Transformer Loss Compensation; Time Of Use - Siemens US2:9810T24V User Manual

9810 series - User manual

Transformer loss compensation

Transformer Loss Compensation (TLC) is the method for compensating for the measurable
losses that occur when there is a physical separation between the meter and the actual billing
point.
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
NOTE: Due to the variation in installations, advanced knowledge of power systems and
connection methods is required before transformer loss compensation can be properly
implemented. Data parameters should only be programmed by qualified personnel that have
appropriate training and experience with Transformer Loss Compensation calculations.
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.
For more information, see the Transformer Line Loss Calculations technical note, available on
www.usa.siemens.com/pds.

Time of use

Time of Use (TOU) is often used when a utility has set up schedules with different rates based on
time of day, type of day and date when energy is consumed.
You can view the TOU active rates and seasons using the display.
For more information on how to configure TOU on your meter, see the ION Setup online help,
available from www.usa.siemens.com/pds.
For more information on the Time of use module and its settings, see ION Reference, available on
www.usa.siemens.com/pds.
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