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34
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
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Table 44. Negative-sequence overcurrent protection for machines (MNSPTOC)
Characteristic
Operation accuracy
Start time
(1), (2)
I
= 2.0 x 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 Negative-sequence current before = 0.0, fn = 50 Hz, results based on statistical distribution of 1000 measurements
2 Includes the delay of the signal output contact
3 Start value multiples in range of 1.10...5.00
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Table 45. Negative-sequence overcurrent protection for machines (MNSPTOC) main settings
Parameter
Start value
Operating curve type
Operate delay time
Operation
Cooling time
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Table 46. Loss of load supervision (LOFLPTUC)
Characteristc
Operation accuracy
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
—
Table 47. Loss of load supervision (LOFLPTUC) main settings
Parameter
Start value low
Start value high
Operate delay time
Operation
Value
Depending on the frequency of the measured current: f
±1.5% of the set value or ±0.002 x I
Minimum
23 ms
Typically 40 ms
Typically 0.96
< 35 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
MNSPTOC
MNSPTOC
MNSPTOC
MNSPTOC
Function
LOFLPTUC
LOFLPTUC
LOFLPTUC
LOFLPTUC
n
Typical
26 ms
(3)
, where n = 2, 3, 4, 5,...
n
Value (range)
0.01...0.50 × I
n
Definite or inverse time
Curve type: 5, 15, 17, 18
100...120000 ms
1 = on
5 = off
5...7200 s
Value
Depending on the frequency of the measured current: f
±1.5% of the set value or ±0.002 × I
Typically 300 ms
Typically 40 ms
Typically 1.04
<35 ms
±1.0% of the set value or ±20 ms
Value (range)
0.01...0.50 × I
n
0.01...1.00 × I
n
400...600000 ms
1 = on
5 = off
n
Maximum
28 ms
Step
0.01
10
—
1
±2 Hz
n
n
Step
0.01
0.01
10
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