ABB RED670 - Measuring the Operate and Time Limit for Set Values

Values of the logical signals belonging to the sensitive directional residual
overcurrent and power protection are available on the local HMI under Main
menu/Test/Function status
/Current protection/SensDirResOvCurr(67N,IN>)/
SDEPSDE(67N,IN>):x
11.5.6.1 Measuring the operate and time limit for set values
SEMOD175060-12 v2
Operation mode 3I
0
· cosφ
SEMOD175060-34 v9
Procedure
1. Set the polarizing voltage to 1.2 · UNRel> and set the phase angle between
voltage and current to the set characteristic angle (RCADir). Note that the the
current lagging the voltage.
Take setting RCAComp into consideration if not equal to 0.
2. Inject current until the function picks up, and make sure that the operate
current of the set directional element is equal to the INcosPhi> setting.
The I Dir (3I
0
· cosφ) function activates the START and STDIRIN output.
3. Assume that φ´ is the phase angle between injected voltage (3U
0
) and current
(3I
0
) i.e. φ´ = RCADir-φ. Change φ´ to for example 45 degrees. Increase the
injected current until the function operates.
4. Compare the result with the set value and make sure that the new injected 3I
0
· cos φ is equal to the setting INcosPhi>..
Take the set characteristic into consideration, see Figure
43 and Figure 44.
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 0
cos3 3
test test
kSN Sref
Tinv
I U
j
×
=
× ×
IECEQUATION2402 V2 EN-US (Equation 80)
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.
Section 11 1MRK 505 378-UEN A
Testing functionality by secondary injection
178 Line differential protection RED670 2.2 IEC
Commissioning manual