Partical Discharge Testing 
NACT type CT ratio polarity tester NACT全自动互感器变比极性测试仪
产品简介
根据JJG313-94《测量用电流互感器》，JJG313-93《测量用电压互感器》要求互感器交接时和更换绕组后必须进行现场变比检查试验。
常规互感器变比的检查方法是电流法，从原理上讲是一种容易理解可行的检查方法，但是随着系统容量的增加，电流互感器的一次电流越来越大，最大可达数万安培;现场加电流至数百安培已有困难，数千安培或数万安培几乎不可能，况且体积庞大，重量重达几百公斤或几吨，现场使用更为困难，如采用小电流法，由于电流互感器磁感度、线性度、阻抗、漏抗的影响会使电流互感器误差骤增，失去了变比检查的意义。
体积小、重量轻、测量范围广、便于携带，适于现场使用的电流互感器变比测试仪越来越成为互感器测试工作。NACT互感器变比极性测试仪就是南澳电气公司总结国内外互感器特性,运用目前最新研究理论及成果，结合现场使用的要求研制而成的。
产品别名
CT变比极性在线检测仪，高压互感器变比测试仪，高压CT变比测试仪，高低压CT变比测试仪，高低压互感器变比测试仪，带电测量高压CT变比测试仪，高压CT变比测试仪
产品参数
工作电源输入：AC220V/50Hz
变比测量范围：
5A/5A------25000A/5A；
5A/1A-------5000A/1A。
电磁式电压互感器全系列。
测量精度：0.2%
体积：280mm×220mm×120mm
重量：2kg
NACT Automatic type CT ratio polarity tester
Product introduction
Differ from the traditional structure, specially for measuring high and low voltage secondary circuit of a current, variable ratio, relative to other, polarity, leakage current and well-designed. Using the latest CT technology and mask figures integration technology. By a dedicated high voltage detector, low current clamp, the host, high voltage insulation rod, monitoring software and other components, and its wireless transmission of test data can penetrate obstacles to multi-storey buildings, linear transmission distance up to 30 meters. If you do not use insulated rod, but also can be used as high-precision voltage clamp meter, leakage current meter can accurately measure 0.00mA ~ 1000A current or leakage current.
Also called name
CT ratio polarity line detector, high voltage transformer ratio tester, high voltage CT ratio tester, high voltage CT ratio tester, high voltage transformer ratio tester, live measurement of high voltage CT ratio tester, high CT ratio tester
The Characteristics of the products
1. we are the first company who take voltage measuring method in use, small in volume, light in weight, portable, meet the needs for field tests.
2. voltage wave form generated by single chip process, clean and pure, without the interference by power network.
3.the internal of the device uses constant voltage source, with stable reading.
4. applies to current transformers of tens ampere to tens thousands ampere and all electromagnetic PT.
5. can directly display the transformer ratio.
6. electron method to test the transformer polarity, simple and straightforward .
The parameters of the products
1. Power supply: AC220V/50Hz
2. Ratio measurement range:5A/5A------25000A/5A；5A/1A-------5000A/1A
3. With CT, electromagnetic PT whole series
4. Accuracy :0.2%
5. Dimension:280mm*220mm*120mm
6. Weight :2Kg
Function | High and low voltage secondary circuit of a current ratio, polarity , phase types, leakage current online monitoring ; transformer sides the current size , ratio -line monitoring |
Power source | DC6V alkaline batteries (1.5V AAA × 4) approximately 30 hours of continuous work |
Test methods | Clamp CT |
Transmission | Wireless transmission, transmission distance of about 30m straight line |
Display Mode | LCD: 128dots × 64dots; blue backlight function , suitable for dark places |
LCD Size | Display field : 44mm × 27mm |
Meter size | Host : width height thickness 75mm × 170mm × 30mm Voltage tester : width height thickness 76mm × 255mm × 31mm Low Current Clamp : Width height thickness 63mm × 160mm × 23mm |
Jaw size | Voltage tester : φ48mm Low current clamp : φ30mm |
Sampling rate | 2 times / sec |
Measuring range | High voltage detector : 0.0mA ~ 1000A Low Current Clamp : 0.00mA ~ 10A |
Resolution | High voltage detector : 0.1mA; Low Current Clamp : 0.01mA |
Gearshift | Automatic gearshift |
Primary circuit test accuracy 23 ℃ ± 3 ℃, below 80% RH | 0.0mA～10.0A: ±1%±5dgt |
10.0A～49.9A: ±2%±5dgt | |
50.0A～199.9A: ±3%±5dgt | |
200A～600A: ±4%±5dgt | |
601A～1000A: ±5%±5dgt | |
Secondary circuit test accuracy 23 ℃ ± 3 ℃, below 80% RH | 0.00～10A: ±1%±5dgt |
Ratio | Three kinds of variables than the display : ( a secondary circuit measured current ratio ; commuted to the secondary circuit 5A ratio ; to the 10kV-YY transformer 10kV/380V commuted ratio ) , the maximum ratio of 1:1 ten million ( 1.0K7) |
Data storage | 3000 groups , press the HOLD key to keep the data and numbered storage automatically (not affact by replace the battery or a sudden brownout) |
Line Voltage | The following 60kV line test ( must be insulated with 5 lever operation ) |
Data Hold | Press HOLD to hold the data , HOLD symbol is displayed , press the HOLD button to cancel maintained |
Data checking | Press HOLD + POWER key to enter the Data Recall Mode |
Overflow Show | Overrange overflow function : "OL A" symbol is displayed |
No signal indication | When the host transmits a signal is not received prompt " No Signal" |
Automatic shutdown | About 15 minutes after the start , the meter will automatically shut down |
Battery voltage | When the battery voltage is lower than 4.8V, low battery symbol appears , replace the battery alert |
Instrumentation quality | Host : 240g ( with battery ) High voltage detector : 335g ( with battery ) Low current clamp : 170g Instrument total mass : 12Kg ( including insulation rod and battery ) |
Outside interference | No particularly strong electromagnetic fields ; without 433MHz, 315 MHz co-channel interference |
Working temperature and humidity | -25℃～45℃；below 80%Rh |
Storage Temperature and Humidity | -10℃～60℃； below 70%Rh |
Insulating rod dimensions | φ32mm, 1m / section ( 5 standard ) , can be extended . |
Low current clamp wire length | Standard 2 m ( distance can be lengthened according to the site ) |
Dielectric Strength | High voltage detector : AC100kV/rms ( Section 5 insulating rod with high current clamp clamp core ) Host and low-voltage current clamp : AC1000V/rms |
Structure | Drip Ⅱ type ( high voltage detector ) |
Safety Rules | IEC1010-1, IEC1010-2-032, Pollution degree 2, CAT Ⅲ (600V), IEC61326 (EMC standard ) |
Accessories | Clamp : 1 ; Receiver: 1 ; current clamp : 1 ; Disc : 1 ; RS232 communication cable : 1 ; meter box : 1 ; insulating rod ( 1 m ) : 5 ; batteries (LR03) : 8 |
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