Product Overview

JSR series gas insulated compact ring main unit (Gas Insulated Ring Main Unit) is a new type of gas insulated medium voltage independently developed by our company in accordance with the standardization and customization requirements of the State Grid. The switchgear adopts a modular design and can be arranged arbitrarily according to different design plans to achieve the perfect combination of common box units and extended units to meet the needs of various secondary transmission and distribution substations for flexible use of compact switch cabinets.

JSR series switchgear is a completely sealed system. All its live parts and switches are sealed in a stainless steel shell and are not affected by the environment; it has reliable operation and guarantee Safety, compact structure design, small footprint, maintenance-free, long life and other characteristics.

The product has passed the type test verification of the National High Voltage Electrical Test Center and is widely used in small secondary distribution stations, box-type switching stations, industrial and mining enterprises, airports, railways, commercial areas, high-rise buildings, and highways , subways, tunnels and areas with harsh natural conditions.

Technical parameters

Name			Unit	Load Switch unit (R)	Combined electrical unit (T)	Circuit breaker unit (L)
Rated voltage			kV	12/24	12/24	12/24
Rated frequency			Hz	50	50	50
Rated current			A	630	125 (depending on fuse current)	630
Rated insulation level	1min power frequency withstand voltage	Phase to phase, ground to ground	kV	42/65	42/65	42/65
		Fracture	kV	48/79	48/79	48/79
		Control and Auxiliary Loop	kV	2/2	2/2	2/2
	Lightning impulse resistance Voltage	phase to phase, ground	kV	75/125	75/125	75/125
	Lightning impulse resistance Voltage	Fracture	kV	85/145	85/145	85/145
Rated short-time withstand current			kA /s	25/4	--	25/4
Rated peak withstand current			kA	63	--	63
Rated short circuit making current			kA	63	Limited by high voltage fuse	63
Rated short circuit breaking current			kA	--	Limited by high voltage fuse	25/25
Rated transfer current			A	--	1700/1400	--
Rated active load breaking current			A	630	--	--
Rated closed-loop breaking current			A	630	--	630
Mechanical life	Compliant with switches/circuit breakers		times	10000	10000	2000
Mechanical life	Isolating/grounding switch		times	3000	3000	3000
Loop resistance			μΩ	≤150	--	≤150
Filling gas				SF6/C4 mixed gas	SF6/C4 mixed gas	SF6/C4 mixed gas
SF6 rated charging pressure ( 20℃ display)			Mpa	0.14	0.14	0.14
C4 mixed gas rated inflation Pressure (displayed at 20℃)			Mpa	0.02	0.02	0.02
Relative leakage per year Rate			%	0.01	0.01	0.01
IP protection level	Cabinet			IP4X	IP4X	IP4X
IP protection level	Air box			IP67	IP67	IP67

Switchgear dimensions

Cabinet type	Width (mm)	Depth (mm)	Height (mm)	Instrument box (mm)
Load switch cabinet	375	750	1600	200/350
Circuit breaker cabinet	420	750	1600	200/350
Combined electrical cabinet	420	750	1600	200/ 350
PT cabinet	420/600 (depending on PT capacity)	750	1600	200/350

Features

1

Modular design - including load switch unit (R), load switch + fuse combination electrical unit (T), circuit breaker unit (L), metering cabinet unit (M), busbar PT unit (PT), etc. Different modules can Any combination can form a ring main unit.

2

Fully insulated and fully sealed design - the primary live part (main busbar) and switch body of the JSR series switchgear are sealed in an air box welded by stainless steel plates. The main circuit is connected to the air box through a casing installed on the air box that meets the DIN47636 standard. The external connection can be connected to the incoming and outgoing cables through fully insulated, fully shielded and fully sealed detachable connectors. The protection level of the air box reaches IP67. The inside of the air box is not affected by the external environment and has short-term flood resistance and anti-condensation functions.

3

New environmentally friendly gas can be used - C4 mixed new environmentally friendly gas can be used, providing users with a green and environmentally friendly choice while maintaining safety, reliability and the same size. The GWP (Global Warming Potential) of C4 mixed gas is only 1/11 compared to SF6 gas. The decrease is more than 90%. Users can choose a more suitable gas according to their preference: C4 mixed gas or SF6, or the products delivered at the moment can be filled with SF6. , but it is completely manufactured and tested according to the C4 mixed gas filling, and can be seamlessly upgraded in the future.

4

High safety and reliability - the primary live part and the switch body are sealed in a stainless steel gas box and connected to the outside through a casing to avoid direct contact with the live body; the equipment has a reliable pressure release device and pressure relief channel to ensure that failures occur safety of personal equipment. It has a complete mechanical interlocking device. Misoperation can be prevented to the greatest extent.

Product usage environment

Altitude: ≤4000m (please specify when the equipment operates above an altitude of 1000m so that the inflation pressure can be adjusted during manufacturing Adjustment)

Ambient temperature: Maximum temperature: +55℃

Minimum temperature: -40℃

The average temperature within 24 hours does not exceed 35℃

Ambient humidity:The average relative humidity for 24 hours does not exceed 95%

The average monthly relative humidity does not exceed 90%

Installation environment: There are no explosive and corrosive gases in the surrounding air, and there is no severe vibration or impact in the installation site. The pollution level does not exceed Level III in GB/T5582

Note: When the above usage environment conditions are exceeded, please contact us