START
N
N
Y
I
max
> Istart
signal ph (L1, L2, L3)
set log.
signal E
END
AND
Y
Y
N
Y
N
I
L1
, I
L2
, I
L3
, I
E
, U
E
I
max
= highest value of
I
L1
, I
L2
, I
L3
I
ph
> I
min
I
ph
> 0.8 I
max
set log.
All phase currents
I
L1
, I
L2
, I
L3
[(I
E
≥ 3I0
min
) AND
(I
E
≥ 0.25I
max
)]
AND/OR
(U
E
≥ 3U0
min
)
18000012-IEC19000414-1-en.vsdx
IEC19000414 V1 EN-US
Figure 13: Overcurrent starters (IStart)
1MRK 505 406-UEN B
Section 5
Bay protection functions
Bay protection functions REB500
53
Technical manual
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