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30
R E M 6 1 5 A N S I 5 . 0 F P 1 M OTO R P R OT E C T I O N A N D C O N T R O L
—
Table 32. Non-directional earth-fault protection (EFxPTOC)
Characteristic
EFLPTOC
Operation accuracy
EFHPTOC
and
EFIPTOC
EFIPTOC
I
= 2 × set Start value
Start time
(2), (3)
Fault
I
= 10 × set Start value
Fault
EFHPTOC and EFLPTOC:
I
= 2 × set Start value
Fault
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
1 Not included in REM615
2 Measurement mode = default (depends on stage), current before fault = 0.0 × I
based on statistical distribution of 1000 measurements
3 Includes the delay of the signal output contact
4 Maximum Start value = 2.5 × I
, Start value multiples in range of 1.5...20
n
—
Table 33. Non-directional earth-fault protection (EFxPTOC) main settings
Parameter
Start value
Time multiplier
Operate delay time
Operating curve type
(2)
1 Not included in this product
2 For further reference, see the Operation characteristics table
Value
Depending on the frequency of the measured current: f
±1.5% of the set value or ±0.002 x I
±1.5% of set value or ±0.002 x I
(at currents in the range of 0.1...10 x I
±5.0% of the set value
(1)
(at currents in the range of 10...40 x I
Minimum
:
(1)
16 ms
11 ms
23 ms
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
DFT: -50dB at f = n x f
Function
EFLPTOC
EFHPTOC
EFIPTOC
(1)
EFLPTOC and EFHPTOC
EFLPTOC and EFHPTOC
EFIPTOC
(1)
EFLPTOC
EFHPTOC
EFIPTOC
(1)
n
n
)
n
)
n
Typical
19 ms
12 ms
26 ms
(4)
, where n = 2, 3, 4, 5,...
n
, f
= 50 Hz, earth-fault current with nominal frequency injected from random phase angle, results
n
n
Value (range)
0.010...5.000 × I
n
0.10...40.00 × I
n
1.00...40.00 × I
n
0.05...15.00
40...200000 ms
20...200000 ms
Definite or inverse time
Curve type: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19
Definite or inverse time
Curve type: 1, 3, 5, 9, 10, 12, 15, 17
Definite time
±2 Hz
n
Maximum
23 ms
14 ms
29 ms
Step
0.005
0.01
0.01
0.01
10
10
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