49
Figure 10.3
•
Voltage measurement: « Direct » or « Transformer ». If the network voltage is measured through a transformer,
select this setup and enter the transformation ratio
•
The device automatically selects the right caliber; you only have to specify the nominal voltage of the networks.
Beware: if this value is too different from the real voltage, this may lead to uncertainty and measurements over the
caliber
•
Current measurement: The same is worth as for voltage measurement; you select the current type of input (clamp,
shunt, transformer). In each configuration, you have to enter the associated parameters.
•
For "clamp": primary current, secondary voltage (these are current / voltage clamps)
•
For "transformer" (trans shunt): primary and secondary currents and value of the shunt
•
For "shunt": value of the shunt, in ohms
•
You also have to set the nominal current and voltage
•
Data acquisitions are synchronized with the calculation of frequency of channel 1.
10.3 Wiring and check
Direct display of the network wiring. Any wrong wiring may lead to wrong results. The colors of the channels match the
colors of the respective inputs.
The voltage inputs U1, U2 and U3 are connected to the terminals 1, 3 and 5. The current inputs I1, I2 and I3 are
connected to the terminals 2, 4 and 6.
Figure 10.4
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