Testing of several devices in a system - Arc protection - Auto synchronization - Bay control and measurement - Merging unit - Transformer protection - 2 winding - Feeder protection - Voltage regulation - Capacitor bank protection - Petersen Coil control - Grid automation - Busbar differential protection (high impedance) - Back-up protection - Motor protection - Busbar protection (voltage and frequency) - Transformer protection - 3 winding - Interconnection protection - Generator protection - Power management/Load shedding - IEC 61850 Engineering Guide - REX640 Protection and control - PCL6 - IEC - ANSI - 14.02.2023

Any status data can be sent through GOOSE communication. Horizontal communication can be tested by forcing the outputs of the sender device using Testing and Commissioning pages of 640 LHMI and observing the results in the receiving device.