6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 199 -
defines the reset time for the inverse-time-reset characteristic (ref. IEC 60255-151):
𝑡(I) = 𝑅𝑇𝑀𝑆 × [
kr
1 − (I I
s
⁄ )
β
]
(2.7-2)
where:
t = time required for the element to reset fully after complete operation (seconds),
I = energizing current (amperes),
Is = threshold setting (amperes),
kr = time required to reset fully after complete operation when the energizing current is
zero
RTMS = time multiplier setting for resetting.
β = constants defining curve.
For setting RTMS for the IEEE standard, the user can use setting [
OCN1-RTMS-IEEE
]
(incidentally, the default value is 1.000). Similarly, settings [
OCN1-RTMS-US
] and [
OCN1-
RTMS-ORG
] are provided for the US standard and the original, respectively (For more
information w.r.t the values for kr and β, see Table 2.7-3; Figure 2.7-4 shows the characteristic
curves).
Table 2.7-3 Constants for inverse-time-reset characteristics
Curve Type
IEC 60255-151
Curve Description
kr
(sec)
β
A
IEC Normal Inverse (IEC-NI‡)
N/A
N/A
B
IEC Very Inverse (IEC-VI‡)
N/A
N/A
C
IEC Extremely Inverse (IEC-EI‡)
N/A
N/A
-
UK Long Time Inverse (UK-LTI‡)
N/A
N/A
D
IEEE Moderately Inverse (IEEE-MI)
4.85
2
E
IEEE Very Inverse (IEEE-VI)
21.6
2
F
IEEE Extremely Inverse (IEEE-EI)
29.1
2
-
US CO8 inverse (US-CO8)
5.95
2
-
US CO2 short time inverse (US-CO2)
2.261
2
†Note: To select the inverse-time-reset characteristic, set [
OCN1-Rtimer
]=
DEP
.
Conversely set [
OCN1-Rtimer
]=
DEF
to select definite-time-reset characteristic,.
Note: For the setting [
OCN1-Rtimer
]=
DEP
(inverse-time-reset), the integrated value will
be reduced in accordance to the magnitude of an energized current, when the
energized current is smaller than the setting [
OCN1
]. The reducing degree will be
determined with the reset curve characteristics defined in the standards.
Note: For the setting [
OCN1-Rtimer
]=
DEF
(definite-time-reset), the integrated value
shall be zero when an energized current is smaller than the setting [
OCN1
], when
the small energized current is continued for timer setting [
TOCN1R
]. The
integrated value will not be zero when the energized current does not flow small
for the setting [
TOCN1R
].
DEF
is allowed to set in the IEEE, US, and ORG.
DEF
is
set unconditionally in the IEC and UK (see Table 2.7-4).
Содержание GR 200 Series
Страница 1047: ...6F2S1915 0 46 GRZ200 Soft 031 032 1026 Figure 8 3 4 Screen shot from GR TIEMS ...
Страница 1354: ...6F2S1915 0 46 GRZ200 Soft 031 032 1333 Appendix 1 Signal list for common function ...
Страница 1369: ...6F2S1915 0 46 GRZ200 Soft 031 032 1348 Unit mm Panel cut out for 1 2 case size Figure 2 2 3 Panel cutout figure 1 2 size case ...
Страница 1410: ...6F2S1915 0 46 GRZ200 Soft 031 032 1389 This page is intentionally blank ...
Страница 1480: ...6F2S1915 0 46 GRZ200 Soft 031 032 1459 Appendix 6 Ordering ...
Страница 1497: ...6F2S1915 0 46 GRZ200 Soft 031 032 1476 Appendix 7 Technical data ...
Страница 1518: ...6F2S1915 0 46 GRZ200 Soft 031 032 1497 Appendix 8 Manufacture setting ...
Страница 1520: ...6F2S1915 0 46 GRZ200 Soft 031 032 1499 Appendix 9 Matrix between VCT terminals and relay applications ...
Страница 1523: ...6F2S1915 0 46 GRZ200 Soft 031 032 1502 Appendix 10 CT requirement ...
Страница 1531: ...6F2S1915 0 46 GRZ200 Soft 031 032 1510 Appendix 12 Engineering exercise ...
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