MPI-525
– USER MANUAL
55
Indications of short-circuit current I
K
Test ranges according to IEC 61557 can be calculated on the basis of test ranges for Z
S
and nominal
voltages.
Display range
Resolution
Basic uncertainty
0.055…1.999 A
0.001 A
Calculated on the basis of
error for fault loop
2.00...19.99 A
0.01 A
20.0...199.9 A
0.1 A
200...1999 A
1 A
2.00...19.99 kA
0.01 kA
20.0…40.0 kA
0.1 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
current value, displayed by the meter or by firmware.
Measurement of short circuit loop impedance Z
L-PE
RCD (without tripping of RCD)
Measurement of short circuit loop impedance Z
S
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
Resolution
Basic uncertainty
0...19.99
0.01
(6% w.m. + 10 digits)
20.0...199.9
0.1
(6% w.m. + 5 digits)
200...1999
1
Do not trip RCD with I
Δn
≥ 30 mA
Nominal working voltage U
n
: 110 V, 115 V, 127 V, 220 V, 230 V, 240 V
Working range of voltage
: 95…270 V
Nominal network frequency f
n
: 50 Hz, 60 Hz
Working range of frequency
: 45…65 Hz
Test of correct PE terminal connection with a touch electrode
Indications of short circuit loop resistance R
S
and short circuit loop reactance X
S
Display range
Resolution
Basic uncertainty
0..19.99
0.01
(6% + 10 digits) of Z
S
value
Calculated and displayed for a value of Z
S
<20
Indications of short-circuit current I
K
Test range according to IEC 61557 can be calculated on the basis of test ranges for Z
S
and nominal
voltages.
Display range
Resolution
Basic uncertainty
0.055…1.999 A
0.001 A
Calculated on the basis of un-
certainty for fault loop
2.00...19.99 A
0.01 A
20,0...199.9 A
0.1 A
200...1999 A
1 A
2.00...19.99 kA
0.01 kA
20.0…40.0 kA
0.1 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
current value, displayed by the meter or by firmware.
Summary of Contents for MPI-525
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