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Section 10
Testing functionality by secondary injection
10.4.11.2
10.4.12
124
Imin > 0.10 IBase
Umax < 0.92 UBase
0.2 £ f(Ucos) £ 8Hz
d ³ StartAngle
Z cross line ZA - ZC
Z cross line ZC - ZB
N1Limit
d £ TripAngle
N2Limit
IEC07000100 V2 EN
Figure 30:
Logic diagram of the pole slip protection PSPPPAM
Completing the test
Continue to test another function or end the test by changing the TestMode setting to
Off. Restore connections and settings to their original values, if they were changed for
testing purposes.
Out-of-step protection OOSPPAM
The out-of-step protection OOSPPAM function in the IED can be used for both
generator protection and as well for line protection applications.
The main purpose of the OOSPPAM function is to detect, evaluate, and take the
required action during pole slipping occurrences in the power system.
The OOSPPAM function detects pole slip conditions and trips the generator as fast as
possible, after the first pole-slip if the center of oscillation is found to be in zone 1,
which normally includes the generator and its step-up power transformer. If the center
of oscillation is found to be further out in the power system, in zone 2, more than one
pole-slip is usually allowed before the generator-transformer unit is disconnected. A
parameter setting is available to take into account the circuit breaker opening time. If
there are several out-of-step relays in the power system, then the one which finds the
center of oscillation in its zone 1 should operate first.
AND
AND
AND
AND
Counter
a
b a ³ b
Counter
a
b a ³ b
Line distance protection REL670 2.1 IEC
1MRK 506 355-UEN A
START
ZONE1
ZONE2
TRIP1
AND
TRIP
OR
TRIP2
AND
IEC07000100_2_en.vsd
Commissioning manual
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