Functions
2.17 Additional Functions
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
213
2.17.9 Energy
Metered values for real and reactive power are determined by the processor system in the background. They
can be called up at the front of the device, read out via the operating interface using a PC with DIGSI, or trans-
ferred to a central master station via the system interface.
2.17.9.1 Energy Metering
7SD80 integrates the calculated power as a function of time and then provides the results under Measured
Values. The components as listed in Table 2-13 can be read out. The signs of the operating values depend on
the setting at address 1107 P,Q sign (see Section 2.17.3 under margin heading „Display of Measured Val-
ues“).
Please take into consideration that 7SD80 is, above all, a protection device. The accuracy of the metered
values depends on the instrument transformers (normally protection core) and the device tolerances. The me-
tering is therefore not suited for tariff purposes.
The counters can be reset to zero or any initial value (see also SIPROTEC 4 System Description).
Table 2-13 Operational metered values
2.17.9.2 Setting Notes
Retrieving Parameters
The SIPROTEC 4 System Description describes in detail how to read out the statistical counters via the device
front panel or DIGSI. The values are added up in direction of the protected object provided the direction was
set as „forward“ (address 201).
2.17.9.3 Information List
Measured Values primary
W
p
+ Real power, output kWh, MWh, GWh
W
p
– Real power, input kWh, MWh, GWh
W
q
+ Reactive power, output kVARh, MVARh, GVARh
W
q
– Reactive power, input kVARh, MVARh, GVARh
No. Information Type of In-
formation
Comments
- Meter res IntSP_Ev Reset meter
888 Wp(puls) PMV Pulsed Energy Wp (active)
889 Wq(puls) PMV Pulsed Energy Wq (reactive)
916 WpΔ= - Increment of active energy
917 WqΔ= - Increment of reactive energy
924 Wp+= MVMV Wp Forward
925 Wq+= MVMV Wq Forward
928 Wp-= MVMV Wp Reverse
929 Wq-= MVMV Wq Reverse
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