Toshiba GR 200 Series, Инструкция по эксплуатации

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6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 201 -
(vi)
Reset time of DT
In the DT characteristic, the reset time is designed to be instant.
(vii)
Summary of OCN operation
Table 2.7-4 shows a summary for OCN operation. Note that
DEF
will be set unconditionally in
IEC-NI, VI, EI and UK-LTI characteristics (†).
Table 2.7-4 Type and standard board in the OCN1 (A tick represents a selectable function)
Characteristics
DT
IDMT
IEC-NI IEC-VI IEC-EI UK-LTI IEEE-MI IEEE-VI IEEE-EI US-CO2 US-CO8 Original
Scheme
sw
itch
[O
C
N1
-T
imer
]
DT

IEC-NI
✓
IEC-VI
✓
IEC-EI
✓
UK LTI
✓
IEEE-MI
✓
IEEE-VI
✓
IEEE-EI
✓
US-CO2
✓
US-CO8
✓
Original
✓
Scheme
sw
itch
[O
C
N1
-Rt
imer
]
DEF
N.A
✓
†
✓
†
✓
†
✓
†
✓ ✓ ✓ ✓ ✓ ✓
DEP
N.A
✓
N.A
✓
N.A
✓
N.A
✓
N.A
✓
N.A
✓
2.7.3
Threshold value
The value of threshold current at which the OCN (I2) element will pick-up is configured by
settings; the setting [
OCN1
] 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
OCN 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
Technical description:
Transformer module for AC analogue input
).
2.7.4
Reset Ratio
The ratio of the threshold current for pick-up to reset is applied using a setting; for example,
the ratio for the OCN1 element is set using the setting [
OCN1-DPR
]. The reset ratios for the
other OCN elements are also provided.
2.7.5
Miscellaneous functions