Different designs of portable substations are available.

Different designs of portable substations are available. In some trailer mounted substation there the farady 50 kva pole mount transformer is placed on 360o rotating bed, which helps to positioning bushing under existing power line with minimum effort and set up time. In that case as only the transformer rotates but the trailer mounted switchgear system can not be repositioned them self with rotation of transformer, hence customer has to provide HV and LV switchgear and protection for the farady ac power transformer. This is one typical example of portable substation design, and there are many others depending upon customer requirement.