Siemens SIPROTEC 4 7VK61 - Measurement; Functional Description

No. Information Type of
Informa-
tion
Comments
1028 Σ IL2 = VI Accumulation of interrupted current L2
1029 Σ IL3 = VI Accumulation of interrupted current L3
1030 Max IL1 = VI Max. fault current Phase L1
1031 Max IL2 = VI Max. fault current Phase L2
1032 Max IL3 = VI Max. fault current Phase L3
2895 AR #Close1./1p= VI No. of 1st AR-cycle CLOSE commands,1pole
2896 AR #Close1./3p= VI No. of 1st AR-cycle CLOSE commands,3pole
2897 AR #Close2./1p= VI No. of higher AR-cycle CLOSE commands,1p
2898 AR #Close2./3p= VI No. of higher AR-cycle CLOSE commands,3p
Measurement
Functional Description
Display of Measured Values
Depending on the ordering code, connection of the device and configured protection functions, only some of
the operational measured values listed in Table 2-8 may be available. Phase-to-earth voltages can only be
measured if the phase-to-earth voltage inputs are connected. The displacement voltage 3 U
0
is the e-n voltage
multiplied with √
3 – if U
en
is connected – or calculated from the phase-to-earth voltages 3U
0
= |U
L1
+ U
L2
+
U
L3
|. This requires the three voltage inputs phase-to-earth to be connected. The zero-sequence voltage U
0
indi-
cates the voltage between the delta center and earth.
If the device features synchronism and voltage check and if, when configuring the functions (address 135)
these functions were set as Enabled and the parameter U4 transformer (address210) to Usy2 transf.,
you can read out the characteristic values (voltages, frequencies, differences).
The power and operating values upon delivery are set such that power in line direction is positive, active
components in line direction and inductive reactive components in line direction are positive. The same
applies for the power factor cosφ. It is occasionally desired to define the power draw from the line (e.g. as
seen from the consumer) positively. Using parameter address 1107 P,Q sign the signs for these compo-
nents can be inverted.
The computation of the operational measured values is also executed during an existent system fault in inter-
vals of approx. 0.5 s.
Table 2-8
Operational measured values of the local device
Measured values Primary secon-
dary
% referred to
Ι
L1
, Ι
L2
, Ι
L3
Phase currents A A
Rated operational current
1)
3Ι
0
- calculated
Earth current A A
Rated operational current
1)
3Ι
0
- measured
Earth current A A
Rated operational current
3)1)
Ι1, Ι2
Positive and negative sequence compo-
nent of currents
A A
Rated operational current
1)
U
L1-E
, U
L2-E
, U
L3-E
Phase-to-earth voltages kV V
Rated operational voltage / √3
2)
U
L1-L2
, U
L2-L3
, U
L3-L1
Phase-to-phase voltages kV V
Rated operational voltage
2)
3U
0
Displacement Voltage kV V
Rated operational voltage / √3
2)
U
0
Zero-sequence voltage kV V
Rated operational voltage / √3
2)
U
1
, U
2
Positive and negative sequence compo-
nent of voltages
kV V
Rated operational voltage / √3
2)
2.9.3
2.9.3.1
Functions
2.9 Auxiliary Functions
SIPROTEC 4, 7VK61, Manual 165
C53000-G1176-C159-5, Edition 05.2018