Table 85:
50P-3 Monitored data
Name
Type
Values (Range)
Unit
Description
PICKUP_DUR
FLOAT32
0.00...100.00
%
Ratio of pickup time / trip time
50P-3
Enum
1=Enabled
2=blocked
3=test
4=test/blocked
5=Disabled
Status
4.1.1.11
Technical data
Table 86:
51P/50P Technical data
Characteristic
Value
Operation
accuracy
Depending on the frequency of the measured current: f
n
±2 Hz
51P
±1.5% of the set value or ±0.002 × I
n
50P-1/2
and
50P-3
±1.5% of 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
)
Pickup time
1)2)
Minimum
Typical
Maximum
50P-3:
I
Fault
= 2 × set
Pickup value
I
Fault
= 10 × set
Pickup value
15 ms
12 ms
16 ms
13 ms
17 ms
14 ms
51P and 50P-1/2:
I
Fault
= 2 × set
Pickup value
23 ms
25 ms
28 ms
Reset time
<40 ms
Reset ratio
Typically 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 × f
n
, 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 × I
n
, f
n
= 60 Hz, fault current in
one phase 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
3) Maximum
Pickup value = 2.5 x I
n
,
Pickup value multiples in range of 1.5...20
Section 4
1MRS240050-IB C
Protection functions
130
REF615R
Technical Manual
Summary of Contents for RELION REF615R
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