MI 3101 EurotestAT: Measurements
Voltage, frequency, phase sequence
65
Voltage measurement procedure
Select the
VOLTAGE
function.
Connect
test cable to the instrument.
Connect
test leads to
the tested object (see
figures 5.28 and 5.29
).
Store
current measurement result (optional).
Measurement runs immediately after selection of
VOLTAGE
function.
Figure 5.30: Examples of voltage measurement in three-phase system
Displayed results for
single phase
system:
Uln...........Voltage between phase and neutral conductors,
Ulpe.........Voltage between phase and protective conductors,
Unpe........Voltage between neutral and protective conductors,
f ...............frequency.
Displayed results for
three-phase
system:
U12..........Voltage between phases L1 and L2,
U13..........Voltage between phases L1 and L3,
U23..........Voltage between phases L2 and L3,
1.2.3 ........Correct connection – CW rotation sequence,
3.2.1 ........Invalid connection – CCW rotation sequence,
f ...............frequency.
