Ashida ADR233B - Page 145

ADR233B
Doc ID : ADR233B/IM/01
Ref ID : ADR233B/IM/PS
Rev No. : 05
Page No. : 145 of 479
Type of curve Standard K factor
α
Factor
Moderately inverse
IEEE
4.850
2
Very inverse
IEEE
21.600
2
Extremely Inverse
IEEE
29.100
2
US Inverse
C08
5.950
2
US ST Inverse
C02
2.261
2
IDMT Reset Characteristic
Start Time
Energising
Quantity > Gs
Start (Pick-up)
Signal
Operated
Signal
Value of
Internal Time
delay counter
(
Intergrator)
Reset Time
Time Delay setting
Disengaging
Time
Reset Time
Operate level of
the integrator
Figure 22: IDMT Reset Characteristic