產品簡介?

在傳統的輸電線路工頻參數測試中，采用三相自耦變和大容量隔離變壓器提供測試電源，通過電力計量用的CT和PT作電信號變換，**用指針式的高精度電壓表、電流表、功率表測量各個電參數，**計算得到輸電線路工頻參數測試結果。使整套試驗設備體積大，重量大，需要吊車配合工作，十分不利于現場測量，而且由于測試電源為工頻電源，極易與耦合的工頻干擾信號混頻，帶來很大的測量誤差，需要大幅度提高信噪比，這對電源的容量和體積又進一步提高。

NA312輸電線路異頻參數測試系統能夠準確測量各種高壓輸電線線路(架空、電纜、架空電纜混合、同桿多回架設的工頻參數（正序電容、正序阻抗、零序電容、零序阻抗、互感和耦合電容等），完全滿足《110千伏及以上送變電基本建設工程啟動驗收規程》、DL/T559-94《220-500kV電網繼電保護裝置運行整定規程》、《GB50150-2006》的規定要求。

NA312輸電線路異頻參數測試系統采用一體化結構，內置變頻電源模塊，可變頻調壓輸出電源。采用數字濾波技術，避開了工頻電場對測試的干擾，從根本上解決了強電場干擾下準確測量的難題。

產品別名

輸電線路異頻參數測試系統

產品特性?

1.快速準確的完成線路的正序電容、零序電容、正序阻抗、零序阻抗等參數測量，同時還可以測量線路間的互感電抗和耦合電容測量；

2.抗干擾能力強，能在異頻信號與工頻信號比為1:10的條件下準確測量；

3.外部接線簡單，僅需一次接入被測線路的引線線就可以完成全部的線路參數測量；徹底解決現有測試手段存在的測試接線倒換繁瑣、干擾、穩定度、精度等方面的問題。

4儀器以高速單片機為內核，實現測試電源、儀表、計算模型一體化，將一卡車的設備濃縮為一臺儀器。

5.儀器采用320?x 240大屏幕點陣液晶顯示，美國進口旋轉鼠標操作，嵌入式漢字微型打印機打印結果，操作十分簡單；

6.儀器測試過程快捷，儀器自動完成測試方式控制、升降壓控制和數據測量計算，并打印測量結果，一個序參數的測量為一分鐘完成，試驗時間縮短，工作量大大減少，20分鐘內可完成傳統方法兩個小時的工作量；

7.測量精度高，儀器本身提供三組接近工頻的異頻電源（45Hz/57.5Hz?45Hz/55Hz?47.5Hz/55Hz）可供選擇，輕松分離工頻及雜波干擾，有效地實現小信號的高精度測量；

產品參數

a)儀器供電電源：三相，AC 380V±10%，10A，50Hz

b)異頻電源特性：**輸出電壓：三相，AC 200V（有效值）

c)抗干擾參數：

??????干擾電壓：接入儀器測試電源后的縱向感應電壓＜350V；

??????干擾電流：線路首末兩端短接接地時＜40A；

??????能在儀器輸出信號與干擾信號比為1:10的條件下穩定準確完成測試。

d)儀器使用環境：

???????環境溫度：-15℃—＋40℃

???????相對濕度：＜90%

Product introduction

NA302 series transmission Line Power / Line Pilot tester is designed to test transformer loss parameter, the power frequencyparametersand pilotfrequency parameters of transmission line (such as overhead line, cables and overhead lines combined with cable).The power frequency parameters includes positive sequencecapacitance,positive sequenceimpedance, zero sequence capacitance, zero sequence impedance, mutual inductance and coupling, capacitance and so on.

Also called?name

Transmission line power frequency parameters testing system; Transmission line pilot frequency parameters tester; Transmissionlinetest set; Powerline tester.

The Characteristics of the products

NA312A?Transmission Line Power Frequency Parameters Tester

Product characteristics

1. The instrument have compact design, excellent performance, powerful function, internal is used with advanced multi A / DsynchronousAC sampling anddigital signal processing technology, which successfully solves the problem of multi-channel signal synchronous measurement and calculation.

2. The instrument uses large-screen LCD, English?menu prompt, simple operation, equipped with high-speed thermal printer,anddesign of storagefunction, easy to store and print data.

3. The instrument has small volume, light weight, easy to carry, and it is convenient to use, which greatly reduces the laborintensityand improvesthe working efficiency.

NA312?Transmission Line Pilot Frequency Parameters Tester

Product characteristics

1. Fast and accurately measuring the positive sequence capacitance, zero sequence capacitance, positive sequence impedance,zerosequence impedance andother parameters of transmission lines, it also can measure the mutual inductive reactance and coupling capacitance between the lines.

2 Strong anti-interference ability, can accurately measure under the condition of the ratio between power frequency signal andpilotfrequency signalis 1:10.

3. External wiring is simple, only one time to access the lead of the line to complete all the line parameters measurements.Completelysolve theproblems of the existing test methods which cause cumbersome wiring switching procedure and the interference of stability and accuracy.

4. The instrument with high speed single chip microcomputer as the core, to achieve the integration of test power, meterandcalculation model, make atruck of equipment concentrated into a single instrument.

5. The instrument uses 320*240 large screen dot matrix LCD, operated with the rotating mouse imported from United States,embeddedmini-printer toprint the results, the operation is very simple.

6. Instrument testing process is fast, automatically complete test mode control, boost-buck control, data measurement andcalculation,and printmeasurement results, one minute to complete a parameter measurement, the test time is shortened, the workload is greatly reduced.

7. High accuracy measurement, the instrument itself provides three groups of pilot frequency power supply (45Hz/57.5Hz45Hz/55Hz47.5Hz/55Hz) which isclose to power frequency, it can easily separate frequency and clutter, effectively achieve high-precision measurement of small signals.

The parameters of the products

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

Input frequency: 50Hz/60Hz optional