NAZT全自动变压器直流电阻快速测试仪技术介绍

产品简介

全自动变压器绕组的直流电阻是变压器在交接、大修和改变分接开关后必不可少的试验项目，也是故障后的重要检测项目； 变压器直流电阻测试仪是变压器、互感器、发电机、电动机和线路等直流电阻的快速测试设备。

全自动变压器直流电阻测试仪是南澳电气在保持原有变压器直流电阻测试仪优点的基础上，将高精度电源与直流电阻测试集成为一体的新型仪器，极大缩小了仪器的体积与重量，扩大了测量范围。该仪器采用高性能单片机控制，操作简单，携带方便，测试速度快，精度高，复测性好，抗干扰能力强，自动完成稳流判断、数据采集处理和阻值显示，能够快速准确完成变压器直流电阻的测量，是发供电单位、变压器制造行业及大中型用电企业的理想测试产品。

南澳电气武汉有限公司开发的NAZT系列变压器直流电阻测试仪分为NAZT-3A、NAZT-5A、NAZT-10A、NAZT-20A、NAZT-40A、NAZT-50A、NAZT-100A等几种规格型号。

产品别名

直流电阻速测仪，变压器直流电阻测试仪，变压器绕组直流电阻测试仪，变压器直阻速测仪，变压器直阻快速测试仪，感性负载直流电阻速测仪，感性负载直流电阻快速测试仪，感性负载直流电阻测试仪

产品特性

输出电流大、测量范围宽、体积小、重量轻，操作简单；

■测试速度快、测量精度高、复测性好、抗干扰能力强;

■具有完善的保护电路和放电报警功能，减少误操作，可靠性强；

■采用高速微控制器，自动完成稳流判断、数据采集和阻值显示；

■采用192*64大屏幕液晶显示，室外显示清晰可见；

■内置大容量非易失性存储器，可存储500组测量数据；

■内置高精度实时时钟功能：可进行日期及时间校准。

■自带高速微型热敏打印机：可打印测量及历史数据。

注意事项

为了您和设备的安全，请操作人员仔细阅读以下内容:

① 在测量完感性负载时不能直接拆掉测试线，以免由于电感放电危及测试人员和设备的安全。本变压器直流电阻快速测试仪的输出端设有放电电路。关闭输出时，电感会通过仪器泄放能量。一定要在放电指示完毕后才能拆掉测试线。

② 对于无载调压变压器，不允许测量过程中切换分接开关。

③ 测量过程中如果电源突然断电，本变压器直流电阻快速测试仪会自动开始放电，请不要立刻拆卸接线，至少等待30秒钟后才可拆卸接线。

④ 测量时，其他未测试的绕组请勿短路接地，否则会导致变压器充磁过程变慢，数据稳定时间延长。

⑤ 开机前请检查电源电压:交流220V±10% 50Hz。

⑥ 试验时请确认被测设备已断电，并与其它带电设备断开。

⑦ 试验时机壳必须可靠接地。

⑧ 试验时不允许不相干的物品堆放在设备面板上和周围。

⑨ 更换保险管和配件时，请使用与本仪器相同的型号。

⑩ 本变压器直流电阻快速测试仪注意防潮、防油污。

Product introduction

Transformer DC Resistance Tester also named Low Resistance Ohmmeter, It is a necessary testing project for transformer transition, overhauling and changing tap switch, it is also an important detecting project after fault. Transformer DC Resistance Tester is a quick test equipment for testing transformers, generators, motors, lines and other DC resistance.

Transformer DC Resistance Tester is integrated high-precision power supply and DC resistance test in a whole as a new instrument, which not only maintain the original advantage but also greatly reduces the size and weight of the instrument and expands the measurement range. The instrument adopts the high-performance single-chip microcomputer control, simple operation, easy to carry, fast testing speed, high precision, good retest, strong anti-interference capability, automatically complete the judgment of steady flow, data acquisition and processing and display resistance, can accurately complete the measurement of transformer dc resistance, This instrument is the best testing equipment for power plant, power supply enterprises, medium and large-sized power transformer manufacturing industries and enterprises.

According to different level of current, Nanao Electric Wuhan Co., LTD has developed six types of Transformer DC Resistance Tester, they are NAZT-5A, NAZT-10A, NAZT-20A, NAZT-40A, NAZT-50A, NAZT -100A, etc.

Also called name

DC Resistance Rapid Tester, Transformer DC Resistance Tester, Transformer DC Resistance Rapid Tester, Transformer Winding DC Resistance Tester, Inductive Load DC Resistance Rapid Tester, Inductive Load DC Resistance Tester, Sensual loaded DC resistance tester.

The Characteristics of the products

1. Large output current, wide measuring range, small size, light weight, simple operation;

2. Fast test speed, high measurement accuracy, good retest capacity, strong anti-interference capability;

3. With perfect function of protection circuit and discharge alarm, reduce the wrong operation, good reliability;

4. Adopting high speed micro-controller to automatically complete the judgment of steady flow, data acquisition and processing and display resistance;

5. Using 192 * 64 large-screen LCD display, outdoor display is clearly visible;

6. Built-in high-capacity a non-volatile memory, can store 500 sets of measurement data;

7. Built-in high-precision real-time clock function, date and time can be calibrated.

8. With high speed micro thermal printer: can print measurement and historical data.

Attention should take for your safety, please read the following:

① After measured the inductive loaded, the testing line can not be removed directly, avoid the inductor discharge that may endanger the testers and equipment safety. The output of DC resistance quick tester set a discharge circuit. Once turn off the output, the inductor will discharge energy through the instrument. Be sure to remove the testing line after the discharge instructions is finished.

② For no-load tap changer, is not allowed to switch the tap during the measuring process.

③If power is off suddenly during the measuring process., the DC resistance quick tester will automatically start to discharge, do not remove wiring immediately, need to wait for least 30 seconds ,

④ In the process of measuring, other untested windings should not grounded short circuit, otherwise it will cause the transformer magnetizing process slowed down, the data stabilized longer.

⑤ Please checking the power supply voltage before starting: AC 220V ± 10% 50Hz.

⑥ Make sure the device is power off before testing, and disconnected with other energized equipment.

⑦ The casing must be grounded firmly.

⑧ Not allow irrelevant items stacked on and around the device panel.

⑨ When replace the fuse and accessories, please use this instrument with the same model.

⑩ The DC resistance tester quick test pay attention to the moisture and grease.

NAZT-S Three-channel Transformer DC Resistance Tester    NAZT-S三通道变压器直流电阻测试仪

产品简介

NAZT-S三通道变压器直流电阻测试仪（以下简称直阻仪）是变压器直流电阻测量的最新一代产品，是为测量大容量变压器三相绕组直流电阻而优化设计的。可对变压器的三相绕组直流电阻进行同时测试。对有载调压变压器可以不需要放电，直接调节分接开关，测量时间是传统单相测量的三分之一，可大大缩短工作时间和劳动强度。直阻仪采用大屏幕液晶显示器，中英文图形界面，清晰直观，操作非常简单。并配备面板式打印机和大容量非易失性存储器，可以方便的存储和打印测量结果。测试数据稳定，快速，重复性好，是现场测量变压器直流电阻的最佳选择。

产品别名

直流电阻速测仪、变压器直流电阻测试仪、变压器绕组直流电阻测试仪、变压器直阻速测仪、变压器直阻快速测试仪、感性负载直流电阻速测仪、感性负载直流电阻快速测试仪、感性负载直流电阻测试仪,三回路变压器直流电阻测试仪、三回路变压器测试仪

产品特性

1.对星型接法有中性点引出的绕组测试时，仪器可以采取三相同时测量的方式测试A0、B0、C0相的直流电阻，大大节省测试时间；

2.显示、打印变压器的高中低压绕组的全部测试数据，并自动计算出三相不平衡率；

3.具有完善的反电势保护功能；

4.具有自动放电和放电指示功能，减少误操作，保证设备及人员安全；

5.仪器可以永久存储测试数据500组，还可以使用优盘存储数据；

6.仪器采用5.7寸超大液晶显示，可随时打印测试结果；

7.仪器具有适用温度宽，精度高，防震，抗干扰，携带方便等特点。

主要参数

输出电流  三相测试：2*10A、2*5A、2*2A

单相测试：20A、10A、2A

测试范围   2*10A：500μΩ～500mΩ

2*5A： 1mΩ～1Ω

2*2A： 2.5mΩ～2.5Ω

20A：  250μΩ～1Ω

10A：  500μΩ～2Ω

2A：   2.5mΩ～10Ω

分 辨 率:  0.1μΩ

测量精度: ±(0.2%读数+2字)

外形尺寸: 420mm×250mm×340mm

仪器重量: 15kg

使用条件

环境温度:  -10℃～50℃

环境湿度:  ≤85%RH

工作电源:  AC220V±10%

电源频率:  50±1Hz

Product introduction

NAZT-S Three-channel Transformer DC resistance tester (hereinafter referred to as direct resistance meter) is the latest generation product of transformer DC resistance measurement, used for measuring large-capacity transformer three-phase winding DC resistance. Three-phase transformer winding DC resistance can be tested simultaneously . For loaded tap changer, it’s no need to discharge, just to regulate the tap directly. The measuring time is one-third of traditional single-phase measuring time, can reduce the working hours and labor intensity greatly Direct resistance tester using a large-screen LCD display, full English graphical interface, clear and intuitive, is very simple to operate. And equipped with a large-capacity printer panel and a nonvolatile memory, can storage and print easily. The testing data is stable, fast and reproducible, is the best choice for on-site transformer DC resistance measuring .

Also called name

DC resistance rapid tester, transformer DC resistance tester, transformer winding DC resistance tester, transformer direct resistance rapid tester, transformer direct resistance rapid tester, inductive loaded DC resistance tester, inductive loaded DC Resistance rapid tester, inductive loaded DC resistance tester, three circuit transformer DC resistance tester, three circuit transformer tester

The Characteristics of the products

1 On star connection with neutral point leads winding test, the instrument can simultaneously measure three-phase A0, B0, C0 phase DC resistance, saving test time ;

2 Display, print all the tested data of transformer high voltage winding, and automatical calculates the three-phase unbalanced ratio ;

3 With perfect counter emf protective function.

4 With automatic discharge and discharge indicator function, to reduce the misuse, ensure the equipment and personnel safety ;

5 The instrument can store 500 groups of tested data permanently, also can use USB flash drives to store data ;

6 The instrument uses 5.7 -inch large LCD, can print the test results at any time;

7 The instrument can suitable for wide range of temperature, with high precision, shock-proof and anti-jamming function, is portable and convenient .

The parameters of the products

Output Current  Three-phase Test : 2 × 10A, 2 × 5A, 2 × 2A

Single phase : 20A, 10A, 2A

Test range 2 × 10A: 500μΩ ~ 500mΩ

2 × 5A: 1mΩ ~ 1Ω

2 × 2A: 2.5mΩ ~ 2.5Ω

20A: 250μΩ ~ 1Ω

10A: 500μΩ ~ 2Ω

2A: 2.5mΩ ~ 10Ω

Resolution : 0.1μΩ

Accuracy : ± (0.2% reading +2 )

Dimensions : 420mm × 250mm × 340mm

Instrument Weight : 15kg

Conditions of Use Ambient temperature : -10 ℃ ~ 50 ℃

Humidity : ≤ 85% RH

Power supply : AC220V ± 10%

Power frequency : 50 ± 1Hz

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