Table 135. Negative-sequence overcurrent protection for machines (MNSPTOC) main settings
Parameter Function Value (Range) Step
Start value MNSPTOC
0.01...0.50 × I
n
0.01
Operating curve type MNSPTOC Definite or inverse time
Curve type: 5, 15, 17, 18
Operate delay time MNSPTOC 100...120000 ms 10
Operation MNSPTOC 1 = on
5 = off
-
Cooling time MNSPTOC 5...7200 s 1
Table 136. Loss of phase, undercurrent (PHPTUC)
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 × I
n
Start time Typically <55 ms
Reset time <40 ms
Reset ratio Typically 1.04
Retardation time <35 ms
Operate time accuracy in definite time mode mode ±1.0% of the set value or ±20 ms
Table 137. Loss of phase, undercurrent (PHPTUC) main settings
Parameter
Function Value (Range) Step
Current block value PHPTUC 0.00...0.50 × I
n
0.01
Start value PHPTUC 0.01...1.00 × I
n
0.01
Operate delay time PHPTUC 50...200000 ms 10
Table 138. Loss of load supervision (LOFLPTUC)
Characteristic
Value
Operation accuracy Depending on the frequency of the measured current: f
n
±2 Hz
±1.5% of the set value or ±0.002 × I
n
Start time Typically 300 ms
Reset time Typically 40 ms
Reset ratio Typically 1.04
Retardation time <35 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
1MRS759144 A
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