ABB REG316 4 Series Operating Instructions Manual page 642

ABB Switzerland Ltd
Utility Automation
Technical Data
Functions
Numerical generator protection
Table 10: Thermal overload function (49)
· Thermal image for the 1st. order model.
· Single or three-phase measurement with detection of maximum phase value.
Settings:
Base current I
B
Alarm stage
Tripping stage
Thermal time constant
Accuracy of the thermal image
Table 11: Definite time current function (51DT)
· Over and undercurrent detection.
· Single or three-phase measurement with detection of the highest, respectively lowest phase current.
· 2nd. harmonic restraint for high inrush currents.
Settings:
Pick-up current
Delay
Accuracy of the pick-up setting (at f
Reset ratio
overcurrent
undercurrent
Max. operating time without intentional delay
Inrush restraint
pick-up setting
reset ratio
Table 12: Definite time voltage function (27/59)
· Over and undervoltage detection
· Single or three-phase measurement with detection of the highest, respectively lowest phase voltage
Also applied for detection of:
· stator ground faults (95%)
· rotor ground faults (requires external measuring bridge YWX111 and coupling capacitors)
· inter-turn faults
Settings:
Pick-up voltage
Delay
Accuracy of the pick-up setting (at f
Reset ratio (U ³0.1 U
)
N
overvoltage
undervoltage
Max. operating time without intentional delay
0.5 to 2.5 I in steps of 0.01 I
N
50 to 200% J in steps of 1% J
N
50 to 200% J in steps of 1% J
N
2 to 500 min in steps of 0.1 min
±5% J
(at f ) with protection c.t.'s
N N
±2% J
(at f ) with core-balance c.t.'s
N N
0.02 to 20 I in steps of 0.01 I
N
0.02 to 60 s in steps of 0.01 s
) ±5% or ±0.02 I
N N
>94 % (for max. function)
<106 % (for min. function)
60 ms
optional
0.1 I /I
2h 1h
0.8
0.01 to 2.0 U in steps of 0.002 U
N
0.02 to 60 s in steps of 0.01 s
) ±2% or ±0.005 U
N
>96% (for max. function)
<104% (for min. function)
60 ms
REG316*4
1MRK502004-Ben
N
N
N
N
N
N
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