ABB Relion 670 Series Commissioning Manual page 140
Transformer protection
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Also See for Relion 670 Series:
- Technical manual (1432 pages) ,
- Technical reference manual (1232 pages) ,
- Applications manual (944 pages)
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Section 11
Testing functionality by secondary injection
IEC18000100 V1 EN-US
Figure 40: Proposed test points to detect power swing conditions
Where,
φ =
5.
Inject voltage in one of the three phases in accordance with the test point P1 by keeping
constant current in three phases throughout testing and maintaining rated voltage for
other two phases.
6.
Vary the faulty phase voltage to achieve the impedance at the test point P2. At this point,
observe that the output ZOUT is activated and then continue to inject for a duration
greater than
7.
Inject the faulty phase voltage to achieve the impedance at the test point P3. At this
point, observe that the outputs ZIN and START are activated. It indicates that power
swing has been detected.
8.
Inject the faulty phase voltage in accordance with the test point P1.
9.
At this condition, the outputs ZIN and ZOUT get deactivated and START signal will be
maintained for a set duration of
10.
To detect consecutive power swings, repeat steps 5, 6,
output START will be activated.
11.
Repeat step
activated.
12.
Repeat step
13.
At this condition, it will be detected as consecutive power swing and the output signal
START will be maintained.
14.
Repeat step
will be disappeared after set duration of
15.
Repeat the above steps to test and detect power swing condition in at least two phases
by enabling input REL2PH.
16.
By enabling the input BLK1H, operation mode for power swing detection in any phase will
be blocked.
134
X1OutFw
X1InFw
X1InRv
X1OutRv
-1
tan
(
X1InFw / R1LIn )
tP1 .
6
and inject before the expiration of timer
7
after a set duration of
8
and the outputs ZOUT and ZIN get deactivated. The output signal START
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ZL
X
P3
P2
RLdInRv
RLdInFw
RLdOutFw
RLdOutRv
tH .
7
tW . The output ZOUT will be
tP2 . The output ZIN will be activated.
tH from the instance of step 13.
1MRK 504 165-UEN E
j
R
P1
IEC18000100-2-en.vsdx
and 8. With this condition, the
Transformer protection RET670
Commissioning manual
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