Step No.
Changes after step 4
Expected Output
WARNING TEST
5-a
Retain the constant voltages* of
U
L1
= 63.5
∠
0° V, U
L2
= 63.5
∠
240°
V, and U
L3
= 63.5
∠
120° V in
secondary at rated frequency.
Change U
N
= 3.0
∠
0° V in
secondary at rated frequency
WARNING signal should become HIGH after the
set time delay.
ALARM TEST
5-b
Change U
N
= 4.0
∠
0° V in
secondary at rated frequency
ALARM signal should become HIGH after the set
time delay.
START and TRIP TEST
5-c
Change U
N
= 6.0
∠
0° V in
secondary at rated frequency
START signal should become HIGH.
TRIP signal should become HIGH after the set time
delay.
* - VT ratios of the phase voltages and neutral voltages are considered as 400 kV/110 V. The value
UBase is considered as 110 V.
The voltage inputs U
L1
, U
L2
, and U
L3
refer to bus voltages and U
N
refers to the neutral voltage input.
11.6.4.2
Completing the test
GUID-08826C79-B8D8-471B-AD82-906A999ED095 v1
Continue to test another function or end the test by navigating to
Main menu /Test /IED test mode /
TESTMODE:1
and change the
IEDTestMode
setting to
Off
. Restore connections and settings to their
original values, if they were changed for testing purposes.
11.7
Frequency protection
SEMOD53547-1 v1
11.7.1
Underfrequency protection SAPTUF
M16289-2 v7
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to verify settings"
11.7.1.1
Verifying the settings
M16289-15 v3
Verification of START value and time delay to operate
M16289-17 v7
1.
Check that the IED settings are appropriate, for example the start value and the time delay.
2.
Supply the IED with three-phase voltages at their rated values and initial frequency.
The initial frequency is calculated using Equation
.
0.02
/ 0.04
0.04
r
StartFrequency
floor f
StartFrequency
IECEQUATION16059 V1 EN-US
(Equation 36)
3.
Slowly decrease the voltage frequency by steps of 40 mHz until the START signal appears;
during each step apply the voltage signal for a time that is either at least 10% longer than
(
tDelay
+100ms) or a suitable time to monitor the function.
4.
Note the frequency value at which the START signal appears and compare it with the set value
StartFrequency
.
5.
Increase the frequency until its rated value is reached.
6.
Check that the START signal resets.
1MRK 511 403-UEN Rev. L
Section 11
Testing functionality by secondary injection
Bay control REC670
143
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
Содержание REC670
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