Sonel MPI-520 - 9 Dismantling and utilisation

MPI-520 OPERATING MANUAL version 3.4
56
Measurement of short circuit loop impedance Z
L-PE
, Z
L-N
, Z
L-L
Measurement of short circuit loop impedance Z
S
Test range according to IEC 61557:
Test lead
Test range Z
S
1.2 m
0.13...1999 
5 m
0.17...1999 
10 m
0.21...1999 
20 m
0.29...1999 
WS-03, WS-04
0.19...1999 
Display range:
Display range
Resolution
Basic uncertainty
0...19.99 
0.01 
(5% w.m. + 3 digits)
20.0...199.9 
0.1 
200...1999 
1 
 Nominal working voltage U
nL-N
/ U
nL-L
: 110/190 V, 115/200 V, 127/220 V, 220/380 V, 230/400 V,
240/415 V
 Working range of voltage: 95…270 V (for Z
L-PE
and Z
L-N
) and 95…440 V (for Z
L-L
)
 Nominal network frequency f
n
: 50 Hz, 60 Hz
 Working range of frequency: 45…65 Hz
 Maximum test current (for 415 V): 41.5 A (10 ms)
 Control of correctness of PE terminal connection by means of 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 
(5% + 5 digits) of Z
S
value
 Calculated and displayed for a value of Z
S
<20 
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