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Side mounting type indoor High Voltage Vacuum Circuit Breaker
VTZ/R-24
1、General Description
VTZ/R-24 Side mounting Indoor High Voltage Vacuum Circuit Breaker is widely used for 3phase AC 50(60)HZ and 3.6-24KV indoor device,which is used for protecting and controlling electrical equipment in fields of industry&mining enterprise. power plants and substation.
2.Applying conditions:
Ambient temperature;-10℃----+40℃
Relative humidity:daily average ≤95%,monthly average ≤90%
Seismic intensity ：≤8
Saturated vapor pressure：daily average ≤2.2kPa，monthly average≤1.8kPa；
Altitude：≤1000m；（Not including special requirement）
Service environment：should be avoided fire, explosion risk, serious pollution, chemical corrosion and violent vibration
3.Structural characteristics:
1.Adopt module operating mechanism,integrated stored energy hand shank and reasonable whole structure.
2. Use module design to easy dis-assemble and replace broken parts. ；
3.Adopt Solid-closure technology in primary circuit to improve insulation and achieve free maintenance.
4.Long life,The circuit breaker meet M2 &E2.
5.Own excellent breaking property to make and break inductance and capacitance.
6.suitable for KYN-28and XGN-12 and replace VD4-12 and HVX-12.
7.Flexible main circuit connection way to meet different requirement of switchgear .
4.Technical specification
No. | Item | Unit | Data | |
1 | Rated voltage | kV | 24 | |
2 | Rated power frequency withstand voltage/1min | 65 | ||
3 | Rated lighting impulse withstand voltage | 125 | ||
4 | Rated frequency | Hz | 50/60 | |
5 | Rated current | A | 630 | 1250 |
6 | Rated short circuit breaking current | kA | 20 | |
25 | 25 | |||
31.5 | 31.5 | |||
7 | Rated withstand current(peak) | kA | 50 | |
63 | 63 | |||
80 | 80 | |||
8 | Circuit resistance of each phase | μΩ | ≤50 | ≤45 |
5.Mechanical property
No. | Item | Unit | Data |
1 | Clearance between open contacts | mm | 12 ± 1 |
2 | Over-travel | 3.5 ± 0.5 | |
3 | Bounce time of contact closed | ms | ≤ 2 |
4 | Non simultaneity of 3 phase contact opened&closed | ≤ 2 | |
5 | Opening time | 20～50 | |
6 | Closing time | 30～70 | |
7 | Average opening speed | m/s | 1.1～1.6 |
8 | Average closing speed | 0.5～1.0 |
6.overall drawing
7.Secondary connection diagram
Circuit breaker series 
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