ABB Relion 670 Series Technical Reference Manual page 605

1MRK505222-UUS C
11.1.3
11.1.4
Technical reference manual
| åI
| - | I |
phase ref
I
MinOp
IEC99000068 V1 EN
Figure 301: Operate characteristics
Due to the formulas for the axis compared, |SIphase | - |I ref | and |S I
phase | + | I ref | respectively, the slope can not be above 2.
Function block
CCSRDIF (87)
I3P* FAIL
IREF* ALARM
BLOCK
ANSI05000389-2-en.vsd
ANSI05000389 V2 EN
Figure 302: CCSRDIF (87) function block
Input and output signals
Table 306: CCSRDIF (87) Input signals
Name Type
I3P GROUP
SIGNAL
IREF GROUP
SIGNAL
BLOCK BOOLEAN
Secondary system supervision
Slope = 1
Operation
Slope = 0.8
| åI
phase
Default Description
- Group signal for three phase current input
- Reference current signal input
0 Block of function
Section 11
area
| + | I |
ref
99000068.vsd
599