HA(QA)、HP(QP)系列隔離開關(guān)主要用于有高短路電流的配電  電路和電動機(jī)電路中，作為手動不頻繁操作的開關(guān)、隔離開關(guān)和應(yīng)急開關(guān)，并作電路保護(hù)之用。開關(guān)可直接開閉電動機(jī)等高電感負(fù)載，特別適用于抽屜式開關(guān)柜的成套裝置中。

本系列隔離開關(guān)由刀型靜觸頭、滾動動觸頭及滅弧裝置組成的接觸系統(tǒng)  均組裝在由耐弧工程塑料制成的封閉底座內(nèi)，能達(dá)到零飛弧。操作機(jī)構(gòu)由具有  彈簧儲能的連桿傳動機(jī)構(gòu)構(gòu)成，靠彈簧力完成開關(guān)的分、合，使開關(guān)動作無關(guān)  人力操作。手柄由操作手柄和傳動軸等構(gòu)成，屬旋轉(zhuǎn)操作方式。當(dāng)手柄旋轉(zhuǎn)操  作時,使操作機(jī)構(gòu)彈簧儲能，靠儲能的彈簧力釋放帶動動觸頭與靜觸頭形成  合、分兩種狀態(tài)，從而達(dá)到開關(guān)分、合主電路的目的。

本開關(guān)的上部可裝一個或二個輔助開關(guān)，每個輔助開關(guān)有一對電器上分  開的常開觸頭和常閉觸頭，能使控制回路明確指示開關(guān)主電路的通斷情況。

Series HA(QA)、 HP(QP) switch-disconnector are mainly applied in the  distribution circuits and motor circuits with high short-circuit currents as the  power switches. As the switch handle is in rotary operation, they are especially  suitable for installation and application in drawer type switch cabinets. Technical  performances confirm to standards IEC60947.3 and GB14048.3.This series  switches are of closed structure design. The contact system is composed of  static knife contacts, moving rolling contacts and arc quenching sets that are all  fitted in the sealed case made of arc resistant engineering plastic and zero arc  flash out is achieved. The switching mach-anism is of reliable spring energy  stored independent manual operation style.On the upper part of the. switch  utmost two auxiliary switches may be quipped in, each having a set of electrical  separated normal open and normal closed contacts.