| 摘要 |
<p>Electronic combined current and voltage measurement device of the capacitor bushing type comprising a sealed assembly formed by an upper insulating casing (11) that supports a head (10) and a flange (7), said sealed unit being completed by a lower insulating casing (12) and by a lower base (13). Contained inside said unit is a metal tube (1) connected to a conductor through which a primary current passes and a capacitor bushing suitably produced to reduce the output voltage to values in line with the power supply of electronic voltage measurement devices. In the invention, the current signal is picked up by Rogowsky coils (14) positioned inside the flange (7) and supplied in Low Voltage from the power supply (15), converted into a digital signal by an electro-optical converter (8) and subsequently sent, by means of optical fibers (9), to electronic measurement and protection devices located in the control room of the power station. The voltage signal is picked up by the capacitive divider derived from the capacitor bushing and converted into digital signal and then into electro-optical signal.</p> |
