ABB Relion 670 series - Page 165

Name Values (Range) Unit Step Default Description
OpenCTEnable Disabled
Enabled
- - Enabled Open CTEnable Off/On
tOCTAlarmDelay 0.100 - 10.000 s 0.001 1.000 Open CT: time in s to alarm after an open CT
is detected
tOCTResetDelay 0.100 - 10.000 s 0.001 0.250 Reset delay in s. After delay, diff. function is
activated
Table 81: LT6CPDIF (87LT) Non group settings (basic)
Name Values (Range) Unit Step Default Description
NoOfTerminals 2
3
4
5
6
- - 2 Number of current terminals of the protected
circuit
Chan2IsLocal No
Yes
- - No 2-nd local current connected to input channel
2, Yes/ No
IBase 50.0 - 9999.9 A 0.1 3000.0 Base (reference) current of the differential
protection
ZerSeqCurSubtr Disabled
Enabled
- - Disabled Off/On for elimination of zero seq. from diff.
and bias curr
TraAOnInpCh No Transf A
1
2
3
4
5
6
- - No Transf A Power transformer A applied on input channel
X
RatVoltW1TraA 1.0 - 9999.9 kV 0.1 130.0 Transformer A rated voltage (kV) on winding
1 (HV winding)
RatVoltW2TraA 1.0 - 9999.9 kV 0.1 130.0 Transformer A rated voltage (kV) on winding
2 (LV winding)
ClockNumTransA 0 [0 deg]
1 [30 deg lag]
2 [60 deg lag]
3 [90 deg lag]
4 [120 deg lag]
5 [150 deg lag]
6 [180 deg lag]
7 [210 deg lag]
8 [240 deg lag]
9 [270 deg lag]
10 [300 deg lag]
11 [330 deg lag]
- - 0 [0 deg] Transf. A phase shift in multiples of 30 deg, 5
for 150 deg
ZerSeqPassTraA No
Yes
- - No Yes/No for capability of transf A to transform
zero seq curr
Table continues on next page
1MRK505222-UUS C Section 5
Differential protection
159
Technical reference manual