VSS-12 Series Solid Insulated Ring Main Unit

The VSS Series Solid-Insulated Ring Main Unit (RMU) employs advanced solid insulation technology and epoxy resin-encapsulated vacuum interrupters for superior electrical performance and environmental protection. This innovative design eliminates the need for SF₆ gas, offering an eco-friendly solution for modern smart grids and power distribution networks. The VSS Series RMU is built to operate in extreme environmental conditions, making it ideal for urban, industrial, and remote installations where reliability and sustainability are key.

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Description

VSS Series Ring Main Unit Structure

VSS Series Ring Main Unit Features

Eco-Friendly Solid Insulation

No explosion risk from internal short circuits or pressure rises.
Durable Design

Sealed pole unit offers a 30-year service life.
High Protection Rating

IP67-rated for exceptional dust and water resistance.

Integrated Three-Position Switch

Combines isolation, earthing, and switching functions in one.
Compact and Reliable

Common-box design simplifies installation, maintenance, and prevents phase-to-phase short circuits.
Smart and Adaptable

Built-in sensors support voltage, current monitoring, and automation, with reliable performance in extreme conditions like high altitudes and cold climates.

Optional Unit

Specifications

Model	Load Switch Cabinet	Circuit Breaker Cabinet	PT Isolation Cabinet
Rated Voltage	12kV	12kV	12kV
Rated Frequency	50Hz	50Hz	50Hz
Rated Current	630A	630A	630A
Rated Power Frequency Withstand Voltage (1min)	42/48kV	42/48kV	42/48kV
Rated Lightning Impulse Withstand Voltage (Peak Value)	75/85kV	75/85kV	75/85kV
Electrical Life	-	E2	-
Mechanical Life	10000	10000	5000
Rated Short-Circuit Breaking Current	-	20kA	-
Rated Closing Current (Peak Value)	50kA	50kA	50kA
Rated Peak Withstand Current of Main Circuit and Ground Circuit	50kA	50kA	50kA
Rated Short-Time Withstand Current of Ground Circuit (2s)	20kA	20kA	20kA
Rated Short-Time Withstand Current of Main Circuit (4s)	20kA	20kA	20kA
Internal Arc Classification (IAC class)	AFLR, 20kA, 1s	AFLR, 20kA, 1s	AFLR, 20kA, 1s
Enclosure Ingress Protection Rating	IP4X	IP4X	IP4X
Dimensions(WDH)(excluding door)	420/440850/8751700/2000mm	420/440850/8751700/2000mm	600850/8751700/2000mm