意(yi)大(da)利GEFRAN固(gu)態(tài)(tai)繼電(dian)器保(bao)養(yǎng)方法
1. 在選用(yong)小(xiao)電(dian)流規(guī)格(ge)印刷電路(lu)板使(shi)用(yong)的固(gu)態(tài)(tai)繼電(dian)器時(shí)，因(yin)引(yin)線(xian)端子(zi)為(wei)高導(dǎo)熱(re)材(cai)料制成(cheng),焊接(jie)時(shí)應(yīng)在溫度(du)小於(yu)250℃、時(shí)間小於(yu)10S的條件下(xia)進(jìn)(jin)行(xing)，如考慮周(zhou)圍(wei)溫(wen)度(du)的原因(yin)，必(bi)要(yao)時(shí)可考(kao)慮降額(e)使(shi)用(yong)，壹般將(jiang)負(fù)(fu)載電(dian)流控(kong)制(zhi)在額定(ding)值的 1/2以內(nèi)使(shi)用(yong)。
2. 各(ge)種(zhong)負(fù)(fu)載浪(lang)湧(yong)特(te)性(xing)對(duì)(dui)固(gu)態(tài)(tai)繼電(dian)器SSR的選擇
被控(kong)負(fù)(fu)載在接通(tong)瞬間會(huì)產(chǎn)生很大(da)的浪湧(yong)電(dian)流，由於(yu)熱量(liang)來(lái)不及散(san)發(fā)(fa)，很可(ke)能使(shi)SSR內(nèi)部(bu)可控(kong)矽損(sun)壞(huai),所(suo)以(yi)用(yong)戶(hu)在選用(yong)繼(ji)電(dian)器(qi)時(shí)應(yīng)對(duì)(dui)被控(kong)負(fù)(fu)載的浪湧(yong)特(te)性(xing)進(jìn)(jin)行(xing)分析,然(ran)後再(zai)選擇繼(ji)電(dian)器(qi)。使(shi)繼電(dian)器(qi)在保證(zheng)穩(wěn)態(tài)(tai)工(gong)作(zuo)前(qian)提下能夠承(cheng)受(shou)這(zhe)個(gè)浪湧(yong)電(dian)流，選擇時(shí)可參(can)考(kao)表2各(ge)種(zhong)負(fù)(fu)載時(shí)的降額(e)系(xi)數(shù)(常(chang)溫下)。
如所選用(yong)的繼電器(qi)需在工(gong)作(zuo)較(jiao)頻繁(fan)、壽命以及(ji)可靠(kao)性(xing)要(yao)求較(jiao)高的場(chǎng)(chang)合(he)工(gong)作(zuo)時(shí)，則應(yīng)在表2的基(ji)礎(chǔ)上再(zai)乘(cheng)以0.6以(yi)確保(bao)工(gong)作(zuo)可靠(kao)。
壹般在選用(yong)時(shí)遵(zun)循上述(shu)原則，在低電(dian)壓要(yao)求信(xin)號(hào)(hao)失(shi)真小(xiao)可選用(yong)采用(yong)場(chǎng)(chang)效(xiao)應(yīng)(ying)管(guan)作(zuo)輸出(chu)器(qi)件的直(zhi)流固(gu)態(tài)(tai)繼器(qi)；如對(duì)交(jiao)流阻性(xing)負(fù)(fu)載和多數(shù)感性(xing)負(fù)(fu)載，可(ke)選用(yong)過(guò)(guo)零型(xing)繼(ji)電器(qi)，這(zhe)樣可延長(zhǎng)負(fù)(fu)載和繼電器壽(shou)命(ming)，也可減(jian)小自身(shen)的射(she)頻幹?jǐn)_。如作(zuo)為(wei)相(xiang)位(wei)輸出(chu)控(kong)制(zhi)時(shí)，應(yīng)選用(yong)隨(sui)機(jī)型(xing)固(gu)態(tài)(tai)繼電(dian)器。
3. 使(shi)用(yong)環(huán)境溫度(du)的影響(xiang)
固(gu)態(tài)(tai)繼電(dian)器的負(fù)(fu)載能(neng)力(li)受(shou)環(huán)境溫度(du)和自身(shen)溫升(sheng)的影響(xiang)較(jiao)大(da)，在安(an)裝使(shi)用(yong)過(guò)(guo)程(cheng)中(zhong),應(yīng)(ying)保證(zheng)其(qi)有(you)良(liang)好(hao)的散(san)熱(re)條件，額(e)定(ding)工(gong)作(zuo)電流在10A以上(shang)的產(chǎn)品應(yīng)配散(san)熱(re)器(qi)，100A以上(shang)的產(chǎn)品應(yīng)配散(san)熱(re)器(qi)加(jia)風(fēng)(feng)扇(shan)強(qiáng)(qiang)冷(leng) 。在安(an)裝時(shí)應(yīng)註(zhu)意(yi)繼電(dian)器底部(bu)與散(san)熱(re)器(qi)的良好接(jie)觸(chu) ，並考(kao)慮塗適量(liang)導(dǎo)熱(re)矽脂(zhi)以達(dá)到*散(san)熱(re)效(xiao)果(guo)。
如繼電(dian)器長(zhǎng)期工(gong)作(zuo)在高溫狀態(tài)(tai)下(40℃~80℃)時(shí)，用(yong)戶(hu)可(ke)根(gen)據(jù)廠(chang)家(jia)提(ti)供(gong)的zui大(da)輸出(chu)電(dian)流與環(huán)境溫度(du)曲(qu)線(xian)數(shù)據(jù)，考慮降額(e)使(shi)用(yong)來(lái)(lai)保(bao)證(zheng)正(zheng)常(chang)工(gong)作(zuo)。
4. 過(guò)流、過(guò)壓保(bao)護(hù)措(cuo)施
在繼電(dian)器使(shi)用(yong)時(shí)，因(yin)過(guò)(guo)流和負(fù)(fu)載短(duan)路(lu)會(huì)造(zao)成SSR固(gu)態(tài)(tai)繼電(dian)器內(nèi)部(bu)輸出(chu)可(ke)控(kong)矽*損(sun)壞(huai) ,可(ke)考(kao)慮在控(kong)制(zhi)回(hui)路(lu)中增加(jia)快速熔(rong)斷(duan)器(qi)和空氣開(kāi)(kai)關(guān)予以(yi)保(bao)護(hù)型(xing)(選擇繼(ji)電(dian)器(qi)應(yīng)選擇產(chǎn)品輸出(chu)保(bao)護(hù),內(nèi)置壓敏電阻(zu)吸收回路(lu)和RC緩沖器,可(ke)吸(xi)收浪湧(yong)電(dian)壓和提高 dv/dt耐量(liang)）；也可在繼電(dian)器輸出(chu)端並(bing)接(jie) RC吸(xi)收回路(lu)和壓敏電阻(zu)(MOV)來(lái)實(shí)現(xiàn)輸出(chu)保(bao)護(hù)。選用(yong)原則是(shi)220V選用(yong)500V-600V壓敏電阻(zu)，380V時(shí)可選用(yong)800V-900V壓敏電阻(zu)。
5. 繼電(dian)器輸入(ru)回路(lu)信號(hào)(hao)
在使(shi)用(yong)時(shí)因(yin)輸入(ru)電壓過(guò)(guo)高或(huo)輸入(ru)電流過(guò)大(da)超(chao)出(chu)其(qi)規(guī)(gui)定(ding)的額定參(can)數(shù)時(shí),可考(kao)慮在輸入(ru)端串(chuan)接(jie)分(fen)壓電(dian)阻或(huo)在輸入(ru)端口(kou)並(bing)接(jie)分流電阻(zu),以使(shi)輸入(ru)信號(hào)(hao)不超(chao)過(guò)其(qi)額(e)定(ding)參(can)數(shù)值。
6 在具(ju)體使(shi)用(yong)時(shí),控(kong)制(zhi)信(xin)號(hào)和負(fù)(fu)載電(dian)源要(yao)求穩(wěn)(wen)定(ding)，波動(dòng)(dong)不應(yīng)大(da)於(yu)10%，否則應(yīng)采取穩(wěn)壓措(cuo)施。
7. 在安(an)裝使(shi)用(yong)時(shí)應(yīng)遠(yuǎn)(yuan)離(li)電(dian)磁幹?jǐn)_,射(she)頻幹?jǐn)_源，以防繼(ji)電(dian)器(qi)誤動(dòng)失(shi)控(kong)。
8. 固(gu)態(tài)(tai)繼電(dian)器開(kāi)(kai)路(lu)且(qie)負(fù)(fu)載端有(you)電(dian)壓時(shí),輸出(chu)端會(huì)(hui)有(you)壹定(ding)的漏電流，在使(shi)用(yong)或(huo)設(shè)(she)計(jì)(ji)時(shí)應(yīng)註(zhu)意(yi)。
9. 固(gu)態(tài)(tai)繼電(dian)器失(shi)效更(geng)換(huan)時(shí),應(yīng)盡(jin)量(liang)選用(yong)原型號(hào)或(huo)技(ji)術(shù)(shu)參(can)數(shù)*相(xiang)同(tong)的產(chǎn)品，以便與原應(yīng)用(yong)線(xian)路(lu)匹配，保(bao)證系(xi)統(tǒng)(tong)的可靠工(gong)作(zuo)。
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