Product classification

According to the type of switch, it can be classified into load switch with grounding assembly (referred to as C module), load switch without grounding assembly (referred to as CB module), circuit breaker with grounding assembly (referred to as V module), circuit breaker without grounding assembly (referred to as VB module), circuit breaker interconnection switch (referred to as VZ module), switch-fuse combination switch assembly (referred to as F module), and disconnector assembly (referred to as G module).

Product model description

①	Solid fully insulated closed ring main unit
②	Design No
③	Rated Voltage（kV）
④	Rated Current（A）
⑤	Switch category: C- 负荷开关；V- 断路器；G- 隔离开关； C-load switch; V-circuit breaker; G-disconnector; F- switch-fuse combination switch; CB-load switch without grounding; VB circuit breaker without grounding VZ circuit breaker interconnection switch
⑥	Rated short-time withstand current（20,25kA）
⑦	B: without grounding switch: z: lower direct outgoing line​

Conditions of Use

● Ambient temperature: -45℃~+45℃;
● Relative humidity: maximum average relative humidity, daily average ≤95%, monthly average ≤90%;
● Altitude: ≤4000m;
● Shockproof requirement: 8 degree;
● Protection grade: charged body seal IP67, Fuse cartridge IP67, switch cabinet shell IP4X;
Note: When ordering this product beyond the above conditions, please consult with our company.​

Executive standards
● IEC62271-1-2007 High-voltage switchgear and controlgear-part 1: Common specifications
● IEC620071-200-2003 High-voltage switchgear and controlgear-part 200: AC metal-enclosed switchgear and controlgear for rated voltages above 1kV and up to and including 52kV ;
● GB3906-2006 Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6kV and up to and including 40.5kV;
● GB/T11022-1999 Common specifications for high-voltage switchgear and controlgear standards;
● GB1984-2003 High-voltage alternating-current circuit-breakers        
● GB1985-2004 High Voltage alternating-current disconnectors and earthing switches;  
● GB3804-2004 High-voltage alternating-current switches for rated voltage above 3.6kV and less than 40.5kV;
● DL/T404-2007 Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6kV and up to and including 40.5kV and DL/T5932006 Common specifications for high-voltage switchgear and controlgear standards;
● Q/GDW 30-2012 Specifications for 12kV solid-insulated ring main units.

Technical parameter

Technical parameter of switchgear​

Name			Unit	Parameter
Rated Voltage			kV	12
Rated frequency​			Hz	50
Rated Current			A	630	1250
Rated  insulation  level	Power frequency withstand voltage	Isolating distance	kV	48
		Interphase	kV	42
		Phase to ground	kV	42
	Lightning impulse withstand voltage	Isolating distance	kV	85
		Interphase	kV	75
		Phase to ground	kV	75
Rated short-circuit breaking current (1s)			kV	25	31.5
Rated short-time withstand current（4s）			kV	25	31.5
Rated peak withstand current (1p)			kV	63	80
Rated short-circuit making current (peak) (1ma)			kV	63	80
Enclosure protection grade				IP4X
Operation mode				Spring energy storage type

Technical parameters of isolating earthing switch

No.	Item		Unit	Parameter
1	Rated Voltage		kV	12
2	Rated Current		A	630	1250
3	4S rated short-time withstand current (effective value)		kA	25	31.5
4	Rated peak withstand current (peak value)		kA	63	80
5	1min power frequency withstand voltage	Phase to phase and to ground	kV	42
		Isolating distance		48
6	Rated Lightning impulse 耐受Voltage	Phase to phase and to ground	kV	75
		Isolating distance		85
7	Mechanical life of main switch		times	3000
8	Mechanical life of earthing switch		times	3000

Safety and environmental protection

● Visible isolating distance of isolating knife 
In front of the cabinet, there is a visible window of the isolating distance, which can be used to view the isolation closing position, isolation opening position, grounding closing position, and the three working positions. It is convenient for the on-site staff to repair and determine the location of the isolation knife, which is very safe.
● Internal combustion arc design
Internal arcing pressure valve: when arcing occurs inside the product, the pressure will be released from the pressure relief valve and the arcing will be discharged to the cable trench to avoid accidental injury to the operation.
● Green and environmental protection
It is designed with environment-friendly materials. SF6 gas is not used as the arc extinguishing medium and insulation. It does not pollute the environment. The primary circuit uses the least contact design to ensure low energy consumption during operation.
​​

Outline dimensions

Model	Width （mm）	Depth （mm）	Height （mm）
PT cabinet of load switch (CPT)	500	950	1650
Circuit breaker cabinet (VB)	400	950	1650
Circuit breaker cabinet (V)	400	950	1650
Buscouple cabinet of circuit breaker (VZ)	400	950	1650
Bus lifting cabinet (G)	400	950	1650
Switch-fuse combination cabinet (F)	500	950	1650