Table of Contents
Advertisement
Section 6
Testing functionality
6.9.3.2
6.9.3.3
6.9.3.4
130
Weak-end infeed logic at permissive schemes
1.
Check the blocking of the echo with the injection of a CRL signal >40 ms after a
reverse fault is applied.
2.
Measure the duration of the echoed CS signal by applying a CRL receive signal.
3.
Check the trip functions and the voltage level for trip by reducing a phase voltage
and applying a CRL receive signal.
Testing conditions
Only one type of fault is sufficient, with the Current reversal and WEI logic for
distance protection phase segregated ZCWSPSCH (85). Apply three faults (one in each
phase). For phase A-G fault, set these parameters:
Table 12:
Phase A-G parameter values
Phase
I (Amps)
A
0
B
0
C
0
Change all settings cyclically for other faults (BG and CG).
Weak-end infeed set for echo and trip.
1.
Apply input signals according to
2.
Activate the receive (CR) signal of the terminal.
3.
After the relay has operated, turn off the input signals.
4.
Check that trip, send signal, and indication are obtained (note: a 200ms pulse).
5.
Apply input signals according to
6.
Activate the receive (CR) signal of the terminal.
7.
After the relay has operated turn off the input signals.
8.
Check that the send signal is obtained.
Completing the test
Continue to test another function or end the testing by setting the parameter TestMode
to Disabled under Main menu/Tests/IED test mode/1:TESTMODE. If another
function is tested, then set the parameter Blocked to No under Main menu/Tests/
Function test modes/Scheme communication/ZCWSPSCH(85)/1:ZCWSPSCH for
Phase-angle
V (Volts)
(Deg)
0
Set less than
PU27PN
240
69.3
120
69.3
table
12.
table
12.
1MRK 506 331-UUS A
Phase-angle (Deg)
0
240
120
Commissioning Manual
Advertisement
Table of Contents
