ABB REC650 ANSI Technical Manual page 132

Section 6
Current protection
INNonDirPU
UN_PU
OpMODE=INcosPhi
Pickup_N
INCosPhiPU
OpMODE=INVNCosPhi
INVNCosPhiPU
Phi in RCA +- ROA
OpMODE=IN and Phi
DirMode = Forw
Forw
DirMode = Rev
Rev
ANSI06000653 V1 EN
Figure 49: Simplified logical diagram of the sensitive ground-fault current protection
126
When the function is activated binary output signal PUVN is activated. If the output
signals are active after the set delay tVNNonDir TRIP and TRUN are activated. A
simplified logical diagram of the total function is shown in figure 49.
AND
AND
AND
AND OR
AND
0 - t
0
0 - t
0
OR AND
TimeChar = InvTime
TimeChar = DefTime
1MRK 511 287-UUS A
t
SN
AND
AND
en06000653_ansi.vsd
Technical manual
PUNDIN
TRNDIN
PUVN
TRVN
PUDIRIN
TRDIRIN
PUFW
PUREV