Full Gas Insulated Intelligent Ring Main Unit
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JG(FJ)-12/D630 Distribution Firewall
Full Gas Insulated Intelligent Ring Main Unit
External insulation and internal insulation Vacuum insulation is adopted for internal insulation. As for external insulation, pollution-resistant outdoor epoxy resin, silicon rubber or ceramic shell with anti-aging performance and good resistance to corrosion is used for external insulation. All live parts in the outdoor box type vacuum circuit breaker are sealed in the SF6 gas chamber.

Insulation system: 

External insulation and internal insulation Vacuum insulation is adopted for internal insulation. As for external insulation, pollution-resistant outdoor epoxy resin, silicon rubber or ceramic shell with anti-aging performance and good resistance to corrosion is used for external insulation. All live parts in the outdoor box type vacuum circuit breaker are sealed in the SF6 gas chamber. Vacuum extinction is adopted and zero gauge pressure SF6 gas is used for supplementary insulation. The equipment can offer maintenance-free operation for 15 years and is explosion-proof.


S/N

Item

Unit

Parameter

1

Switch cabinet

2

Item


Circuit-breaker

load switch

3

Rated voltage

kV

12

4

Power frequency withstand voltage

kV

42/48

5

Lightning impulse withstand voltage

kV

75/85

6

Rated current

A

630

7

Rated short-time withstand current

kA/4s

20

20

8

Rated short-circuit open current 

kA

20

-----

9

Closing voltage

V

AC220

DC24

10

Opening voltage

V

DC48

DC24

11

Mechanical life

Times

10000

12

SF6 gas gauge pressure (at 20℃)

Mpa

0.04

13

Partition controller

14

Model


FDR

15

Working power supply voltage/frequency

 

AC220V/50Hz

16

Setting value of phase-to-phase short circuit protection current

A

1-5  5-section switch (software adjustable under specific conditions)

17

Setting value of zero-sequence current for ground protection


20mA-60A 12-section switch (software adjustable under specific conditions)

18

Setting value of ground protection action time

s

0-60 12-section switch (software adjustable under specific conditions)

19

Permissible error for operation value


±5%

1. Intelligent detection of faults: detect a fault occurred inside or outside the boundary for subsequent action.


2. The device supports dual AC power supply mode and uses battery (super-capacitor) as backup power source for power supply. Normally, the device is powered by AC power supply and PT power supply is also supported. When AC power source is cut off, the device should switch to another AC power source or backup power source for power supply without disturbance. When AC power source restores power supply, the device should automatically switch to AC power source for power supply.


3. Intelligent power source management function: battery activation management function is provided to realize battery charge and discharge in an automatic, manual at site and remote control manner and the interval of battery charge and discharge can be set.


4. Prepaid electric energy meter function: intelligent management of power metering and prepaid power service is realized after a prepaid electric energy meter is installed.


5. Support power data collection and monitoring system, energy management system, substation automation system, converter station computer monitoring system, power plant computer monitoring system, distribution automation system, microcomputer relay protection and automatic safety device, wide-areas phase measurement system(wams), load control system, water power scheduling automation system and hydropower cascade dispatching automation system, electric energy metering and billing system, supplementary controlled system for real-time power market, etc.