SRM6-12 Fully insulated and enclosed Ring Main Unit

Overview
SRM6-12Fully Insulated Gas-Insulated Ring Network Switchgear execution GB Standard. Design life in indoor conditions (20℃) is over 30 years.
The SRM6-12 fully insulated gas-insulated ring network switchgear, independently developed by our company, has passed the type test at the National High Voltage Electrical Test Center. This product is widely used in 10kV/6kV distribution systems and is the preferred switchgear for various urban and rural users' transformation and distribution systems.
The switch cabinet adopts a modular unit model, allowing for combinations based on diﬀerent applications. It consists of two main categories: ﬁxed units and expandable units, meeting the ﬂexible usage requirements of compact switchgear in various substations.
The SRM6-12 fully insulated gas-insulated ring network switchgear is a completely sealed system, with its live components and switches enclosed within a stainless steel body. The entire switch device is unaﬀected by external environmental conditions, ensuring operational reliability and personal safety. Additionally, it is maintenance-free. By selecting expandable busbars, any combination can be achieved, resulting in full modularity. The expandable busbars are safely insulated and shielded, ensuring reliability and safety.
The SRM6-12 fully insulated gas-insulated ring network switchgear also provides automated solutions tailored to customer needs, creating the concept of intelligent switchgear and minimizing on-site installation and debugging workload.
The SRM6-12 fully insulated gas-insulated ring network switchgear is available in non-expandable standard conﬁgurations and expandable standard configurations. Its full modular and semi-modular combinability, along with self-expandability, offers exceptional flexibility.
The SRM6-12 fully insulated gas-insulated ring network switchgear complies with GB standards and has a design lifespan exceeding 30 years when operated under indoor conditions (20℃).

product details

Model and Definitions

For example:

◇ SRM6-12-C/630DL indicates a load switch cabinet with a nominal voltage of 12kV, rated current of 630A, right-side expansion, and left-side cable entry and exit method.

◇ SRM6-12-CF/6301R signifies a combination unit formed by a load switch cabinet and a fuse combination cabinet. It has a bus voltage of 12kV and a bus current of 630A, with left-side expansion and right-side cable entry and exit method.

Performance Indexes

Unit Code	Definition	Unit Code	Definition
C	Standard Single Set Load Switch Unit	-	Busbar Top Insulator
F	Load Switch-Fuse Composite Apparatus Unit	SL	Bus Coupler Unit
V	Circuit Breaker Unit	M	Measurement Unit
D	Cable Entry Unit (Without Switch)	PT	PT UNIT
+	Busbar Side lnsulator	1K2(4)	Load Switch Unit with Double Insulator

Technical Specifications

Model	C Module	F Module	V Module		CB Module
Model	Compound Switch	Composite Apparatus	Vacuum Switch	Isolation/ Earthing Switch	Vacuum Breaker	Isolation/ Earthing Switch
Nominal Voltage KV	12	12	12	12	12	12
Rated Frequency Hz	50	50	50	50	50	50
Power Frequency Withstand Voltage (Interphase/Terminal) KV	42/48	42/48	42/48	42/48	42/48	42/48
Lighting lmpulse Withstand Voltage kV	75/85	75/85	75/85	75/85	75/85	75/85
Rated Currency A	630	Note ¹	630		1250/630
Rated Closed Loop Breaking Current A	630
Rated Cable Charge BreakingCurrent A	135/135
Rated Circuit Making Current(Peak) A	50	80
Rated Peak Withstand Current kA	50
Rated Short-time Withstand Current :A/3s	20
Rated Short-circuit Breaking Current kA		31.5	20		25
Rated Transfer Current A		1750
Maximum CurrentforCompatible Fuses A		125
Loop Resistance Ω	≤ 300	≤ 600
Machinery Service Life Time	5000	3000	5000	2000	5000	5000