Unwavering in our dedication to customers and delivering cutting-edge innovations,Bepto stands as your steadfast ally on the journey ahead.
12kV Indoor Vacuum Circuit Breaker: MV VCB 1250A high voltage, solid-sealed poles, E2/M2 life, frequent operation, various loads switching, 31.5kA breaking, 10000 cycles, impact/dust/condensation protection, -15°C to +40°C.
Advanced 12kV Indoor MV VCB Series: Premium indoor high voltage vacuum circuit breaker designed for indoor switchgear of 12kV power system, suitable as protection and control unit for power grid equipment and industrial/mining enterprise power design, ideal for switching various loads of different nature, frequent operations, multiple interruption of short-circuit current, delivering 630-1250A rated current, 20-31.5kA short-circuit breaking, 50-80kA short-circuit closing (peak), 10000 mechanical life cycles (M2 level), 50 rated short-circuit breaking/closing times, adopts new type circuit breaker operating mechanism, primary part uses solid-sealed poles of international brands, vacuum interrupter and main conductive circuit parts solid-sealed into whole, E2 electrical life.
Solid-Sealed Poles and Frequent Operation Ready: 12kV Indoor MV VCB incorporates solid-sealed poles technology protecting interrupter from impact, dust and condensation effects, strong environmental adaptability greatly reducing operation and maintenance costs, operating mechanism integrated with circuit breaker body verified by type tests, E2 electrical life and M2 mechanical life ensuring long-term reliability, operating at -15°C to +40°C, altitude ≤1000m, providing reliable vacuum circuit breaking solution for power grid equipment, industrial/mining enterprises, frequent operations, various loads switching, multiple short-circuit interruptions.
| A | B | C |
| 210 | 550 | 901 |
| 230 | 600 | 941 |
| 275 | 650 | 1031 |
| 12kV Indoor Vacuum Circuit Breaker Specifications | 12kV MV VCB (20/25kA) | 12kV MV VCB (31.5kA) | Unit |
| Brand | Bepto Insulation Systems | – | |
| Model Number | 12kV Indoor MV VCB (Vacuum Circuit Breaker) | – | |
| Product Type | Indoor High Voltage Vacuum Circuit Breaker (MV VCB) with Solid-Sealed Poles for Frequent Operation and Various Loads Switching | – | |
| Core Technology | New Type Circuit Breaker Operating Mechanism + Solid-Sealed Poles (International Brands) + Vacuum Interrupter and Main Conductive Circuit Parts Solid-Sealed into Whole + Impact/Dust/Condensation Protection + Integrated Design + E2 Electrical Life + M2 Mechanical Life | – | |
| Rated Voltage | 12 | kV | |
| Maximum Working Voltage | 12 | kV | |
| Rated Current | 630, 1250 | A | |
| Rated Short-Circuit Breaking Current | 20/25 | 31.5 | kA |
| Rated Short-Circuit Closing Current (Peak) | 50/63 | 80 | kA |
| Rated Withstand Current (Peak) | 50/63 | 80 | kA |
| 4s Rated Short-Time Withstand Current | 20/25 | 31.5 | kA |
| Rated Insulation Level – Industrial Frequency Withstand Voltage | 42/48 | kV | |
| Rated Insulation Level – Lightning Impulse Withstand Voltage | 75/85 | kV | |
| Rated Operation Sequence | O-0.3s-CO-180s-CO | – | |
| Mechanical Life (M2 Level) | 10000 | cycles | |
| Electrical Life (E2 Level) | Yes (E2 Level Electrical Life) | – | |
| Rated Short-Circuit Breaking/Closing Times | 50 | times | |
| Operating Mechanism Rated Voltage | AC/DC 110, 220 | V | |
| Switching Distance of Contact | >11 | mm | |
| Overtravel (Contact Spring Compression Length) | 4±0.5 | mm | |
| Three-Phase Breaking/Closing Asynchronism | <2 | ms | |
| Contact Closing Bounce Time | <2 | ms | |
| Average Breaking Speed | 0.9-1.7 | m/s | |
| Average Closing Speed | 0.6-1.0 | m/s | |
| Breaking Time (Highest Operating Voltage) | <0.05 | s | |
| Breaking Time (Lowest Operating Voltage) | <0.08 | s | |
| Closing Time | <0.1 | s | |
| Main Circuit Resistance | <45 | μΩ | |
| Allowance Accumulated Wear Thickness of Contact | 3 | mm | |
| Ambient Temperature (Maximum) | +40 | °C | |
| Ambient Temperature (Minimum) | -15 | °C | |
| Relative Humidity (Daily Average) | ≤95 | % | |
| Relative Humidity (Monthly Average) | ≤90 | % | |
| Vapor Pressure (Daily Average) | ≤22×10⁻³ | MPa | |
| Vapor Pressure (Monthly Average) | ≤1.8×10⁻³ | MPa | |
| Altitude | ≤1000 | m | |
| Earthquake Intensity | ≤8 degrees | – | |
| Environmental Conditions | No Significant Pollution by Dust, Smoke, Corrosive/Flammable Gas, Steam, Salt Spray | – | |
| Solid-Sealed Poles (International Brands) | Yes (Vacuum Interrupter + Main Conductive Circuit Parts Solid-Sealed into Whole) | – | |
| Impact/Dust/Condensation Protection | Yes (Protects Interrupter from Impact, Dust and Condensation Effects) | – | |
| Strong Environmental Adaptability | Yes (Greatly Reduces Operation and Maintenance Costs) | – | |
| Integrated Design | Yes (Operating Mechanism Integrated with Circuit Breaker Body, Type Test Verified) | – | |
| E2 Electrical Life | Yes (E2 Level Electrical Life for Long-Term Reliability) | – | |
| M2 Mechanical Life | Yes (M2 Level Mechanical Life, 10000 Cycles) | – | |
| New Type Operating Mechanism | Yes (Adopts New Type Circuit Breaker Operating Mechanism) | – | |
| Key Advantages | Solid-Sealed Poles, E2/M2 Life, Frequent Operation, Various Loads Switching, Multiple Interruption, Impact/Dust/Condensation Protection, Integrated Design, Strong Environmental Adaptability, 10000 Cycles, 31.5kA Breaking | – | |
| Primary Applications | Indoor Switchgear of 12kV Power System, Protection and Control Unit for Power Grid Equipment, Industrial and Mining Enterprise Power Design, Switching Various Loads of Different Nature, Frequent Operations, Multiple Interruption of Short-Circuit Current | – | |
Bepto is a leading Chinese company in electrical insulation, focused on developing advanced solutions for future power systems. We support transmission and distribution safety and growth, with long-term partners including State Grid, ABB, Schneider, Siemens, and GE. Our services reach clients in over 22 countries.
Bepto focuses on the global market and provides our clients with products suitable for the local market:
Unwavering in our dedication to customers and delivering cutting-edge innovations,Bepto stands as your steadfast ally on the journey ahead.
