产品特性

1.电压电流输出灵活组合  

输出达6相电压6相电流，可任意组合实现常规4相电压3相电流型、6相电压型、6相电流型，以及12相型输出模式，既可兼容传统的各种试验方式，也可方便地进行三相变压器差动试验和厂用电快切和备自投试验。

2.操作方式  

装置直接外接笔记本电脑或台式机进行操作，方便快捷，性能稳定。

3.新型高保真线性功放  输出端一直坚持采用高保真、高可靠性模块式线性功放，而非开关型功放，性能。不会对试验现场产生高、中频干扰，而且保证了从大电流到微小电流全程都波形平滑精度优良。

4.高性能主机  

输出部分采用DSP控制，运算速度快，实时数字信号处理能力强，传输频带宽，控制高分辨率D/A转换。输出波形精度高，失真小线性好。采用了大量*技术和精密元器件材料，并进行了专业化的结构设计，因而装置体积小、重量轻、功能全、携带方便，开机即可工作，流动试验非常方便。

5.软件功能强大  

可完成各种自动化程度高的大型复杂校验工作，能方便地测试及扫描各种保护定值，进行故障回放，实时存储测试数据，显示矢量图，联机打印报告等。6相电流可方便进行三相差动保护测试。

6.具有独立直流电源输出  设有一路110V 及 220V可调直流电源输出。

7.接口完整  

装置带有USB通讯口，可与计算机及其它外部设备通信。

8.完善的自我保护功能  

散热结构设计合理，硬件保护措施可靠完善，具有电源软启动功能，软件对故障进行自诊断以及输出闭锁等功能。

NA556A系列微机继电保护测试仪采用单机独立运行，亦可联接笔记本电脑运行的*结构。主机内置新一代高速数字信号处理器微机、真16位模块、新型模块式高保真大功率功放，自带大屏幕液晶显示器以及灵活方便的旋转鼠标控制器。单机独立操作即已具有很强的功能，可进行大多数试验，联接电脑运行则具有更强大的操作功能。体积小、精度高。既具有大型测试仪*的性能、*的功能，又具有小型测试仪小巧灵活、操作简便、可靠性高等优点，性能价格比高，是继保工作者得心应手的好工具。

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