10kv Vacuum Circuit Breaker

• Breaking Capacity: High Voltage Circuit Breakers
• Operation: Energy-storage Type
• Speed: Normal Type Circuit Breaker
• Arc-extinguishing Medium: Vacuum
• Installation: Fixed
• Structure: Vcb
• Poles Number: 1
• Type: Circuit Breaker
• Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection, OVP(Overvoltage Protection)
• Certification: ISO9001-2000

Product Description

VHE-12 indoor high voltage vacuum circuit breaker (Insulating cylinder structure)
              
Overview

VHE-12 vacuum circuit breaker with 12KV rated voltage,Indoor distribution device of three-phase ac 50HZ, Is a new product that developed by our company independently.  We have the intellectual property rights, The product can be compatible with the VS1.VD4 and so on.  Available for industrial and mining enterprises,Power plant and substation in electric equipment protection and control,Especially suitable for the fields of free oil, less maintenance and frequent operation.  It can be configured in the centrally installed switchgear,Double switchgear,Fixed switchdaer for control and protection of the high voltage electrical equipment.  It meets the standard of GB1984-2003, DL/T403-1999, IEC56, 694 publication.  The main characteristics of the product are:

• Circuit breaker operating mechanism and circuit breaker ontology integration design,The overall layout is reasonable, beautiful and concise;
• Circuit breaker can defense all kinds of environmental impact because of its used vertical insulation sleeve,Therefore circuit breaker can be applied to all kinds of special environmental conditions;
• Fixed and handcart types can satisfy different equipped requirements for cabinet and circuit breaker;

  Few maintenance,Usually the operating mechanism only need doing a bit of cleaning or lubrication.


The normal conditions

1. Ambient temperature: max +40°C min -15ºC(conveyance under -30ºC is allowed);
2. Altitude: ≤1000m;
3. Relative humidity: daily average relative humidity: ≤95%; monthly average relative humidity:≤90%; daily average saturated vapor pressure: ≤2.2*10^-3 MPa; monthly average value :≤1.8*10^-3 MPa;
4. Earthquake intensity: ≤8 degree;
5. The installation site should be no explosion,severe vibration, chemical corrosion and serious pollution.

Main Technical Data

No.	Item		Unit	Value
1	Rated voltage		KV	12
2	Rated insulation level	Rated lighting impulse withstand voltage (peak)	KV	,75,80
		1min Short-time power frequency withstand voltage(1min)	KV	,42,48
3	Rated short circuit breaking current		KA	20	25	31.5	40
4	Rated current		A	630 1250		630 1250 1600 2000 2500 3150	1250 1600 2000 2500 3150 4000
5	Rated thermo stability current(valid)		KA	20	25	31.5	40
6	Rated dynamic stability current(peak)		KA	50	63	80	100
7	Rated short-circuit making current(peak)		KA	50	63	80	100
8	Rated operations of short-circuit breaking current interruption			50(40KA30)
9	(1min) Power frequency withstand voltage of secondary circuit(1 min)		V	2000
10	Rated operating sequence			-0.3S--180S-/-180S--180S-(40KA) Opening-0.3S-closingopening-180S-closing opening/opening-180S-closing opening-180S-closing opening(40KA)
11	Rated thermo stability time		S	4
12	Rated breaking current(a capacitor/back to back capacitor)		A	630/400   800/400(40KA)
13	Mechanical life			30000

 
Note:When the rated current reached 4000A, You need enforce air cooling.
    Mechanical characteristics of circuit breaker assembly after adjustment

No.	Item	Unit	Value
1	Contact distance	mm	10±1
2	Contact over travel	mm	3.5±0.5
3	Opening speed	m/s	1.0±0.2
4	Closing speed	m/s	0.6±0.2
5	Contact bouncing duration at closing operation	ms	≤2
6	Distance	mm	210±1.5 / 275±1.5
7	Three-pole simultaneity	ms	≤2
8	Conductive circuit resistance  of each phases	μΩ	≤60(630A),≤50(1250A) ≤35(1600-2000A),≤25(2500A)
9	Closing time	ms	35~70
10	Opening time	ms	15~50