Hitachi Relion 670 Series Commissioning Manual page 184

Section 11
Testing functionality by secondary injection
•
Test of IMinReverse setting pickup value
1. Change the following settings from the default values:
•
•
•
2. Inject the following analogue quantities given in secondary amperes and volts and wait for three
seconds:
IN
UN
1) Inject set value for IMinReverse+1.5% of CT secondary rated current, (that is0.025A+0.015A when IMinReverse
3. The following signals that shall be given from the APPTEF function:
•
•
4. Inject the following analogue quantities given in secondary amperes and volts and wait for three
seconds:
IN
UN
1) Inject set value for IMinReverse –1.5% of CT secondary rated current, ( 0.025A-0.015A when IMinReverse =2.5%
5. The following signal is given from the APPTEF function:
•
Test of function operation for high-ohmic EF
1. Change the following settings from the default values:
178
Only STUN at the beginning of injection.
The function did not operate for this forward EF now because the injected current is below
the set level.
OperationMode = Start and Trip in order to obtain the trip signal
IN>=3% (minimum value) in order not to interfere with this pickup test
IMinReverse =2.5% in order to be similar to the IN value
1)
=2.5% and CT rated secondary is 1A).
STUN at the beginning of injection.
STRV after approximately 150ms (default value for tStart=150ms)
The TRIP signal is not issued for EF in the reverse direction.
1)
and CT rated secondary is 1A)).
Only STUN at the beginning of injection.
The function did not operate for this reverse EF now because the injected current is below
the set level.
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GUID-158772EA-D4DA-415D-A388-C2D9837414ED v1
Magnitude=40mA; Angle=0 degrees
Magnitude=75V; Angle=0 degrees
Magnitude=10mA; Angle=0 degrees
Magnitude=75V; Angle=0 degrees
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Line distance protection REL670
1MRK506371-UUS Rev. M
Commissioning manual