Toshiba GR-200-5 Instruction Manual page 67

Figure 2.2-4 Inverse-time-reset characteristics curves
Figure 2.2-5 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
[EF1], will make an integrating value, which can determine how the element operates. If the
energized quantity (I) falls below the threshold setting [EF1], the element operation will return
to its reset stage after the time t(I) calculated in Equation (2.2-2).
Energizing current
Pickup threshold in relay
Measuring quantity
Inverse-time-reset characteristic
Stage to element
return
Setting
[*-Rtimer]=DEP
Integrator
Trip signal
Definite-time-reset characteristic
Stage to element
return
Setting
[*-Rtimer]=DEF
Integrator
Trip signal
Integration will be kept in timer [TEF1R].
The integration will start again when the energizing current
becomes larger than [EF1] within [TEF1R].
Figure 2.2-5 Inverse-time-reset characteristics
The integration will be deceased depending on the
[EF1-RTMS-*] reset characteristics.
Reset time
The integration will be reset when the energizing current
does not become larger than [EF1] in [TEF1R].
- 47 -
6F2T0207 (0.01)
Time →
Energizing current
cleared by tripping
[EF1] threshold
0 A
GRE200 (5,6)