Signals; Settings - ABB RELION 611 Series Technical Manual

1MRS757454 D
4.1.5.6
4.1.5.7
Table 136: LOFLPTUC Group settings (Basic)
Parameter Values (Range)
Start value low
Start value high
Operate delay time
Table 137: LOFLPTUC Non group settings (Basic)
Parameter Values (Range)
Operation
611 series
Technical Manual
mechanism or harm the personnel handling the machine. Therefore, the motor has to
be disconnected from the power supply as soon as the above condition is detected.
LOFLPTUC detects the condition by monitoring the current values and helps
disconnect the motor from the power supply instantaneously or after a delay according
to the requirement.
When the motor is at standstill, the current will be zero and it is not recommended to
activate the trip during this time. The minimum current drawn by the motor when it is
connected to the power supply is the no load current, that is, the higher start value
current. If the current drawn is below the lower start value current, the motor is
disconnected from the power supply. LOFLPTUC detects this condition and
interprets that the motor is de-energized and disables the function to prevent
unnecessary trip events.

Signals

Table 134: LOFLPTUC Input signals
Name
I_A
I_B
I_C
BLOCK
Table 135: LOFLPTUC Output signals
Name
OPERATE
START

Settings

Unit
0.01...0.50 xIn
0.01...1.00 xIn
400...600000 ms
Unit
1=on
5=off
Type Default Description
SIGNAL 0 Phase A current
SIGNAL 0 Phase B current
SIGNAL 0 Phase C current
BOOLEAN 0=False Block all binary outputs by resetting timers
Type Description
BOOLEAN Operate
BOOLEAN Start
Step Default
0.01 0.10
0.01 0.50
10 2000
Step Default
1=on
Section 4
Protection functions
Description
Current setting/Start value low
Current setting/Start value high
Operate delay time
Description
Operation Off / On
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