Signals - ABB RELION REX640 Technical Manual

Section 4
Protection functions
4.12.1.7
4.12.1.8
Table 954: COLPTOC Group settings (Basic)
Parameter
Start value overload
Alarm start value
Start value Un Cur
Time multiplier
Alarm delay time
Un Cur delay time
1018
a period of time. To avoid an undercurrent trip operation when the capacitor bank is
disconnected from the power system, the undercurrent functionality is blocked by
using the capacitor bank circuit breaker status signal.
Furthermore, the reclosing inhibition feature provides protection against the
reconnection of a charged capacitor to a live network. Whenever the capacitor bank
circuit breaker is opened, the reclosing is inhibited for the duration of the discharge
time of the capacitor. The reclosing inhibition functionality can be disabled manually
or automatically. In the manual mode, the inhibition reclosing has to be manually reset
and in automatic mode, the reclosing inhibitionl resets automatically after the set time.

Signals

Table 952: COLPTOC Input signals
Name
I3P
BLOCK
CB_CLOSED
Table 953: COLPTOC Output signals
Name
OPR_OVLOD
OPR_UN_I
ST_OVLOD
ST_UN_I
ALARM
BLK_CLOSE
Settings
Values (Range) Unit
0.30...1.50 xIn
80...120 %
0.10...0.70 xIn
0.05...2.00
500...6000000 ms
100...120000 ms
Type Default Description
SIGNAL - Three-phase currents
BOOLEAN 0=False Block signal for activating the blocking mode
BOOLEAN 0=False Input showing the status of capacitor circuit breaker
Type Description
BOOLEAN Overload operated
BOOLEAN Operate under current
BOOLEAN Overload started
BOOLEAN Under current started
BOOLEAN Alarm
BOOLEAN Inhibit re-close of capacitor bank
Step Default
0.01 1.00
1 105
0.01 0.50
0.01 1.00
100 300000
100 1000
1MRS759142 C
Description
Start value for overload stage
Alarm start value (% of Start value
overload)
Start value for under current operation
Time multiplier for Capacitor Bank
protection curves
Alarm delay time
Delay time for under current operation
Technical Manual
REX640