ABB RELION REF615R, Technical Manual

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Parameter Values (Range) Unit Step Default Description
Curve parameter C 0.02...2.00 2.00 Parameter C for customer programmable
curve
Curve parameter D 0.46...30.00 29.10 Parameter D for customer programmable
curve
Curve parameter E 0.0...1.0 1.0 Parameter E for customer programmable
curve
4.1.2.9 Monitored data
Table 93: 51LT Monitored data
Name Type Values (Range) Unit Description
PICKUP_DUR FLOAT32 0.00...100.00 % Ratio of pickup time / trip time
51LT Enum 1=Enabled
2=blocked
3=test
4=test/blocked
5=Disabled
Status
Table 94: 51LT Technical data
Characteristic Value
Operation accuracy Depending on the frequency of the current
measured: f
n
±2 Hz
±1.5% of the set value or ±0.002 x In
(at currents in the range of 0.1…5 x In)
Pickup time
1)2)
Minimum Typical Maximum
I
Fault
= 2 x set Pickup value 23 ms 25 ms 28 ms
Reset time < 50 ms
Reset ratio Typical 0.96
Retardation time < 30 ms
Trip time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Trip 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 x fn, where n = 2, 3, 4, 5,
…
Peak-to-Peak: No suppression
P-to-P+backup: No suppression
1) Measurement mode = default (depends on stage), current before fault = 0.0 x In, fn = 60 Hz, fault current in
one phase with nominal frequency injected from random phase angle, results based on statistical
2) Includes the delay of the signal output contact
3) Maximum Pickup value = 2.5 x In, Pickup value multiples in range of 1.5 to 20
Section 4
1MRS240050-IB C
Protection functions
136 REF615R
Technical Manual