ABB REC650 User Manual

9.1.4 Signals
Table 149: CCSRDIF Input signals
Name
Type Default Description
I3P GROUP
SIGNAL
- Three phase group signal for current inputs
IREF GROUP
SIGNAL
- Group signal for current reference
BLOCK BOOLEAN 0 Block of function
Table 150: CCSRDIF Output signals
Name Type Description
FAIL BOOLEAN Detection of current circuit failure
ALARM BOOLEAN Alarm for current circuit failure
9.1.5 Settings
Table 151: CCSRDIF Group settings (basic)
Name
Values (Range) Unit Step Default Description
Operation Off
On
- - Off Operation Off / On
IMinOp 5 - 200 %IB 1 20 Minimum operate current differential level
in % of IBase
Table 152: CCSRDIF Group settings (advanced)
Name
Values (Range) Unit Step Default Description
Ip>Block 5 - 500 %IB 1 150 Block of the function at high phase
current, in % of IBase
Table 153: CCSRDIF Non group settings (basic)
Name
Values (Range) Unit Step Default Description
GlobalBaseSel 1 - 6 - 1 1 Selection of one of the Global Base Value
groups
9.1.6 Operation principle
Current circuit supervision CCSRDIF compares the absolute value of the vectorial
sum of the three phase currents |ΣIphase| and the numerical value of the residual
current |Iref| from another current transformer set, see figure 87.
The FAIL output will be set to a logical one when the following criteria are fulfilled:
Section 9 1MRK 511 287-UEN A
Secondary system supervision
192
Technical manual

ABB REC650 Specifications

General

Brand	ABB
Model	REC650
Category	Control Unit
Language	English