Step no.
Changes after step 2
Expected output
WARNING Signal Test
4-g
Inject U
TapL1
= 30.00 V in secondary at
rated frequency
•
WARNING and WRNL1
signals should become HIGH
after a time delay given by the
setting
tDefWrn
•
PUDIFL1 should show 5.61 %
ALARM Signal Test
4-h
Inject U
Tap1
= 29.00 V in secondary at
rated frequency
•
ALARM and ALML1 signals
should become HIGH after a
time delay given by the setting
tDefAlm
•
PUDIFL1 should show 8.81%
TRIP Signal Test
4-i
Inject U
TapL1
= 28 V in secondary at rated
frequency
•
START and STL1 signals
should become HIGH after a
time delay given by the setting
tDefTrip
•
TRIP and TRL1 signals should
become HIGH, if
BlockTrip
is
set to
Trip enabled
•
PUDIFL1 should show 12.01%
- Steps 4–g, 4–h and 4–I can also be done phase wise.
* - UBase considered as 400 kV and VT ratio as 400kV/110V
The voltage inputs U
L1
, U
L2
, and U
L3
refer to the bus voltages and U
TapL1
refers to the tap voltage of
phase L1.
* * - This step should be done only during Factory Acceptance Test (FAT). At field, the testing should be
done with the stored field values.
To calculate PUDIFL1 in steps 4-g, 4-h and 4-i, use the following equations:
1
1
1
1
1
L
N
TapL
N
UDIFL
U
U
U
U
USEDURATL
IECEQUATION19128 V1 EN-US
(Equation 32)
1
1
100
3
UDIFL
PUDIFL
UBase
=
´
IECEQUATION19129 V1 EN-US
(Equation 33)
Verifying the function when neutral VT is unavailable
GUID-56FBF2D2-74FF-4091-9B2B-14299F50670D v1
If the neutral VT is not available, then the setting
NeutVoltMeas
is set to
Not available
.
1.
Set the following parameters:
•
Operation
=
ON
•
tDefWrn
=
5 s
;
tDefAlm
=
5 s
;
tDefTrip
=
5 s
•
SCBGndType
=
Ungrounded
•
NeutVoltMeas
=
Not available
•
Udif>
=
10% UB
•
UdifAlm>
=
8% UB
1MRK 511 403-UEN Rev. L
Section 11
Testing functionality by secondary injection
Bay control REC670
139
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
Содержание REC670
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