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HV Ring Main Unit | SRM16 SF6 Fully Insulated Compact Ring Main Unit (Common Gas Tank)

HV Ring Main Unit | SRM16 SF6 Fully Insulated Compact Ring Main Unit is a 12kV indoor SF6 fully insulated compact ring main unit designed for ring main and radial power distribution in urban distribution networks, industrial parks, residential communities, commercial buildings, prefabricated substations and small substations. All primary switching devices and the busbar of several functional units are housed in one sealed stainless-steel SF6 gas tank, giving a fully insulated, fully sealed and maintenance-free primary circuit. Each unit has its own mimic-diagram operating face and a separate front cable compartment. It is a very compact solution for urban distribution networks, box-type substations and sites with limited floor space or demanding environmental conditions.

Industry Approvals：
GB 3906
DL/T 404


Availability:



Inquire

Model:
SRM16

Parameter	HV Ring Main Unit
Common Models	XGN86-12, SRM16, SF6-630, Solid Insulated RMU
Construction	Common sealed stainless-steel SF6 gas tank containing busbar and switching devices of all functional units; independent front cable compartments. Compact multi-unit design (typically 2 to 5 functional units in one tank), fully insulated and fully sealed.
Core Function & Performance	Receives and distributes 12 kV power in ring main or radial networks; the load break switch (with or without fuses) switches and protects distribution circuits and transformers, with mechanical interlocks between switch, earthing switch and doors for operator safety.
Technical Specs & Ratings	• Rated Voltage: 12 kV • Standards: GB 3906, DL/T 404 • Main switching device: Load break switch, load break switch-fuse combination or vacuum circuit breaker units sealed in a common SF6 gas tank • Rated current, breaking capacity and dimensions: configured according to project requirements, please contact us.
Typical Application Scenarios	Ring main and radial power distribution in urban distribution networks, industrial parks, residential communities, commercial buildings, prefabricated substations and small substations.

*Data provided on this page is subject to change based on different manufacturers' variances.

Customization Service

We provide flexible customization services, including cabinet function scheme, voltage class, load break switch, fuse, earthing switch and protection configuration, and cabinet color. Custom marking options include nameplates, logos and project-specific identification to meet traceability and branding requirements.

Q	What is SRM16?
A	SRM16 SF6 Fully Insulated Compact Ring Main Unit is a 12 kV indoor SF6 fully insulated compact ring main unit. All primary switching devices and the busbar of several functional units are housed in one sealed stainless-steel SF6 gas tank, giving a fully insulated, fully sealed and maintenance-free primary circuit. Each unit has its own mimic-diagram operating face and a separate front cable compartment.
Q	Which standards does the switchgear comply with?
A	The switchgear is designed and manufactured in accordance with GB 3906 and DL/T 404.
Q	What functional units are available?
A	Typical units include incoming / outgoing load break switch units, load break switch-fuse combination units for transformer protection, metering units and PT units, which can be combined according to your single-line diagram.
Q	What does "common gas tank" mean?
A	The busbar and the switching devices of all functional units are placed in one sealed stainless-steel tank filled with SF6 gas. Compared with single-unit tanks, this reduces the overall width, removes external busbar connections and gives a fully sealed primary circuit that normally needs no gas maintenance during its service life.
Q	Are mechanical interlocks provided?
A	Yes. Mechanical interlocks between the load break switch, earthing switch and cabinet doors are provided to prevent misoperation and protect operators during switching and maintenance.
Q	Where is this switchgear typically used?
A	It is used for receiving and distributing 12 kV power in ring main or radial networks of urban distribution, box-type substations, residential communities, commercial buildings, industrial parks and infrastructure projects where a compact, sealed and maintenance-free unit is required.
Q	What information do you need for a quotation?
A	Please send us your single-line diagram or project specifications, including voltage class, rated current, number and function of units, fuse or protection requirements, and we will prepare a configuration and quotation.
Q	Do you supply complementary products?
A	Yes. In addition to high and low voltage switchgear, we supply power cables, cable accessories, electric power fittings and transformers for complete project packages.