產(chan)品(pin)用途描述(shu)

KTRBC變壓器繞組變形測(ce)試儀主要是(shi)通過檢(jian)測(ce)變壓器各個繞組的(de)幅頻(pin)響應特(te)性(xing)，并對檢(jian)測(ce)結果進行縱向或橫向比(bi)較，根據(ju)幅頻(pin)響應特(te)性(xing)的(de)變化程(cheng)度(du)，通過測(ce)試(shi)可以準確(que)診斷出繞組發生扭曲、鼓(gu)包、移(yi)位、傾斜、匝(za)間(jian)短路(lu)變形及相(xiang)間(jian)接觸短路(lu)等故障。判斷變壓器(qi)可能發生(sheng)的(de)繞組(zu)變形。

產品詳細說明：

因近年(nian)(nian)來變(bian)(bian)壓器短(duan)路故障(zhang)顯現上升趨勢，造成(cheng)變(bian)(bian)壓器繞(rao)組(zu)損壞的幾率(lv)增加，嚴重威(wei)脅變(bian)(bian)壓器的正常運行。我公(gong)司歷經三年(nian)(nian)研究(jiu)，開發出(chu)新代的變(bian)(bian)壓器繞(rao)組(zu)變(bian)(bian)形測(ce)試儀；采用目前(qian)上zui的方法頻率(lv)響應分析法（FRA）進行測(ce)試(shi)，是種(zhong)測(ce)量變壓器(qi)繞組頻率響應的高(gao)靈敏度測(ce)試(shi)儀器(qi)（符合國家電力行業(ye)標準(zhun)：DL/T911-2004

KTRBC變壓器繞組變形測試儀自帶個(ge)通道(dao)DDS信(xin)號(hao)輸(shu)出(chu)作為(wei)(wei)掃(sao)頻的激勵信(xin)號(hao)；信(xin)號(hao)輸(shu)出(chu)為(wei)(wei)正弦波(bo)，信(xin)號(hao)輸(shu)出(chu)幅度可以(yi)軟件調(diao)節，zui大(da)幅度±5V，信(xin)號(hao)輸(shu)出(chu)阻抗為(wei)(wei)50Ω

兩(liang)個(ge)采集(ji)通道，個(ge)采集(ji)激勵信號(hao)，個(ge)采集(ji)響應(ying)信號(hao)，用于計算傳遞函數

激(ji)勵(li)通(tong)道測(ce)量(liang)為固定量(liang)程(cheng)：±5V；響應通(tong)道有(you) 8檔量(liang)程(cheng)，在測(ce)量(liang)過程(cheng)中(zhong)自動(dong)調節(jie)量(liang)程(cheng)，zui大輸入信號為±;25V

采集通(tong)道量化(hua)精度：12位(wei)

采集通道zui大靜(jing)態誤差(cha)：0.5%

每(mei)通道zui大(da)存儲容量：64K樣點

每通(tong)道zui高(gao)采(cai)樣率：20Msps 采(cai)集通(tong)道輸入阻(zu)抗：1MΩ

掃頻測量范圍(wei)：1K－1MHz

掃描(miao)方式：采用線形(xing)分(fen)布的掃頻測(ce)量方式

掃描頻(pin)率(lv)精(jing)(jing)度：信號源輸(shu)出正弦(xian)信號的頻(pin)率(lv)精(jing)(jing)度不大于0.01%

掃頻測量頻點：1K－1MHz，測量點數(shu)1000點

符合國(guo)家電力行(xing)業標準：DL/T911-2004

變(bian)壓器繞組變(bian)形測試儀檢測原理：

在(zai)較高頻率(lv)的電(dian)(dian)壓作用下(xia)，變(bian)壓器的每個繞組均(jun)可(ke)視為個由線性(xing)(xing)電(dian)(dian)阻、電(dian)(dian)感（互感）、電(dian)(dian)容(rong)等分(fen)布參(can)數(shu)構成的無源(yuan)線性(xing)(xing)雙(shuang)口網(wang)(wang)絡(luo)，其(qi)內部特性(xing)(xing)可(ke)通過(guo)傳遞(di)函數(shu)H(jω)描述(shu)。若繞組發(fa)(fa)生(sheng)變(bian)形(xing)，繞組內部的分(fen)布電(dian)(dian)感、電(dian)(dian)容(rong)等參(can)數(shu)必然(ran)改變(bian)，導(dao)致其(qi)等效網(wang)(wang)絡(luo)傳遞(di)函數(shu)H(jω)的零點(dian)和(he)極點(dian)發(fa)(fa)生(sheng)變(bian)化(hua)，使網(wang)(wang)絡(luo)的頻率(lv)響應特性(xing)(xing)發(fa)(fa)生(sheng)變(bian)化(hua)。

　　變壓(ya)(ya)(ya)器繞組的幅頻(pin)(pin)響應(ying)(ying)特性采頻(pin)(pin)率(lv)(lv)掃描(miao)方(fang)式獲(huo)得。連續(xu)改變外施正(zheng)弦(xian)波激(ji)勵(li)源VS的頻(pin)(pin)率(lv)(lv)f(角頻(pin)(pin)率(lv)(lv)ω=2πf)，測(ce)量在不同頻(pin)(pin)率(lv)(lv)下的響應(ying)(ying)端電(dian)(dian)(dian)壓(ya)(ya)(ya)V2和(he)激(ji)勵(li)端電(dian)(dian)(dian)壓(ya)(ya)(ya)V1的信(xin)號(hao)幅值之比，獲(huo)得激(ji)勵(li)端和(he)響應(ying)(ying)端情況(kuang)下繞組的幅頻(pin)(pin)響應(ying)(ying)曲線。L、K及C分別代表(biao)繞組單位長度的分布(bu)電(dian)(dian)(dian)感、分布(bu)電(dian)(dian)(dian)容及對地分布(bu)電(dian)(dian)(dian)容，V1、V2分別為(wei)等(deng)效網絡的激(ji)勵(li)端電(dian)(dian)(dian)壓(ya)(ya)(ya)和(he)響應(ying)(ying)端電(dian)(dian)(dian)壓(ya)(ya)(ya)，VS為(wei)正(zheng)弦(xian)波激(ji)勵(li)信(xin)號(hao)源電(dian)(dian)(dian)壓(ya)(ya)(ya)，RS為(wei)信(xin)號(hao)源輸出阻抗，R為(wei)匹(pi)配(pei)電(dian)(dian)(dian)阻。

變壓(ya)器繞(rao)組變形測試儀技術參數(shu)
☆ 采集控制(zhi)采用高(gao)速、高(gao)集成(cheng)化微處理器(qi)。

☆ PC機與儀器之間USB通信(xin)接(jie)口。

☆ 硬(ying)件機芯采用DDS數字高速掃(sao)頻技術(美國)，通過測試(shi)可(ke)以準確診斷出繞組發生(sheng)扭曲、鼓包、移(yi)位、傾(qing)斜、匝間短(duan)路變形及(ji)相間接觸短(duan)路等故障。

☆ 高(gao)分辨dB值測量，雙通道16位(wei)A/D(現場試驗改變(bian)分接開關，即有明顯輸出變(bian)化)。

☆ 信(xin)號輸出幅度(du)可以軟件調節，zui大幅度(du)峰(feng)值±10V。

☆ 計算機將檢測結果(guo)生(sheng)成(cheng)電子文檔(WORD)

☆ 成(cheng)品(pin)電路板,表面(mian)有(you)(you)特(te)殊處理，具有(you)(you)抗水和有(you)(you)害氣體污染。

☆ 筆記本電(dian)(dian)腦和(he)測量(liang)儀器采用隔離電(dian)(dian)源供(gong)電(dian)(dian)，排除外界干擾(rao)。

揚州科拓電氣(qi)科技有限公司主要產品(pin)：

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