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1MAC050144-MB C
Section 8
Measurement functions
615 series ANSI
539
Technical Manual
Table 444: Parameters for deadband calculation
Power and energy calculation
The three-phase power is calculated from the phase-to-ground voltages and
phase-to-grond currents. The power measurement function is capable of calculating
complex power based on the fundamental frequency component phasors (DFT).
(Equation 61)
Once the complex apparent power is calculated, P, Q, S and PF are calculated with the
equations:
(Equation 62)
(Equation 63)
(Equation 64)
(Equation 65)
Depending on the unit multiplier selected with
Power unit Mult
, the calculated power
values are presented in units of kVA/kW/kVAr or in units of MVA/MW/MVAr.
Function
Settings
Maximum/minimum (=range)
Three-phase current
measurement (IA, IB, IC)
A deadband
40 / 0 (=40xIn)
Three-phase voltage
measurement (VA, VB, VC)
V Deadband
4 / 0 (=4xVn)
Ground current measurement
(IG)
A deadband res
40 / 0 (=40xIn)
Ground voltage measurement
(VG)
V deadband res
4 / 0 (=4xVn)
Phase sequence current
measurement (I1, I2, I0)
Ps Seq A deadband, Ng Seq A
deadband, Zro A deadband
40 / 0 (=40xIn)
Phase sequence voltage
measurement (V1, V2, V0)
Ps Seq V deadband, Ng Seq V
deadband, Zro V deadband
4/0 (=4xVn)
Three-phase power and energy
measurement (P, E)
-
In the three-phase power and energy measurement function, P, E, the
deadband supervision is done separately for apparent power S, with the
pre-set value of fixed 10 percent of the Sn and the power factor PF, with
the pre-set values fixed at 0.10. All the power measurement related values
P, Q, S and PF are reported simultaneously when either one of the S or PF
values exceeds the pre-set limit.
S
=
⋅
+
⋅
+
⋅
(V
I
V
I
V
I
A
A
B
B
C
C
*
*
*
)
Q
S
=
Im( )
Q
S
=
Im( )
S
S
P
Q
=
=
+
2
2
Cos
P
S
=
Summary of Contents for 615 Series ANSI
Page 1: ...Relion Protection and Control 615 series ANSI Technical Manual ...
Page 2: ......
Page 29: ...1MAC050144 MB C Section 615 series ANSI 22 Technical Manual ...
Page 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Page 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
Page 635: ...Section 10 1MAC050144 MB C Other functions 628 615 series ANSI Technical Manual ...
Page 711: ...Section 16 1MAC050144 MB C Glossary 704 615 series ANSI Technical Manual ...
Page 712: ......