VIB-24kv Indoor Vacuum Circuit Breaker with Embedded Poles and Modular Mechanism

Product Description

24kv Indoor Vacuum Circuit Breaker with Embedded Poles and Modular Mechanism

General Description
VIB-24 series of Indoor High Voltage Vacuum Circuit Breaker with embedded poles is three phase A.C.50Hz indoor power distribution equipment  with the rated voltage of 24kV.  It's used for protecting and controlling the electrical equipment in the fileds of industry & mining enterprise,
power plants and substation.  

The main conductive circuit of this type vacuum circuit breaker with spring mechanism is embedded pole, that can greatly improve the
reliability of insulation, mechanical and breaking performance and really realize the free-maintance and longer mechanical & electrical life.

This type Vacuum Circuit Breaker conforms to national standards and the stipulation of IEC standard.
The capability reaches grade of M2-E2-C2.
The products is used for many kinds of switchgear like KYN28-24(GZS1)and can be fixed installation.

Applying ambient conditions
1.Ambient temperature:-10ºC~+40ºC.
2.Ambient humidity:the average value of a day should be no more than 95%;the average value of a month should be no more than 90%.
3.Earthquake intensity:not exceed 8 degrees.
4.Water vapour pressure:the average value of a day should be no more than 2.2kPa;the average value of a month should be no more than 1.8kPa.
5.The height above sea level:≤1000m(besides the special requirements).
6.It should be installed in the place without fire,explosion,serious filth,chemical erosion and vibration.

Main technical specification

S.N	Name		Unit	Data
1	Rated voltage		kV	24
2	Rated insulation level	Rated power frequency withstand voltage 1min	kV	65
		Rated lightning impulse withstand voltage	kV	125
3	Rated current		A	630	1250	1600	2000	2500	3150
4	Rated frequency		Hz	50
5	Rated short breaking current Rated short time withstand current		kA	20		25		31.5
6	Rated short circuit making current(peak) Rated peak withstand current		kA	50		63		80
7	Rated short-circuit duration		s	4
8	Clearance between open contacts		mm	13±1
9	Overtravel		mm	3.5±0.5
10	Contact bouncing duration at closing opening		ms	≤2/≤3(2000-31.5 and above)
11	Out of simultaneity of CO operation of three poles		ms	≤2
12	Opening time		ms	20~50
13	Closing time		ms	30~70
14	Average opening speed		m/s	1.1~1.6
15	Average closing speed		m/s	0.5~1.0
16	Rated operating sequence			O-0.3s-CO-180s-CO

Overall outline drawing




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