電源

• 連接:根據IEC/EN60320-1; UL498, CSA 22.2
• 電源供應:90-264VAC
• 頻率:50/60 Hz
• 輸入功率:2250VA
• 保險絲：15 A / 250 V，type F，但不是用戶可更換的。

輸出數據

• 測試電流 5 mA – 60 A DC

顯示

• LCD 屏幕 :20 個字符， 4 行
• 帶背光的 LCD 顯示屏

界面

• USB（標準）
• RS232（可選）

尺寸及重量

• 尺寸（寬 x 高 x 深）： 480 x 190 x 385 mm
• 重量： 13.1 公斤

操作環境

• 工作溫度：20 ºC – + 55 ºC
• 儲存條件： -40 ºC – + 70 ºC
• 濕度：5 % – 95 % 相對濕度，非冷凝

適用標準

• 安裝/過壓類別：II
• 污染程度：2
• 安全：LVD 2014/35/EU（符合CE ） 標準 EN 61010-1:2010
• EMC：指令 2014/30/EU（符合CE ） 標準 EN 61326-1:2013

Description

DEM60R is a three-phase, fully automatic test set specially designed for transformer demagnetization. Transformer magnetic core demagnetization requires alternating current applied with magnitude decreasing to zero. DEM60R provides this alternating current by internally changing the polarity of a controlled DC current. During the demagnetization process the instrument supplies the current at decreasing magnitude for each step, following a proprietary software solution. DEM60R is based on a state-of-the-art technology, using the most advanced technique available today. The test set can be used to demagnetize single-phase and three-phase transformers.
For a three-phase operation, the instrument is connected to all the three phases of a transformer to be demagnetized. If specific vector diagrams are selected for different types of transformers, DEM60R will run a specific demagnetization procedure for each transformer type (i.e., single phase, delta, wye/star, zig-zag.) without a need to switch the test hookup cables.

Application

When suspecting remanent magnetism, or when various test results, like FRA or magnetization/excitation current, show possible remanence, DEM60R can be used to perform fully automatic demagnetization.

Benefits and Features

Eliminating Problems Created by Remanent Magnetism
After a DC current test, such as a winding resistance measurement, the magnetic core of a power or instrument transformer may be magnetized (remanent magnetism). Also, when disconnecting a transformer from service, some amount of magnetic flux trapped in the core could be present. The remanent magnetism can cause various problems such as erroneous diagnostics, inaccurate measurements on a transformer, an inrush current at a start-up of power transformer, or an incorrect operation of protective relays due to magnetized CT cores. To eliminate this source of potential problems, demagnetization should be performed.

DV-TR Software
The DV-TR software is included in the purchase price, and all its regular updates are free of charge. The software allows full control of DEM60R functions from a PC, is capable of plotting demagnetization current graph in a real time and provides results of remanent magnetism. The graphical display of demagnetizing current enables monitoring the transformer core demagnetization process. The generated graph can be saved on a computer. This option provides easy after-the-test analysis of the demagnetization process, in terms of current waveforms and values for each step, along with the duration of the complete process.