該產(chǎn)品為雙柱水平開斷式結(jié)構(gòu)，用于三相交流50Hz高壓電路在無負(fù)載情況下進(jìn)行切換電器及電氣隔離之用的輸變電設(shè)備。
該結(jié)構(gòu)形式的隔離開關(guān)由于接線端子部分采用了撓性軟導(dǎo)體無接點狀態(tài)，使通電性能穩(wěn)定可靠。接觸部分采用了安全固定裝置，隔離開關(guān)在合閘狀態(tài)時，不會因外力（強風(fēng)力、地震、電動力等）使觸頭、觸指脫離接觸。
底座部分采用了防銹軸承結(jié)構(gòu)，使其能長時間靈活地動作，現(xiàn)場安裝操作桿的安裝尺寸誤差，可在安裝架和基礎(chǔ)制作時在±20mm以內(nèi)進(jìn)行調(diào)整，隔離開關(guān)利用操動機構(gòu)進(jìn)行分、合時操作桿旋轉(zhuǎn)90°或180°，其分、合極限位置構(gòu)成3-5°死點結(jié)構(gòu)，隔離開關(guān)即使在外力（強風(fēng)力、地震、電動力等）的作用下，也不能分、合閘。
接地開關(guān)附裝在隔離開關(guān)本體上。接地開關(guān)的接地桿能垂直翻轉(zhuǎn)90°，所以能長時間靈活、輕快地進(jìn)行運作。接地開關(guān)合閘時，即使外力（強風(fēng)力、地震、電動力等）的作用也不會發(fā)生接觸脫離。 接地開關(guān)和隔離開關(guān)帶有可靠性的機械聯(lián)鎖裝置。接地開關(guān)可以和隔離開關(guān)用同樣的操動機構(gòu)進(jìn)行操作
表.GW4隔離開關(guān)的技術(shù)參數(shù)見下表：
電壓kV
穩(wěn)定電流A
動穩(wěn)定電流（峰值）kA
熱穩(wěn)定電流（峰值）kA
1min工頻耐壓（有效值）kV
雷電沖擊耐壓（有效值）kV
分、合閘時間s
接線端額定靜拉力N
開斷小電流A
對地
斷口
對地
斷口
該產(chǎn)品結(jié)構(gòu)特點如下： 外形及安裝尺寸圖
接線端子：
通過有彈性的薄銅片組合而成的軟連接導(dǎo)電帶、導(dǎo)電板和接線端子，形成可靠的導(dǎo)電路徑。當(dāng)隔離開關(guān)處于開閘開關(guān)處于開閘狀態(tài)時，導(dǎo)電帶呈“U”形，反之呈旋渦形。在固定接線端子的導(dǎo)電管上下兩端采用了兩盤軸承，使得接線端子在受到母線張力等引起的機構(gòu)負(fù)荷作用時，也能夠轉(zhuǎn)動靈活地完成分合閘動作，減少對瓷絕緣子的扭矩力。為了使導(dǎo)電座內(nèi)部檢修方便，可不拆下接線端子及其相聯(lián)的母線，而將其結(jié)構(gòu)設(shè)計為揭蓋式或裸蓋式，并能有效解決出線端折斷、發(fā)熱而燒斷軟連接現(xiàn)象。
接觸部分：
主導(dǎo)電回路借鑒國外的技術(shù)，雙銅板式結(jié)構(gòu)，散熱性能優(yōu)于銅管式，強度增加，溫升大大降低，主觸頭具有自清潔能力。觸頭采用可調(diào)外壓式彈簧結(jié)構(gòu)，可長期保持觸頭壓力穩(wěn)定，主導(dǎo)電回路轉(zhuǎn)動連接部分采用軟連接機構(gòu)并轉(zhuǎn)動軸套具有自潤滑功能。
軸承座部分：
高強度的大底基座具備了良好的抗震能力，軸承部分的所有金屬件表面處理都采用熱鍍鋅工藝。軸承座轉(zhuǎn)動軸上下端采用兩盤不銹鋼軸承，軸承潤滑采用優(yōu)質(zhì)二硫化鉬鋰基潤滑脂，使其能夠長期保持動作靈敏可靠，且軸承具有免加油潤滑功能，可保證底座免維護(hù)10-15年。
轉(zhuǎn)動部分：
轉(zhuǎn)動部分全部采用積木化設(shè)計，傳動連桿采用裝配式結(jié)構(gòu)，能適應(yīng)用戶各種方式的聯(lián)動布置和操動機構(gòu)安裝接口，轉(zhuǎn)動鉸鏈采用不銹鋼，能保證長期靈活轉(zhuǎn)動。
零部件：
大型零部件采用熱鍍鋅工藝，螺絲、彈簧和小型金屬零件均采用不銹鋼。
The product is double-column horizontal center breaking structure, for three-phase AC 50Hz high voltage switching electrical circuits and electrical transmission and distribution equipment used in isolation under no-load conditions.
The structure of the terminal part due to the isolation switch with a soft flexible conductor non-contact state, the performance is stable and reliable electricity. Contact parts made of safety fixtures, isolation switch in the closing state, not because of external forces (strong wind, earthquake, electric power, etc.) to make contact, finger disengagement.
The base part is a bearing structure rust, it can be a long flexible operation, field installation error of the operating lever mounting dimensions, when the mounting bracket and can be adjusted based on the production within ± 20mm, the disconnector operating mechanism for the use of , timely or 90 ° rotation operation lever 180 °, the points constituting the aggregate limit position 3-5 ° dead structure, even in the external isolation switch (high winds, earthquakes, electrical power, etc.) the effect can not be divided, closing.
Ground isolation switch attached to the switch body. Ground rod grounding switch can be flipped vertically 90 °, it can be a long and flexible, briskly to operate. When the grounding switch is closed, even if the external forces (strong wind, earthquake, electric power, etc.) the role of the contact does not occur out. Grounding switch and isolation switch with high reliability mechanical interlock devices. Grounding switch disconnectors can be operated with the same actuator
Table technical parameters GW4 isolation switch in the table below:
The maximum voltage kV
A steady current
Dynamic current (peak) kA
Thermal current (peak) kA
1min power frequency withstａnd voltage (rms) kV
Lightning impulse withstａnd voltage (rms) kV
Points, closing time s
N terminal static tensile
A small current breaking
Ground
Fracture
Ground
Fracture
The product structure features are as follows: Overall and installation dimensions
Terminals:
Through a flexible combination of soft thin copper conductive connection with the conductive plates and terminals, forming a reliable conductive path. When the gate is in the switch disconnector is in the state gate, the conductive tape was "U" shaped, whereas the vortex was formed. Fixing upper and lower ends of the conductive tube terminals using two ball bearing, so that the terminal load is applied to the body when subjected to tension caused by the bus, it is possible to complete the rotational flexibility of the closing operation, to reduce the torque force of porcelain insulators. In order to facilitate internal inspection conductive seat, do not remove the terminal and its associated bus, and its structure is designed to Uncovery or bare lid, and can effectively solve the outlet end of the break, fever and soft connection blown phenomenon.
Contact parts:
Leading electrical circuit learn from foreign advanced technology, dual copper structure, thermal performance is better than brass type, increase strength, temperature greatly reduced, the main contact with self-cleaning ability. External pressure contacts with adjustable spring structure can maintain long-term stable contact pressure, leading electrical circuit connecting part with soft rotating coupling mechanism and turn self-lubricating bushings.
Bearing parts:
Outsole base with a good high-intensity seismic capacity, all metal parts are bearing surface treatment using hot dip galvanizing process. The lower end of the rotating shaft bearing using two stainless steel bearings, lubricated with high-quality molybdenum disulfide lithium grease so that it can maintain a sensitive and reliable long-term and bearings lubricated with free features that ensure maintenance base 10-15 years .
Rotating part:
Rotating part of the building blocks used in all design, transmission link the assembled structure, can adapt and actuator linkage arrangement of the various ways to install the user interface, the rotation hinges made ??of stainless steel, to ensure long-term flexible rotation.
Parts:
Large parts are hot-dip galvanizing process, screws, springs and small metal parts are made of stainless steel.
