Sonel MPI-540 User Manual

MPI-540 – USER MANUAL
173
 Prospective fault current calculated and displayed by the meter may slightly differ from the val-
ue 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.
10.1.5 Measurement of parameters of RCD
 Measurement of RCDs type: AC, A, B, D, F
 Rated operating voltage U
n
: 110 V, 115 V, 127 V, 220 V, 230 V, 240 V
 Operating voltage range: 95 V…270 V
 Rated mains frequency f
n
: 50 Hz, 60 Hz
 Operating frequency range: 45…65 Hz
RCD trigger and response time test t
A
(for measurement function t
A
)
Test range according to IEC 61557-6: 0ms ... to the upper limit of displayed value
Type
of RCD
Setting
of multi-
ple val-
ues
Test range
Resolution
Basic
uncertainty
General
and
short-time delay
type
0.5 I
n
0..300 ms (TN/TT)
0..400 ms (IT)
1 ms
±(2% m.v. + 2 digits)
1)
1 I
n
2 I
n
0..150 ms
5 I
n
0..40 ms
Selective
0.5 I
n
0..500 ms
1 I
n
2 I
n
0..200 ms
5 I
n
0..150 ms
1)
for I
n
= 10 mA and 0.5 I
n
uncertainty is ±(2% m.v. + 3 digits)
 Accuracy of differential current setting:
for 1*I
n
, 2*I
n
i 5*I
n
..................................................................... 0..8%
for 0.5*I
n
.................................................................................... -8..0%
Effective value of forced leakage current at measurement of RCD [mA] disconnection time
I

n
Multiplication factor setting
0.5
1
10
5
3.5
3.5
5
10
20
20
20
30
15
10.5
10.5
15
30
42
42
60
100
50
35
35
50
100
140
140
200
300
150
105
105
150
300
420
420
600
500
250
175
175

500
700
700
1000*
1000
500



1000



I

n
Multiplication factor setting
2
5
10
20
40
40
40
50
100
100
100
30
60
84
84
120
150
210
210
300
100
200
280
280
400
500
700
700
1000*
300
600
840
840





500
1000







1000








* - does not apply to U
n
= 110 V, 115 V and 127 V and IT network

Sonel MPI-540 Specifications

General

Brand	Sonel
Model	MPI-540
Category	Measuring Instruments
Language	English