05-12-2010 9:24 AM
Hi ,
Can any one explain the transformation ratio and how it is calculated in the system.
Thanks.
-Sasi.
05-12-2010 9:34 AM
Hello,
The transformation ratio specifies the conversion factor used by the register to which a transformer is connnected.
The transformation ratio can be specified for the device category, for the device, and for register. The transformation ratio for the register overwrites the ratio for the device and the ratio for the device overwrites the ratio for the device category.
The transformation ratio can only be specified if the measuring type of the device category is 1 or 2 (i.e. for semi-indirect or indirect measuring).
The billing factor is calculated in conjunction with the transformer factor of the connected transformer. The following formula is used:
Billing factor = transformer factor / transformation ratio.
It is also possible to specify the transformation ratio by specifying the primary or secondary voltage or current. In this case the transformation ratio is calculated and cannot be overwritten.
The ratio is calculated as follows:
primary voltage primary current
Transformation ratio = ________________ * ______________
secondary voltage secondary current
Also..
Windings define the transformation ratio (of transformers, for example) and are divided into primary and
secondary windings. A winding group contains at least one primary and one secondary winding.
Please see more at:
http://help.sap.com/saphelp_utilities472/helpdata/EN/c6/4dc670eafc11d18a030000e829fbbd/frameset.htm
Regards
Olivia
05-12-2010 7:42 PM
Transformation Ratio:
Usually for to measure high voltages and high currents..we cant measure with directly with normal ENERGY METER.
For this, we have Current Transformer and Potential Transformer.
For every transformer we have a specific ratio based on their winding design. this is N2/N1 or i2/i1 or V1/V2..
we will link energy meter to the above two transformers (CT and PT tranformers) so to measure High volages and currents
and finally its consumption.
Tranformation Ratio (K): CT RATIO * PT RATIO
multiplication of winding group ratios of ct ,pt for the respective meter gives the Billing factor
Edited by: Narendar konakanchi on May 13, 2010 12:56 PM