Toshiba GR200 Series Instruction Manual page 1489

Line differential protection ied
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Rating check: Figure 12.6-2 is a check example for channel#1. Using this
screen, the user should confirmed DEP being set in each CT channel.
AI#1
10:48
AI1_Ch1_Ratio
2000
AI1_Ch1_Rating
DEP
Figure 12.6-2 Rated current checking
Note: Term "DEP" means that a rated current is set by the manufacture in accordance
with the customer's ordering. For more information of ordering, see
Ordering
.
Selection of CT polarity: For example, Figure 12.6-3 shows how change the
CT polarity on a VCT module (AI#1 = VCT#1). Using the cursor by pressing
keys ▲ and ▼ and pressing key ►, go for required setting items.
AC Analog Input
10:48
AI#1
APPL-VCT
Figure 12.6-3 Polarity Change input screen
Note: This screen is a sample. The number of the CTs are dependent upon the
configuration of VCT modules in each IED.
Selection of residual voltage: A residual voltage is obtained by the
computation in three-phase voltages, but it can be obtain directly from a
1/2
+
[►]
+
1/2
>
[►]
>
- 1466 -
AI1_Ch1_Rating
10:48
1/3
DEP
1A
5A
APPL-VCT
10:48
1/2
APPL-Ves2
+
Vs2
Polarity Change
>
[►]
Polarity Change
10:48
1/3
Pol–1CT
+
Positive
Pol–1CT-Ie
+
Positive
Pol–1CT-Iem
Positive
GRL200 (Soft 033 & 037)
6F2S1914 (0.49)
Appendix:
+

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