Martindale ET4000 / ET4500 Measurements
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5 Measurements
5.1 Voltage, frequency and phase sequence
Voltage and frequency measurement is always active in the terminal voltage monitor. In
the special VOLTAGE TRMS function the measured voltage, frequency and
information about any detected three-phase connection can be stored. Three-phase
measurements conform to BS EN 61557-7.
See chapter 4.3 Function selection for instructions
on key functionality.
Figure 5.1: Voltage in a single
phase system
Connections for voltage measurement
Figure 5.2: Connections of test leads in a three-phase system
Figure 5.3: Connection of plug test cable and test leads in a single-phase system
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