低壓成套開關(guān)設(shè)備防護(hù)等級(jí)為IP65時(shí)溫升試驗(yàn)問題分析

 

張業(yè)真

（福建省產(chǎn)品質(zhì)量檢驗(yàn)研究院，福建 福州 350002）

 

    摘 要：低壓成套開關(guān)設(shè)備在滿足防護(hù)等級(jí)IP65 前提下對(duì)其進(jìn)行溫升試驗(yàn)，針對(duì)試驗(yàn)過程中存在主開關(guān)斷路器脫扣以及某些溫升測(cè)量部位溫升值超過允許值的現(xiàn)象，結(jié)合三次溫升試驗(yàn)測(cè)試數(shù)據(jù)結(jié)果進(jìn)行原因分析，提出適當(dāng)增加排氣孔或者利用排氣扇進(jìn)行排氣散熱，選用開關(guān)性能良好以及額定電流比溫升試驗(yàn)電流高一個(gè)等級(jí)，適當(dāng)提高導(dǎo)線、銅排截面積尺寸等改進(jìn)措施，來避免問題的再次出現(xiàn)。

    關(guān)鍵詞：低壓成套開關(guān)設(shè)備；防護(hù)等級(jí)；溫升試驗(yàn)；改進(jìn)措施

    中圖分類號(hào)：TM643     文獻(xiàn)標(biāo)識(shí)碼：A     文章編號(hào)：1007-3175(2018)04-0056-03

    Abstract: The temperature rise test was carried out under the premise meeting the IP65 low-voltage switchgear. In allusion to the phenomenon that the main circuit breaker tripped and the temperature of some measured parts was beyond the permitted value in the test process, combining with three-time temperature rise tests data this paper analyzed the results, proposed to add gas vents or to use fans to carry out breathing and heat dissipation, selected the good switching performance and higher grade ratio of rated current to temperature rise test current, and properly improved the measures of sectional area size of wire and copper bar to avoid the problem reappearing.

    Key words: low-voltage switchgear; ingress protection; temperature rise test; improvement measure