Solid Insulated Ring Main Unit
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JGSIS-12 Series Solid Insulated Switchgear
Solid Insulated Ring Main Unit
Solid Insulated Switchgear is a switchgear which uses solid insulated materials as main insulating medium. Connect the vacuum arc-extinguishing chamber with its electric conduction, disconnector, grounding switches, main bus, branch main bus and other dominant electric circuits.

Solid Insulated Switchgear is a switchgear which uses solid insulated materials as main insulating medium. Connect the vacuum arc-extinguishing chamber with its electric conduction, disconnector, grounding switches, main bus, branch main bus and other dominant electric circuits. After single or combination, cover it with insulated solid medium as one or multiple functional, recombinational or reextensible models with full insulation or full airtightness. The touchable model surface is coated with a conductive or semi-conductive shielding layer which can be directly and solidly grounded to the ring main unit.


JGSIS-12 Series Solid Insulated Switchgear is independently developed by Jinguan Electric. Featuring modular design, this switchgear is small in size, maintenance-free, easy to operate, safe and reliable and environmental-friendly and can meet the demand of different power supply plans to the maximum degree. The switchgear can be installed indoor or directly installed outdoor in a box.

S/N

Item

Unit

Product Category

1



load switch

Vacuum circuit breaker

Composite apparatus

2

Rated voltage

kV

12

3

Arc extinction type


Vacuum

4

Rated current

A

630

630/1250

125

5

Rated frequency 

Hz

50

6

1-min power frequency withstand voltage

Phase to phase

Fracture

kV

42/48

7

Lightning impulse withstand voltage

Phase to phase

Fracture

kV

75/85

8

Rated short-circuit open current 

kA


20/25

31.5

9

Rated short-circuit closing current 

kA

50

50/63


10

Rated duration of short-circuit

s

4

4


11

Rated short-time withstand current

Dynamic stability

kA

20

20/25


12

Rated peak withstand current

Thermal stability

kA

50

50/63


13

Rated cable-charging breaking current

A

10

10


14

Rated take-over current

A



3150

15

Partial discharge

pc

≤20

≤20

≤20

16

Enclosure protection class

IP

IP4X

17

Mechanical life

Time

10000

18

External dimension: (width * depth * height)

mm

450*905*1500

1. Eliminate the use of SF6 gas, thus reducing the emission of greenhouse gases and leakage of hazardous gases generated by SF6 gas decomposition and realizing truly safe, enthronement-friendly, innocuous and harmless application.


2. Avoid pressure gas tank design, eliminating the possibility of hazardous accidents caused by degrading insulating ability due to SF6 gas leakage.


3. Air insulation mode is adopted which will not give rise to air leakage and insulating ability degradation.


4. Live parts are sealed with epoxy to form a fully insulated and sealed structure of high IP grade.


5. Simple and reliable operating mechanism greatly improves the security.


6. Intensified phase-to-phase isolation and split-phase insulation design may prevent phase-to-phase faults.


7. Upper isolation design can realize ground closing and opening through the arc extinction chamber, which is in line with the grid safety design.  


8. The modular structure contributes to loop expansion, unit exchange and plan alteration.


9. Three phases at the isolation switched fracture are independent and clear and the contact sites are directly visible and LED lighting is provided.


10. Complete mechanical interlock function, fully meeting interlocking protection requirements. Ensure operational safety.


11. Coated with semi-conductive shielding layer and reliably grounded, the module is touchable with higher security.


12. The bus cable adopts special flexible shielded cable, avoiding stress generated due to improper installation, thus improving the operational reliability.


13. The cabinet structure is reasonably designed and a bushing transformer is used. This significantly lower the level of difficulty for the installation of dual-cable inlet and outlet.