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Metrel MI 3102 BT - Eurotest XE Manual

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MI3002 MI3100 MI3102 IT supply systems
91
B.3 Measurement guides
The user has to select the IT supply system in the instrument before testing it. The
procedure for selecting the IT supply system is defined in chapter 4.5.1 Supply system
setup. Once the IT system is selected the instrument can be used immediately. The
instrument keeps selected IT system when it is turned off.
The table below contains functions of the MI 3102 instrument including compatibility
notes related to IT system.
IT system functions Notes
Contunuity functions
RLOWΩ
Continuity Independent of selected supply system.
Insulation Independent of selected supply system.
Line impedance
Line impedance Impedance ZL1-L2.
Prospective short circuit
current
IPSC for rated UL1-L2.
Fault loop impedance Not applicable.
Fault loop impedance
Prospective fault current
Voltage, frequency Symbols modified for IT system.
Phase rotation Three-phase system automatic detected.
RCD functions Partially applicable.
Contact voltage UC Not applicable.
Trip-out time
Trip-out current
Automatic test
Bypassing principle shown in figure B.3.
Earth resistance Independent of selected supply system.
PE test probe Active, but does not inhibit selected test if voltage is
detected.
B.3.1 Voltage
Figure B.2: Example of voltage and frequency measurements
Displayed results for single phase system:
L1-L2......Voltage between line conductors,
L1-pe......Voltage between line 1 and protective conductor,
L2-pe......Voltage between line 2 and protective conductor.
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