kV		48/79
	Lightning Impulse Withstand Voltage	Phase-to-Phase, Phase-to-Ground	kV		75/125
	Lightning Impulse Withstand Voltage	Across the Break	kV		85/145
Rated Short-Circuit Breaking Current			kV	20	315	20
Rated Short-Circuit Making Current			kA	50	80	50
Rated Short-Circuit Making Current (Grounding Switch)			kA	50		50
Rated Short-Time Withstand Current		Main Circuit	kA	20	20	20
Rated Short-Time Withstand Current		Grounding Switch	kA	20	20	20
Rated Short-Time Duration		Main Circuit	S	4		4
Rated Short-Time Duration		Grounding Switch	S	4	4	4
Rated Peak Withstand Current		Main Circuit	kA	50		50
Rated Peak Withstand Current		Grounding Switch	kA	50	50	50
Internal Arc Test (Internal Arcing Test)			A	630	20kA/0.5s	630
Rated Closed-Loop Breaking Current			A	630	Restricted by Fuse	630
Rated Active Load Breaking Current			A	10	Restricted by Fuse	25
Rated Cable Charging Breaking Current			Times	5000	17.4	3000
Mechanical Life	Load/Isolation Switch		Times	3000	5000	3000
	Grounding Switch		Times		3000	10000
	Vacuum Circuit Breaker		Mpa
SF6 Gas Pressure (Absolute Pressure at 20℃)					0.035
Yearly Leakage Rate					≤0.025% Year
Cabinet and Fuse Protection Level					IP67
Cabinet and Enclosure Protection Level					IP41
Outdoor Ring Main Unit Protection Level					IP44W

Frequently Asked Questions

What is the rated voltage of the HWX-12 Outdoor Ring Main Unit?

The HWX-12 Outdoor Ring Main Unit supports a rated voltage of 12/24 kV across all unit types — including the C-Load Switch Unit, F-Combined Apparatus Unit, and V-Circuit Breaker Unit — making it suitable for medium-voltage distribution networks.

What is the IP protection level of the HWX-12 Outdoor Ring Main Unit?

The unit offers multiple protection levels: the cabinet and fuse compartment achieves IP67, the cabinet enclosure is rated IP41, and the overall outdoor ring main unit is rated IP44W, ensuring reliable protection against dust, water, and harsh outdoor environments.

What type of insulating gas is used in the F-Combined Apparatus Unit, and what is its leakage rate?

The F-Combined Apparatus Unit uses SF6 gas as the insulating medium, with an absolute pressure of 0.035 MPa at 20℃. The yearly leakage rate is strictly controlled to ≤0.025% per year, ensuring long-term insulation reliability and environmental safety.

What is the mechanical life of the load/isolation switch in the HWX-12 unit?

The mechanical life of the load/isolation switch varies by unit type: the C-Load Switch Unit and V-Circuit Breaker Unit are rated for 3,000 operations, while the F-Combined Apparatus Unit is rated for 5,000 operations, reflecting its higher operational durability.

What are the short-circuit withstand capabilities of the HWX-12 Outdoor Ring Main Unit?

All three unit types feature a rated short-time withstand current of 20 kA (for both main circuit and grounding switch), a rated peak withstand current of 50 kA, and a rated short-time duration of 4 seconds, ensuring robust performance under fault conditions.

Does the HWX-12 Outdoor Ring Main Unit support internal arc testing?

Yes. The HWX-12 has passed internal arc testing (Internal Arcing Test). The C-Load Switch Unit and V-Circuit Breaker Unit are tested at 630 A, while the F-Combined Apparatus Unit is tested at 20 kA for 0.5 seconds, confirming its safety under internal arc fault scenarios.