RGA-12 Indoor Environment-Friendly Gas-Insulated Metal-Enclosed Switchgear (C-GIS)

Performance Overview

Meeting relevant Chinese standards GB3906, GB/T11022, DL/T593 and DL/T404, etc. and international standards IEC62271-200 and IEC62271-100, etc.;

Environment-friendly: Non-polluting pure N2 gas is used;

Compact structure: With the typical cabinet width of not more than 500mm, the 12kV switchgear has small cabinet size and footprint;

The switchgear is metal-armored and gas-sealed, and the high-voltage components are waterproof and dustproof with the ingress protection rating of IP67, so that they are not affected by the environment, and are completely maintenance-free;

The spring operating mechanism is adopted for the circuit breaker, and the vacuum interrupter for solid-sealed pole is used so that parts and components are greatly reduced;

The direct-acting three-position switch has manual and electric operation functions;

With modular gas tank structure, an appropriate combination scheme can be selected according to needs to ensure reliable and economic operation of the switchgear;

The intelligent control and protection units are adopted, and control, protection, measurement and communication functions are possessed, fully realizing the requirements of distribution network automation;

The reliable mechanical & electrical interlock design scheme can effectively prevent misoperation;

The bus connector is used between switchgear cabinets to achieve easy installation and flexible expansion, and no gas system processing is involved;

Manufacturing technology: Laser welding, laser cutting and helium leakage detection ensure safe operation of the equipment;

Technology: The new layout, insulation optimization design and comprehensive electric field optimization design make the field strength uniform and component distribution reasonable, and the components to reduce the electric field are used; serious consideration is given to design, materials and manufacturing processes, and rigorous theoretical demonstration and detailed physical experiments are conducted; performance indexes such as volume, structure, maintenance, safety and environmental adaptability are comprehensively considered so as to optimize the product design;

Product Features

Environment-friendly

Six gases such as SF6 gas have been listed as emission-limiting gases under the Kyoto Protocol.

According to expert research, the greenhouse effect of SF6 gas is 23,900 times that of CO2 gas, and its life can be up to 3,200 years after being discharged into the atmosphere. However, due to its excellent electrical arc extinguishing and insulating properties, SF6 is still widely used in medium- and high-voltage power equipment.

The RGA-12 gas-insulated switchgear is insulated with pure nitrogen, truly realizing the environmental protection requirement.
Withdrawable intermediate cabinets

For on-site replacement of the installed switchgear cabinets, the individual cabinet can be withdrawn directly without moving the installed cabinets on both sides.
Fully modular design

With higher cost performance, the vacuum circuit breaker and three-position switch can be installed into the gas tank after commissioning is completed.

Main Technical Parameters

Technical parameter table of switchgear

No.	Name		Parameter		Unit
1	Rated voltage		12		kV
2	Power frequency withstanding voltage (phase-to-phase & phase-to-earth/fracture)		42/48		kV
3	Lightning impulse withstanding voltage (phase-to-phase & phase-to-earth/fracture)		75/85		kV
4	Partial discharge (whole cabinet/components)		≤10/≤3		pC
5	Rated frequency		50		Hz
6	Rated current of main bus		1250		A
7	Rated current of branch bus		1250		A
8	Rated current of branch bus		25	31.5	kA
9	Rated short-circuit making current (peak)		63	80	kA
10	Rated short-time withstanding current/duration		25/4	31.5/4	kA/s
11	Rated peak withstanding current		63	80	kA
12	Single/back-to-back capacitor bank switching current		630/400		A
13	Single/back-to-back capacitor bank switching current		5		次
14	Rated operation sequence		O-0.3s-CO-180s-CO
15	Rated filling pressure		0.13		MPa
16	Alarm pressure		0.11		MPa
17	Min. functional pressure		0.1		MPa
18	Annual gas leakage rate		≤0.05		%/Y
19	Ingress protection rating	Gas tank	IP67		/
		Cabinet	IP41		/
20	Rated voltage of auxiliary circuit		DC110,DC220或AC110，AC220		V
21	Power frequency withstanding voltage (1min) of auxiliary circuit		2		kV
22	Weight		600~800		kg
23	Overall dimensions (W×D×H)		500×1210×2250		mm

Note: Insulation, breaking and making are permitted under the condition of zero gauge pressure.

Technical Parameter List of Vacuum Circuit Breaker

No	Name		Unit	Parameter
1	Rated voltage		kV	12
2	Operating environment of circuit breaker	Insulating gas		N2
3		Rated operating pressure (absolute), 20℃	MPa	0.13
4	Rated insulation level (in gas)	Power frequency withstanding voltage (1min) (phase-to-phase & phase-to-earth/fracture)	kV	42/48
		Lightning impulse withstanding voltage (peak) (phase-to-phase & phase-to-earth/fracture)	kV	75/85
5	Rated frequency		Hz	50
6	Rated current		A	1250
7	Temperature rise test		A	1.1*1250A
8	Rated short-circuit breaking current		kA	25	31.5
9	Rated short-time withstanding current/duration		kA/s	25/4	31.5/4
10	Rated short-circuit making current (peak)		kA	63	80
11	Rated peak withstanding current		kA	63	80
12	Loss of service continuity category			LSC2
13	Closing bounce time		ms	≤2
14	Opening non-synchronism		ms	≤2
15	Closing non- synchronism		ms	≤2
16	Closing speed (6~0mm)		m/s	0.7±0.2
17	Opening speed (0~6mm)		m/s	1.1±0.2
18	Closing time		ms	30~70
19	Opening time		ms	20~50
20	Rated operation sequence			O-0.3s-CO-180s-CO
21	Mechanical life		Mechanical life	M2
22	Electrical life		Mechanical life	E1
23	Single/back-to-back capacitor bank switching current		A	630/400
24	Rated voltage of auxiliary circuit		V	DC110,DC220 or AC110，AC220
25	Power frequency withstanding voltage (1min) of auxiliary circuit		kV	2
26	Rated power of energy storage motor		W	90
27	Rated power of closing coil		VA	196
28	Rated power of opening coil		VA	196