Basler BE1-11g Instruction Manual page 617

9424200994 Rev U
Curve
S2
A
A1
I1
I2
M
D1
L1
L2
G
V1
V2
B
B1
E3
E1
E2
C
C1
F1
D
F
46
P
T1, T2, T3, T4
Time Dial Setting Cross-Reference
Although the time characteristic curve shapes have been optimized for each BE1-11g, time dial settings
of Basler Electric protection systems are not identical to the settings of electromechanical induction disk
overcurrent relays. Table 258 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 258
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.
Basler Electric protection systems have a maximum time dial setting of 9.9. The Basler Electric equivalent
time dial setting for the electromechanical maximum setting is provided in the cross-reference table even
if it exceeds 9.9. This allows interpolation as noted above.
BE1-11g
Curve Name
IAC Short Inverse
Standard Inverse
IEC Inverse
CO Inverse Time
IAC Inverse Time
CO Moderately Inverse
IEEE Moderately Inverse
CO Long Inverse
IAC Long Inverse
2
Long Time Inverse (I t)
CO Very Inverse
IAC Very Inverse
2
Very Inverse (I t)
IEC Very Inverse
IEEE Very Inverse
CO Extremely Inverse
IAC Extremely Inverse
2
Extremely Inverse (I t)
IEC Extremely Inverse
IEEE Extremely Inverse
CO Definite Time
Fixed Time
K Factor
User Programmable
User Tables
Similar To
GE IAC-55
Refer to BS 142
Refer to IEC 60255-151 Ed. 1
ABB CO-8
GE IAC-51
ABB CO-7
Refer to IEC 60255-151 Ed. 1
ABB CO-5
GE IAC-66
Refer to BS 142
ABB CO-9
GE IAC-53
Refer to BS 142
Refer to IEC 60255-151 Ed. 1
Refer to IEC 60255-151 Ed. 1
ABB CO-11
GE IAC-77
Refer to BS 142
Refer to IEC 60255-151 Ed. 1
Refer to IEC 60255-151 Ed. 1
ABB CO-6
n/a
n/a
n/a
n/a
Time Curve Characteristics
605