In practice, the limit is not defined by the TOR-5 hardware itself, but by the server configuration and the SCADA or web interface used to display the data. A single TOR-5 server can usually handle dozens of transformers in parallel, as each unit only transmits a small set of parameters with low data rate. The real constraint is screen ergonomics: most operators comfortably monitor 8-16 transformers on one dashboard, using grouping and alarms rather than trying to view everything at once.