ABB Relion 611 series REB611 Product Manual page 25

ABB
Busbar and Multipurpose Differential Protection and Control
REB611
Product version: 1.0
Supervision functions
Table 35. CT supervision for high-impedance protection scheme (HZCCRDIF)
Characteristic
Operation accuracy
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Table 36. CT supervision for high-impedance protection scheme (HZCCRDIF) main settings
Parameter Values (Range)
Start value 1.0...100.0
Alarm delay time 100...300000
Alarm output mode 1=Non-latched
3=Lockout
Value
Depending on the frequency of the current measured: fn
±2 Hz
±1.5% of the set value or ±0.002 x In
< 40 ms
Typical 0.96
< 35 ms
±1.0% of the set value or ±20 ms
Unit Step Default
%In 0.1 10.0
ms 10 3000
3=Lockout
1MRS757467 B
Description
Start value,
percentage of the
nominal current
Alarm delay time
Select the operation
mode for alarm output
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