ABB Relion 670 series - Function block; Input and output signals

Slope = 0.8
Slope = 1
Operation
area
I
MinOp
99000068.vsd
phase ref
| å I
| - | I |
phase ref
| å I
| + | I
|
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.
11.1.3 Function block
ANSI05000389-2-en.vsd
CCSRDIF (87)
I3P*
IREF*
BLOCK
FAIL
ALARM
ANSI05000389 V2 EN
Figure 302: CCSRDIF (87) function block
11.1.4 Input and output signals
Table 306: CCSRDIF (87) Input signals
Name
Type Default Description
I3P GROUP
SIGNAL
- Group signal for three phase current input
IREF GROUP
SIGNAL
- Reference current signal input
BLOCK BOOLEAN 0 Block of function
1MRK505222-UUS C Section 11
Secondary system supervision
599
Technical reference manual