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Example
7SJ61/62/63, 6MD63, 7UM61 PROFIBUS-DP – Communication profile
C53000-L1840-B001-02
Ground currents: I
,I
Ns
N
Parameter:
0204 Current transducer – Rated primary current
0207 Ratio factor I
0208 Ration factor I
Product of parameters 0204 and 0207
or 0204 and 0208
0.0 ... 1.0 A
>1.0 ... 10.0 A
>10.0 ... 100.0 A
>100.0 ... 1000.0 A
>1.0 kA ... 10.0 kA
>10 kA
Power: P, Q, S
Parameter:
1101 Nominal operation voltage of primary equipment
1102 Nominal operating current of primary equipment
Product of parameters 1101 and 1102
multiplied by
10.0 ... 100.0 kW (kVAR)
>100.0 ... 1000.0 kW (kVAR)
>1.0 ... 10.0 MW (MVAR)
>10.0 ... 100.0 MW (MVAR)
>100.0 ... 1000.0 MW (MVAR)
>1.0 ... 10.0 GW (GVAR)
>10 GW (GVAR)
Definition of the scaling for a power measurement value
In the parameter set is configured:
Nominal operation voltage of primary equipment (1101) = 12.00 kV
Nominal operating current of primary equipment (1102) = 100 A
It follows:
3
V
* I
*
= 2078.46 kW (kVAR) = 2.078 MW (MVAR)
nom
nom
In the SIPROTEC device the power measurement values are available
with the following number representation and unit (see table above):
0.00 ... 99.99 MW (MVAR)
According to this a scaling factor of 100 is meaningful.
With that the "Measured value
to be interpreted as:
+/- 32768 corresponds to +/- 327.68 MW (MVAR)
PROFIBUS-DP – Parameterization in DIGSI
/ I
or (dependent on the device type)
N
ph
/ I
Ns
ph
Number representation / unit
Number representation / unit
3
0.0 ... 999.9 kW (kVAR)
0 ... 9999 kW (kVAR)
0.00 ... 99.99 MW (MVAR)
0.0 ... 999.9 MW (MVAR)
0 ... 9999 MW (MVAR)
0.00 ... 99.99 GW (GVAR)
0.0 ... 999.9 GW (GVAR)
" in the PROFIBUS-DP message has
Integer
0 ... 9999 mA
0.00 ... 99.99 A
0.0 ... 999.9 A
0 ... 9999 A
0.00 ... 99.99 kA
0.0 ... 999.9 kA
6-9
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