Toshiba GR200 Series Instruction Manual page 1218

Line differential protection ied
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Setting bands for the operation
(iii)
As illustrated in Figure 9.2-7, with regard to the entering current the user can define the upper
limit and lower limit using the setting [ISD] in %. The limit-size of the SD feature is calculated
based on the amount of the entering current. Table 9.2-4 shows respective settings for the
power quantities.
Table 9.2-4 SD settings for respective quantities
Quantities
Voltage
Current
Active/Reactive/Apparent power
Power factor
Frequencty
Watt-hour/var-hour
Phase
Difference of voltages†
†Note: The values are derived in the VCHK function. For more information, see Chapter
Relay application: Voltage check for autoreclose function
Figure 9.2-8 Metering setting in the setting screen
Note: For the operation of the menu, see Chapter
Units for
SD settings
settings
%
VSD
%
ISD
P/Q/SSD
PFSD
%
FSD
Wh/varhSD
Degree
PhaseSD
%
dVSD
Metering
10:48
1/8
ISD
+
5.00 %
VSD
+
0.60 %
dVSD
+
0.60 %
- 1195 -
6F2S1914 (0.49)
Setting ranges
0.00% to 50.00%
0.00% to 50.00%
0.00% to 50.00%
0.00 to 1.00
0.00% to 50.00%
0.0 to 999.9
0.0 deg. to 90 deg.
0.00% to 50.00%
.
User interface: Setting sub-menu
GRL200 (Soft 033 & 037)
.

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