BENNING IT 115
Technical data
- 58 -
7.5 Line impedance and prospective short-circuit current / voltage drop
Line impedance
Measuring range according to EN 61557-3: 0.25
9.99 k
Measuring range (
)
Resolution (
)
Accuracy
0.00
9.99
0.01
(5 % of the measured value + 5
digits)
10.0
99.9
0.1
100
999
1
10 % of the measured value
1.00 k
9.99 k
10
Prospective short-circuit current (calculated value)
Measuring range (A)
Resolution (A)
Accuracy
0.00
0.99
0.01
Please observe the accuracy of the
line impedance measurement.
1.0
99.9
0.1
100
999
1
1.00 k
99.99 k
10
100 k
199 k
1000
Testing current (at 230 V) ...................... 6.5 A (10 ms)
Nominal voltage range ........................... 93 V
134 V (45 Hz
65 Hz)
185 V
266 V (45 Hz
65 Hz)
321 V
485 V (45 Hz
65 Hz)
Voltage drop (calculated value)
Measuring range (%)
Resolution (%)
Accuracy
0.0
99.9
0.1
Please observe the accuracy of the line
impedance measurement*.
Z
REF
measuring range ............................ 0.00 Ω
20.0 Ω
* Please refer to chapter
5.6.2 Voltage drop
for information on how to calculate the voltage drop.
7.6 Earthing resistance
Measuring range according to EN61557-5: 2,00
1999
Measuring range (
)
Resolution (
)
Accuracy
0.00
19.99
0.01
(5 % of the measured value + 5 digits)
20.0
199.9
0.1
200
9999
1
Maximum auxiliary earth electrode resistance R
C
...100
R
E
or 50 k
(the lower value shall apply)
Maximum probe resistance R
P
................................100
R
E
or 50 k
(the lower value shall apply)
Additional error at R
Cmax
or R
Pmax
.............................
(10 % of the measured value + 10 digits)
Additional error at interference voltage of 3 V (50 Hz)
(5 % of the measured value + 10 digits)
Open-circuit voltage ................................................< 30 VAC
Short-circuit current ................................................<30 mA
Frequency of testing voltage ...................................125 Hz, sinusoidal
Interference voltage indicating threshold .................1 V (< 50
, maximum)
Automatic measurement of auxiliary earth electrode resistance and probe resistance.
Automatic monitoring of interference voltage.
