ABB RELION 620 Series Technical Manual page 780

Section 4
Protection functions
774
I_PEAK_INT_C values are available in monitored data view. The frequency
response of the peak integrated current calculator can be seen in
GUID-81EC4C3E-7E8C-4BDF-9AE3-D4133690CD04 V1 EN
Figure 397: Frequency response of the peak integrated current calculator
Operate level detector
The Operate level detector compares I_PEAK_INT_x value to Start value overload.
If the phase or phases in which I_PEAK_INT_x exceeds the setting matches the Num
of start phases setting, the Operate level detector module activates the Timer 1
module.
Timer 1
Once activated, the Timer 1 module activates the ST_OVLOD output. The operation
time depends on the overload level and Time multiplier. The operation time under
standard characteristics is based on ANSI/IEEE 37.99 and IEC 60871-1
recommendations.
Table 738: Standard Curve characteristics for IDMT Curve
Overload value
1.10
1.15
1.20
1.30
1.40
1.70
2.20
IED operate time(s) with k = 1
43200
1800
300
60
15
1
0.120
1MRS757644 F
Figure 397.
Standard
IEC60871-1
IEC60871-1
IEC60871-1
ANSI/IEEE37.99,IEC60871-1
ANSI/IEEE37.99
ANSI/IEEE37.99
ANSI/IEEE37.99
620 series
Technical Manual