MEASURING SYSTEM FOR CONTINUOUS MONITORING A HIGH-TENSION FEED-THROUGH

摘要

The system (1) has a measurement circuit (5) that monitors the high-voltage bushing (2). A connector (3) connects the measuring circuit to a measuring port (4) of the bushing. A protective circuit (10) is provided with a protection stage (11) having a first operating voltage (U1) connected electrically in parallel to a protection stage (12) having a second operating voltage (U2) greater than the first operating voltage (U1). The protection stage (12) is provided between the measuring port and the protection stage (11) provided with a low pass filter (23). The connecting cable (6) is provided to connect the measurement circuit to the connector. A protection circuit is provided for protecting the measuring port against over-voltage.