MI 3321 MultiservicerXA
All tests operating mode
170
Low line impedance measuring procedure
Connect
Impedance adapter to the instrument (see
figure
above
).
Select the
Z-LINE
function.
Enable and set
fuse
type (optional).
Power
ON
the Impedance adapter (ON/OFF key, green LED lits).
Connect
Impedance adapter to tested installation.
Press the
TEST
key for measurement.
Store
the result (optional).
Impedance L - N
Impedance L - L
Examples of low line measurement results
Displayed results:
Z ............................ Line / loop impedance,
I
SC
.......................... Prospective short-circuit current,
R ............................ Resistive part of line impedance,
Xl ........................... Reactive part of line impedance.
The following parameters are displayed in sub-screen for single-phase line impedance
measurement:
IscMaxL-N ............. Maximum prospective short-circuit current.
IscMinL-N .............. Minimum prospective short-circuit current.
IscStd ..................... Standard prospective short-circuit current.
When testing phase-to-phase line impedance the following parameters are displayed in
sub-screen:
IscMax3Ph ............. Maximum three-phase prospective short-circuit current.
IscMin3Ph .............. Minimum three-phase prospective short-circuit current.
IscMax2Ph ............. Maximum two-phase prospective short-circuit current.
IscMin2Ph .............. Minimum two-phase prospective short-circuit current.
