MI 3122 Smartec Z Line-Loop / RCD
Voltage, frequency, phase sequence
35
Voltage measurement procedure
Select the
VOLTAGE TRMS
function using the function selector switch.
Connect
test cable to the top of the instrument.
Connect
test leads to the item to be tested (see
figures 5.15 and 5.16
).
Store
current measurement result by pressing the MEM key (optional).
Measurement runs immediately after selection of
VOLTAGE TRMS
function.
Figure 5.17: 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.
