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Vsg1-12 Vacuum Circuit Breaker, Indoor Type

Product Description

VSG1-12 Vacuum circuit breaker, Indoor type
1.1 Ratings:rated voltage 12KV, rated current 630A~1250A, AC50HZ
1.2 Application: for the control and protection of substation and equipments; making and breaking short-circuit current under various operating status of electric network.
1.3 Standard: IEC62271-100
2. Type and Interpretation
3. Working condition
3.1 Ambient air temperature: -25~40ºC
3.2 Altitude:≤2000m
3.3 No operating in such as subject to dust, dirt, smog, corrosive/flammable gas, vapor and salt pollution.
3.4 Humidity: Daily average value ≤95%
                      Monthly average value ≤90%
3.5 Water vapor pressure: Daily average value ≤2.2Kpa
3.6 The external shocking and earthquake could be neglected.
3.7 The amplitude of electromagnetic interference in the secondary system ≤1.6KV
Note: Customized products are available on your requirements.
4.Main technical parameter
Rated voltageKV12
Rated              1min power frequency withstand voltage(vacuum open contacts)
insulation         Lightening impulse withstand voltage(vacuum open contacts)
Rated frequencyHZ50
Rated currentA630,1250
Rated short-time withstan currentKA16,20,25, 31.5
Rated withstand current(peak)KA40,50,63
Rated short-circuit breaking currentKA16,20,25
Rated short-circuit making currentKA40,50,63
Rated duration of short-circuitS4
Rated operating sequence O-0.3S-CO-180S-CO
Mechanical life M2 class(30000times)
Rated voltage of operating power AC 220/DC 220
Full breaking time ≤70
Electrical life E2 class
5.Overall and Installation Dimension
5.1 overall and installation dimension of fixed type circuit breaker

Vsg1-12 Vacuum Circuit Breaker, Indoor Type

Alternative parameters table1
Rated voltageRated currentRated short-circuitPABD
KVKAbreaking current, KAmmmmmmmm
Alternative parameters table2                           
Rated voltageRated currentRated short-circuitPABCDW
KVKABreaking current, kAmmmmmmmmmmmm
 63020,25     35
Series NumberSymbolNameRemark
1YQ-Y9Indirect over-current releaseChosen  element
2Y1-Y4Rectifier element 
3KOInner mechanism anti-jumping relay 
4PHandle operation mechanism 
5Y1blocking eletromagnetChosen element
6HQClosing release 
7TQBreaking release 
8MEnergy storing engine 
9S9assistant switch used at operation position 
10S8assistant switch used, at test positinChosen element
11S2Blocking electromagnet assistant switch 
12S1Inching switch for energy storing 
13QFassistant switch of breaker contact 


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