Signals; Settings; Monitored Data; Operation Principle - ABB Relion 650 Series REB650 Technical Manual

Section 6
Differential protection
6.1.4
6.1.5
Table 26: HZPDIF Group settings (basic)
Name
Operation
U>Alarm
tAlarm
U>Trip
SeriesResistor
6.1.6
6.1.7
76

Signals

Table 24: HZPDIF Input signals
Name
ISI
BLOCK
BLKTR
Table 25: HZPDIF Output signals
Name
TRIP
ALARM
MEASVOLT

Settings

Values (Range) Unit
Off -
On
2 - 500 V
0.000 - 60.000 s
5 - 900 V
10 - 20000 ohm

Monitored data

Table 27: HZPDIF Monitored data
Name
MEASVOLT

Operation principle

The 1Ph High impedance differential protection (HZPDIF) function is based on one
current input with external stabilizing resistor and voltage dependent resistor. Three
functions can be used to provide a three phase differential protection function. The
stabilizing resistor value is calculated from the function operating value UR
Type Default Description
GROUP - Group signal for current input
SIGNAL
BOOLEAN 0 Block of function
BOOLEAN 0 Block of trip
Type Description
BOOLEAN Trip signal
BOOLEAN Alarm signal
REAL Measured RMS voltage on CT secondary side
Step Default
- Off
1 10
0.001 5.000
1 100
1 1800
Type Values (Range)
REAL -
1MRK 505 288-UEN A
Description
Operation Off / On
Alarm voltage level in volts on CT
secondary side
Time delay to activate alarm
Operate voltage level in volts on CT
secondary side
Value of series resistor in Ohms
Unit Description
kV Measured RMS voltage
on CT secondary side
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