ABB RELION REF615R, Technical Manual

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4.6.1.8 Monitored data
Table 246: 87LOZREF Monitored data
Name Type Values (Range) Unit Description
PICKUP_DUR FLOAT32 0.00...100.00 % Ratio of pickup time / trip time
RES2H BOOLEAN 0=False
1=True
2nd harmonic restraint
IDIFF FLOAT32 0.00...80.00 xIn Differential current
IBIAS FLOAT32 0.00...80.00 xIn Stabilization current
87LOZREF Enum 1=Enabled
2=blocked
3=test
4=test/blocked
5=Disabled
Status
4.6.1.9 Technical data
Table 247: 87LOZREF Technical data
Characteristic Value
Operation accuracy Depending on the frequency of the measured
current: f
n
±2 Hz
±2.5% of the set value or ±0.002 x I
n
Pickup time 1)2)
Minimum Typical Maximum
I
Fault
= 2.0 × set
Trip
value
37 ms 40 ms 45 ms
Reset time <40 ms
Reset ratio Typically 0.96
Retardation time <35 ms
Trip time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Suppression of harmonics DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5, …
1) Current before fault = 0.0, f
n
= 60 Hz, results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
1MRS240050-IB C
Section 4
Protection functions
REF615R 311
Technical Manual