Hitachi RED670 Commissioning Manual page 185

1MRK 505 378-UEN Rev. K
Injected quantities provided below are only for the neutral current IN and the neutral voltage UN. This
assumes that these two quantities are connected to the IED on separate inputs and connected to the
APPTEF function using two SMAI preprocessing function blocks. Each of these two signals is
connected as the fourth input on respective SMAI function block.
If the above is not the case, for example; the UN is not connected to the IED but instead internally
calculated by the IED from the three phase-to-ground voltages, then simply inject the following
values for the three voltages:
UL1=sqrt(3)*UN; UL2=0V; UL3=0V
where, UN is the secondary voltage value given for every test below.
If IN is not connected to the IED but instead internally calculated by the IED from the three phase
currents, then simply inject the following values for the three currents:
IL1=IN; IL2=0A; IL3=0A
where, IN is the secondary current value given for every test below.
Test of IMinForward 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 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
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
5. The following signal is given from the APPTEF function:
•
Line differential protection RED670
Commissioning manual
OperationMode = Start and Trip in order to obtain the trip signal
IN>=3% (minimum value) in order not to interfere with this pickup test
The default value for IMinForward =2.5% is used for this test.
1)
the 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)
=2.5% and CT rated secondary is 1A)).
Only STUN at the beginning of injection.
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Testing functionality by secondary injection
GUID-8F3DDF4D-DAF4-4873-9AA0-682A9D8E7D68 v1
Magnitude=40mA; Angle=180 degrees
Magnitude=75V; Angle=0 degrees
Magnitude=10mA; Angle=180 degrees
Magnitude=75V; Angle=0 degrees
Section 11
179