Wicklungswiderstandsmessgerät für Dreiphasentransformatoren DV Power TWA25A

As one of the main parts of an electrical substation, a power transformer must be reliable and operative 24 hours a day, 7 days in a week. Proper maintenance of the electrical transformer is beneficial in order to increase safety and detect problems before they become too dangerous. It also helps to reduce maintenance expences.One of the most important maintenance test of power transformers is winding resistance measurement. The Three-Phase Winding Ohmmeter DV Power TWA25A is a device that provides the possibility of six-winding resistance measurement of both High Voltage and Low Voltage side performed with a single cable connection. It is also capable to perform the three-phase automatic transformer demagnetization. TWA25A can generate up to 25 A fully filtered DC ripple-free test current. Both the injection of the current and the discharge of energy from the magnetic circuit are automatically regulated. The demagnetization of the transformer is useful for removing remanent magnetism which can cause problems such as invalid frequency response and excitation current measurements or an increased inrush current at start-up of a power transformer.The Three-Phase Winding Ohmmeter DV Power TWA25A typical aplications are: A six-winding measurement of transformer winding resistances A three-phase or single-phase automatic transformer demagnetization Both HV and LV side are connected at once with the use of two sets of four cables. The connection to the transformer is made using two-contact clamps that provide the four-wire Kelvin test method. Official DV-Win software is included in the purchasing price of the The Three-Phase Winding Ohmmeter DV Power TWA25A. Using the software a test can be controlled, performed and observed from a PC (or notebook) and the results can be saved directly on a PC. Also, with using the DV Win software the results can be arranged, exported and printed for a report.