Function Block - ABB REG650 Technical Manual

Section 11
Secondary system supervision
11.1.3
11.1.4
304
A criterion based on delta current and delta voltage measurements can be added to the
fuse failure supervision function in order to detect a three phase fuse failure, which in
practice is more associated with voltage transformer switching during station operations.

Function block

SDDRFUF
I3P* BLKZ
V3P* BLKV
BLOCK 3PH
52A DLD1PH
MCBOP DLD3PH
89B
ANSI08000220-1-en.vsd
ANSI08000220 V1 EN
Figure 141: SDDRFUF function block
Signals
Table 181: SDDRFUF Input signals
Name Type
I3P GROUP
SIGNAL
V3P GROUP
SIGNAL
BLOCK BOOLEAN
52a BOOLEAN
MCBOP BOOLEAN
89b BOOLEAN
Table 182: SDDRFUF Output signals
Name Type
BLKZ BOOLEAN
BLKV BOOLEAN
3PH BOOLEAN
DLD1PH BOOLEAN
DLD3PH BOOLEAN
Default Description
- Three phase group signal for current inputs
- Three phase group signal for voltage inputs
0 Block of function
0 Active when circuit breaker is closed
0 Active when external Miniature Circuit Breaker opens
protected voltage circuit
0 Active when line disconnect switch is open
Description
Start of current and voltage controlled function
General pickup
Three-phase pickup
Dead line condition in at least one phase
Dead line condition in all three phases
1MRK 502 043-UUS B
Technical Manual