Toshiba GR200 Series - (vii) Reset time of DT

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 230 -
energized quantity (I) falls below the threshold setting [OC1], the element operation will
return to its reset stage after the time t(I) calculated in Equation (2.15-2).
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 [TOC1R].
The integration will be reset when the energizing current
does not become larger than [OC1] in [TOC1R].
The integration will be deceased depending on the
[OC1-RTMS-*] reset characteristics.
Setting
[*-Rtimer]=DEP
Stage to element
return
Trip signal
The integration will start again when the energizing current
becomes larger than [OC1] within [TOC1R].
[OC1] threshold
Energizing current
cleared by tripping
Figure 2.15-7 Inverse-time-reset characteristics
(vii) Reset time of DT
In the DT characteristic, the reset time is designed to be instant.