Measurements - A.c. Lv It Installations; Voltage, Frequency And Phase Sequence - METREL EurotestIM Instruction Manual

Measurements – a.c. LV IT installations
MI 3110 EurotestIM
5 Measurements – a.c. LV IT installations

5.1 Voltage, frequency and phase sequence

Voltage and frequency measurement is always active in the terminal voltage monitor. In
the special VOLTAGE TRMS menu the measured voltage, frequency and information
about detected three-phase connection can be stored. Measurements are based on the
EN 61557-7 standard.
See chapter 4.2 Function selection for instructions on
key functionality.
Figure 5.1: Voltage in single
phase system
Test parameters for voltage measurement
There are no parameters to be set.
Connections for voltage measurement
Figure 5.2: Connection of 3-wire test lead in three-phase IT system
Figure 5.3: Connection of 3-wire test lead in single-phase IT system
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