Vib3 12kv 1250A Fixed Type Hv Vacuum Circuit Breaker Vcb Vacuum Switch

Product Description

VIB3 12KV 1250A Fixed Type HV Vacuum Circuit Breaker VCB Vacuum Switch

General Description
VIB3-12 series of indoor high voltage vacuum circuit breaker is applied to three phase,A.C 50(60)Hz,3.6~24kV electric system.It's used for mining and industrial enterprise,power plant,substation to switching and dividing load current,overcurrent,fault current, also applied for place with frequent operation.This series widely used for power station,power system,petrochemical,smelting,subway,airport,buildings project.

Applying ambient conditions and width of matched switchgear
Ambient temperature:max +40ºC,average temperature within 24h should less than 30ºC,min temperature -15ºC
The height above sea leval:≤1000m,can meet 4500m(need evaluate)
Relative humidity:daily average relative humidity≤95%,monthly average relative humidity≤90%
Saturated vapour pressure:daily average value≤2.2kPa,monthly average value≤1.8kPa
ambient air:without obvious dust,smog,corrosive or flammable gas,steam and salt mist pollution
Width of matched switchgear room:650mm,800mm,1000mm

Technical specification

Name	Unit	Date
rated voltage	kV	12
rated power frequency withstand voltage	kV	42
rated lighting impulse withstand voltage	kV	75
rated frequency	Hz	50
rated current	A	630	1250	1600	2000	2500	3150
rated short circuit breaking current	kA	20	20
		25	25	25
		31.5	31.5	31.5	31.5	31.5	31.5
			40	40	40	40	40

rated peak withstand current	kA	50	50
		63	63	63
		80	80	80	80	80	80
			100	100	100	100	100

conductive circuit resistance of each phase	μΩ	≤50	≤45		≤35	≤25

Mechanical characteristic parameter

S.N.	Name	Unit	Data
1	distance between open contacts	mm	9±1
2	overtravel	mm	3.5±0.5
3	contact bouncing duration at closing operation	ms	≤2(1600A Max) ≤3(2000A Min)
4	out of simultaneity of CO operation of three ploes	ms	≤2
5	opening time	ms	20~50
6	closing time	ms	35~70
7	average opening speed	m/s	0.9~1.3
8	average closing speed	m/s	0.4~0.8