-3U
0
Operate area
3I
0
RCADir
= 0º
ROADir
= 80º
IEC06000652-3-en.vsd
IEC06000652 V3 EN
Figure 17:
Example characteristic
Non-directional earth fault current protection
Procedure
1.
Measure that the operate current is equal to the
INNonDir>
setting.
The function activates the START and STDIRIN output.
2.
Measure the operate time of the timer by injecting a current of 200% of the
operate value.
3.
Compare the result with the expected value.
The expected value depends on whether definite time
tINNonDir
or inverse time
was selected.
4.
Continue to test another function or complete the test by setting the test mode to
Off
.
Residual overvoltage release and protection
Procedure
1.
Measure that the operate voltage is equal to the
UN>
setting.
The function activates the START and STUN signals.
2.
Measure the operate time by injecting a voltage 1.2 timers set
UN>
operate
value.
3.
Compare the result with the set
tUN
operate value.
4.
Inject a voltage 0.8 ·
UNRel>
and a current high enough to operate the
directional function at the chosen angle.
5.
Increase the voltage until the directional function is released.
6.
Compare the measured value with the set
UNRel>
operate value.
Section 6
1MRK 502 049-UEN A
Testing functionality
66
Commissioning manual
