、儀器概述

KT-502地(di)網電阻(zu)測量儀適用于測試各類(lei)接地(di)裝置的(de)工頻(pin)(pin)接地(di)阻(zu)抗、接觸(chu)電(dian)(dian)壓(ya)、跨步電(dian)(dian)壓(ya)、等工頻(pin)(pin)特(te)性參數以及土(tu)壤電(dian)(dian)阻(zu)率。目前在(zai)電(dian)(dian)力系統中，大(da)型(xing)地(di)網(wang)的(de)接地(di)電(dian)(dian)阻(zu)的(de)測試目前主要采用工頻(pin)(pin)大(da)電(dian)(dian)流(liu)三極法測量(liang)。為了防止電(dian)(dian)網(wang)運行時產生(sheng)的(de)工頻(pin)(pin)干擾，提高測量(liang)結果的(de)準確性，絕緣預防性試驗規(gui)程規(gui)定：工頻(pin)(pin)大(da)電(dian)(dian)流(liu)法的(de)試驗電(dian)(dian)流(liu)不得小于30安(an)培(pei)。由此(ci)，就(jiu)出現了試(shi)驗設備笨重(zhong)，試(shi)驗過(guo)程復雜，試(shi)驗人(ren)員(yuan)工作強(qiang)度大，試(shi)驗時間長等諸(zhu)多問題(ti)。

KT-502地網電阻(zu)測量儀，可測(ce)變電站地網（4Ω）、水火電(dian)廠、微(wei)波站（10Ω）、避雷針（10Ω）多用(yong)(yong)機型，采(cai)用(yong)(yong)了新型變頻(pin)交流電(dian)源，并采(cai)用(yong)(yong)了微機處(chu)理控制和(he)信(xin)號處(chu)理等措施(shi)，很好(hao)的解決(jue)了測(ce)試(shi)過程中的抗干擾問題，簡(jian)化了試(shi)驗(yan)(yan)操作過程，提高了測(ce)試(shi)結(jie)果(guo)的精度和(he)準確性，大大降低(di)了試(shi)驗(yan)(yan)人(ren)員的勞動強度和(he)試(shi)驗(yan)(yan)成本。

KT-502適用(yong)于(yu)測(ce)試各(ge)類接地裝置(zhi)的工(gong)頻(pin)接地阻抗、接觸電(dian)壓、跨步(bu)電(dian)壓、等工(gong)頻(pin)特性參數(shu)以及土壤電(dian)阻率。本儀器采用(yong)異頻(pin)抗干擾技(ji)術，能在(zai)強(qiang)干擾環(huan)境(jing)下(xia)準確測(ce)得(de)工(gong)頻(pin)50Hz下的數據。測(ce)試電流zui大，不(bu)會引起測(ce)試時(shi)接地裝(zhuang)置(zhi)的電(dian)位(wei)過高，同時(shi)它還具有*的抗干(gan)擾能力，故可(ke)以(yi)在不(bu)停電(dian)的情況下進行測(ce)量。

二、性能特(te)點

1、測(ce)量的工頻(pin)等效性好。測(ce)試電流(liu)波形為(wei)正弦波，頻(pin)率僅與工頻(pin)相差為(wei)5Hz，使用45Hz 和(he)55Hz 兩種頻率進行測量。

2、抗(kang)(kang)干擾能(neng)力(li)強。本儀器采用異頻法測量，配合現(xian)代軟硬件濾波技術(shu)，使得儀器具有很高(gao)的(de)抗(kang)(kang)干擾性能(neng)，測試(shi)數據穩定可靠(kao)。

3、精(jing)度(du)高。基本誤差(cha)僅0.005Ω，可用來(lai)測(ce)量接(jie)地(di)阻抗很(hen)小(xiao)的大型(xing)地(di)網。

4、功能強大(da)。可測(ce)量電(dian)流樁(zhuang)，電(dian)壓樁(zhuang)，接(jie)地電(dian)阻，跨步電(dian)壓，接(jie)觸電(dian)壓。

5、操作簡單。全中文菜單式操作，直接顯示出(chu)測量結果(guo)。

6、布線勞(lao)動量小，無需大電(dian)流線。

三、技術指標

1、阻抗測量(liang)范圍(wei)：0Ω～200Ω

2、分辨(bian)率：0.001Ω

3、測量誤差(cha)：±（讀數×2％+0.005Ω）

4、抗工(gong)頻50Hz 電壓(ya)干擾能力：10V

5、測試(shi)電流波形(xing)：正弦波

6、測試電流頻率：45Hz、55Hz 雙(shuang)頻

7、zui大(da)輸(shu)出電流：

8、zui大(da)輸出電壓：400V

9、測量線(xian)要求： 電流線(xian)銅芯截(jie)面積(ji)≥1mm2

電壓(ya)線銅芯截(jie)面(mian)積≥1.0mm2

10、供電電源：AC220V±10％，50Hz

11、外形尺(chi)寸：440×350×210

12、儀器重量：10kg

揚州科(ke)拓電氣科(ke)技有限公(gong)司主要產品(pin)：

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