A monitoring device determines local system leakage capacitance in ungrounded power supply system

The utility model relates to a monitoring device (9) used for selectively determining local system leakage capacitance (Ce) in a non-grounding power supply system (2) composed of a main system (4) andat least one local system (6). The monitoring device comprises an expanded insulation monitoring system (20) configured to be used for determining the overall system leakage capacitance (Ceges) of apower supply system (2); an extended insulation fault location system (30) configured for determining ohmic and capacitive local test current portions (Ire, Ice) of the local test current (Ie) captured in the respective local system (6); and an impedance evaluation system (40) for determining a local insulation resistance (Re) and a local system leakage capacitance (Ce) of each local system (6) tobe monitored. 本实用新型涉及一种用于选择性地确定由主系统(4)和至少一个局部系统(6)组成的非接地供电系统(2)中的局部系统泄漏电容(Ce)的监测设备(9)。根据本实用新型的监测设备包括：扩展的绝缘监测系统(20)，被配置为用于确定供电系统(2)的整体系统泄漏电容(Ceges)；扩展的绝缘故障定位系统(30)，被配置为用于确定在相应的局部系统(6)中捕获的局部测试电流(Ie)的欧姆和电容性局部测试电流部分(Ire，Ice)；以及阻抗评