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UMG 511
Frequency measurement
The UMG511 needs the network frequency to
measure and calculate measurement values. The
network frequency must be in a range between
15Hz and 440Hz.
For automatic ascertainment (wide range) of the
frequency, an L1-N voltage larger than 10Veff must
be applied to the voltage measurement input V1.
The measurement of power frequency happens
only at the measuring inputs of the main measure-
ment (V1, V2, V3).
Measurement voltages and measu-
rement currents must come from the
same network.
m
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