Agent technology in the power system domain isthe realm of theory and laboratory simulation. Agent-basedsystems, due to their complexity of concept and design, mayappear difficult to implement and maintain, and hence moreexpensive, which is a prohibiting factor against using the newtechnology. Designing a decision-making system for an agent isone of the most complex tasks in the development of agent-basedsystems. Designing a decision-making system enabling proactivebehaviours while maintaining reasonable complexity is achallenge. This paper proposes an deliberative decision makingsystem for an industrial agent which allows pro-active behaviourof the agent while maintaining reasonable complexity. It employsa combination of practical and procedural reasoning principles.The formal definition of the proposed deliberative layer isderived in the paper. The procedural reasoning is based on IEC61850 Logical Node concept and implemented with IEC 61499reference architecture. The proposed agent architecture isdemonstrated on the Fault Location Isolation and SupplyRestoration application and validated via so-simulation withMatlab model of the sample distribution network.