MI 3143 Euro Z 440 V
Technical specifications
27
9.4 Test Current
Measurement function ........................................ Z line mΩ, Z loop mΩ, High Current, Utouch
Test Current (I
test
) is set as follows:
𝐼
𝑡𝑒𝑠𝑡
=
𝑈
𝑎𝑐
𝑇𝑒𝑠𝑡_𝑙𝑜𝑎𝑑 + 𝑅_𝑙𝑒𝑎𝑑𝑠 + 𝑅_int
± 15 %
Test voltage (U
ac
) ..................................................... 40 V … 470 Vac
Test load parameter ................................................ 33.3 %, 66.6 %, 100%
Test current duration .............................................. depends on the system frequency
R_leads .................................................................... C1 and C2 test leads resistance
R_int ........................................................................ internal resistance or impedance of the power source
Figure 9.1: Typical test currents (AC Load) in relation to nominal voltage and test load
Internal variable load power resistor with 3-stage value setup.
Test load parameter
Equivalent load resistance
33.3 %
5.50
66.6 %
2.75
100 %
1.83
Note:
Test leads resistance for standard suppled leads C1 + C2 is typ. 60 mΩ (red leads 2.5 m, 1.5 mm
2
).
