CARLO GAVAZZI EN61036 Manual do Utilizador descarregar pdf (Página 19)

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Useful information

Reset of the meters

List of the variables

The variables measured by the instrument are

correct if the polarities of the inputs have

been observed (as shown in the figure be-

low); if not, measuring and retransmission

errors may occur due to the wrong direction

of the current flowing in the primary / second-

ary of the connected current transformer.

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Setting Examples

Example 1 “Analogue output”: take the measure of a power

consumed up to 100kW, and retransmit it with a signal from 4

to 20 mA; the module to be used is AO2920 (from 0 to 20mA),

the instrument must be set as follows:

• VAr: (variable), WΣ (system active power)

• LoE: (minimum electrical scale) 0.0 K; the K and M multiples

are automatically selected by the instrument according to

the selected VT and CT values;

• HiE: (maximum electrical scale) 100.0 K; the K and M

multiples are automatically selected by the instrument ac-

cording to the selected VT and CT values;

• LoA: (minimum electrical scale of the analogue output)

20.0% for 4mA, the calculation to be carried out is: (mini-

mum output value/ full scale output value)*100 = (4mA/

20mA)*100 = 20%

• HiA: (maximum electrical scale of the analogue output)

100.0% for 20mA, the calculation to be carried out is:

(maximum output value / full scale output value)*100 =

(20mA/20mA)*100 =100%

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CARLO GAVAZZI EN61036 Manual do Utilizador Página 19