ABB Relion 670 Series Commissioning Manual page 208

Section 11
Testing functionality by secondary injection
2. Inject the following analogue quantities given in secondary amperes and volts and wait for three
seconds to obtain the trip output (the default delay for tTrip=2s):
IN
UN
1) Inject set value for IMinForward +1.5% of CT secondary rated current, note that 1.5% is stated accuracy for the
3. The following signals 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 IMinForward –1.5% of CT secondary rated current, ( 0.025A-0.015A when IMinForward =2.5%
5. The following signal is given from the APPTEF function:
•
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:
202
The default value for IMinForward =2.5% is used for this test.
1)
function.(That shall be ((2.5%+1.5%)/100)*1A=0.025A+0.015A when IMinForward =2.5% and CT rated secondary
is 1A).
STUN at the beginning of injection.
WRNFW as a 50ms pulse after approximately 35ms from the injection start.
STFW after approximately 150ms (default value for tStart=150ms)
TRIP after approximately 2.15s (after tStart+tTrip)
1)
and CT rated secondary is 1A)).
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
© 2017 - 2021 Hitachi Power Grids. All rights reserved
Magnitude=40mA; Angle=180 degrees
Magnitude=75V; Angle=0 degrees
Magnitude=10mA; Angle=180 degrees
Magnitude=75V; Angle=0 degrees
GUID-158772EA-D4DA-415D-A388-C2D9837414ED v1
Transformer protection RET670
1MRK 504 165-UUS Rev. J
Commissioning manual