Photo Credit: Alex Mead
A mobile substation is just that, a substation on wheels. Mobile substations are generally used when a substation has to be shut down for maintenance purposes and the customer load cannot be jumpered to surrounding substations due to capacity limitations. Since maintenance activities can take several days or longer, it is unacceptable to give customers such a long outage. In these cases a mobile substation is driven in and connected to feed these customers while the main substation is being maintained.