METREL MI 3122 Instruction Manual page 35

MI 3122 Smartec Z Line-Loop / RCD
Voltage measurement procedure
Select the
VOLTAGE TRMS

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
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.
Voltage, frequency, phase sequence
function using the function selector switch.
VOLTAGE TRMS
35
function.