METREL MI 3125 - Fault Loop Impedance & RCD Selected Specs

MI 3125 EurotestCOMBO Technical specification
52
Prospective fault current (calculated value)
Measuring range (A) Resolution (A) Accuracy
0.00 ÷ 9.99
0.01
10.0 ÷ 99.9
0.1
100 ÷ 999
1
1.00k ÷ 9.99k
10
10.0k ÷ 23.0k
100
Consider accuracy of fault
loop resistance
measurement
The accuracy is valid if mains voltage is stabile during the measurement.
Test current (at 230 V)...................... 6.5 A (10 ms)
Nominal voltage range...................... 30 V ÷ 500 V (45 Hz ÷ 65 Hz)
7.4.2 RCD selected
Fault loop impedance
Measuring range according to EN61557 is 0.46 Ω ÷ 9.99 kΩ.
Measuring range (Ω) Resolution (Ω)
Accuracy
0.00 ÷ 9.99
0.01
10.0 ÷ 99.9
0.1
±(5 % of reading + 10 digits)
100 ÷ 999
1
1.00k ÷ 9.99k
10
± 10 % of reading
Accuracy may be impaired in case of heavy noise on mains voltage
Prospective fault current (calculated value)
Measuring range (A) Resolution (A) Accuracy
0.00 ÷ 9.99
0.01
10.0 ÷ 99.9
0.1
100 ÷ 999
1
1.00k ÷ 9.99k
10
10.0k ÷ 23.0k
100
Consider accuracy of fault
loop resistance
measurement
Nominal voltage range...................... 30 V ÷ 500 V (45 Hz ÷ 65 Hz)
No trip out of RCD.
R, XL values are indicative.
7.5 Line impedance and prospective short-circuit current
Line impedance
Measuring range according to EN61557 is 0.25 Ω ÷ 9.99kΩ.
Measuring range (Ω) Resolution (Ω)
Accuracy
0.00 ÷ 9.99
0.01
10.0 ÷ 99.9
0.1
±(5 % of reading + 5 digits)
100 ÷ 999
1
1.00k ÷ 9.99k
10
± 10 % of reading