ABB RELION REX640, Техническое руководство, Страница: 481 / 1960

Characteristic Value
Voltage
±1.5% of the set value or ±0.002 × U
n
Phase angle:
±2°
DEFHPDEF Current:
±1.5% of the set value or ±0.002 × I
n
(at currents in the range of 0.1…10 × I
n
)
±5.0% of the set value
(at currents in the range of 10…40 × I
n
)
Voltage:
±1.5% of the set value or ±0.002 × U
n
Phase angle:
±2°
Start time
1, 2
Minimum Typical Maximum
DEFHPDEF
I
Fault
= 2 × set
Start
value
42 ms 46 ms 49 ms
DEFLPDEF
I
Fault
= 2 × set Start
value
58 ms 62 ms 66 ms
Reset time Typically 40 ms
Reset ratio Typically 0.96
Retardation time <30 ms
Operate time accuracy in definite time mode
4
±1.0% of the set value or ±20 ms
Operate time accuracy in inverse time mode
±5.0% of the theoretical value or ±20 ms
3
Suppression of harmonics
RMS: No suppression
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
Peak-to-Peak: No suppression
1 Measurement mode = default (depends on stage), current before fault = 0.0 × I
n
, f
n
= 50 Hz,
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
Maximum
Start value = 2.5 × I
n
,
Start value multiples in range of 1.5...20.
1MRS759142 F Protection functions
REX640
Technical Manual
481