SCHVB-12/T系列户内真空断路器是三相交流50Hz，额定电压为12kV的户内开关设备，可供工矿企业、发电厂及变电站、电气设施的控制和保护之用，并适合于频繁操作的场所。采用VET操动机构与断路器本体一体化，设计即可做为固定安装单元，也可配用专用推进机构，组成手车单元使用。
主要技术参数
| 序号 | 项目 Item | 单位 | 参数 Parameters | |||
| 1 | 额定电压 Rated voltage | kV | 12 | |||
| 2 | 额定绝缘水平 Rated insulation level | 额定雷电冲击耐受电压峰值 Rated Lightning Impulse voltage tolerance | kV | 75 | ||
| 1 min工频耐压 1min Frequency voltage | 42 | |||||
| 3 | 额定短路开断电流 Rated short-circuit breaking current | kA | 20/25 | 31.5 | 40 | |
| 4 | 额定电流 Rated current | A | 630 1250 | 630 1250 1600 2000 2500 3150 | 1250 1600 2000 2500 3150 4000 | |
| 5 | 额定热稳定电流 (有效值 )Rated thermal stability of current (RMS) | kA | 20/25 | 31.5 | 40 | |
| 6 | 额定动稳定电流 (峰值 )Dynamic Stability rated current (peak) | 50/63 | 80 | 100 | ||
| 7 | 额定短路关合电流 (峰值 )Rated short-circuit closing current (peak) | 50/63 | 80 | 100 | ||
| 8 | 额定短路开断电流开断次数 Rated short-circuit breaking current breaking number | 次 Times | 50 | |||
| 9 | 二次回路工频耐受电压 (1min)Frequency tolerance of the secondary circuit voltage (1min) | V | 2000 | |||
| 10 | 额定操作顺序 Rated operating sequence | O-0.3s-CO-180s-CO | ||||
| O-180s-CO180sCO | ||||||
| 11 | 额定热稳定时间 Rated thermal stabilization time | S | ||||
| 12 | 额定单个 /背对背电容器组开断电流 Rated a single / back-to-back electric current breaking device group | A | 630/400 800/400(40kA) | |||
| 13 | 机械寿命 Mechanical life | 次 Times | 10000 | |||
