ABB Relion 670 Series Commissioning Manual page 123
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Also See for Relion 670 Series:
- Technical manual (1432 pages) ,
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1MRK 511 403-UEN Rev. K
However, it must be noted that the secondary values given below can be used for most installations
because, usually:
1.
VT rated primary voltage value is equal to the UBase setting (70kV in the given example above)
2.
CT rated primary current value is equal to the IBase setting (1000A in the given example above)
Consequently these two quantities cancel each other in the calculations for the correct secondary
injected quantities. The frequency is not explicitly specified, use the rated frequency of the protected
network (either 50Hz or 60Hz) for signals given below.
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:
Bay control REC670
Commissioning manual
The default setting values are used in the following test procedures if not otherwise
stated for a particular test.
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).
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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
Section 11
117
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