Power Network Application Trainer
– Earthing / Grounding network impedance measurement
74
Figure 55-2: Step voltage measurement with MI3295S & MI3295M instruments
Contact voltage
is defined as potential difference between the ground potentialof a
grounding system- the surface potential where a person could stand while at the same
time having a handin contact with a grounded structure or object.
The measurement of contact voltage is performed between an earthed accessible metal
part and ground 1 meter apart from the tested object. The voltage between the probes
is measured by a voltmeter with an internal resistance of 1 kΩ that simulates the body
resistance (test step/contact voltage plates or 25kg probes should be used).
Figure 56-2: Contact voltage measurement with MI3290 instrument
Figure 57-2: Contact voltage measurement with MI3295S & MI3295M instruments
Summary of Contents for MI 3298
Page 55: ...Power Network Application Trainer Earthing Grounding network impedance measurement 55 ...
Page 56: ...Power Network Application Trainer Earthing Grounding network impedance measurement 56 ...
Page 124: ...Power Network Application Trainer Earthing Grounding network impedance measurement 124 ...
Page 228: ...MI 3290 Earth Analyser 228 ...
Page 229: ...MI 3280 Digital Transformer Analyser 229 ...
Page 230: ...MI 3280 Digital Transformer Analyser 230 ...
Page 231: ...MI 3250 MicroOhm 10A 231 ...
Page 232: ...MI 3205 TeraOhmXA 5kV 232 ...