Connection of the instrument 15
Manual econ sens3 Version 3.0
5.3 Voltage measurement connection
The econ sens3 Multifunctional Measuring Instrument can be used for voltage measurement in TN,
TT, and IT systems. The voltage measurement is designed for overvoltage category 300V CATIII
(rated surge voltage 4kV).
The econ sens3 is suited for voltage measurements in the frequency range of 45 to 65Hz. Fig. 5
shows the connection of the voltage measurement input to the network.
When connecting the voltage measurement, the following must be noted:
1.) Disconnect device:
An appropriate disconnect device must be installed upstream of the econ sens3 voltage
measurement input in order to disconnect the instrument from the current and voltage supply.
This disconnect device must be
● Installed close to the instrument and easy for the user to access
● Marked as disconnect device for the instrument.