Toshiba GR200 Series Instruction Manual page 274

Line differential protection ied
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Reset time of DT
(vi)
In the DT characteristic, the reset time is designed to be instant.
Summary of EF operation
(vii)
Table 2.16-4 shows a summary for EF operation. Note that DEF will be set unconditionally in
IEC-NI, VI, EI and UK-LTI characteristics (†).
Table 2.16-4 Type and standard board in the EF (A tick represents a selectable function)
DT
Characteristics
DT
IEC-NI
IEC-VI
IEC-EI
UK LTI
IEEE-MI
IEEE-VI
IEEE-EI
US-CO2
US-CO8
Original
N.A
DEF
N.A
N.A
N.A
DEP
N.A
N.A
N.A
Threshold level for operation
2.16.3
The value of threshold current at which the EF (I
setting; the setting [EF1] is provided for both the IDMT and the DT characteristic. Note that
the settings of the threshold levels are allowed to have distinct values in the respective EF
elements. A rating current for the input is defined either 1A or 5A; the input rating is defined
on a VCT. (For more information about the VCT, see Chapter
Transformer module for AC analogue input
Reset Ratio
2.16.4
The ratio of the threshold current for pick-up to reset is applied using a setting; for example,
the ratio for the EF1 element is set using the setting [EF1-DPR]. The reset ratios for the other
EF elements are also provided.
Miscellaneous functions
2.16.5
IEC-NI
IEC-VI
IEC-EI
UK-LTI
✓ †
✓ †
✓ †
✓ †
- 251 -
IDMT
IEEE-MI
IEEE-VI
IEEE-EI
) element will pick-up is configured by a
EF
).
6F2S1914 (0.49)
US-CO2
US-CO8
Technical description:
GRL200 (Soft 033 & 037)
Original

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