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class="inside_rnewtime">點(diǎn)擊次數：158 更新時(shí)間：2024-04-28</div> <div id="lx5p5fx" class="inside_rnewcon"><p><strong><span style=";font-family:等線(xiàn);font-size:14px">高精度分流器1000A/75MV 0.05級定做</span></strong></p><p><strong><span style=";font-family:等線(xiàn);font-size:14px">一、總述：</span></strong><strong></strong></p><p style="margin-left:28px"><span style=";font-family:等線(xiàn);font-size:14px">適用范圍：本規格書(shū)適用于分流器。</span></p><p style="margin-left:28px"><span style=";font-family:等線(xiàn);font-size:14px"><span style="font-family:等線(xiàn)">使用與溫度范圍：</span><span style="font-family:等線(xiàn)">-</span></span><span style=";font-family:等線(xiàn);font-size:14px">40</span><span style=";font-family:等線(xiàn);font-size:14px">℃～+</span><span style=";font-family:等線(xiàn);font-size:14px">80</span><span style=";font-family:等線(xiàn);font-size:14px">℃</span></p><p style="margin-left:28px"><span style=";font-family:等線(xiàn);font-size:14px"><span style="font-family:等線(xiàn)">試驗環(huán)境：標準試驗環(huán)境，周?chē)鷾囟葹?/span><span style="font-family:等線(xiàn)">20±2℃，相對濕度為60～70%的狀態(tài)下進(jìn)行，但如果不影響判定或引起疑問(wèn)時(shí)，可在常溫（10～35℃）、常濕（45～</span></span><span style=";font-family:等線(xiàn);font-size:14px">80</span><span style=";font-family:等線(xiàn);font-size:14px">%）的條件進(jìn)行。</span></p><p style="text-indent:0"><strong><span style=";font-family:等線(xiàn);font-size:14px">二、分流器適用標準：</span></strong><strong></strong></p><p style="margin-left:28px"><span style=";font-family:等線(xiàn);font-size:14px">1、產(chǎn)品標準：</span></p><p style="margin-left:28px;text-indent:19px"><span style=";font-family:等線(xiàn);font-size:14px"><span style="font-family:等線(xiàn)">中華人民共和國國家標準：</span><span style="font-family:等線(xiàn)">GB/T7676-1998《直接作用模擬指示電測量?jì)x表及其附件》</span></span><span style=";font-family:等線(xiàn);font-size:14px">。</span></p><p style="margin-left:28px;text-indent:19px"><span style=";font-family:等線(xiàn);font-size:14px"><span style="font-family:等線(xiàn)">中華人民共和國專(zhuān)業(yè)標準：</span> <span style="font-family:等線(xiàn)">JB/T9288-1999 《外附分流器》</span></span></p><p style="margin-left:28px"><span style=";font-family:等線(xiàn);font-size:14px">2. 安規標準：</span></p><p style="margin-left:28px;text-indent:19px"><span style=";font-family:等線(xiàn);font-size:14px">IEC 61010-1:1990《測量、控制和實(shí)驗室用的電氣設備的安全要求第一部份：通用要求》</span></p><p><strong><span style=";font-family:等線(xiàn);font-size:14px">三、外觀(guān)及構造：</span></strong><strong></strong></p><p style="text-indent:28px"><span style=";font-family:等線(xiàn);font-size:14px">1、外觀(guān)：</span></p><p style="text-indent:28px"><span style=";font-family:等線(xiàn);font-size:14px"> <span style="font-family:等線(xiàn)">分流器本體表面光潔、無(wú)臟污現象，焊縫飽滿(mǎn)光滑無(wú)明顯凹陷。</span></span></p><p style="text-indent:28px"><span style=";font-family:等線(xiàn);font-size:14px">2、構造：</span></p><p style="text-indent:28px"><span style=";font-family:等線(xiàn);font-size:14px"> <span style="font-family:等線(xiàn)">連接頭：紫銅</span></span></p><p style="text-indent:28px"><span style=";font-family:等線(xiàn);font-size:14px"> <span style="font-family:等線(xiàn)">電阻器：</span><span style="font-family:等線(xiàn)">6J13</span></span></p><p style="text-indent:28px"><span style=";font-family:等線(xiàn);font-size:14px"> </span><span style=";font-family:等線(xiàn);font-size:14px">阻燃殼體、散熱片</span></p><p style="text-indent:28px"><span style=";font-family:等線(xiàn);font-size:14px">3</span><span style=";font-family:等線(xiàn);font-size:14px">、表面處理：</span></p><p style="text-indent:28px"><span style=";font-family:等線(xiàn);font-size:14px"> <span style="font-family:等線(xiàn)">端片表面、電阻器表面</span><span style="font-family:等線(xiàn)">: 酸洗鈍化、噴砂研磨處理</span></span><span style=";font-family:等線(xiàn);font-size:14px">；</span></p><p style="text-indent:28px"><span style=";font-family:等線(xiàn);font-size:14px">4、標志：</span></p><p style="text-indent:56px"><span style=";font-family:等線(xiàn);font-size:14px">A．產(chǎn)品型號</span></p><p style="text-indent:56px"><span style=";font-family:等線(xiàn);font-size:14px">B．生產(chǎn)廠(chǎng)家（商標）</span></p><p style="text-indent:56px"><span style=";font-family:等線(xiàn);font-size:14px">C．準確定等級</span></p><p style="text-indent:56px"><span style=";font-family:等線(xiàn);font-size:14px">D．額定電流</span></p><p style="text-indent:56px"><span style=";font-family:等線(xiàn);font-size:14px">E．額定二次電壓</span></p><p style="text-indent:56px"><span style=";font-family:等線(xiàn);font-size:14px">F．生產(chǎn)日期</span></p><p><strong><span style=";font-family:等線(xiàn);font-size:14px">四、分流器</span></strong><strong><span style=";font-family:等線(xiàn);font-size:14px">參數：</span></strong><strong></strong></p><div id="xtvnf7v" class="tabledivclass" style="width: 99%; float: left;"><table border="1" cellspacing="0" align="left" width="661" style="max-width: 748px;"><tbody><tr style="height:27px" class="firstRow"><td width="132" valign="center" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0) windowtext windowtext rgb(0, 0, 0);"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">型號規格</span></p></td><td width="132" valign="center" style="padding: 0px 7px; border-left: none; border-right: 1px solid windowtext; border-top: 1px solid rgb(0, 0, 0); border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">標稱(chēng)值</span></p></td><td width="142" valign="center" style="padding: 0px 7px; border-left: none; border-right: 1px solid windowtext; border-top: 1px solid rgb(0, 0, 0); border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">誤差值</span></p></td><td width="66" valign="center" style="padding: 0px 7px; border-left: none; border-right: 1px solid windowtext; border-top: 1px solid rgb(0, 0, 0); border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">等級</span></p></td><td width="85" valign="center" style="padding: 0px 7px; border-left: none; border-right: 1px solid windowtext; border-top: 1px solid rgb(0, 0, 0); border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">額定電流</span></p></td><td width="104" valign="center" style="padding: 0px 7px; border-left: none; border-right: 1px solid rgb(0, 0, 0); border-top: 1px solid rgb(0, 0, 0); border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">額定二次電壓</span></p></td></tr><tr style="height:42px"><td width="132" valign="center" style="padding: 0px 7px; border-left: 1px solid rgb(0, 0, 0); border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid rgb(0, 0, 0);"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">FL-28</span><span style="font-family:等線(xiàn);font-size:14px"> 1000</span><span style="font-family:等線(xiàn);font-size:14px">A/</span><span style="font-family:等線(xiàn);font-size:14px">75</span><span style="font-family:等線(xiàn);font-size:14px">mV</span></p></td><td width="132" valign="center" style="padding: 0px 7px; border-left: none; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid rgb(0, 0, 0);"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">0. 75</span><span style="font-family:等線(xiàn);font-size:14px">×10</span><sup><span style="font-family:等線(xiàn);font-size:14px;vertical-align:super"><span style="font-family:等線(xiàn)">-</span></span></sup><sup><span style="font-family:等線(xiàn);font-size:14px;vertical-align:super">4</span></sup><span style="font-family:等線(xiàn);font-size:14px">Ω</span></p></td><td width="142" valign="center" style="padding: 0px 7px; border-left: none; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid rgb(0, 0, 0);"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">±</span><span style="font-family:等線(xiàn);font-size:14px">0. 375</span><span style="font-family:等線(xiàn);font-size:14px">×10</span><sup><span style="font-family:等線(xiàn);font-size:14px;vertical-align:super"><span style="font-family:等線(xiàn)">-</span></span></sup><sup><span style="font-family:等線(xiàn);font-size:14px;vertical-align:super">7</span></sup><span style="font-family:等線(xiàn);font-size:14px">Ω</span></p></td><td width="66" valign="center" style="padding: 0px 7px; border-left: none; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid rgb(0, 0, 0);"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">0.</span><span style="font-family:等線(xiàn);font-size:14px">05</span><span style="font-family:等線(xiàn);font-size:14px">級</span></p></td><td width="85" valign="center" style="padding: 0px 7px; border-left: none; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid rgb(0, 0, 0);"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">1000</span><span style="font-family:等線(xiàn);font-size:14px">A</span></p></td><td width="104" valign="center" style="padding: 0px 7px; border-left: none; border-right: 1px solid rgb(0, 0, 0); border-top: none; border-bottom: 1px solid rgb(0, 0, 0);"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">75</span><span style="font-family:等線(xiàn);font-size:14px">mV</span></p></td></tr></tbody></table></div><p><strong><span style=";font-family:等線(xiàn);font-size:14px"><span style="font-family:等線(xiàn)">五、外形尺寸（單位：</span><span style="font-family:等線(xiàn)">mm）</span></span></strong><strong></strong></p><p><strong><span style=";font-family:等線(xiàn);font-size:14px"> </span></strong></p><p><strong><span style=";font-family:等線(xiàn);font-size:14px"> </span></strong></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img48.chem17.com/9/20240428/638498927454322258532.png" title="7[AB(I_LX3MGWIFB0J(Z1{5.png" alt="7[AB(I_LX3MGWIFB0J(Z1{5.png"/></p><p style="text-align:center"><span style=";font-family:等線(xiàn);font-size:14px"> </span><br/></p><p><strong><span style=";font-family:等線(xiàn);font-size:14px"> </span></strong></p><p><strong><span style=";font-family:等線(xiàn);font-size:14px"> </span></strong><strong><span style="font-family: 等線(xiàn);">六、性能特性：</span></strong></p><p><strong></strong></p><div id="n7dfzvt" class="tabledivclass" style="width: 99%; float: left;"><table border="1" cellspacing="0" align="left" width="576" style="max-width: 748px;"><tbody><tr class="firstRow"><td width="208" valign="center" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">試驗項目</span></p></td><td width="369" valign="center" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">性能要求</span></p></td></tr><tr><td width="208" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">準確度等級</span></p></td><td width="369" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">0.05</span><span style="font-family:等線(xiàn);font-size:14px">級</span></p></td></tr><tr><td width="208" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">使用環(huán)境條件</span></p></td><td width="369" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">-</span><span style="font-family:等線(xiàn);font-size:14px">40</span><span style="font-family:等線(xiàn);font-size:14px">℃～+</span><span style="font-family:等線(xiàn);font-size:14px">60</span><span style="font-family:等線(xiàn);font-size:14px">℃ 相對濕度≤95%（在35℃時(shí)）</span></p></td></tr><tr><td width="208" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">過(guò)載性能</span></p></td><td width="369" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px"><span style="font-family:等線(xiàn)">額定電流的</span><span style="font-family:等線(xiàn)">120%，2小時(shí)</span></span></p></td></tr><tr><td width="208" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">電壓降</span></p></td><td width="369" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">75mV</span></p></td></tr><tr><td width="208" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">表面溫升</span></p></td><td width="369" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">不超過(guò)</span><span style="font-family:等線(xiàn);font-size:14px">80</span><span style="font-family:等線(xiàn);font-size:14px">℃（超過(guò)需加裝散熱裝置</span><span style="font-family:等線(xiàn);font-size:14px">）</span></p></td></tr><tr><td width="208" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">電阻溫度系數</span></p></td><td width="369" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:等線(xiàn);font-size:14px">0</span><span style="font-family:等線(xiàn);font-size:14px"><span style="font-family:等線(xiàn)">～</span><span style="font-family:等線(xiàn)">+</span></span><span style="font-family:等線(xiàn);font-size:14px">20</span><span style="font-family:等線(xiàn);font-size:14px">PPM/℃</span></p></td></tr></tbody></table></div><p style="text-indent:28px"><span style=";font-family:等線(xiàn);font-size:14px">1</span><span style=";font-family:等線(xiàn);font-size:14px">、電氣性能及其測試規范：</span></p><p style="text-indent:56px"><span style=";font-family:等線(xiàn);font-size:14px">a. </span><span style=";font-family:等線(xiàn);font-size:14px">阻值：分流器在上述環(huán)境下測量的阻值與其標稱(chēng)阻值比較，誤差必須在允許誤差范圍值內。</span></p><p style="text-indent:56px"><span style=";font-family:等線(xiàn);font-size:14px">b. 額定電壓：額定電壓是指分流器的額定直流連續工作電壓，可由下式計算得到：</span></p><p style="text-indent:28px"><span style=";font-family:等線(xiàn);font-size:14px"> <span style="font-family:等線(xiàn)">U=IxR</span></span><span style=";font-family:等線(xiàn);font-size:14px"> </span><span style=";font-family:等線(xiàn);font-size:14px">I：額定電流（A） R：標稱(chēng)電阻值（Ω） U：額定電壓（V）</span></p><p style="margin-left:70px"><span style=";font-family:等線(xiàn);font-size:14px">c. 額定功率：通常所說(shuō)的分流器額定功率，是指在周?chē)鷾囟鹊陀?5</span><span style=";font-family:等線(xiàn);font-size:14px">℃時(shí)，分流器所能連續使用最大功率值，當周?chē)鷾囟雀哂?5℃時(shí)，額定功率由下圖的降功曲線(xiàn)來(lái)決定。</span></p><p style="margin-left:66px"><span style=";font-family:等線(xiàn);font-size:14px"> </span><span style=";font-family:等線(xiàn);font-size:14px"> </span></p><p style="margin-left:66px"><span style=";font-family:等線(xiàn);font-size:14px"> </span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img43.chem17.com/9/20240428/638498928450859848806.png" title="Q8@{Z@3MM[S6S5N[RY6_WG5.png" alt="Q8@{Z@3MM[S6S5N[RY6_WG5.png"/></p><p style="margin-left:66px"><span style=";font-family:等線(xiàn);font-size:14px"></span><br/></p><p style="margin-left:70px"><span style=";font-family:等線(xiàn);font-size:14px">d. </span><span style=";font-family:等線(xiàn);font-size:14px">機械沖擊：在室溫，按照</span><span style=";font-family:等線(xiàn);font-size:14px">GB/T31467.3進(jìn)行機械沖擊測試</span><span style=";font-family:等線(xiàn);font-size:14px">，測試驗前與試驗后的阻值，阻值改變量符合等級指數，分流器外觀(guān)無(wú)損傷。</span></p><p style="margin-left:70px"><span style=";font-family:等線(xiàn);font-size:14px">e. 隨機振動(dòng)：在室溫，按照</span><span style=";font-family:等線(xiàn);font-size:14px">GB/T31467.3進(jìn)行機械沖擊測試</span><span style=";font-family:等線(xiàn);font-size:14px">，測試驗前與試驗后的阻值，阻值改變量符合等級指數，分流器外觀(guān)無(wú)損傷。</span></p><p style="margin-left:70px"><span style=";font-family:等線(xiàn);font-size:14px">f. 高溫存儲：在高溫恒溫箱中</span><span style=";font-family:等線(xiàn);font-size:14px"><span style="font-family:等線(xiàn)">測試</span>1000h、80℃、不帶載</span><span style=";font-family:等線(xiàn);font-size:14px">，</span><span style=";font-family:等線(xiàn);font-size:14px"><span style="font-family:等線(xiàn)">每隔</span>100h測試一次電阻Ri，共測試11次</span><span style=";font-family:等線(xiàn);font-size:14px">，阻值改變量符合等級指數。</span></p><p style="margin-left:70px"><span style=";font-family:等線(xiàn);font-size:14px">g.</span><span style=";font-family:等線(xiàn);font-size:14px"> </span><span style=";font-family:等線(xiàn);font-size:14px">低溫存儲：測試</span><span style=";font-family:等線(xiàn);font-size:14px">250h、-40℃、不帶載</span><span style=";font-family:等線(xiàn);font-size:14px">，</span><span style=";font-family:等線(xiàn);font-size:14px"><span style="font-family:等線(xiàn)">在試驗箱內，每隔</span>50h測試一次電阻Ri，共測試6次</span><span style=";font-family:等線(xiàn);font-size:14px">，阻值改變量符合等級指數，分流器外觀(guān)無(wú)損傷。</span></p><p style="margin-left:70px"><span style=";font-family:等線(xiàn);font-size:14px">h. 濕度抵抗：測試</span><span style=";font-family:等線(xiàn);font-size:14px">T=24h/循環(huán)（25℃~65℃、90%相對濕度、不帶載、Step7a/7b不需要），重復16個(gè)循環(huán)；在試驗箱內，每隔2次循環(huán)測試一次電阻Ri，共測試9次</span><span style=";font-family:等線(xiàn);font-size:14px">，阻值改變量符合等級指數。</span></p><p style="margin-left:70px"><span style=";font-family:等線(xiàn);font-size:14px">i. </span><span style=";font-family:等線(xiàn);font-size:14px"><span style="font-family:等線(xiàn)">溫度快速變化：將分流器放入規定溫度的恒溫箱中，分流器從一個(gè)恒溫箱中取出到放入另一個(gè)恒溫箱之間的轉換時(shí)間為</span><span style="font-family:等線(xiàn)">2-</span></span><span style=";font-family:等線(xiàn);font-size:14px">3</span><span style=";font-family:等線(xiàn);font-size:14px">m</span><span style=";font-family:等線(xiàn);font-size:14px">in</span><span style=";font-family:等線(xiàn);font-size:14px"><span style="font-family:等線(xiàn)">，按以下順序循環(huán)</span><span style="font-family:等線(xiàn)">5次。</span></span></p><div id="ddxdjjl" class="tabledivclass" style="width: 99%; float: left;"><table border="1" cellspacing="0" align="left" style="max-width: 748px;"><tbody><tr class="firstRow"><td width="123" valign="center" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="text-align:center"><span style="font-family: 等線(xiàn);font-size: 14px">順序</span></p></td><td width="142" valign="center" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="text-align:center"><span style="font-family: 等線(xiàn);font-size: 14px">溫度</span></p></td><td width="189" valign="center" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="text-align:center"><span style="font-family: 等線(xiàn);font-size: 14px">暴露時(shí)間</span></p></td></tr><tr><td width="123" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family: 等線(xiàn);font-size: 14px">1</span></p></td><td width="142" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family: 等線(xiàn);font-size: 14px">-</span><span style="font-family: 等線(xiàn);font-size: 14px">40</span><span style="font-family:等線(xiàn);font-size:14px">±3</span><span style="font-family:等線(xiàn);font-size:14px">℃</span></p></td><td width="189" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family: 等線(xiàn);font-size: 14px">30min</span></p></td></tr><tr><td width="123" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family: 等線(xiàn);font-size: 14px">2</span></p></td><td width="142" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family: 等線(xiàn);font-size: 14px">80</span><span style="font-family:等線(xiàn);font-size:14px">±3</span><span style="font-family:等線(xiàn);font-size:14px">℃</span></p></td><td width="189" valign="center" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family: 等線(xiàn);font-size: 14px">30min</span></p></td></tr></tbody></table></div><p style="margin-left: 70px;text-indent: 28px"><span style="font-family: 等線(xiàn);font-size: 14px"><span style="font-family:等線(xiàn)">然后將分流器放在常溫、常濕狀態(tài)恢復不小于</span><span style="font-family:等線(xiàn)">1h后，再測分流器的阻值，</span></span><span style=";font-family:等線(xiàn);font-size:14px">阻值改變量符合等級指數。</span></p><p style="margin-left: 70px"><span style=";font-family:等線(xiàn);font-size:14px">j. </span><span style=";font-family:等線(xiàn);font-size:14px">表面溫升：在室溫</span><span style=";font-family:等線(xiàn);font-size:14px"><span style="font-family:等線(xiàn)">下，分流器通額定電流，</span>4h后在分流器達到熱穩定后，測量分流器表面溫度（2個(gè)銅端、焊縫、錳銅</span><span style=";font-family:等線(xiàn);font-size:14px">棒</span><span style=";font-family:等線(xiàn);font-size:14px"><span style="font-family:等線(xiàn)">，各取</span>2個(gè)測試點(diǎn)）</span><span style=";font-family:等線(xiàn);font-size:14px">，</span><span style=";font-family:等線(xiàn);font-size:14px">取各測試點(diǎn)溫度的最大值</span><span style=";font-family:等線(xiàn);font-size:14px">，</span><span style=";font-family:等線(xiàn);font-size:14px">計算溫升</span><span style=";font-family:等線(xiàn);font-size:14px">，要求溫升不超過(guò)</span><span style=";font-family:等線(xiàn);font-size:14px">80℃</span><span style=";font-family:等線(xiàn);font-size:14px">，超過(guò)需加裝散熱裝置。</span></p><p style="margin-left: 70px"><span style=";font-family:等線(xiàn);font-size:14px">k. 熱電勢：當</span><span style=";font-family:等線(xiàn);font-size:14px">80%額定電流通過(guò)分流器時(shí)，由于熱電勢</span><span style=";font-family:等線(xiàn);font-size:14px">而</span><span style=";font-family:等線(xiàn);font-size:14px">產(chǎn)生的阻值變關(guān)，不</span><span style=";font-family:等線(xiàn);font-size:14px">得</span><span style=";font-family:等線(xiàn);font-size:14px">超過(guò)等級指數</span><span style=";font-family:等線(xiàn);font-size:14px">的</span><span style=";font-family:等線(xiàn);font-size:14px">50%；</span></p><p style="margin-left:66px"><span style=";font-family:等線(xiàn);font-size:14px"> </span><span style=";font-family:等線(xiàn);font-size:14px"> </span></p><p><br/></p></div> <div id="tflrtdp" class="inside_newsthree"> <p id="newsprev">上一篇：<b class="newsprev"><a 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