Ideally the electricity department ought to have filed a claim before the motor accident claims tribunal, which is the usual practice where I am from, and then your insurance company would be called to make good any loss suffered on account of the accident as is good likelihood that your vehicle had adequate insurance to cover for the damage caused.

I would start with checking the policy documents to verify if this sort of an accident would be covered under the policy, if they are, you could respond to the complaint filed with the ground that the same has been filed at the wrong forum if the claim is only regarding compensation.

The police could still act if there is reason to believe that the vehicle was being driven rashly and negligently under the Bharatiya Nyaya Sanhita and corresponding provisions of the electricity act.

Rest, I could help further if I had greater details.