7.3.7
Sensitive directional residual overcurrent and power
protection SDEPSDE
SEMOD175060-3 v5.1.1
Prepare the IED for verification of settings as outlined in section
.
Values of the logical signals for SDEPSDE are available on the local HMI under Main menu/
Tests/Function status/Current/SDEPSDE(67N,IN<->)/SDEPSDE:1. The Signal Monitoring in
PCM600 shows the same signals that are available on the local HMI.
7.3.7.1
Measuring the operate and time limit for set values
Operation mode 3I
0
· cosφ
SEMOD175060-34 v6
Procedure
1.
Set the polarizing voltage to 1.2 ·
UNRel> and the phase angle between voltage and
current to the set characteristic angle (
RCADir), the current lagging the voltage.
Take setting
RCAComp into consideration if not equal to 0.
2.
Measure that the operate current of the set directional element is equal to the
INcosPhi>
setting.
The I Dir (I
0
cos(Angle)) function activates the START and STDIRIN output.
3.
Measure with angles
j
= /- 45° that the measuring element operates when I
0
cos
(
RCADir -
j
) = I
0
cos(+/-45) =
INcosPhi>.
4.
Compare the result with the set value.
Take the set characteristic into consideration, see figure
5.
Measure the operate time of the timer by injecting a current two times the set
INcosPhi>
value and the polarizing voltage 1.2 ·
UNRel>.
( )
0
/ 3
cos
test
Tinv
kSN Sref
I
j
=
×
×
IECEQUATION2402 V1 EN-US
(Equation 1)
6.
Compare the result with the expected value.
The expected value depends on whether definite or inverse time was selected.
7.
Set the polarizing voltage to zero and increase until the boolean output signal UNREL is
activated, which is visible in the Application Configuration in PCM600 when the IED is in
online mode. Compare the voltage with the set value
UNRel>.
8.
Continue to test another function or complete the test by setting the test mode to
Off.
1MRK 505 293-UEN B
Section 7
Testing functionality
Breaker protection REQ650
49
Commissioning manual
© Copyright 2013 ABB. All rights reserved
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