Manual

GSC53N - GSC57 - ZG47

EN - 21

6.2. M : INSULATION RESISTANCE MEASUREMENT WITH 50V, 100V, 250V,

500V, 1000V TEST VOLTAGE

WARNING

Before effecting the insulation test make sure that the circuit under test is not

energised and all the loads are disconnected.

Turn the switch on M position.

The key F1 permits to select one of the following measuring modes:

 Mode "MAN" (Manual mode). Recommended test.

 Mode "TMR" (Timer mode: test duration depends on the selected interval

from 10 to 999 seconds). This test can be executed when the test

required a defined duration.

6.2.1. Measurement Procedure

1. Select the desired mode by means of the F1 key.

2. Connect the test leads to the instrument input terminals B1 and B4 respectively,

B4B1

Example: insulation measurement between phase and

earth in an electrical installation using untied cables.

B2 B3 B4B1

I1 I2 I3

Example: insulation measurement between

phase and earth in an electrical installation

using the shuko cable.

3. If the cables supplied with the instrument are not long enough for the measurement

you can extend the blue cable.

4. Connect the instrument terminals to the object which is to be submitted to the

insulation test after de-energizing the circuit under test and all the relative

loads (see previous picture).

5. By means of F2 select the test voltage suitable for the type of test to be carried

out (see Table1). The values to be selected are:

50V (test on telecommunication system)

100V

250V

500V

1000V