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UMG 511
Nominal frequency
The UMG511 determines the mains frequency
from the voltage applied to L1 and uses this for
the additional calculations.
The rated frequency is required as a reference for
measurement of the voltage quality.
Configure the rated frequency for the mains on the
UMG511 prior to starting measurement.
Select mains frequency 50Hz or 60Hz for
measuring the power quality in accordance with
EN61000-4-30 and EN50160.
Setting range of nominal frequency:
• 50Hz (factory pre-setting)
• 60Hz
• 15Hz .. 440Hz (wide range)
For measurements in networks with other network
frequencies e.g. 16 2/3Hz or 400Hz, the nominal
frequency must be set to “wide range”.
C
In order to determine the mains
frequency, a voltage of greater
than 10Veff must be applied to
voltage measurement input V1.
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