#Product Trends
Measurements of floor and wall resistance using the Sonel PRS-1 test probes
Effective insulation of test stands.
Effective protection ensured by the reduction of floor and wall conductivity should provide such operating conditions so that the worker is not exposed to the risk of contact with potentials other than the potential of defective equipment, i.e. hazardous electrical shock currents.
Such a solution is based on the insulation of the test stand from the ground and equalizing the potentials of conductive parts (using non-earthed equipotential bonding) which are not a part of the electrical circuit to supply the test stand (fig-2).
If external conductive parts can be reached from the test stand within a distance
<2m, insulating shields with at least a 2kV electrical rating should be provided.
This condition can be precisely verified with a Sonel MIC-2510 insulation resistance meter, which allows adjustments of the measuring voltage within a range of 50-2500V in 10 V steps. The use of a barrier made with conductive materials requires it to be insulated from the ground and accessible conductive parts.
