Toshiba GR200 Series - Page 291

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 268 -
Figure 2.17-4 Inverse-time-reset characteristics curves
Figure 2.17-5 illustrates that an integrating value will be influenced dependent on the
DEP or DEF setting. An energized quantity (I), where I is greater than a threshold setting
[OCN1], will make an integrating value, which can determine how the element operates. If the
energized quantity (I) falls below the threshold setting [OCN1], the element operation will
return to its reset stage after the time t(I) calculated in Equation (2.17-2).
Energizing current
Pickup threshold in relay
Measuring quantity
0 A
Time →
Inverse-time-reset characteristic
Stage to element
return
Integrator
Trip signal
Definite-time-reset characteristic
Integrator
Setting
[*-Rtimer]=DEF
Reset time
Integration will be kept in timer [TOCN1R].
The integration will be reset when the energizing current
does not become larger than [OCN1] in [TOCN1R].
The integration will be deceased depending on the
[OCN1-RTMS-*] reset characteristics.
Setting
[*-Rtimer]=DEP
Stage to element
return
Trip signal
The integration will start again when the energizing current
becomes larger than [OCN1] within [TOCN1R].
[OCN1] threshold
Energizing current
cleared by tripping
Figure 2.17-5 Inverse-time-reset characteristics