12 Apr MRU-200 – Can I apply the current surge method for current measurements on electric poles and stations without disconnecting their earthing?
Since this is a pulse method, it can be used for the measurement of multiple earthing, including objects such as power line poles, without the need to disconnect their earthing (and this requires switching the line off).
In addition, PN-EN 62305 standard requires the earthing impedance measurements, which are carried out with the current surge method.
During the measurement a lightning current flow (pulse current) is simulated. The largest part in grounding this current has the initial part of the earth electrode, where measurements take place.