ABB REF611 - Page 131

X120-BI1
LED 1
ISWGAPC1
OUT_4
IN
SELGAPC4
OUT_1
IN_10
OSWGAPC8
OR
OUT
IN_1
IN_2
IN_3
IN_4
OVERCURRENT PROTECTION AND INRUSH INDICATION
DPHLPDOC1
3I>(1)
51P-1(1)
BLOCK START
OPERATE3I
ENA_MULT
DPHLPDOC2
3I>(2)
51P-1(2)
BLOCK START
OPERATE3I
ENA_MULT
DPHHPDOC1
3I>>(1)
51P-2(1)
BLOCK START
OPERATE3I
ENA_MULT
SELGAPC1
OUT_1
IN_1
PHIPTOC1
3I>>>(1)
50P/51P(1)
BLOCK
START
OPERATE
3I
ENA_MULT
Blocking 1
INRPHAR1
3I
2f
>(1)
68(1)
BLOCK
BLK2H
3I
GUID-FB8E7A93-E98A-4968-B8C6-FBD091F5E635 V2 EN
Figure 106: Overcurrent protection
Four overcurrent stages are offered for overcurrent and short-circuit protection. The
instantaneous stage PHIPTOC1 can be blocked by energizing the binary input
(X120:1-2). The inrush detection block’s INRPHAR1 output BLK2H enables either
blocking the function or multiplying the active settings for any of the described
protection function blocks.
All operate signals are connected to the Master Trip and to the alarm LED 1.
1MRS757456 D Section 3
REF611 standardized configurations
REF611 125
Application Manual