13.47
Date Code 20060320
Instruction Manual
SEL-311C Relay
Testing and Troubleshooting
Test Procedures
Step 4. From Access Level 2, execute the
SET L
n
command to
configure Output 6 to close for assertion of the Z2G element.
=>>
SET L 1 OUT106 <Enter>
SELogic group 1
OUT106 =0
?
Z2G <Enter>
OUT107 =0
?
END <Enter>
Step 5. After you type
END <Enter>
to end the set procedure, the
relay displays the current logic settings.
Step 6. Type
Y <Enter>
to accept those settings.
Step 7. Connect output
OUT106
to the sense input of your test set, an
ohmmeter, or some other contact-sensing device.
Step 8. Connect the voltage sources to the A-phase, B-phase, and
C-phase to neutral relay voltage inputs.
Step 9. Connect the current source to the A-phase relay current input.
Refer to the voltage and current connections shown in
as an example.
Step 10. Select the magnitude of the test signals, I
A
and V
A
.
summarizes the test quantities for the Zone 2 A-G
ground quadrilateral distance element based upon the example
relay settings.
The following text describes a hand calculation method you can
use to calculate relay distance element voltage and current test
signals. If you do not want to review this information, go to
The relay ground distance elements operate based upon the
magnitude of applied phase-ground impedance. The impedance
calculation is supervised by the functions described. To
effectively test the distance elements, select test signals that
fulfill the impedance and supervisory requirements of the relay,
but are within the ability of the test sources to produce
accurately.
The reactive reach of the quadrilateral distance element under
test is defined by the XG2 element setting. In this case,
XG2 = 9.36 secondary ohms. The impedance the relay
measures for a ground fault is determined by the faulted phase
voltage, faulted phase current, and the residual current
multiplied by the zero-sequence current compensation factor,
k0. The SEL-311C uses k01M and k01A settings to define the
Table 13.7
Test Quantities for Zone 2 Ground Quadrilateral Distance
Element: Reactive Reach
Test Voltages
Test Current
V
A
= 40.4
∠
0° volts
I
TEST
= 2.49
∠
–90.0° amps
V
B
= 67.0
∠
–120° volts
V
C
= 67.0
∠
120° volts
Summary of Contents for SEL-311C
Page 1: ...20060320 SEL 311C Relay Protection and Automation System Instruction Manual PM311C 01 NB ...
Page 22: ...This page intentionally left blank ...
Page 42: ...This page intentionally left blank ...
Page 68: ...This page intentionally left blank ...
Page 128: ...This page intentionally left blank ...
Page 294: ...This page intentionally left blank ...
Page 330: ...This page intentionally left blank ...
Page 402: ...This page intentionally left blank ...
Page 406: ...This page intentionally left blank ...
Page 454: ...This page intentionally left blank ...
Page 574: ...This page intentionally left blank ...
Page 592: ...This page intentionally left blank ...
Page 616: ...This page intentionally left blank ...
Page 648: ...This page intentionally left blank ...
Page 652: ...This page intentionally left blank ...
Page 678: ...This page intentionally left blank ...
Page 682: ...This page intentionally left blank ...
Page 722: ...This page intentionally left blank ...
Page 724: ...This page intentionally left blank ...