ABB RELION REB500 Technical Manual page 59

1MRK 505 406-UEN B
IEC19000414 V1 EN-US
Figure 13:
Bay protection functions REB500
Technical manual
START
I , I , I , I , U
L 1 L 2 L 3 E E
I = highest value of
ma x
I , I , I
L 1 L 2 L 3
N
I > Istart
ma x
Y
I > I
p h mi n
N
AND
I > 0.8 I
p h ma x
Y
set log.
signal ph (L1, L2, L3)
N
All phase currents
I , I , I
L 1 L 2 L 3
Y
[(I ≥ 3I0 ) AND
E mi n
N
(I ≥ 0.25I )]
E ma x
AND/OR
(U ≥ 3U0 )
E mi n
Y
set log.
signal E
END
18000012-IEC19000414-1-en.vsdx
Overcurrent starters (IStart)
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Section 5
Bay protection functions
53