P.9.39
Date Code 20151029 Protection Manual SEL-411L Relay
Monitoring and Metering
Metering
ANG (DEG) -65.69 174.39 54.52 -65.59 -66.57 -66.29
THROUGH (pu) 1.205 1.001 1.001 0.204 0.197
Differential
IA IB IC I1 3I2 3I0
MAG (pu) 2.173 1.666 1.668 0.516 0.511
ANG (DEG) -30.17 -152.88 87.24 -21.82 -21.25
Alpha Plane
IA IB IC I1 3I2 3I0
k 0.844 0.952 0.958 0.503 0.502
alpha (DEG) -66.44 67.30 67.06 -66.27 -65.79
Figure 9.21 Response to the MET DIF Command When 87kF, 87kQ and 87kG
Are Not Forced to Zero
MET DIF <Enter>
Relay 1 Date: 11/23/2011 Time: 12:17:55.524
Station A Serial Number: 0000000000
87L Communication: Master
87L Function: Available
Stub Bus: Disabled
Local Terminal
IA IB IC I1 3I2 3I0
MAG (pu) 1.981 0.989 0.990 1.320 0.993 0.990
ANG (DEG) -0.14 -119.92 120.20 0.00 -0.47 -0.38
THROUGH (pu) 2.001 1.001 1.001 1.001 1.001
Remote Terminal 1
IA IB IC I1 3I2 3I0
MAG (pu) 1.991 0.993 0.994 1.326 0.999 0.995
ANG (DEG) -0.56 -120.45 119.68 -0.47 -0.81 -0.67
THROUGH (pu) 2.001 1.001 1.001 1.007 1.001
Differential
IA IB IC 3I2 3I0
MAG (pu) 3.972 1.982 1.984 1.992 1.985
ANG (DEG) -0.35 -120.18 119.94 -0.64 -0.52
Alpha Plane
87LA 87LB 87LC 87LQ 87LG
k 0.000 0.000 0.000 0.000 0.000
alpha (DEG) 0.00 0.00 0.00 0.00 0.00
=>>
Figure 9.22 Response to the MET DIF Command When 87kF, 87kQ and 87kG
Are Forced to Zero
Table 9.22 Differential Metering Quantities
Metered Quantity Symbol Units
Phase current magnitude |I|pu
Phase current angle (I)deg
Positive-sequence current magnitude |I1| pu
Positive-sequence current angle
a
a
Positive-sequence quantities are not displayed for differential and Alpha Plane.
(I1) deg
Negative-sequence current magnitude
a
|3I2| pu
Negative-sequence current angle (3I2) deg
Zero-sequence current magnitude |3I0| pu
Zero-sequence current angle (3I0) deg
NOTE: Alpha Plane values are forced
to zero when the differential quantity
> 95% of the restraint quantity. These
values are forced independently on a
per-phase and per-sequence basis.
To Next Page
Loading...
