Meidensha Corporation
Meidensha SF6 Gas Insulation Tank Type Vacuum Circuit Breaker

Manufacturer: Meidensha Corporation
Model: SF6 Gas Insulation
Features
Superior Breaking Performance: Uses a vacuum interrupter (VI) to eliminate gas decomposition during interruption.
Compact Footprint: Integrates a built-in bushing current transformer (BCT) directly into the tank to save space.
Zero Internal Inspections: Eliminates the need to open the breaking part for maintenance, heavily cutting labor costs.
40% LCC Reduction: Delivers an approximate 40% lifecycle cost (LCC) reduction compared to conventional Gas Circuit Breakers (GCBs).
Eco-Friendly Design: Slashes required $\text{SF}_6$ gas volume by roughly 1/3 compared to a standard GCB.
Seismic Resilience: Engineered with a low center of gravity for excellent anti-seismic performance.
Applications and Solutions
120/168/204 kV JEC-2300 Standard-compliant
Specifications
| Type | VBO-100532B | VBO-100732B | VBO-140532B | VBO-140740B | VBO-170532B | VBO-170740B |
|---|---|---|---|---|---|---|
| Rated voltage (kV) | 120 | 168 | 204 | |||
| Rated current (A) | 1200 | 2000 | 1200 | 2000 | 1200 | 2000 |
| Rated breaking current (kA) | 31.5 | 31.5 | 40 | 31.5 | 40 | |
| Rated opening time (s) | 0.06 (5 cycles) | 0.037 | ||||
| Rated interrupting time (cycles) | 5/3 | 3 | ||||
| Operating duty | A (O – 1 min – CO – 3 min – CO), B (CO – 15 sec – CO), R (O – 0.35 sec – CO – 1 min – CO) | |||||
| Closing time (s) | 0.13 | |||||
| Rated closure operating voltage (V) | DC100 | |||||
| Rated motor voltage (V) | DC100 | |||||
| Insulation medium | SF6 gas | |||||
| Rated gas pressure (MPa-g) | 0.15 (20°C) | |||||
| Operation system | Motor-charged spring | |||||
| Applicable standards | JEC-2300 (1998) | |||||
BCT application
| Secondary current (A) | 5 | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 100 | 40 | 25 | 15 | |||||||||||||
| 20 | 10 | 20 | 10 | 20 | 10 | 20 | 10 | |||||||||
| Primary current (A) | 1P | 3P | 1P | 3P | 1P | 3P | 1P | 3P | 1P | 3P | 1P | 3P | 1P | 3P | 1P | 3P |
| 2000 | ||||||||||||||||
| 1600 | ||||||||||||||||
| 1200 | ||||||||||||||||
| 1000 | ||||||||||||||||
| 800 | ||||||||||||||||
| 600 | ||||||||||||||||
| 400 | ||||||||||||||||
| 300 | X | X | Special | Special | ||||||||||||
| 200 | X | X | X | X | ||||||||||||
| 150 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X |
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