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* MTO 210 產品簡介
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進口MTO210變壓器歐姆表變壓器MTO 210直流電阻測試

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MEGGER AVO變壓器測量分析儀器儀表總攬

MTO 210變壓器直流電阻測試儀

一、MTO 210變壓器直流電阻測試儀主要特點:

  • 直接數字讀數
  • 內置放電電路
  • 內置消磁電路
  • 雙向測試能力(減少測試時間)
  • 兩獨立測試通道
  • 帶載分接變換器測試操作
  • 可升級式硬件
  • 含PowerDB lite 軟件

二、產品特征:

  • 直接數字讀數,節省時間,不需平衡。
  • 內置放電裝置,測試完或導線接錯或儀表電源掉電時安全放電。
  • 可同時測量變壓器高低繞組的直阻。
  • 敏感的浪涌探測電路監控斷路前分接變換器適當的接觸操作,如開路時,儀表迅速關閉。
  • 四端橋路提供高精度,不再需要補充導線。
  • 電子發生和調節電路迅速克服了高感應,可以很快測量,等測試電流穩定可顯示測量結果。
  • 寬阻抗范圍適合檢測各種變壓器。
  • 輕便,易攜帶。
  • 過溫保護具有自動斷電和LED顯示防止儀器損壞。
  • 儀器和附件裝在可以運輸的箱內。

    可測量各式變壓器及旋動機械裝置的直流電阻值,它也可測量在各連接處接點處及控制線路的低直流電阻值。
    此測試裝置也能檢查帶載分接變換器的適當操作,這包括斷路操作的閉合和接觸電阻的測量。

三、產品應用:

  • 驗證廠內測試讀數;
  • 作為定期維修的部分項目;
  • 對有載分載開關進行聯通檢查;
  • 協助定位變壓器的現在缺陷,如松連接。

    用該設備在定期維修時極為有效的測量繞組阻撓。如選定基準,可比較一系列測試結果來決定變壓器中的變。一繞組中的直流阻抗變化,表明短接、固定不牢或分接開關的虛接。

變壓器歐姆表通常用于以下設備的測試:
1)功率變壓器
2)配電變壓器
3)儀表變壓器
4)輔助控制繞組
5)步進調壓器
6)電動機
7)發電機
8)斷路器觸點
9)各種連接(栓接、焊接、壓接等)
    此測試裝置也能檢查帶載分接變換器的適當操作,這包括斷路器操作的閉合和接觸電阻的測量。

特性和優點

儀器規格
輸入:
120/230 V ±10%, 50/60 Hz, 350 VA

輸出:
電流量程:高達10A(d.c.)
開路測試電壓:50Vd.c.

量程
阻抗: 1 μΩ 到 2000 Ω
精確度: 讀數的±0.25%,全量程的±0.25%
過量程: 可顯示

環境
操作: 0 to 50°C
儲存:┐0 to +65°C
濕度:90%
顯示:兩高溫,18┨ 3 1/2液晶數字顯示,速率大約每秒三次
儀器尺寸:216 H X 546 W X 330 D mm
儀器重量: 大約14 kg
打印:可以通過可選的4 inch的熱敏打印機打印

DESCRIPTION
The MTO210 Transformer Ohmmeter is a line-operated, field-portable instrument designed specifically to measure the dc resistance of all types of magnetic windings safely and accurately. It can test transformers and rotating machine windings and perform low-current resistance measurements on connections, contacts and control circuits.
The dual set of potential inputs measures the resistance of the primary and secondary windings of a single- or three-phase transformer simultaneously. This dual reading, dual injection characteristic, also helps to speed up the measurements when used to test LV windings on large three-phase power transformers.
The Transformer Ohmmeter is extremely useful when testing the windings and contact resistance of tap-changers with “make-before-break” contacts and voltage regulators. This action will check for pitted or misaligned contacts as the instrument will give an indication if either condition occurs.
Users are also protected by the auto-shutdown safety feature. Any inadvertent disconnection of a test lead or loss of power to the instrument will safely discharge the energy stored in the unit under test (UUT).

APPLICATIONS
The MTO210 Transformer Ohmmeter is used:
Ÿ To verify factory test readings.
Ÿ As part of a regular maintenance program.
Ÿ To help locate the presence of defects in transformers, such as loose connections.
Ÿ To check the “make-before-break” operation of on-load tap-changers.
A regular maintenance program that includes winding resistance measurements is the most effective way to use this instrument. Once a benchmark is established, subsequent test results can be compared to determine if changes are occurring in the transformers and associated control wiring, voltage regulators, motors, generators, breaker contacts, and all types of connections (bolted, soldered, crimped, etc.).
Tap-changers are mechanical devices and the most vulnerable part of a transformer. Tap-changers result in more failures and outages than any other component and so require frequent testing and attention to ensure reliable and safe operation.

FEATURES AND BENEFITS
Ÿ Direct 2-channel digital reading allows for testing two windings at a time.
Ÿ Very fast discharge time.
Ÿ High-contrast, large alphanumeric displays can be seen in bright sunlight.
Ÿ User-selectable maximum current range ensures protection of small transformers.
Ÿ Beacon drive circuit is provided for use with optional beacon strobe light.
Ÿ Built-in demagnetization circuitry allows the operator to de-magnetize the transformer core upon completion of resistance testing, or as a stand-alone feature before SFRA testing or when the transformer is put back in service.
Ÿ The MTO210 allows for test of transformers with on-load tap-changers and provides a “break-before-make” indicator, in the event of any discontinuity.
Ÿ For those users who choose to create an external interlock safety perimeter, a safety interlock circuit is provided.
Ÿ Remote trigger switch is also provided for testing transformers with tap-changers.
Ÿ Internal flash memory allows for mass storage of dataset records, for later recall, printing, and analysis.
Ÿ Ruggedized clamps, with 4 inch (100 mm) jaws, are provided eliminating the need for bushing adapters.
Ÿ Kelvin clamps/cables (optional) for easy connection to the transformer
Ÿ Compatible with Power DB software package.
Ÿ Built-in discharge circuit safely discharges the specimen when test is completed, if lead accidentally disconnects, or if power is lost.
Ÿ Output RS232 serial port is provided for optional printing of results and/or data analysis on a PC.
Ÿ Detachable lid for ease of use.
Ÿ Unit can be operated while in transit case.
Ÿ Leads can stay connected while in transit case.


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