Signals - ABB REB650 Technical Manual

Section 6
Differential protection
6.1.4
6.1.5
Table 24: HZPDIF (87) Group settings (basic)
Name Values (Range)
Operation Disabled
Enabled
AlarmPickup 2 - 500
tAlarm 0.000 - 60.000
TripPickup 5 - 900
R series 10 - 20000
6.1.6
6.1.7
70

Signals

Table 22: HZPDIF (87) Input signals
Name Type
ISI GROUP
SIGNAL
BLOCK BOOLEAN
BLKTR BOOLEAN
Table 23: HZPDIF (87) Output signals
Name Type
TRIP BOOLEAN
ALARM BOOLEAN
MEASVOLT REAL
Settings
Unit Step
- -
V 1
s 0.001
V 1
ohm 1
Monitored data
Table 25: HZPDIF (87) Monitored data
Name Type
MEASVOLT REAL
Operation principle
The 1Ph High impedance differential protection (HZPDIF, 87) function is based on
one current input with external stabilizing resistor and voltage dependent resistor.
Default Description
- Group signal for current input
0 Block of function
0 Block of trip
Description
Trip signal
Alarm signal
Measured RMS voltage on CT secondary side
Default Description
Disabled Disable/Enable Operation
10 Alarm voltage level on CT secondary
5.000 Time delay to activate alarm
100 Pickup voltage level in volts on CT secondary
side
1800 Value of series resistor in Ohms
Values (Range) Unit
- kV
1MRK 505 277-UUS C
Description
Measured RMS voltage on
CT secondary side
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