Basler Electric BE1-11t - Manual (Page 481)

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Table 208. Characteristic Curve Cross-Reference
Curve Curve Name Similar To
S1 CO Short Inverse ABB CO-2
S2 IAC Short Inverse GE IAC-55
A Standard Inverse Refer to BS 142
A1 IEC Inverse Refer to IEC 60255-151 Ed. 1
I1 CO Inverse Time ABB CO-8
I2 IAC Inverse Time GE IAC-51
M CO Moderately Inverse ABB CO-7
D1 IEEE Moderately Inverse Refer to IEC 60255-151 Ed. 1
L1 CO Long Inverse ABB CO-5
L2 IAC Long Inverse GE IAC-66
G Long Time Inverse (I 2 t) Refer to BS 142
V1 CO Very Inverse ABB CO-9
V2 IAC Very Inverse GE IAC-53
B Very Inverse (I 2 t) Refer to BS 142
B1 IEC Very Inverse Refer to IEC 60255-151 Ed. 1
E3 IEEE Very Inverse Refer to IEC 60255-151 Ed. 1
E1 CO Extremely Inverse ABB CO-11
E2 IAC Extremely Inverse GE IAC-77
C Extremely Inverse (I
2
t) Refer to BS 142
C1 IEC Extremely Inverse Refer to IEC 60255-151 Ed. 1
F1 IEEE Extremely Inverse Refer to IEC 60255-151 Ed. 1
D CO Definite Time ABB CO-6
F Fixed Time n/a
46 K Factor n/a
P User Programmable n/a
T1, T2, T3, T4 User Tables n/a
Time Dial Setting Cross-Reference
Although the time characteristic curve shapes have been optimized for each BE1-11t, time dial settings of
Basler Electric protection systems are not identical to the settings of electromechanical induction disk
overcurrent relays. Table 209 helps you convert the time dial settings of induction disk relays to the
equivalent setting for Basler Electric protection systems. Enter time dial settings using BESTCOMSPlus.
For more information, refer to the
Inverse Overcurrent (51) Protection chapter.
Using Table 209
Cross-reference table values were obtained by inspection of published electromechanical time current
characteristic curves. The time delay for a current of five times tap was entered into the time dial
calculator function for each time dial setting. The equivalent Basler Electric time dial setting was then
entered into the cross-reference table.
If your electromechanical relay time dial setting is between the values provided in the table, it will be
necessary to estimate the correct intermediate value between the electromechanical setting and the
Basler Electric setting.
BE1-11t Time Curve Characteristics