Toshiba GRD110 Manual page 6

GRD110
IEC/UK Inverse Curves
(Time Muliplier TMS = 1)
1000
100
10
1
0.1
1
Current (Multiple of Setting)
t
Inverse time operate function
Curve Description
IEC Normal Inverse (NI)
IEC Very Inverse (VI)
IEC Extremely Inverse (EI)
UK Long Time Inverse (LTI)
IEEE Moderately Inverse (MI)
IEEE Very Inverse (VI)
IEEE Extremely Inverse (EI)
US CO8 Inverse (I)
US CO2 Short Time Inverse (STI)
User configurable setting
Inverse Time Operate and Reset Curves
100
10
LTI
NI 1
VI
EI
0.1
1
10 100
k
TMS c
I
1
Is
Constants for dependent time curves
Figure 1 - Operate and Reset Characteristics
IEEE/US Inverse Curves
(Time Multiplier TMS = 1)
MI
VI
STI
I
EI
10 100
Current (Multiple of Setting)
t
do
Dependent time reset function
k
0.14 0.02
13.5 1
80 2
120 1
0.0515 0.02 0.114
19.61 2 0.491
28.2 2 0.1217
5.95 2 0.18
0.02394 0.02 0.01694
0.00 – 0.00 – 0.000 –
30.000 5.00 5.000
6
IEEE/US Reset Curves
(Time Multiplier TMS = 1)
1000.00
100.00
EI
VI
10.00
I
MI
STI
1.00
0.1
Current (Multiple of Setting)
kr
RTMS
I
1
Is
C k
r
0 - -
0 - -
0 - -
0 - -
4.85 2
21.6 2
29.1 2
5.95 2
2.261 2
0.000 – 0.00 –
30.000 5.00
1