Signals - ABB RELION REX640 Technical Manual

1MRS759142 C
4.12.3.7
4.12.3.8
Table 978: HCUBPTOC Group settings (Basic)
Parameter Values (Range)
Start value
Alarm start value
Time multiplier
Table continues on next page
REX640
Technical Manual
Steps to measure natural unbalance current
1. The setting Natural Comp Enable must be set to "TRUE".
2. The capacitor bank must be energized.
3. The capacitor bank compensated unbalance current I_COM_AMPL is observed
from Monitored data.
4. The command Record unbalance must be activated by selecting the value
"Record" which stores the unbalance reference for future unbalance calculations.
5. The compensated unbalance current (I_COM_AMPL) is re-checked to be
approximately zero.
The natural unbalance recording should be made only during the
steady-state condition and when all the capacitor bank elements are
assumed to be in service.

Signals

Table 976: HCUBPTOC Input signals
Name
I3P1
I3P2
BLOCK
Table 977: HCUBPTOC Output signals
Name
OPERATE
START
ALARM
Settings
Unit
0.01...1.00 xIn
0.01...1.00 xIn
0.05...15.00
Type Default Description
SIGNAL - Three-phase currents 1
SIGNAL - Three-phase currents 2
BOOLEAN 0=False Block signal for activating the blocking mode
Type Description
BOOLEAN Operate
BOOLEAN Start
BOOLEAN Alarm
Step Default
0.01 0.10
0.01 0.05
0.01 1.00
Section 4
Protection functions
Description
Start value
Alarm start value
Time multiplier in IEC/ANSI IDMT curves
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