For phase-to-phase measurement:
U
UBase
VT
VTprim
1
100
<
×
×
sec
IECEQUATION2431 V1 EN-US
(Equation 21)
5.
Increase the measured voltage to rated load conditions.
6.
Check that the START signal resets.
7.
Instantaneously decrease the voltage in one phase to a value about 20% lower than the
measured operate value.
8.
Measure the time delay for the TRIP signal, and compare it with the set value.
9.
Check the inverse time delay by injecting a voltage corresponding to 0.8 × U1<.
For example, if the inverse time curve A is selected, the trip signals TR1 and TRIP
operate after a time corresponding to the equation:
t s
k
U
U
( )
=
−
<
1
1
1
IECEQUATION2428 V1 EN-US
(Equation 22)
where:
t(s)
Operate time in seconds
k1
Settable time multiplier of the function for step 1
U
Measured voltage
U1<
Set start voltage for step 1
For example, if the measured voltage jumps from the rated value to 0.8 times the set start
voltage level and time multiplier k1 is set to 0.05 s (default value), then the TR1 and TRIP
signals operate at a time equal to 0.250 s ± tolerance.
10.
The test above can be repeated to check the inverse time characteristic at different voltage
levels.
11.
Repeat the above described steps for Step 2 of the function.
Extended testing
M13796-35 v8
The tests above can be repeated for
2 out of 3
and for
3 out of 3
operation mode.
11.5.1.2
Completing the test
M13796-25 v5
Continue to test another function or end the test by changing the
TESTMODE
setting to
Off
. Restore
connections and settings to the original values, if changed for testing purposes.
11.5.2
Two step overvoltage protection OV2PTOV
M13806-2 v6
Prepare the IED for verification of settings as outlined in section
11.5.2.1
Verifying the settings
M13806-9 v2
Verification of single-phase voltage and time delay to operate for Step 1
M13806-50 v10
1MRK 511 403-UEN Rev. L
Section 11
Testing functionality by secondary injection
Bay control REC670
121
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
Содержание REC670
Страница 1: ...Relion 670 SERIES Bay control REC670 Version 2 2 IEC Commissioning manual ...
Страница 2: ......
Страница 28: ...22 ...
Страница 54: ...48 ...
Страница 60: ...54 ...
Страница 66: ...60 ...
Страница 90: ...84 ...
Страница 212: ...206 ...
Страница 218: ...212 ...
Страница 232: ...226 ...
Страница 240: ...234 ...
Страница 241: ...235 ...