6.1.4
Signals
Table 22:
HZPDIF (87) Input signals
Name
Type
Default
Description
ISI
GROUP
SIGNAL
-
Group signal for current input
BLOCK
BOOLEAN
0
Block of function
BLKTR
BOOLEAN
0
Block of trip
Table 23:
HZPDIF (87) Output signals
Name
Type
Description
TRIP
BOOLEAN
Trip signal
ALARM
BOOLEAN
Alarm signal
MEASVOLT
REAL
Measured RMS voltage on CT secondary side
6.1.5
Settings
Table 24:
HZPDIF (87) Group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
Operation
Disabled
Enabled
-
-
Disabled
Disable/Enable Operation
AlarmPickup
2 - 500
V
1
10
Alarm voltage level on CT secondary
tAlarm
0.000 - 60.000
s
0.001
5.000
Time delay to activate alarm
TripPickup
5 - 900
V
1
100
Pickup voltage level in volts on CT secondary
side
R series
10 - 20000
ohm
1
1800
Value of series resistor in Ohms
6.1.6
Monitored data
Table 25:
HZPDIF (87) Monitored data
Name
Type
Values (Range)
Unit
Description
MEASVOLT
REAL
-
kV
Measured RMS voltage on
CT secondary side
6.1.7
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.
Section 6
1MRK 505 277-UUS C
Differential protection
70
Technical Manual
Summary of Contents for REB650
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