產品特性

1.電壓電流輸出靈活組合  

輸出達6相電壓6相電流，可任意組合實現常規4相電壓3相電流型、6相電壓型、6相電流型，以及12相型輸出模式，既可兼容傳統的各種試驗方式，也可方便地進行三相變壓器差動試驗和廠用電快切和備自投試驗。

2.操作方式  

裝置直接外接筆記本電腦或臺式機進行操作，方便快捷，性能穩定。

3.新型高保真線性功放  輸出端一直堅持采用高保真、高可靠性模塊式線性功放，而非開關型功放，性能。不會對試驗現場產生高、中頻干擾，而且保證了從大電流到微小電流全程都波形平滑精度優良。

4.高性能主機  

輸出部分采用DSP控制，運算速度快，實時數字信號處理能力強，傳輸頻帶寬，控制高分辨率D/A轉換。輸出波形精度高，失真小線性好。采用了大量*技術和精密元器件材料，并進行了專業化的結構設計，因而裝置體積小、重量輕、功能全、攜帶方便，開機即可工作，流動試驗非常方便。

5.軟件功能強大  

可完成各種自動化程度高的大型復雜校驗工作，能方便地測試及掃描各種保護定值，進行故障回放，實時存儲測試數據，顯示矢量圖，聯機打印報告等。6相電流可方便進行三相差動保護測試。

6.具有獨立直流電源輸出  設有一路110V 及 220V可調直流電源輸出。

7.接口完整  

裝置帶有USB通訊口，可與計算機及其它外部設備通信。

8.完善的自我保護功能  

散熱結構設計合理，硬件保護措施可靠完善，具有電源軟啟動功能，軟件對故障進行自診斷以及輸出閉鎖等功能。

NA556A系列微機繼電保護測試儀采用單機獨立運行，亦可聯接筆記本電腦運行的*結構。主機內置新一代高速數字信號處理器微機、真16位模塊、新型模塊式高保真大功率功放，自帶大屏幕液晶顯示器以及靈活方便的旋轉鼠標控制器。單機獨立操作即已具有很強的功能，可進行大多數試驗，聯接電腦運行則具有更強大的操作功能。體積小、精度高。既具有大型測試儀*的性能、*的功能，又具有小型測試儀小巧靈活、操作簡便、可靠性高等優點，性能價格比高，是繼保工作者得心應手的好工具。

Product characteristics

1. Flexible combination of voltage output and current output

The output voltage and output current can reach six-phase, and also can arbitrary combine with regular four-phase voltage and three-phase current, six phase voltage, six phase current, and 12-phase output mode. It not only compatible with the traditional way of various tests, but also used for three-phase transformer differential test and auxiliary power fast switch over and automatic transfer test easily.

2. Operation

This device can contact the laptop and notebook computer to operate directly, is convenient and stable performance.

3. Newly high-fidelity linear amplifier

The output terminal always adopt modular linear amplifier with high-fidelity and high reliability, not use switching amplifier. Testing on site will not generate medium or high frequency interference, and guaranteed the smooth and precision waveform which from high-current  to small-current.

4.High-performance of host

The output part adopt DSP control, high speed of calculation, powerful real-time digital signal processing capability, widely transmission frequency, controlled high-resolution D / A converter. High precision of output waveform, good linearity distortion. Adopting lots of advanced technology and precision components materials, and with professional structural designed, which make the device small, light, full-functions, easy to carry, boot to use, and the flow testing is very convenient.

5.Powerful software function

It can complete a variety of large and complex calibration task with highly automatization, that can test and scan varies protection value easily, make fault recurrence, real-time storing of test data, display vector and online printing reports. 6-phase can test three-phase differential protection conveniently.

6.Separate and special DC power output

Setting 110V and 220V special adjustable DC power output.

7.Compley interface

The device has a USB interface to communicate with computers and other external devices.

8.Perfect self-protection function

Reasonable thermal structure designs, comprehensive and reliable hardware protection measures, with a power soft-start function and functions of software self-diagnostics and fault output latch.

Power supply: AC110V/115V/120V/127V/220V/230V/240V optional

Input frequency: 50Hz/60Hz optional