heater的中文（heater的中文电子）

大家好，我是讯享网，很高兴认识大家。
 <tbody> <tr> <td id="artContent" style="max-width: 656px;"> <div style="width: 656px; margin: 0; padding: 0; height: 0;"></div> <div>热继电器是一种电动机过载保护电器，常常与接触器配合使用，全名应是热过载继电器（thermal overload relay），如图1所示为两种常用的热继电器。</div><div><img doc360img-src='http://image109.360doc.com/DownloadImg/2024/10/2413/_1_.png' data-galleryid='' data-imgfileid='' data-ratio='0.55102' data-s='300,640' data-type='png' data-w='784' data-original-style='text-align: center;font-size: var(--articleFontsize);letter-spacing: 0.034em;width: 341px;height: 232px;' data-index='1' src='http://image109.360doc.com/DownloadImg/2024/10/2413/_1_.png' _width='341px' alt='图片'></div><div><span>（a）NR4-63型</span></div><div><img doc360img-src='http://image109.360doc.com/DownloadImg/2024/10/2413/_2_.png' data-galleryid='' data-imgfileid='' data-ratio='1' data-s='300,640' data-type='png' data-w='500' data-original-style='width: 225px;height: 226px;' data-index='2' src='http://image109.360doc.com/DownloadImg/2024/10/2413/_2_.png' _width='225px' alt='图片'></div><div><span>（b）JR36-20型</span></div><p><span>图1 热继电器</span></p><p>电动机过载是指电动机带负载吃力或带不动负载的情形，此时运行电流超过额定电流，比如，电动机缺相、堵转、高温环境等。若电动机长期过载运行，会导致绕组温升超过允许值，使绝缘老化或损坏。</p><p><span>电动机烧毁维修困难，影响生产生活。热继电器允许电动机短暂过载，若持续高电流引起过热，则能通过热效应跳闸断开主电路，从而保护电动机。</span><br></p><p>应用于电动机保护的接线如图2所示。</p><div><img doc360img-src='http://image109.360doc.com/DownloadImg/2024/10/2413/_3_.jpeg' data-cropselx1='0' data-cropselx2='578' data-cropsely1='0' data-cropsely2='476' data-galleryid='' data-imgfileid='' data-ratio='0.66281' data-s='300,640' data-type='jpeg' data-w='691' data-original-style='width: 578px;height: 470px;' data-index='3' src='http://image109.360doc.com/DownloadImg/2024/10/2413/_3_.jpeg' _width='360px' alt='图片'></div><p><span>图2 热继电器用于电动机过载保护</span></p><div data-support='96编辑器' data-style-id='24136'><div data-width='100%'><div><div><div><div><p><span>1</span></p></div></div><div><div><p><span>热继电器结构和工作原理</span></p></div></div></div></div></div></div><div><span>热继电器结构如图3所示，由发热元件、双金属片、连杆、触点等组成。其工作原理是，流入发热元件（一段电阻丝）的电流产生热量，使不同膨胀系数的双金属片（如图4）发生形变（bend），当形变达到一定距离时，就推动连杆动作，常闭触点（NC）使<strong>控制电路</strong>断开，从而使接触器失电，<strong>主电路</strong>断开，实现电动机的过载保护。</span></div><div><img doc360img-src='http://image109.360doc.com/DownloadImg/2024/10/2413/_4_.jpeg' data-cropselx1='13' data-cropselx2='371' data-cropsely1='0' data-cropsely2='230' data-galleryid='' data-imgfileid='' data-ratio='0.25974' data-s='300,640' data-type='jpeg' data-w='385' data-original-style='width: 385px;height: 230px;' data-index='4' src='http://image109.360doc.com/DownloadImg/2024/10/2413/_4_.jpeg' _width='360px' alt='图片'></div><p><span>图3 热继电器结构</span></p><p><img doc360img-src='http://image109.360doc.com/DownloadImg/2024/10/2413/_5_.jpeg' data-imgfileid='' data-ratio='0.68766' data-s='300,640' data-type='jpeg' data-w='397' data-original-style='-webkit-tap-highlight-color: transparent;outline: 0px;width: 301.989px !important;visibility: visible !important;' data-index='5' src='http://image109.360doc.com/DownloadImg/2024/10/2413/_5_.jpeg' _width='301.989px' alt='图片'></p><p><span>图4&nbsp;双金属片原理</span></p><div><mp-common-videosnap data-pluginname='mpvideosnap' data-url='https://findermp.video..com/251/20304/stodownload?encfilekey=oibeqyX228riaCwo9STVsGLPj9UYCicgttvHNuu6047bn8x4lcR4cm0Y5lC2oRgNRmO1oB9OyJMDfibd1xlmnicLMAQEqApCcV6iaNJnRnJ406RE1JASE4C59LFz2Oy1B2NZoeyliaRofudT3o&amp;token=cztXnd9GyrHsxoEIaolavV4M7TwTTOxenA5eykzlkicZNbiaibTfwnlnhScFYg9PaNvh0qgaSJbB4xjDH1Tb5suMAsoqOLw6Klgd5KvA8odZJhOzv7HCoqkqnClke5xogky&amp;idx=1&amp;bizid=1023&amp;dotrans=0&amp;hy=SH&amp;m=8fd53b7b7b2f0b01b8f8f66f46e719b6' data-headimgurl='http://wxhttp://www.360doc.com/content/24/1024/13/finderhead/zFcnrdyS1r3v9bL6TjpQXria5MlDDTIb4qhvK3aHCMkU/0' data-username='v2_0b20faec8c4ea8d10c2d0cd0de93cb0be3e3a8b4e0e45ff7976@finder' data-nickname='从零学电工' data-desc='#零基础学电工#电工知识分享#安全用电#电工' data-nonceid='' data-type='video' data-mediatype='undefined' data-authiconurl='https://dldir1v6..com/weixin/checkresupdate/auth_icon_level3_2e2f94615c1e4651a25a7e0446f63135.png' data-from='new' data-width='1088' data-height='1920' data-id='export/UzFfAgtgekIEAQAAAAAAoLEKEdgE5QAAAAstQy6ubaLX4KHWvLEZgBPEtaJITGknGMCGzNPgMIsbotJhPdcLCOfBe6sS3FJ3' data-isdisabled='0' data-errortips='' data-parentwidth='0' data-maxwidth='0' data-index='0' data-flag='0' data-feedfullcoverurl='https://findermp.video..com/251/20304/stodownload?encfilekey=oibeqyX228riaCwo9STVsGLPj9UYCicgttvHNuu6047bn8x4lcR4cm0Y5lC2oRgNRmO1oB9OyJMDfibd1xlmnicLMAQEqApCcV6iaNGichc81qAAicVZ03qv9RqFxoeCtJeOEoDySWUG4Zt3Aco&amp;token=6xykWLEnztLuiaefT8QSicnlHtzqjyiaRDn5syUEAaLvOkicd1ic8nYewDpXjKlOxYkhvymun3DoLmwstYBic6JPDRWw4anlEb7O8kTJAC1FtCXY8IpGPtvq9uRUDicDVDrtqhia&amp;idx=1&amp;bizid=1023&amp;dotrans=0&amp;hy=SH&amp;m=8fd53b7b7b2f0b01b8f8f66f46e719b6' data-feedthumburl='https://findermp.video..com/251/20350/stodownload?encfilekey=oibeqyX228riaCwo9STVsGLPj9UYCicgttvggHbSBS7fibOkoe4n0icv7oF7lAmrDKggoALILJvA5Mic0JwpR3BLEhZOpOrQrqAbQeFqFicqtOaOwgeHxdXzP9DVlEadWaShH7QIqSjpzgZqicI&amp;token=6xykWLEnztLuiaefT8QSicnlHtzqjyiaRDn0g3yU4PtS6Do3J2F3ibUUWrFFsD2hpPpQ6AaYJRb94W7IK7Wm8mklnZZjPz3x0wtKqIokjnTSeKAR45wpbCwt1HiadA2JUibkN8&amp;idx=1&amp;bizid=1023&amp;dotrans=0&amp;hy=SH&amp;m=e1dc9b697ebeffa12eae3562' data-feedcoverurl='https://findermp.video..com/251/20304/stodownload?encfilekey=oibeqyX228riaCwo9STVsGLPj9UYCicgttvHNuu6047bn8x4lcR4cm0Y5lC2oRgNRmO1oB9OyJMDfibd1xlmnicLMAQEqApCcV6iaNJnRnJ406RE1JASE4C59LFz2Oy1B2NZoeyliaRofudT3o&amp;token=cztXnd9GyrHsxoEIaolavV4M7TwTTOxenA5eykzlkicZNbiaibTfwnlnhScFYg9PaNvh0qgaSJbB4xjDH1Tb5suMAsoqOLw6Klgd5KvA8odZJhOzv7HCoqkqnClke5xogky&amp;idx=1&amp;bizid=1023&amp;dotrans=0&amp;hy=SH&amp;m=8fd53b7b7b2f0b01b8f8f66f46e719b6' data-isnews='0' data-likenum='13'></mp-common-videosnap></div><div data-support='96编辑器' data-style-id='24136'><div data-width='100%'><div><div><div><div><p><span>2</span></p></div></div><div><div><p><span>案例：NR4-63型热继电器</span></p></div></div></div></div></div></div><div><span>通过淘宝网页，可知该型号热继电器的详细信息，如图5所示。</span></div><div><img doc360img-src='http://image109.360doc.com/DownloadImg/2024/10/2413/_6_81053.png' data-galleryid='' data-imgfileid='' data-ratio='0.4216' data-s='300,640' data-type='png' data-w='574' data-original-style='' data-index='6' src='http://image109.360doc.com/DownloadImg/2024/10/2413/_6_81053.png' _width='360px' alt='图片'></div><p><span>图5 NR4-63型热继电器的面板</span></p><div>（1）进线端子：接入电动机主电路。</div><div>（2）常闭触点（95,96）：接入电动机控制电路。</div><div>（3）常开触点（97,98）：接入报警指示电路。</div><div>（4）整定电流调节：根据实际情况调整，可按电动机额定电流的0.95~1.05倍计算。</div><div>（5）测试按钮：可以模拟过载，检查热继电器是否有效。</div><div>（6）手动/自动复位选择：自动复位是指检测到过载时，经过一段时间冷却，常闭触点会自动闭合，电动机可恢复电源。<span>手动复位是指热继电器跳闸后手动干预，即手动按下复位按钮才能使常闭触点恢复闭合。</span><strong><span>在复位前必须调查热继电器跳闸原因，排除故障，才能对其复位。</span></strong></div><div data-support='96编辑器' data-style-id='24136'><div data-width='100%'><div><div><div><div><p><span>3</span></p></div></div><div><div><p><span>热继电器电气符号</span></p></div></div></div></div></div></div><p>热继电器在图纸上的文字符号为FR（旧时用KH），图形符号包括两部分（如图6所示）：</p><div>（1）串联在主电路的发热元件</div><div>（2）串联在控制电路的常闭触点（95-96）和接报警装置的常开触点<span>（97-98）</span></div><div><img doc360img-src='http://image109.360doc.com/DownloadImg/2024/10/2413/_7_.png' data-cropselx1='0' data-cropselx2='476' data-cropsely1='0' data-cropsely2='172' data-galleryid='' data-imgfileid='' data-ratio='0.' data-s='300,640' data-type='png' data-w='473' data-original-style='text-align: center;font-size: var(--articleFontsize);letter-spacing: 0.034em;width: 476px;height: 172px;' data-index='7' src='http://image109.360doc.com/DownloadImg/2024/10/2413/_7_.png' _width='360px' alt='图片'></div><p><span>图6 热继电器电气符号</span></p><div data-support='96编辑器' data-style-id='24136'><div data-width='100%'><div><div><div><div><p><span>4</span></p></div></div><div><div><p><span>热继电器应用电气原理图</span></p></div></div></div></div></div></div><div>将图2实物接线图用电气原理图表示如图7所示。</div><div><img doc360img-src='http://image109.360doc.com/DownloadImg/2024/10/2413/_8_.jpeg' data-cropselx1='0' data-cropselx2='578' data-cropsely1='0' data-cropsely2='664' data-galleryid='' data-imgfileid='' data-ratio='1.65218' data-s='300,640' data-type='jpeg' data-w='690' data-original-style='text-align: center;font-size: var(--articleFontsize);letter-spacing: 0.034em;width: 578px;height: 664px;' data-index='8' src='http://image109.360doc.com/DownloadImg/2024/10/2413/_8_.jpeg' _width='360px' alt='图片'></div><p><span>图7 热继电器应用电气原理图</span></p><p><span>左侧为主回路，右侧为控制回路。图中各部分说明如下：</span></p><div><span><strong><span>QF</span></strong><span>：漏保断路器，用于主回路短路及漏电保护</span></span></div><div><span><strong><span>KM</span></strong><span>：接触器，<span>用于启动或停止电动机（A1-A2为线圈标号，13-14为辅助触点标号）</span></span></span></div><div><span><strong><span>FR</span></strong><span>：热继电器，用于电动机过载保护（95-96常闭触点接入控制回路）</span></span></div><div><span><strong><span>FU</span></strong><span>：熔断器，用于控制回路短路保护（控制回路电源可采用交流或者直流）</span></span></div><div><span><strong><span>SB1</span></strong><span>：停止按钮，用于停止电动机运行（采用常闭触点）</span></span></div><div><span><strong><span>SB2</span></strong><span>：启动按钮，用于启动电动机运行（采用常开触点）</span></span></div><div label='powered by 135editor.com'><div data-id='86323'><div><div><img doc360img-src='http://image109.360doc.com/DownloadImg/2024/10/2413/_9_.png' data-imgfileid='' data-ratio='1.01' data-w='100' data-original-style='-webkit-tap-highlight-color: transparent;margin-bottom: -1.4em;outline: 0px;vertical-align: middle;display: inline;width: 37.3722px !important;visibility: visible !important;' data-index='9' src='http://image109.360doc.com/DownloadImg/2024/10/2413/_9_.png' _width='37.3722px' alt='图片'></div><div data-width='90%'><div><p><span>问：断路器也有过载保护功能，是否可以省略热继电器？</span></p><p><span>答：热继电器依靠发热元件检测过载，控制接触器切断电动机主回路，断路器虽然也有热脱扣器，但热继电器专器专用，对于电动机频繁启动、短暂过载、又不致于引起无意义的跳闸，保护动作更可靠。</span><span>在电动机回路中，选择热继电器与具有短路保护的断路器配套使用，效果**。</span></p><p><span>问：热继电器与小型中间继电器有什么区别？</span></p><p><span>答：小型中间继电器（<span>miniature relay</span>）有电磁线圈通过电磁力开闭触点，起到继电控制作用。而热继电器利用热效应产生的弯曲力发出开关信号，热继电器更象一个热传感器或温度传感器。</span></p><p><span><img doc360img-src='http://image109.360doc.com/DownloadImg/2024/10/2413/_10_.jpeg' data-imgfileid='' data-ratio='1.44' data-type='jpeg' data-w='500' data-original-style='width: 130px;height: 187px;' data-index='10' src='http://image109.360doc.com/DownloadImg/2024/10/2413/_10_.jpeg' _width='130px' alt='图片'></span></p><p><span>问：热继电器与接触器是什么关系<span>？</span></span></p><p><span>答：热继电器必须和接触器配合使用来保护电动机。用热继电器的常闭触点控制接触器的通断，从而接通主电源。因此有插针式热继电器。</span></p><p><img doc360img-src='http://image109.360doc.com/DownloadImg/2024/10/2413/_11_81121.png' data-galleryid='' data-imgfileid='' data-ratio='0.79245' data-s='300,640' data-type='png' data-w='318' data-original-style='width: 193px;height: 144px;' data-index='11' src='http://pubimage.360doc.com/wz/default.gif' _width='193px' alt='图片'></p></div></div></div></div></div><div data-id='7617' data-tools='新媒体排版' data-style-type='1'><div data-id='7174' data-tools='新媒体排版' data-style-type='1'><span><strong><br></strong></span></div></div><div><span>热继电器作为保护电器，它不作频繁接通/断开之用。即使主电路断开，其进线出线之间依然是接通的。虽然用了继电器的名称，但与中间继电器、接触器的作用不同，热继电器不存在电磁线圈的得电与失电。</span></div><p>随着技术的进步，现在还有一种常见的电动机过载保护装置，称为电动机综合保护器，内置芯片工作。读者可在淘宝网页查阅具体信息。</p><p>但热继电器易于安装和维护，过载保护可靠，性价比高，值得选用。<span>电动机往往需要全天候、在高温恶劣环境下工作，有了热继电器的过载保护，秩序井然。</span></p><p>（文/汤彩萍）<span><br></span></p><div><div><br></div></div><p><img doc360img-src='http://image109.360doc.com/DownloadImg/2024/10/2413/_12_.gif' data-imgfileid='' data-ratio='0.' data-type='gif' data-w='22' data-original-style='-webkit-tap-highlight-color: transparent;outline: 0px;color: rgb(75, 172, 198);line-height: 24px;font-family: 微软雅黑;white-space: pre-wrap;width: 21.9886px !important;visibility: visible !important;' data-index='12' src='http://pubimage.360doc.com/wz/default.gif' _width='21.9886px' data-order='0' alt='图片'></p><div><div><div><div><br></div><div><br></div><div><br></div></div><div><div><span><img doc360img-src='http://image109.360doc.com/DownloadImg/2024/10/2413/_13_.jpeg' data-imgfileid='' data-ratio='0.21875' data-s='300,640' data-type='jpeg' data-w='640' data-original-style='-webkit-tap-highlight-color: transparent;outline: 0px;width: 640px !important;visibility: visible !important;' data-index='13' src='http://pubimage.360doc.com/wz/default.gif' _width='360px' alt='图片'><br></span><p><span>用万用表检查测量NR4-63型热继电器。列表表示正常情况与测试条件下发热元件、常开常闭触点的通断情况。</span></p></div></div><div><div><br></div><div><br></div></div></div><div><br></div></div> </td> </tr> </tbody>
讯享网
heater的中文（heater的中文电子）

相关推荐
