Date Code 20010625
Setting the Relay
9-49
SEL----311L Instruction Manual
Quadrilateral and Mho Ground Distance Fault Detector Settings
Zone 1 phase current FD (0.50–100.00
Α
secondary {5 A nom.};
0.10–20.00
Α
secondary {1 A nom.}) (see Figures 3.32 and 3.35)
50L1 = 0.5
Zone 1 residual current FD (0.50–100.00
Α
secondary {5 A nom.};
0.10–20.00
Α
secondary {1 A nom.}) (see Figures 3.32 and 3.35)
50GZ1 = 0.5
Set 50L1 and 50GZ1 to their minimum values when LOP logic is enabled.
Zero Sequence Compensation (ZSC) Settings (see
Ground Distance Elements
in
Section 3)
Zone 1 ZSC factor magnitude (0.000–6.000 unitless)
k0M1 = 0.766
Zone 1 ZSC factor angle (-180.0
°
to +180.0
°
)
k0A1 = -16.74
Zero-sequence current compensation adjusts the apparent reach of a ground distance element so
that it is equal to the phase element reach. Ground distance elements and phase distance
elements can then be set to the same values. Calculate Zone 1 zero-sequence current
compensation factor with either the primary or secondary values of the positive-sequence and zero-
sequence line impedance.
°
−
∠
=
°
∠
°
∠
−
°
∠
=
−
=
74
.
16
766
.
0
7
.
84
42
.
1
•
3
7
.
84
42
.
1
00
.
73
64
.
4
Z
•
3
Z
Z
01
k
1
L
1
1
L
1
1
L
0
Mho Phase Distance Element Time Delays (See Figure 3.39)
Zone 1 time delay (OFF, 0.00–16000.00 cycles)
Z1PD = OFF
Zone 2 time delay (OFF, 0.00–16000.00 cycles)
Z2PD = OFF
Zone 3 time delay (OFF, 0.00–16000.00 cycles)
Z3PD = OFF
Use common time delays to reduce the likelihood of a timer reset during an evolving fault.
Separate phase and ground time delays are set OFF.
Quadrilateral and Mho Ground Distance Element Time Delays (See Figure 3.39)
Zone 1 time delay (OFF, 0.00–16000.00 cycles)
Z1GD = OFF
Zone 2 time delay (OFF, 0.00–16000.00 cycles)
Z2GD = OFF
Zone 3 time delay (OFF, 0.00–16000.00 cycles)
Z3GD = OFF
Common Phase/Ground Distance Element Time Delay (See Figure 3.39)
Zone 1 time delay (OFF, 0.00–16000.00 cycles)
Z1D = OFF
Zone 2 time delay (OFF, 0.00–16000.00 cycles)
Z2D = OFF
Zone 3 time delay (OFF, 0.00–16000.00 cycles)
Z3D = 20.0
Summary of Contents for SEL-311L
Page 6: ......
Page 8: ......
Page 26: ......
Page 54: ......
Page 144: ......
Page 216: ......
Page 252: ......
Page 302: ......
Page 338: ......
Page 480: ......
Page 484: ......
Page 486: ......
Page 502: ......
Page 532: ...12 28 Standard Event Reports and SER Date Code 20010625 SEL 311L Instruction Manual 4 ...
Page 552: ......
Page 554: ......
Page 574: ......
Page 576: ......
Page 596: ......
Page 602: ......
Page 628: ......
Page 656: ......
Page 662: ......
Page 664: ......
Page 688: ......
Page 700: ......
Page 716: ......
Page 722: ......
Page 734: ......