DV Power TRT03 매뉴얼 - 페이지 10

{카테고리_이름} DV Power TRT03에 대한 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. DV Power TRT03 19 페이지. Three-phase transformer turns-ratio test instrument

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TRT03

If the name plate voltages are not entered, TRT03 will perform the test and display the results, but it will not

calculate or display the turns ratio deviation. After the name plate voltages and tap changer position(s) are

entered, press

to confirm a selection. The next display allows a selection of the test voltage.

ENTER

Figure 3-2:

The test voltage

selection

TRT03 generates single-phase test voltage. TRT03 supplies a single-phase excitation test voltage to each

of the three transformer primary windings in turn. The induced voltages across each of the corresponding

unloaded transformer windings are then measured. The ratio of these voltages is calculated and presented

on the display. It is repeated for all three phases.

Test voltage of 8 V and 10 V is recommended for current transformers (CT) testing. For testing distribution

or power transformers it is recommended to use the highest test voltage of 100 V or 80 V. Otherwise a test

voltage of 40 V can also be used. Pressing

confirms it by pressing

ENTER

TRT03 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 TRT03. In case TRT03 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).

Selection of Test Reading or Test Record is performed by using

selection.

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 TRT03 is now ready to start the test. Press

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

CONFIGURATION menu is displayed) will interrupt (abort) the test. When the test is completed, TRT03

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

can choose whether to test the next tap or to finish the test.

M-T003NN-205-EN

UP/DOWN

is used to scroll between the Test Reading and Test Record options.

SET

ENTER

to return to the previous menu.

STOP

the user selects the value of his/her choice and then

UP/DOWN

changes the status to the READY state.

. Once all the results are viewed, user

ENTER

Getting Started

. Pressing

confirms a

ENTER

to run a test. During

START

STOP

(the