戶外配變低壓綜合配電箱的改進(jìn)

吳錦虹　余伙慶

摘 要：文章設(shè)計(jì)一種安裝于戶外的配變低壓綜合配電箱，具有四個(gè)獨(dú)立隔室的配變低壓綜合配電箱。配變低壓綜合配電箱的材料為不銹鋼，安裝在戶外臺(tái)區(qū)變壓器上，集計(jì)量、電能分配、無(wú)功補(bǔ)償功能于一體。配變低壓綜合配電箱分為四個(gè)獨(dú)立的隔室，四個(gè)隔室相互獨(dú)立，采用冷軋鋼板分開(kāi)，在一個(gè)室出現(xiàn)故障時(shí)，不會(huì)影響其他隔室；箱在側(cè)面、電容室底部開(kāi)有通風(fēng)進(jìn)氣孔，通風(fēng)進(jìn)氣孔內(nèi)側(cè)焊接有不銹鋼絲網(wǎng)，既滿足通風(fēng)的要求，又可以滿足防護(hù)等級(jí)的要求。箱體頂部采用“人”字形結(jié)構(gòu)的頂蓋，同時(shí)在頂蓋的長(zhǎng)邊開(kāi)有通風(fēng)孔，用于出風(fēng)散熱；在箱體的底部開(kāi)有進(jìn)出線孔，采用專用的電纜進(jìn)線格蘭，防護(hù)等級(jí)高；在箱體的兩側(cè)裝有M16的銅螺柱，用于搭接進(jìn)線側(cè)接地線，方便施工；門(mén)板采用內(nèi)凹槽設(shè)計(jì)，凹槽內(nèi)貼有硅橡膠，箱門(mén)關(guān)閉時(shí)壓住箱體的凸出部，保證防護(hù)等級(jí)。

關(guān)鍵詞：配變低壓綜合配電箱；獨(dú)立隔室；高防護(hù)等級(jí)；散熱良好；方便施工

中圖分類(lèi)號(hào)：TM64 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：2095-2945（2019）04-0105-03

Abstract： The paper relates to a distribution transformer low voltage integrated distribution box which is installed outdoors and has four separate compartments. The material of the distribution transformer low voltage comprehensive distribution box is stainless steel， which is installed on the transformer in outdoor area and integrates the functions of metering， energy distribution and reactive power compensation. The low voltage distribution box of distribution transformer is divided into four separate compartments， the four compartments are independent from each other and are separated by cold rolled steel plate， when one room fails， the other compartments will not be affected； the box is provided with ventilation inlet holes at the side and at the bottom of the capacitance chamber. The inside of the ventilation inlet is welded with stainless steel wire mesh， which not only meets the requirements of ventilation， but also meets the requirements of the protection grade. The top of the box adopts the top cover of the "man" shaped structure， and at the same time， a vent hole is opened on the long side of the top cover for air flow and heat dissipation， and an inlet and outlet line hole is opened at the bottom of the box body， and a special cable is used to enter the line， and the protection level is high； M16 copper stud is installed on both sides of the box for lapping into the ground wire on the side of the wire for convenient construction； the door plate adopts the design of the inner groove with silicone rubber affixed in the groove and the protruding part of the box body is pressed when the door is closed to ensure the protection level.

Keywords： distribution transformer low voltage comprehensive distribution box； independent compartment； high protection grade； good heat dissipation； convenient construction

配變低壓綜合配電箱，是10/0.4kV供電系統(tǒng)中用來(lái)接受和分配電能的低壓配電設(shè)備，一般安裝在戶外配電變壓器低壓側(cè)。箱內(nèi)通常配備進(jìn)線斷路器、配電斷路器、避雷器、內(nèi)部保護(hù)斷路器、負(fù)荷開(kāi)關(guān)、隔離開(kāi)關(guān)等主電器元件。另外，還配備有電流互感器、電能表等計(jì)量電器， 以及用于低壓無(wú)功補(bǔ)償?shù)碾娙萜鞯仍O(shè)備。目前，配電箱廣泛使用于農(nóng)村、城市配電網(wǎng)和工礦企業(yè)內(nèi)部配電網(wǎng)，安裝在10/0.4kV戶外臺(tái)架變壓器的桿架上，對(duì)低壓負(fù)荷實(shí)現(xiàn)配電、計(jì)量、無(wú)功補(bǔ)償?shù)裙δ堋?/p>