Detailed design services were provided to design the replacement of aged indoor 11 kV switchgear and the 110 V DC battery bank and charger at several indoor 11 kV substations and 33 / 11 kV substations. These services included: specification of the new switchgear, detailed design and specification of protection requirements, analysis and modification of the circuit connections, specification of installation procedure, detailed design of control, auxiliary power and indication wiring, specification and installation design for a new DC battery bank and charger and modification of the existing or specification of a new RTU.