Sonel WMGBMPI525 User Manual page 57

Indications of short-circuit current I
Test ranges according to IEC 61557 can be calculated on the basis of test ranges for Z
voltages.
Display range
0.055...1.999 A
2.00...19.99 A
20.0...199.9 A
200...1999 A
2.00...19.99 kA
20.0...40.0 kA

Prospective fault current calculated and displayed by the meter may slightly differ from the value
calculated by the user with a calculator, basing on the displayed value of the impedance, because
the meter calculates the current from unrounded value of fault loop impedance (which is used for
displaying). As the correct value, consider I
Measurement of short circuit loop impedance Z
Measurement of short circuit loop impedance Z
Test range according to IEC 61557: 0.50...1999  for 1.2 m, WS-03 and WS-04 leads and 0.51...1999
 for 5 m, 10 m and 20 m leads
Display range
0...19.99 
20.0...199.9 
200...1999 

Do not trip RCD with I

Nominal working voltage U

Working range of voltage: 95...270 V

Nominal network frequency f

Working range of frequency: 45...65 Hz

Test of correct PE terminal connection with a touch electrode
Indications of short circuit loop resistance R
Display range
0..19.99 

Calculated and displayed for a value of Z
Indications of short-circuit current I
Test range according to IEC 61557 can be calculated on the basis of test ranges for Z
voltages.
Display range
0.055...1.999 A
2.00...19.99 A
20,0...199.9 A
200...1999 A
2.00...19.99 kA
20.0...40.0 kA

Prospective fault current calculated and displayed by the meter may slightly differ from the value
calculated by the user with a calculator, basing on the displayed value of the impedance, because
the meter calculates the current from unrounded value of fault loop impedance (which is used for
displaying). As the correct value, consider I
K
Resolution
0.001 A
0.01 kA
Resolution
0.01 
≥ 30 mA
Δn
: 110 V, 115 V, 127 V, 220 V, 230 V, 240 V
n
: 50 Hz, 60 Hz
n
S
Resolution
0.01 
S
K
Resolution
0.001 A
0.01 kA
MPI-525 – USER MANUAL
0.01 A
0.1 A
1 A
0.1 kA
current value, displayed by the meter or by firmware.
k
RCD (without tripping of RCD)
L-PE
S
0.1 
1 
and short circuit loop reactance X
(6% + 10 digits) of Z
<20 
0.01 A
0.1 A
1 A
0.1 kA
current value, displayed by the meter or by firmware.
k
Accuracy
Calculated on the basis of
accuracy for fault loop
Accuracy
(6% m.v. + 10 digits)
(6% m.v. + 5 digits)
S
Accuracy
Accuracy
Calculated on the basis of ac-
curacy for fault loop
and nominal
S
value
S
and nominal
S
55