DV Power TRT03 Руководство - Страница 5
Просмотреть онлайн или скачать pdf Руководство для Испытательное оборудование DV Power TRT03. DV Power TRT03 19 страниц. Three-phase transformer turns-ratio test instrument
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1.2 Power Supply
•
Supply TRT03 only from a power outlet equipped with a protective ground.
•
Besides supplying TRT03 from phase – neutral (L1-N, A-N), it may also be supplied from phase to
phase (e.g., L1-L2; A-B). However, the voltage must not exceed 264 V AC. Please refer to the section
"Technical Data".
•
TRT03 should be positioned in such a way that it is possible to safely disconnect it from the power
supply at any moment.
WARNING / AVERTISSEMENT
This is a class A product. In a domestic environment this product may cause radio interference in which
case the user may be required to take adequate measures.
Il s'agit d'un produit de classe A. Dans un environnement domestique, ce produit peut provoquer des
interférences radio, auquel cas l'utilisateur peut être amené à prendre des mesures adéquates.
1.3 Measurement Category
TRT03 is intended to be used for measurements in Measurement Category I (CAT I) for voltages up to
250V. The device is also designed to withstand occasional transient overvoltage up to 1000Vpk.
WARNING / AVERTISSEMENT
This equipment is classified as measurement category I, and must not be used within measurement
category II, III and IV.
Cet équipement est classée dans la I catégorie de mesure, et ne doit pas être utilisé pendant les
catégories de mesure II ,III et IV.
1.4 Intended Use
The Three-phase Transformer Turns Ratio Tester TRT03 is designed specifically for performing
measurements on power, distribution and measurement transformers as follows:
•
turns ratio measurement
•
phase shift measurement
•
excitation current measurement
These three tests are performed at the same time. TRT03 applies test voltage to HV transformer terminals
and measures induced voltage at LV transformer terminals. The ratio of these voltages is actually the turns
ratio of a transformer. At the same time, TRT03 measures the excitation current at the HV transformer side,
as well as the phase angle between the applied test voltage and induced voltage.
There are two ways to perform the measurements depending on the test object and a test voltage. If the test
object is a single-phase transformer or a current transformer, TRT03 provides a single-phase test voltage to
the transformer's primary side and measures the induced voltage at the transformer's secondary side.
If the test object is a three-phase transformer, TRT03 applies three single-phase test voltages in turns to the
transformer primary windings. Three induced voltages at the transformer's secondary side are measured.
Please note any use of TRT03 other than the ones described in this Manual are considered improper and
will void the device warranty.
M-T003NN-205-EN
5
Introduction