The complete set manufacturing of high-voltage switches is an important component of the transmission and transformation equipment manufacturing industry, occupying a very important position in the entire power industry. Generally speaking, there are mainly two types: fixed type and handcart type, which can be divided into open type, semi closed type, and closed type structurally; In terms of usage environment, it can be divided into indoor and outdoor; In terms of operating methods, there are electromagnetic operating mechanisms, spring operating mechanisms, and manual operating mechanisms.

選用，要根據(jù)使用環(huán)境決定選用戶內(nèi)型還是戶外型，根據(jù)開關(guān)柜數(shù)量的多少和對可靠性要求，確定使用固定式還是手車式開關(guān)柜。固定式開關(guān)柜便宜些，但靈活性不如手車式。對可靠性要求不過高，開關(guān)柜臺數(shù)又較少的變電所，盡量選用固定式開關(guān)柜以降低投資。要結(jié)合高接線設(shè)計確定開關(guān)柜的一次方案，開關(guān)柜的一次方案可查閱相關(guān)電氣手冊。結(jié)合控制、計量、保護、信號等方面的要求，選擇或自行設(shè)計二次接線。選定開關(guān)柜之后柜中主要部件要按使用條件(海拔高度、環(huán)境溫度、相對溫度、日照、風(fēng)速、日溫差等等)及短路情況進行校驗。選定操作機構(gòu)時，要結(jié)合變電所操作電源情況而定。

The selection should be based on the user's indoor or outdoor environment, and the use of fixed or handcart switchgear should be determined based on the number of switchgear and reliability requirements. Fixed switchgear is cheaper in price, but its flexibility is not as good as handcart style. For substations with low reliability requirements and a small number of switch cabinets, fixed switch cabinets should be selected as much as possible to reduce investment. The primary scheme of the switchgear should be determined based on the high wiring design. The primary scheme of the switchgear can be found in relevant electrical manuals. Choose or design secondary wiring based on the requirements of control, measurement, protection, signal, etc. After selecting the switchgear, the main components in the cabinet should be verified according to the usage conditions (altitude, environmental temperature, relative temperature, sunlight, wind speed, daily temperature difference, etc.) and short-circuit conditions. When selecting the operating mechanism, it should be determined based on the operating power supply of the substation.

一般成套的高壓開柜有進線柜、PT柜、饋線柜、計量柜，聯(lián)絡(luò)柜、所用變柜等，高壓進線柜是一段母線的總柜，又稱受電柜，是這段母線接受上級供電系統(tǒng)的連接點，是該段母線電源的輸入端；PT柜是該段母線電壓檢測功能單元，為這段母線提供電壓檢測信號；饋線柜是母線為下一級配電系統(tǒng)輸出端口，可以是下一級母線，可以是負載-電機，可以是電源轉(zhuǎn)換設(shè)備-變壓器，饋線柜因此又稱出線柜；計量柜是為該段母線提供電能測量計費的功能單元；聯(lián)絡(luò)柜是兩段母線相互連通的功能單元；所用變柜是為系統(tǒng)提供小容量降壓配電功能。

A general set of high-voltage switchgear includes an incoming cabinet, PT cabinet, feeder cabinet, metering cabinet, contact cabinet, and used transformer cabinet. The high-voltage incoming cabinet is the main cabinet of a section of busbar, also known as the receiving cabinet, which is the connection point for this section of busbar to receive the superior power supply system and the input terminal for the power supply of this section of busbar; The PT cabinet is a voltage detection functional unit for this section of busbar, providing voltage detection signals for this section of busbar; The feeder cabinet is a bus that serves as the output port of the next level distribution system. It can be the next level bus, the load motor, or the power conversion equipment transformer. Therefore, the feeder cabinet is also known as the outgoing cabinet; The metering cabinet is a functional unit that provides electrical energy measurement and billing for this section of busbar; The contact cabinet is a functional unit where two busbars are interconnected; The transformer cabinet used provides a small capacity step-down power distribution function for the system.

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