Patent ID: 9673614
Date: 2017-06-06
CPC Classifications: G01R,H02H

Claim:
1. A monitoring device for monitoring a surge arrester connected to a power network, the monitoring device comprising: a grounding line, which is configured to be electrically connected to ground and to the surge arrester so that an electric current flowing through the surge arrester will pass through this grounding line; a measuring unit comprising one or more analog measuring circuits configured to measure the electric current passing through the grounding line and producing measuring signals related to the measured electric current; an electronic processing unit configured to receive said measuring signals from the measuring circuits of the measuring unit and produce monitoring data based on these measuring signals; and a data storage medium configured to store monitoring data produced by the electronic processing unit, wherein: the monitoring device comprises a base module and an auxiliary module detachably mountable to the base module; the grounding line and the measuring unit are arranged in the base module; the electronic processing unit and the data storage medium are arranged in the auxiliary module; the base module comprises a first connector member, which is connected to the measuring unit; and the auxiliary module comprises a second connector member, which is connected to the electronic processing unit, the second connector member being configured to be engaged with the first connector member when the auxiliary module is mounted to the base module to thereby allow the electronic processing unit to receive said measuring signals from the measuring unit via the first and second connector members.