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class="pic"><img src="https://tyunfile.71360.com/UploadFile/baoyixinneng/637441725314247796/1083102.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="u8ofcjq" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/baoyixinneng/637441725314247796/1083102.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="bvxjlme" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>廣東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>成都安防系統(tǒng)電源銷售廠家,安防</p><p><span>***更新：</span>2021-01-24 13:14:32</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="azw32co" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">深圳市保益新能電氣有限公司</a></p><p><span>聯(lián)系人：</span>葉立民</p><p><span>郵箱: </span>1301978383@qq.com</p><p><span>電話: </span>18675588113</p><p><span>傳真: </span>0755_</p><p><span>網(wǎng)址: </span>http://www.boynelectric.com</p><p><span>手機(jī): </span>0755-21070344</p><p><span>地址: </span>大浪街道浪口社區(qū)華榮路496號(hào)德泰工業(yè)區(qū)1號(hào)廠房4層402</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="b3qx2h7" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="qphzr3n" class="box"><p><p style="text-indent:25px">安防監(jiān)控電源的主要危害包括以下方面：1.電源外殼采用劣質(zhì)塑料電源外殼為電源重要保護(hù)，避免外力損壞電源或發(fā)生觸電事故。部分不良商家生產(chǎn)安防監(jiān)控所用的便宜劣質(zhì)塑料外殼，在使用較長(zhǎng)時(shí)間后或放在戶外環(huán)境使用，會(huì)發(fā)生變色、外殼開裂現(xiàn)象。危害：假若電源進(jìn)水，輕則損壞電源，重則燒壞監(jiān)控?cái)z像頭，甚至發(fā)生觸電事故，傷及人身安全。選用劣質(zhì)電源，存在各種潛在的不必要風(fēng)險(xiǎn)故障。部分劣質(zhì)電源在前期使用并未出現(xiàn)明顯問(wèn)題，但在使用一段時(shí)期后容易出現(xiàn)各種故障，給監(jiān)控系統(tǒng)帶來(lái)以上所述的傷害，給選購(gòu)者帶來(lái)不必要的經(jīng)濟(jì)損失或聲譽(yù)損失。即使部分不良商家提供保修、包換服務(wù)，成都安防系統(tǒng)電源銷售廠家，但其質(zhì)保服務(wù)對(duì)象很少于電源，對(duì)于劣質(zhì)電源所造成的附帶經(jīng)濟(jì)損失（如燒壞監(jiān)控?cái)z像頭等），則不承擔(dān)任何責(zé)任。因此，建議各位選購(gòu)安防監(jiān)控電源時(shí)，一定要擦亮眼睛，成都安防系統(tǒng)電源銷售廠家，成都安防系統(tǒng)電源銷售廠家，別被低價(jià)蒙騙，一定要看清選購(gòu)的安防監(jiān)控電源的電路設(shè)計(jì)、用料質(zhì)量。幅電源電壓輸出范圍一般是在85～265VAC的標(biāo)準(zhǔn)。成都安防系統(tǒng)電源銷售廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="成都安防系統(tǒng)電源銷售廠家,安防" src="https://tyunfile.71360.com/UploadFile/baoyixinneng/637441725314247796/1083102.png"></div><p style="text-indent:25px">關(guān)于開關(guān)電源和線性電源的選擇：在實(shí)際的項(xiàng)目運(yùn)用中到底是選擇開關(guān)電源還是選擇線性電源，很多工程商朋友都無(wú)從下手，其實(shí)只要把握兩點(diǎn)就可以了：①在南方炎熱地區(qū)的項(xiàng)目，如果選擇線性電源，建議不要將線性電源和其他設(shè)備放在同一個(gè)設(shè)備箱中，因?yàn)榫€性電源損耗大，本身發(fā)熱很厲害，和其他設(shè)備在一個(gè)設(shè)備箱中，如果散熱不及時(shí)很有可能會(huì)引起其他設(shè)備的運(yùn)行不穩(wěn)定。而如果線性電源配套**的箱體的話，會(huì)帶來(lái)一些成本上的增加。②低成本的線性電源一般不帶電池充放電管理功能，很容易引起蓄電池的損壞。成都安防電源廠家電話可以先用表檢測(cè)然后在檢查安防電源線是不是有問(wèn)題，這樣的話可以減少安防電源的維修難度。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="成都安防系統(tǒng)電源銷售廠家,安防" src="https://tyunfile.71360.com/UploadFile/baoyixinneng/637441725407109475/5481036.png"></div><p style="text-indent:25px">開關(guān)電源和普通的電源有什么區(qū)別：普通的電源一般是線性電源,線性電源，是指調(diào)整管工作在線性狀態(tài)下的電源.而在開關(guān)電源中則不一樣，開關(guān)管（在開關(guān)電源中，我們一般把調(diào)整管叫做開關(guān)管）是工作在開、關(guān)兩種狀態(tài)下的：開——電阻很?。魂P(guān)——電阻很大。開關(guān)電源是一種比較新型的電源。它具有效率高，重量輕，可升、降壓，輸出功率大等優(yōu)點(diǎn)。但是由于電路工作在開關(guān)狀態(tài)，所以噪聲比較大。通過(guò)下圖，我們來(lái)簡(jiǎn)單的說(shuō)說(shuō)降壓型開關(guān)電源的工作原理。如圖所示，電路由開關(guān)K（實(shí)際電路中為三極管或者場(chǎng)效應(yīng)管），續(xù)流二極管D，儲(chǔ)能電感L，濾波電容C等構(gòu)成。當(dāng)開關(guān)閉合時(shí)，電源通過(guò)開關(guān)K、電感L給負(fù)載供電，并將部分電能儲(chǔ)存在電感L以及電容C中。</p><p style="text-indent:25px">電源分類：線性穩(wěn)壓電源1.線性穩(wěn)壓電源：線性穩(wěn)壓電源按習(xí)慣可分為變壓器型線性穩(wěn)壓電源和開關(guān)型線性穩(wěn)壓電源兩大類型，2.開關(guān)型線性穩(wěn)壓電源:有一類與變壓器型線性穩(wěn)壓電源不同的線性穩(wěn)壓電源就是開關(guān)型線性穩(wěn)壓電源，它的電路型式主要有單端反激式，單端正激式、半橋式、推挽式和全橋式。它和線性電源的根本區(qū)別在于它變壓器不工作在工頻而是工作在幾十千赫茲到幾兆赫茲。功能管不是工作在飽和及截止區(qū),而是工作在開關(guān)狀態(tài)；電源適配器因此而得名，開關(guān)電源的優(yōu)點(diǎn)是體積小，重量輕，穩(wěn)定可靠；缺點(diǎn)是相對(duì)于變壓器型線性穩(wěn)壓電源來(lái)說(shuō)紋波較大，一般≤1%VO(P-P),好的可做到。普通電源對(duì)于電源的適應(yīng)能力相對(duì)較弱，適合那些電源電壓穩(wěn)定的地方。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="成都安防系統(tǒng)電源銷售廠家,安防" src="https://tyunfile.71360.com/UploadFile/baoyixinneng/637441725347138334/6321271.png"></div><p style="text-indent:25px">UPS(不間斷電源)的工作原理：后備式UPS電源在市電正常供電時(shí)，市電通過(guò)交流旁路通道經(jīng)轉(zhuǎn)換開關(guān)直接向負(fù)載提供電源，UPS電源內(nèi)的逆變器處于停止工作狀態(tài)，這時(shí)的UPS電源實(shí)質(zhì)上相當(dāng)于一臺(tái)性能單一的市電穩(wěn)壓器。它除了對(duì)市電電壓的幅度波動(dòng)有所改善外，對(duì)電壓的頻率不穩(wěn)、波形畸變以及從電網(wǎng)侵入的*等不良影響基本上沒有任何改善。只有當(dāng)市電供電中斷或低于170伏時(shí)，蓄電池才立刻對(duì)逆變器供電，向負(fù)載提供穩(wěn)壓、穩(wěn)頻的方波交流電源。正常工作一段時(shí)間，這就需要啟用備用電源來(lái)維持這段時(shí)間監(jiān)控系統(tǒng)的正常工作。備用電源有雙路或多路供電、蓄電池組供電、發(fā)電機(jī)供電、UPS供電等等。但通常采用UPS不間斷電源作為安防監(jiān)控系統(tǒng)備用電源。由逆變器直接向設(shè)備提供交流電，同時(shí)充電器給蓄電池充電，保持蓄電池滿容量。成都安防電源廠家電話</p><p style="text-indent:25px">電通過(guò)交流旁路通道經(jīng)轉(zhuǎn)換開關(guān)直接向負(fù)載提供電源。成都安防系統(tǒng)電源銷售廠家</p><p style="text-indent:25px">監(jiān)控?cái)z像機(jī)電源功率配置的技術(shù)問(wèn)題：在監(jiān)控?cái)z像機(jī)電源的配置方面，也要注意一些細(xì)節(jié)，比如不能整個(gè)監(jiān)控系統(tǒng)共用一個(gè)電源，因?yàn)?系統(tǒng)維修的時(shí)候，經(jīng)常需要打開、關(guān)閉電源。所有的監(jiān)控?cái)z像機(jī)在打開電源瞬間同時(shí)啟動(dòng)，啟動(dòng)電流特別大，對(duì)電源的沖擊力很大，嚴(yán)重的會(huì)燒毀電源。另外一個(gè)原因就是所有的監(jiān)控?cái)z像機(jī)共用一臺(tái)電源，當(dāng)電源發(fā)生故障時(shí)，整個(gè)閉路監(jiān)控系統(tǒng)陷入癱瘓。正確的辦法可以通過(guò)一個(gè)例子來(lái)說(shuō)明，如一個(gè)商務(wù)樓有100臺(tái)固定監(jiān)控?cái)z像機(jī)，總共需要約800W的電源，如需采用PoE供電，正確的配置應(yīng)該是選擇4臺(tái)、每臺(tái)200W的PoE交換機(jī)，這種要求豐潤(rùn)達(dá)16口系列和24口系列PoE交換機(jī)都滿足。這樣，當(dāng)某一臺(tái)交換機(jī)發(fā)生故障，可以把重要出入口的攝像機(jī)接到其它好的交換機(jī)上，不至于影響整個(gè)系統(tǒng)的工作。成都安防系統(tǒng)電源銷售廠家</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2991442.html</p></div></div></div></div></div><div id="poqik7k" class="page-right twoColRt"><div id="uovx2ji" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="davnpw2" class="recomPic likePro"><a 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