Operation Manual

44 GMC-I Messtechnik GmbH

4.5 Capacitance Measurement and

Determination of Dielectric Discharge (optional)

Capacitance measurement is performed with adjustable test volt-

age by charging with constant current. The measurement is per-

formed with automatic range selection. One of the nominal test

voltages (U

nom

), or a freely selectable test voltage (U

var

) can be

used.

Dielectric Discharge Test (DD)

This test was developed for use with large machines and is per-

formed, as its name indicates, during discharge. It designates the

ratio of the discharge current after one minute and the product of

voltage by capacitance:

DD values > 4: Troubleshooting is required

DD values = 2 … 4 Maintenance is recommended

DD values < 2 DUT is OK, no immediate

action is required.

Application: Determination of the magnitude of absorbed contami-

nation or moisture

TEST

Select the Test

Open the Submenu

4.5.1 Setting Test Parameters

Set Parameters

For resetting parameter values to default setting, see page 22.

Disch

1min()

UC⋅

------------------------------

1000⋅=