Vb4/S-24kv/630A-20ka Lateral Type Vacuum Circuit Breaker

• Customization: Available
• Breaking Capacity: High Voltage Circuit Breakers
• Operation: Electric Type
• Model NO.: VB4/S
• Arc-extinguishing Medium: SF6
• Installation: Fixed
• Structure: MCCB
• Poles Number: 3
• Type: Circuit Breaker
• Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection, OVP(Overvoltage Protection)
• Certification: VDE, ISO9001-2000
• Rated Frequency: 50/60 Hz
• Warranty: 1 Years
• Rated Currrent: 630-4000A
• Transport Package: Wooden
• Trademark: Chenghe
• Origin: Wenzhou China
• Production Capacity: 4000 Sets/Year

Product Description

Product DescriptionGeneral
VB4/S medium-voltage indoor vacuum circuit breaker is applicable for three-phase AC power system of rated voltage up to 7.2kV~24kV and frequency 50/60HZ,widely used in many fields such as power plant, transformer substation, petrol chemical industry, metallurgy, manufacturing industry, airport, residential area, etc., to control and protect the electric equipment, especially, It is used for the occasion that needs infrequent operation at rated current or multi-breaking short circuit current, may be mounted in the indoor air insulating switchgear like type HXGN ring main uint series, etc. This circuit breaker is standards as GB1984-2003 AC high voltage circuit breaker,JB3855 3.6-40.5Kv indoor AC High voltage circuit breaker,DL/T403 Specification of 12-40.5Kv indoor High voltage vacuum circuit breaker for order as well as IEC60694.
This circuit breaker is made with mature APG technology. The application of VB4/S terminal buffer guarantees the indoor terminal is ever more reliable in nay operation environment. VB4/S can fully meet the requirement of GB, DL, IEC, DIN, VDE as well as standards of other advanced industrial countries. 

Service environment
a) Air temperature: Maximum temperature: +40ºC; Minimum temperature:-25ºC
b) Humidity: Monthly average humidity 95%; Daily average humidity 90% .
c) Altitude above sea level: Maximum installation altitude: 2500m
d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
e) No frequent violent shake

Main technical specifications

No	Item		Unit	Parameter
1	Rated voltage		kV	12	17.5/24
2	Rated frequency		Hz	50/60
3	Rated current		A	630/800/1250/1600
4	1min Power frequency withstand voltage	wet	kV	38	50
		dry	kV	48	60
5	Lightning impulse withstand voltage		kV	75	125/150
6	Rated short circuit breaking current (peak)		kA	63/80/100
7	Rated active load and close circuit breaking current		A	63	50
8	Rated short breaking current		kA	20/25/31.5kA
9	Rated short circuit making current (peak)		kA	63/80/100
10	Rated cable(line) charging breaking current		A	50 and 10
11	Cable charge breaking current in earthing fault		A	20	20
12	Rated withstand current (peak)		kA	63/80/100
13	Short time withstand current (4s)		kA	31.5
14	Mechanism life		times	10000

Note: For short circuit breaking current & rated current is optional by clients.