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Protection functions
Earth fault Cold Load Pick-Up/
Blocking
CLPU 50N/51N
Characteristics
Time before activation Tcold (Setting common to CLPU 50/51 and CLPU 50N/51N functions)
Setting
0.1 to 300 s
Resolution
10 ms
Accuracy
±2% or ±20 ms
Pick-up threshold CLPUs (Setting common to CLPU 50/51 and CLPU 50N/51N functions)
Setting
10 to 100% In
Resolution
1% In
Accuracy
±5% or ±1% In
Global action CLPU 50N/51N
Setting
Blocking/Multiplication of the set point
Action on ANSI 50N/51N protection unit x
Setting
OFF/ON
Time delay T0/x for ANSI 50N/51N protection unit x
Resolution setting
100 to 999 ms in 1 ms steps
1 to 999 s in 1 s steps
1 to 999 min in 1 min steps
Accuracy
±2% or ±20 ms
Multiplying factor M0/x for ANSI 50N/51N protection unit x
Setting
100 to 999% Is0
Resolution
1% Is
PCRED301006EN - 03/2011
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