Technical Data - ABB REG670 Technical Manual

1MRK502052-UEN B
6.2.8
Technical manual
The voltage waveform is then filtered in order to get its RMS value. Note that used
filtering is designed in such a way that it ensures complete removal of the DC current
component which may be present in the primary fault current. The voltage RMS value
is then compared with set Alarm and Trip thresholds. Note that the TRIP signal is
intentionally delayed on drop off for 30 ms within the function. The measured RMS
voltage is available as a service value from the function. The function has block and
trip block inputs available as well.
IEC05000301 V1 EN
Figure 46: Logic diagram for 1Ph High impedance differential protection
HZPDIF

Technical data

Table 53: HZPDIF technical data
Function Range or value
Operate voltage (10-900) V
I=U/R
Reset ratio >95% at (30-900) V
Maximum
U>Trip
continuous power
Operate time at 0 Min = 5 ms
to 10 x U Max = 15 ms
d
Reset time at 10 Min = 75 ms
to 0 x U Max = 95 ms
d
Critical impulse 2 ms typically at 0 to 10 x U
time
Operate time at 0 Min = 25 ms
to 2 x U Max = 35 ms
d
Reset time at 2 to Min = 50 ms
0 x U Max = 70 ms
d
Critical impulse 15 ms typically at 0 to 2 x U
time
2
/SeriesResistor ≤200 W
d
d
Section 6
Differential protection
Accuracy
± 1.0% of I at I ≤ I
r r
± 1.0% of I at I > I
r
-
-
-
-
145