MEASURING THE INSULATING RESISTANCE IN NETWORKS WITH ISOLATED STAR CENTRE CONTROLLED BY AN AZUR DEVICE

The AZUR apparatus is intended to control the insulating resistance in mine networks with an isolated star centre. The indication of the measured insulating resistance is realised by a pointer meter with a reversed nonlinear scale, which makes it difficult to read. The methodology for the development of an analogue converter is considered here, which linearises the non-linear characteristic current-resistance and, together with a light indicator, the device allows for more accurate and easy reading. An analysis of the error and the measurement range is made.