MPI-525
– USER MANUAL
58
Measurement of RCD trip current I
A
for residual direct current
Test range according to IEC 61557: (0.2...2)I
n
Selected nomi-
nal current of
RCD
Test range
Resolution
Test current
Basic uncer-
tainty
10 mA
2.0..20.0 mA
0.1 mA
0.2 x I
n
..2.0 x I
n
10 % I
n
30 mA
6..60 mA
1 mA
100 mA
20..200 mA
300 mA
60..600 mA
500 mA
100..1000 mA
measurement can be performed for positive or negative residual current
test current pass time
................................ max. 5040 ms
Measurement of resistance-to-earth R
E
Test range according to IEC 61557-5: 0.5
…1.99 k
for test voltage of 50 V and 0.56
…1.99 k
for
test voltage of 25 V
Range
Resolution
Basic uncertainty
0.00...9.99
0.01
(2% w.m. + 4 digits)
10.0...99.9
0.1
(2% w.m. + 3 digits)
100...999
1
1.00...1.99 k
0.01 k
test voltage: 25 V or 50 V rms
test current: 20 mA, sinusoidal rms 125 Hz (for f
n
=50 Hz) and 150 Hz (for f
n
=60 Hz)
blocking of measurement at interference voltage of U
N
>24 V
maximum measured voltage of interferences U
Nmax
=100 V
maximum resistance of auxiliary earth electrodes: 50 k
Measurement of resistance of auxiliary earth electrodes R
H
, R
S
Display range
Resolution
Basic uncertainty
000...999
1
(5% (R
S
+ R
E
+ R
H
) + 3 digits)
1.00...9.99 k
0.01 k
10.0...50.0 k
0.1 k
Measurement of interference voltages
Internal resistance: about 100 k
Range
Resolution
Basic uncertainty
0...100 V
1 V
(2% w.m. + 3 digits)
Low-voltage measurement of continuity of circuit and resistance
Measurement of continuity of protective conductors and equipotential bondings with
200 mA
current
Test range according to IEC 61557-
4: 0,12…400
Range
Resolution
Basic uncertainty
0.00...19.99
0.01
(2% w.m. + 3 digits)
20.0...199.9
0.1
200...400
1
Voltage at open terminals
: 4…9 V
Output current at R<2
: min. 200 mA (I
SC
: 200..250 mA)
Compensation of test leads resistance
Measurements for both polarizations of test current
Summary of Contents for MPI-525
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