Siemens SIPROTEC 4 7VK61 - Energy; Energy Metering; Setting Notes; Information List

No. Information Type of
Informa-
tion
Comments
638 Usy2= MV Measured value Usy2
641 P = MV P (active power)
642 Q = MV Q (reactive power)
643 PF = MV Power Factor
644 Freq= MV Frequency
645 S = MV S (apparent power)
646 F-sy2 = MV Frequency fsy2
647 F-diff= MV Frequency difference
648 φ-diff= MV Angle difference
649 F-sy1 = MV Frequency fsy1
684 U0 = MV U0 (zero sequence)
Energy
Metered values for active and reactive power are determined in the background by the processor system. 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.
Energy Metering
7VK61 integrates the calculated power as a function of time and then provides the results under the measured
values. The components as listed in Table 2-9 can be read out. The signs of the operating values depend on
the setting at address 1107 P,Q sign (see Section 2.9.3 Measurement under margin heading“Display of
Measured Values”).
Please take into consideration that 7VK61 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
metering 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 2-9
Operational metered values
Measured values Primary
W
p
+ Active power, output kWh, MWh, GWh
W
p
– Active power, input kWh, MWh, GWh
W
q
+ Reactive power, output kVARh, MVARh, GVARh
W
q
– Reactive power, input kVARh, MVARh, GVARh
Setting Notes
Retrieving Parameters
The SIPROTEC 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
configured as “forward” (address 201).
Information List
No.
Information Type of
Informa-
tion
Comments
- Meter res IntSP_Ev Reset meter
2.9.4
2.9.4.1
2.9.4.2
2.9.4.3
Functions
2.9 Auxiliary Functions
SIPROTEC 4, 7VK61, Manual 167
C53000-G1176-C159-5, Edition 05.2018