Settings; Monitored Data; Operation Principle - ABB REC650 Technical Manual

Section 6
Current protection
6.10.5
Table 87: BRCPTOC Group settings (basic)
Name
Operation
Iub>
IP>
tOper
Table 88: BRCPTOC Non group settings (basic)
Name
GlobalBaseSel
6.10.6
6.10.7
142
Table 86: BRCPTOC Output signals
Name
TRIP
START

Settings

Values (Range) Unit
Off -
On
50 - 90 %IM
5 - 100 %IB
0.000 - 60.000 s
Values (Range) Unit
1 - 6 -

Monitored data

Table 89: BRCPTOC Monitored data
Name
IUNBAL

Operation principle

Broken conductor check (BRCPTOC) detects a broken conductor condition by
detecting the asymmetry between currents in the three phases. The current-measuring
elements continuously measure the three-phase currents.
The current asymmetry signal output START is set on if:
• The difference in currents between the phase with the lowest current and the
phase with the highest current is greater than set percentage Iub> of the highest
phase current
• The highest phase current is greater than the minimum setting value IP>.
• The lowest phase current is below 50% of the minimum setting value IP>
Type Description
BOOLEAN Operate signal of the protection logic
BOOLEAN Start signal of the protection logic
Step Default
- Off
1 50
1 20
0.001 5.000
Step Default
1 1
Type Values (Range)
REAL -
1MRK 511 287-UEN A
Description
Operation Off / On
Unbalance current operation value in
percent of max current
Minimum phase current for operation of
Iub> in % of Ibase
Operate time delay
Description
Selection of one of the Global Base Value
groups
Unit Description
- Measured unbalance of
phase currents
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