What to Prepare Before a First Consultation

Before the first meeting with a SCADA integrator, it helps to have a clear picture of the existing infrastructure. Many subestación operators arrive with only a general idea of the network topology, which forces the consultant to spend the first session gathering basic data instead of discussing solutions.

Start by collecting single-line diagrams of the medium-voltage substations. These drawings show the arrangement of busbars, circuit breakers, disconnectors, and transformers. Without them, it is difficult to propose a logical control architecture or to decide where to place redundant PLCs.

Also prepare a list of the protection relays currently installed. Note the manufacturer, model, and communication protocol (IEC 61850, Modbus, DNP3). This information determines whether the existing relays can be integrated directly into the new SCADA or if protocol converters will be needed.

Another useful document is the historical record of transient overvoltage events. If the substation has experienced atmospheric surges in the past, the consultant can recommend specific preventive cut-off strategies and grounding improvements during the first consultation rather than in a later revision.

Finally, think about the operational roles that will use the HMI screens. A control room operator needs different information than a maintenance technician. Listing these roles beforehand helps the designer create a hierarchical navigation that matches real workflows.

• Single-line diagrams of each medium-voltage substation
• List of protection relays with communication protocols
• Historical records of transient overvoltage events
• Operational roles that will interact with the HMI
• Existing network topology and redundancy requirements