ABB Relion 670 Series Commissioning Manual page 141

1MRK 504 165-UEN E
17. Similarly, operation mode for power swing detection in at least two phases will be
blocked by enabling the input BLK2PH.
18. Repeat steps 5,
START, ZOUT and ZIN will be disappeared.
19. Output signal START will also get activated instantaneously by enabling input EXTERNAL
and this input signal can be configured in ACT to the output derived from some external
logics used to detect power swings. By enabling the input signal BLOCK, the output
signal START will be deactivated.
Testing the inhibit logic of power swing detection function
The following output signals shall be configured to binary output available: ZOUT, measured
impedance within outer impedance boundary and ZIN, measured impedance within inner
impedance boundary and START, power swing detection.
1. Set
kLdRRv to values that are in accordance with the selectivity plan and the corresponding
operating characteristic is shown in Figure 40.
2. Set
values.
3. Enable the input signal REL1PH to detect the power swing in one of the three phases.
Inhibit START output by the presence of residual current
Preconditions
The input signal I0CHECK, residual current (3I0) detection used to inhibit the start output,
must be configured to the output signal STPE on the FDPSPDIS, FRPSPDIS, ZMFPDIS or
ZMFCPDIS function.
The input signal BLKI02, block inhibit of the start output for subsequent residual current
detection, is connected to FALSE.
1. Create a test sequence such that power swing has been detected, which can be done by
referring to steps 5, 6 and 7 described in section
logic ZMRPSB"
current in all three phases. With this condition, the output signal START will be activated.
2. Create a condition such that residual current is measured (that is, earth fault occurs in
the power system) and its value should be above the value seen during unbalanced
loading condition. It can be done by increasing current in one of the phases without
disturbing faulty phase current.
3. With this condition, I0CHECK connected to STPE output of FDPSPDIS, FRPSPDIS,
ZMFPDIS or ZMFCPDIS function, will be activated and I0CHECK should be activated
before the expiration of timer tR1.
4. By doing this, the output START will be disappeared after a set time delay of
5. If required to block inhibit of start output by the presence of residual current, BLKI02
must be configured to TRUE and thereby, the output signal START will be maintained as
long as the power swing condition exists.
Inhibit START output by the presence of slow power swings
Preconditions
The input signal BLKI01, block inhibit of the start output for slow power swings is connected
to FALSE.
1. Create a test sequence such that the power swing should be detected . This can be done
by referring to steps 5, 6, and 7 described in section
Transformer protection RET670
Commissioning manual
6 and7, and enable the input signal BLOCK. At this condition, the outputs
X1InFw , R1LIn , X1InRv , R1FInFw , R1FInRv , ArgLd , RLdOutFw , RLdOutRv , kLdRFw and
OperationLdCh to On and set timers tP1 , tP2 , tW , tH , tR1 , tR2 and tEF to their default
and inject voltage in one of the phases accordingly by keeping constant
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Testing functionality by secondary injection
GUID-A68BB370-A37A-41EA-86AB-123D01DF9381 v1
GUID-EB691814-D65D-4625-8C63-5E6273E00A29 v1
"Testing the power swing detection
GUID-1BD503DA-6123-4CC3-B8AB-0A0181DFA4A2 v1
"Testing the power swing detection
Section 11
tR1 .
135