| 摘要 |
An ultrahigh-speed current protection device against short-circuit currents comprises current sensors connected through amplifiers and a high-frequency filter to a switch. As sensors contactless current sensors are used, which are installed at each working phase of a protected cable, each of which is connected to a high frequency filter made from a capacitor, in points of connections thereof series operation amplifiers and detectors are connected, the outputs of detectors are connected to the switch through the operation amplifier. |
