ABB RELION REX640 Technical Manual page 481

1MRS759142 F
Characteristic
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
4
Operate time accuracy in inverse time mode
Suppression of harmonics
1 Measurement mode = default (depends on stage), current before fault = 0.0 × I
earth-fault current with nominal frequency injected from random phase angle, results based on
statistical distribution of 1000 measurements.
2
Includes the delay of the signal output contact.
4
Start time of the function also included.
3 Start value = 2.5 × I
Maximum
REX640
Technical Manual
DEFHPDEF
1, 2
DEFHPDEF
I = 2 × set
Fault
value
DEFLPDEF
I = 2 × set
Fault
value
Start value multiples in range of 1.5...20.
,
n
Value
Voltage
±1.5% of the set value or ±0.002 × U
Phase angle:
±2°
Current:
±1.5% of the set value or ±0.002 × I
(at currents in the range of 0.1...10 × I
±5.0% of the set value
(at currents in the range of 10...40 × I
Voltage:
±1.5% of the set value or ±0.002 × U
Phase angle:
±2°
Minimum
42 ms
Start
58 ms
Start
Typically 40 ms
Typically 0.96
<30 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20 ms
RMS: No suppression
DFT: -50 dB at f = n × f
Peak-to-Peak: No suppression
Protection functions
n
n
)
n
)
n
n
Typical Maximum
46 ms 49 ms
62 ms 66 ms
, where n = 2, 3, 4, 5,...
n
, f = 50 Hz,
n n
3
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