Transformer loss compensation
TLC is used when a meter’s actual location is different from the electrical location where change of ownership occurs, for example, if meters are connected on the low-voltage side of power transformers but the ownership change occurs on the high-side of the transformer. Meters are usually installed on the low-voltage side of a transformer because it is more cost-effective
There are cases where the change of ownership occurs halfway along a transmission line, where it is impractical to install a meter. In this case, power metering must be compensated using line loss calculations.
See the Transformer / line loss calculations technical note available fromwww.schneider-electric.com.