DV Power TRT30C Manuel - Page 12

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TRT30C

When generating a true three-phase test voltage, the TRT30C generates and provides a true three-phase

excitation test voltage to three transformer primary windings. The induced three-phase voltages across the

unloaded transformer windings are measured and the transformer turns ratio is calculated.

Test voltage of 8 V is recommended for current transformers (CT) testing. For testing distribution or power

transformers it is recommended to use the highest test voltage of 80 V. In addition, test voltage of 40 V can

also be used. Pressing

pressing

ENTER

The TRT30C automatically detects if it is connected to a DC power supply. It also automatically detects if

the power supply frequency is 50 Hz or 60 Hz. The frequency of the output voltage is the same as the

frequency of the power supply of the TRT30C. In case the TRT30C is connected to a DC power supply, the

user has to choose the frequency of the output voltage to be either 50 Hz or 60 Hz.

After the test voltage (and frequency) is selected, the user can select a memory location manually (Test

Reading and Test Record).

Test Reading or Test Record is performed by using

Test Reading can contain, for example, all the test results obtained in one tap changer position of the

transformer. Test Record can contain the results of all tap changer positions, or the complete results

obtained from one transformer.

Note: Manual selection of record/reading will delete results from the existing memory locations.

Once these parameters are defined, pressing

Figure 3-3:

The READY state

before the test

If one of the values has to be changed, press

The flashing green LED indicates that the TRT30C is now ready to start the test. Press

During the test, the red LED glows continuously signaling that the test voltage is applied. Pressing

(the CONFIGURATION menu is displayed) will interrupt (abort) the test. When the test is completed, the

TRT30C displays the test results. To scroll between all the results press

viewed, press

to test the next tap or to finish the test.

ENTER

If the AVGD option in the CONFIGURATION menu is selected, the TRT30C will try to automatically detect a

vector group of the transformer being tested. The user will be asked whether to continue the test with a

detected vector group or to select one of the available vector groups. If for some reason the vector group

cannot be detected, the device will display the message "Unable to detect vector group" and the test will be

aborted. Once the vector group is detected and confirmed, the TRT30C continues with the test. After the

test is finished, the TRT30C displays the test results. To scroll between all the results, the user will press

. Once all the results are viewed, the user can choose whether to test the next tap or to finish the

ENTER

test.

M-T030CN-203-EN

the user selects the value of his/her choice and then confirms it by

UP/DOWN

is used to scroll between Test Reading and Test Record use. Selection of

SET

ENTER

STOP

. Pressing

UP/DOWN

ENTER

changes the status to the READY state.

to return to the previous menu.

Getting Started

confirms a selection.

to run a test.

START

. Once all the results are

ENTER

STOP