ABB REG670 - Technical Data

IEC10000326-3.vsd
R
f
Trip
Alarm
OR
TripDelay
Adaptive
IEC10000326 V2 EN
Figure 144: STTIPHIZ alarm and trip logic
If the fault resistance R
f
is smaller than R
Alarm
and last longer than set alarm delay,
output ALARM is set. If the fault resistance R
f
is smaller than R
Trip
, output signal
TRIP is set after the calculated time. For trip time delay, see fig
142
7.9.10 Technical data
Table 143: STTIPHIZ technical data
Function
Range or value Accuracy
Fault resistance sensitivity Can be reached at
steady state operating
condition of the
machine
50 kΩ
Typically 10 kΩ
Injection frequency (50.000 - 250.000) Hz ±0.1 Hz
Injection voltage 240 V
Trip limit of fault resistance (100 - 10000)Ω ±5% of 1 kΩ at R
f
≤ 1 kΩ
±10% of set value at R
f
> 1 kΩ
Alarm limit of fault resistance (100 - 100000)Ω ±5% of 1 kΩ at R
f
≤ 1 kΩ
±10% of 10 kΩ at 1 kΩ < R
f
≤ 10 kΩ
±50% of set value at R
f
> 10 kΩ
Operate time, start at R
f
~ 0Ω
and filter length = 1 s
1.00 s typically -
Operate time, trip at R
f
~ 0Ω and
filter length = 1 s
3.00 s typically -
Alarm time delay at R
f
~ 0Ω and
filter length = 1 s
(0.00 - 600.00) s ±0.2% or ± 2.00 s whichever is greater
Section 7 1MRK502052-UEN B
Impedance protection
318
Technical manual