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3-72
Protection Functions
857-UM001A-EN-P – July 2009
Table 3.44 – Available Signals to be Supervised by the Programmable Stages
IL1, IL2, IL3
Io1
Io2
U12, U23, U31
UL1, UL2, UL3
Uo
f
P
Q
S
Cos Fii
IoCalc
I1
I2
I2/I1
I2/In
U1
U2
U2/U1
IL
Uphase (U
)
LN
Uline (U
)
LL
TanFii
Prms
Qrms
Srms
THDIL1
THDIL2
THDIL3
THDUa
THDUb
THDUc
fy
fz
IL1rms
IL2rms
IL3rms
U12y
U12z
ILmin, ILmax
ULLmin, ULLmax
ULNmin, ULNmax
Phase currents
Residual current input I
01
Residual current input I
02
Line-to-line voltages
Phase-to-ground voltages
Zero-sequence voltage
Frequency
Active power
Reactive power
Apparent power
Cosine ϕ
Phasor sum I
+ I
+ I
L1
L2
L3
Positive sequence current
Negative sequence current
Relative negative sequence current
Negative sequence current in pu
Positive sequence voltage
Negative sequence voltage
Relative negative sequence voltage
Average (I
+ I
+ I
/3
L1
L2
L3)
Average (U
+ U
+ U
/3
L1
L2
L3)
Average (U
+ U
+ U
/3
12
23
31)
Tangent ϕ [=tan(arccos )]
Active power rms value
Reactive power rms value
Apparent powre rms value
Total harmonic distortion of I
L1
Total harmonic distortion of I
L2
Total harmonic distortion of I
L3
Total harmonic distortion of input U
Total harmonic distortion of input U
Total harmonic distortion of input U
Frequency behind circuit breaker
Frequency behind 2
circuit breaker
nd
IL1 RMS for average sampling
IL2 RMS for average sampling
IL3 RMS for average sampling
Voltage behind circuit breaker
Voltage behind 2
circuit breaker
nd
Minimum and maximum of phase currents
Minimum and maximum of line voltages
Minimum and maximum of phase voltages
a
b
c
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