常規互感器變比的檢查方法是電流法，從原理上講是一種容易理解可行的檢查方法，但是隨著系統容量的增加，電流互感器的一次電流越來越大，zui大可達數萬安培;現場加電流至數百安培已有困難，數千安培或數萬安培幾乎不可能，況且體積龐大，重量重達幾百公斤或幾噸，現場使用更為困難，如采用小電流法，由于電流互感器磁感度、線性度、阻抗、漏抗的影響會使電流互感器誤差驟增，失去了變比檢查的意義。
體積小、重量輕、測量范圍廣、便于攜帶，適于現場使用的電流互感器變比測試儀越來越成為互感器測試工作的*手段。南澳電氣NACT全自動互感器變比極性測試儀比極就是南澳電氣公司總結國內外互感器特性,運用目前研究理論及成果，結合現場使用的要求研制而成的。
南澳電氣NACT全自動互感器變比極性測試儀產品別名
CT變比極性在線檢測儀，高壓互感器變比測試儀，高壓CT變比測試儀，高低壓CT變比測試儀，高低壓互感器變比測試儀，帶電測量高壓CT變比測試儀，高壓CT變比測試儀
南澳電氣NACT全自動互感器變比極性測試儀產品特性
1、采用電壓測量法，體積小重量輕，便攜式,滿足現場工作輕便性要求。
2、電壓波形由單片機程序產生，干凈純正，免除了電網干擾。
3、內部采用恒壓源，讀數穩定。
4、適用于從幾十安培至幾萬安培的所有電流互感器。所有電磁式電壓互感器。
5、能直接顯示變比值。
6、電子法測量互感器極性，簡單直觀。
南澳電氣NACT全自動互感器變比極性測試儀產品參數
工作電源輸入：AC220V/50Hz
變比測量范圍：
5A/5A------25000A/5A；
5A/1A-------5000A/1A。
電磁式電壓互感器全系列。
測量精度：0.2%
體積：280mm×220mm×120mm
重量：2kg
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 accuray 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) approximay 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 |
