step & touch potential
step & touch potential
(OP)
Dear all,
Is the step & touch potential and related earthing also applicable for an indoor buil subsation ?
thanks
Is the step & touch potential and related earthing also applicable for an indoor buil subsation ?
thanks






RE: step & touch potential
RE: step & touch potential
The most usual differences are:
a) Indoor substations are smaller in area than the outdoor one creating additional challenge to achieve the desire grid resistance.
b)That the allowable step and touch potential for outdoor substation is ussually larger than indoor substation.
For instance, indoor substations usually have concrete slab floor with low resistivity (50 to 90 Ohm.m) while outdoor substation usually have crushed rock with wet resistivity of 2000 to 3000 Ohm.m.
Shoes, paint coating or insulated mat may be considered in the analysis for improve the allowable step and touch potentials in indoor substations.
RE: step & touch potential
RE: step & touch potential