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Description
Over- and undervoltage detection
Single or three-phase measurement with detection of the highest, respectively lowest phase voltage
4 independent parameter sets
ABB 216NG62A HESG441634R1/K generator protection digital control unit
Table 28 Definite time over- and undervoltage protection (59/27)
Over- and undervoltage detection
Single or three-phase measurement with detection of the highest, respectively lowest phase voltage
4 independent parameter sets
Settings:
Pick-up voltage 0.01 to 2.0 UN in steps of 0.01 UN
Delay 0.02 to 60 s in steps of 0.01 s
Accuracy of the pick-up setting (at fN) ±2% or ±0.005 UN
Reset ratio (U 0.1 UN)
overvoltage
undervoltage
>96% (for max. function)
<104% (for min. function)
Max. operating time without intentional delay 60 ms
Table 29 Inverse time earth fault overcurrent protection (51N)
Neutral current measurement (derived externally or internally)
4 independent parameter sets
Inverse time characteristic
(acc. to B.S. 142, IEC 60255-3 with extended setting
range)
normal inverse
very inverse
extremely inverse
long time inverse
t = k1 / ((I/IB)
C - 1)
c = 0.02
c = 1
c = 2
c = 1
or RXIDG characteristic t = 5.8 - 1.35 · In (I/IB)
Settings:
Number of phases 1 or 3
Base current IB 0.04 to 2.5 IN in steps of 0.01 IN
Pick-up current Istart 1 to 4 IB in steps of 0.01 IB
Min. time setting tmin 0 to 10 s in steps of 0.1 s
k1 setting 0.01 to 200 s in steps of 0.01 s
Accuracy classes for the operating time
according to B.S. 142, IEC 60255-3
RXIDG characteristic
E 5.0
±4% (1 - I/80 IB)
Reset ratio 95%
Table 30 Directional overcurrent definite time protection (67)
Directional overcurrent protection with detection of power flow direction
Back-up protection
4 independent parameter sets
Three-phase measurement
Suppression of DC and HF components
Definite time characteristic
Voltage memory for near faults
Selectable response when power direction no longer valid (trip or block)
Settings:
Current 0.02 to 20 IN in steps of 0.01 IN
Angle -180° to +180° in steps of 15°
Delay 0.02 to 60 s in steps of 0.01 s
Wait time 0.02 to 20 s in steps of 0.01 s
Memory duration 0.2 to 60 s in steps of 0.01 s
Accuracies:
Measuring accuracies are defined by:
Frequency range 0.9…1.05 fN
Sinusoidal voltage including 3., 5., 7. and 9. harmonic
Accuracy of pick-up value
Reset ratio
Accuracy of angle measurement (at 0.97…1.03 fN)
±5%
95%
±5°
Voltage input range
Voltage memory range
Accuracy of angle measurement at voltage memory
Frequency dependence of angle measurement at
voltage memory
Response time without delay
0.005 to 2 UN
<0.005 UN
±20°
±0.5°/Hz
60 ms
Table 31 Directional overcurrent inverse time protection (67)
Directional overcurrent protection with detection of power flow direction
Back-up for distance protection
4 independent parameter sets
Three-phase measurement
Suppression of DC and HF components
Inverse time characteristic
Voltage memory for near faults
Selectable response when power direction no longer valid (trip or block)
Settings:
Current 1 to 4 IN in steps of 0.01 IN
Angle -180° to +180° in steps of 15°
Inverse time characteristic
(acc. to B.S. 142, IEC 60255-3 with extended setting
range)
normal inverse
very inverse
extremely inverse
long time inverse
t = k1 / ((I/IB)
C - 1)
c = 0.02
c = 1
c = 2
c = 1
t-min 0 to 20 in steps of 0.01
IB-value 0.04 to 2.5 IN in steps of 0.01 IN
Wait time 0.02 to 20 s in steps of 0.01 s
Memory duration 0.2 to 60 s in steps of 0.01 s
Accuracies:
Measuring accuracies are defined by:
Frequency range 0.9…1.05 fN
Accuracy of pick-up value
Reset ratio
Accuracy of angle measurement (at 0.97…1.03 fN)
±5%
95%
±5°
Voltage input range
Voltage memory range
Accuracy of angle measurement at voltage memory
Frequency dependence of angle measurement at
voltage memory
Response time without delay
0.005 to 2 UN
<0.005 UN
±20°
±0.5°/Hz
60 ms
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