產品介紹∣繞組歐姆計

3個繞組電阻測量通道。
1個溫度測量通道。
精度0.1%。
輕量。
有載分接頭切換器的操作驗證。
溫升試驗的自動電阻測量。
快速自動消磁。
自動放電電路。
變壓器繞組電阻、旋轉機械電阻測量。
4種機型：RMO10TW、RMO20TW、RMO30TW、RMO50TW。
應用：
- 3通道繞組電阻測量，可同時進行單相最多3個繞組的繞組電阻測量。
- 可在單相偵測有載分接頭切換器操作中斷的問題。
- 溫升試驗，可得到冷卻過程中的熱點溫度及電阻圖形。
系統介紹：
- 繞組歐姆計RMO-TW系列的設計，專用於執行電感性設備的繞組電阻測量。
- 採取最尖端技術，使用當今最先進的開關模式技術、輕量、精度0.1%、測試電流最高可達50A。
- 可產生真正DC無漣波電流，進行自動調節的測量及具備自動放電電路。
- 可執行簡單、快速、可靠的變壓器有載分接頭切換器驗證。可測量有載分接頭切換器每個分接頭位置的繞組電阻，而不用在測試之間放電，並可藉由這些測量，偵測出有載分接頭切換器的切換問題，例如中斷，並將結果顯示於背光LCD顯示幕。
DV-Win軟體：
- 可從電腦控制、觀察測試過程及儲存與分析測試結果。
- 提供可選擇為Excel工作表、PDF、Word或ASCII格式的測試報告。
- 可透過分析代表分接頭切換器轉換過程中的動態電阻值的圖形，而提供有載分接頭切換器的狀態評估。
- 可測量及計算有載分接頭切換器每個分接頭切換操作的轉換時間、漣波及繞組電阻。
- 也可執行溫升試驗必要的計算。
- 標準配備USB介面，可選購RS232介面。

繞組電阻測量：
- 測試電流：
  - RMO10TW ：5mA～10A DC。
  - RMO20TW ：5mA～20A DC。
  - RMO30TW ：5mA～30A DC。
  - RMO50TW ：5mA～50A DC。
- 輸出電壓：最高達55V DC。
- 測量範圍：0.1μΩ～10kΩ。
- 典型精度：
  - 範圍0.1μΩ～1.999kΩ：±（0.1% rdg + 0.1% F.S.）。
  - 範圍2kΩ～10kΩ：±（0.2% rdg + 0.1% F.S.）。
解析度：
- 0.1μΩ～999.9μΩ：0.1μΩ。
- 1.000mΩ～9.999mΩ：1μΩ。
- 10.00mΩ～99.99mΩ：10μΩ。
- 100.0mΩ～999.9mΩ：0.1mΩ。
- 1.000Ω～9.999Ω：1mΩ。
- 10.00Ω～99.99Ω：10mΩ。
- 100.0Ω～999.9Ω：0.1Ω。
- 1.000kΩ～9.999kΩ：1Ω。
資料儲存：1000個內部儲存位置。
印表機（選購）：
- 感熱式印表機。
- 紙張寬度：80mm。
有載分接頭切換器動態電阻測量：
- 取樣率：4ms。
- 自動開路偵測及警示。
- 轉換電流漣波測量。
- 轉換時間測量（使用DV-Win軟體）。
- 不同轉換切換的時間測量（使用DV-Win圖形分析工具）。
電腦介面：
- USB。
- 選購：RS232。
詳細規格、配件、軟體及選購，歡迎洽詢。

Three resistance measurement channels
One temperature measurement channel
Accuracy 0,1 %
Lightweight
On-load tap changer verification
Automatic resistance measurement for the Heat Run test
Rapid automatic demagnetization
Automatic discharge circuit
Resistance measurement of transformers, rotary machines
Four models: RMO10TW, RMO20TW, RMO30TW, RMO50TW
Application:
- Three-channel winding resistance measurement, which enables simultaneous winding resistance measurement of up to three windings on a single phase
- Detection of interruptions during the operation of on-load tap changers (OLTC), performed on a single phase
System Overview:
- Heat Run test, which enables obtaining the Hot Spot temperature along with resistance graph during the cooling process
- The Winding Ohmmeter of the RMO-TW series is designed for winding resistance measurement of inductive objects.
- The RMO-TW instrument is based on the state of the art technology, using the most advanced switch mode technology available today. The RMO-TW instrument is accurate (0,1%), powerful (up to 50 A) and lightweight.
- It generates a true DC ripple free current with automatically regulated measurement and discharging circuit.
- RMO-TW instrument can perform a simple, quick and reliable transformer on-load tap changer verification.
- This instrument enables measurements of a winding resistance in every tap position of an on-load tap changer without discharging between the tests. Problems with switching of the OLTC, such as interruption, can be detected with these measurements. The results are displayed on a backlit LCD display.
DV-Win software:
- The DV-Win software enables control and observation of the test process, as well as saving and analyzing the results on a PC.
- It provides a test report, arranged in a selectable form as an Excel spreadsheet, PDF, Word, or ASCII format.
- The software provides an OLTC (tap changer) condition assessment through analysis of the graphs representing dynamic resistance values during the tap changer transitions.
- Additionally, the DV-Win measures and calculates the OLTC transition time, the ripple and the winding resistance for each tap changing operation.
- The software can also perform the calculations necessary for the “Heat Run” test.
- The standard interface is USB. RS232 is optional.

Winding Resistance Measurement:
- Test currents:
  - 5 mA – 10 A DC for RMO10TW
  - 5 mA – 20 A DC for RMO20TW
  - 5 mA – 30 A DC for RMO30TW
  - 5 mA – 50 A DC for RMO50TW
- Output voltage: up to 55 V DC
- Measurement range: 0,1 μΩ - 10 kΩ
- Typical accuracy:
  - ±(0,1% rdg + 0,1% F.S.) for 0,1 μΩ-1,999 kΩ range
  - ±(0,2% rdg + 0,1% F.S.) for 2 kΩ - 10 kΩ range
Resolution:
- 0,1 μΩ – 999,9 μΩ: 0,1 μΩ
- 1,000 mΩ – 9,999 mΩ: 1 μΩ
- 10,00 mΩ – 99,99 mΩ: 10 μΩ
- 100,0 mΩ – 999,9 mΩ: 0,1 mΩ
- 1,000 Ω – 9,999 Ω: 1 mΩ
- 10,00 Ω - 99,99 Ω: 10 mΩ
- 100,0 Ω – 999,9 Ω: 0,1 Ω
- 1,000 kΩ – 9,999 kΩ: 1 Ω
Data Storage: 1 000 internal memory positions
Printer (optional):
- Thermal printer
- Paper width 80 mm
OLTC Dynamic Resistance Measurement:
- Sampling rate: 4 ms
- Automatic open circuit detection and warning
- Transition current ripple measurement
- Transition time measurement using DV-Win software
- Timing measurement of different transition changes using DV-Win graph analysis tool
Computer Interface:
- USB
- Optional: RS232
Please feel free to contact for detailed specifications, accessories, software and options.