METREL EurotestXE, Instruction Manual

Page: 36 / 114

MI 3102(H) BT Eurotest XE Measurements
36
Figure 5.7: Connection of 2.5 kV test lead (U
N
=2.5 kV)
Insulation resistance measuring procedure

Select the R ISO function using the function selector keys.

Set the required test voltage .

Enable and set limit value (optional).

Disconnect tested installation from mains supply (and discharge insulation as required).

Connect test cable to the instrument and to the item to be tested (see

Figure 5.6 and

Figure 5.7 ).
Different test cable must be used for testing with nominal test voltage U
N
≤ 1000 V and
U
N
= 2500 V. Also different test terminals are used.
The standard three-wire test lead, schuko test cable or plug / tip commanders can be
used for the insulation test with nominal test voltages ≤ 1000 V. For the 2500 V
insulation test the two wire 2.5 kV test lead should be used.

Press the TEST key to perform the measurement (double click for continuous
measurement and later press to stop the measurement).

After the measurement is finished wait until tested item is fully discharged.

Store the result by pressing the MEM key (optional).
Figure 5.8: Example of insulation resistance measurement result
Displayed results:
R .............. insulation resistance
Um ........... test voltage (actual value)