Table 50. Loss of load supervision (LOFLPTUC)
Characteristic Value
Operation accuracy At the frequency f = f
n
±1.5% of the set value or ±0.002 × I
n
Start time
1)
Typical <330 ms
Reset time < 40 ms
Reset ratio Typical 0.96
Retardation time < 35 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
1) Includes the delay of the signal output contact
Table 51. Loss of load supervision (LOFLPTUC) main settings
Parameter
Function Value (Range) Step
Start value high LOFLPTUC 0.01...1.00 pu 0.01
Start value low LOFLPTUC 0.01...0.50 pu 0.01
Operate delay time LOFLPTUC 0.40...600.00 s 0.01
Table 52. High-impedance or flux balance-based differential protection for machines
(MHZPDIF)
Characteristic
Value
Operation accuracy ±1.5 % of the set value or 0.002 x In
Start time
1)2)
Typical 15 ms (±10 ms)
Reset time < 65 ms
Reset ratio Typical 0.96
Retardation time < 50 ms
Operate time accuracy in definite time mode ±1.0% of the set value of ±20 ms
1) Fn = 50 Hz, results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
Table 53. High-impedance or flux-balance-based differential protection for machines
(MHZPDIF) main settings
Parameter
Function Values (Range) Step
Operate value MHZPDIF 0.5-50.0 0.1
Minimum operate
time
MHZPDIF 0.02-300.00 0.01
Motor Protection and Control 1MRS756977 D
REM630
Product version: 1.1 Issued: 2011-05-18
38 ABB
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