一、       概述

高壓交流電動機液態(tài)軟起動柜適用于額定電壓為3~10KV大、中型同步或異步電動機的軟起動。在靜態(tài)工作條件下，與電抗器性能相同；在動態(tài)工作條件下，可實現(xiàn)無級的連續(xù)起動。由于其利用液體電阻的負溫度特性，使電機的端電壓逐步上升，起動轉(zhuǎn)矩也逐步增加，因而電機起動比較平穩(wěn)。特別是該系統(tǒng)結(jié)構(gòu)簡單、可靠性強，不僅經(jīng)濟實用，而且安裝和操作簡單、維護方便。
它廣泛應(yīng)用于冶金、建材、礦山、石化、供水、電力行業(yè)等的泵類、風機、壓縮機、破碎機、皮帶傳輸機等各大、中容量高壓電機的重載起動，是傳統(tǒng)的電抗器降壓起動、直接起動的理想的替代產(chǎn)品。
二 工作原理
該裝置是在電機定子回路中串可變液體電阻的一種降壓起動方式，即隨著主電動機的起動，裝置自動改變液體電阻動、定極板之間的間距，使電阻線性均勻減小，電機端電壓均勻提高的一種起動方式。
主機起動結(jié)束后，軟起動裝置從主回路中完全脫離或處于零電位，活動極板自動復(fù)位，為下次起動作好準備。

Supply water resistance ark soft start

An overview,

High voltage ac motor soft starter liquid tank is suitable for the rated voltage is 3 ~ 10 kv large and medium-sized synchronous or asynchronous motor soft start. Under the condition of static work, the same as the reactor performance; Under the dynamic working conditions, and can realize stepless continuous starting. Due to the use of negative temperature characteristic of liquid resistance, the voltage of the motor is gradually increased, the starting torque is also gradually to increase, thus the motor starting smoothly. The system has simple structure, high reliability, in particular, not only economic and practical, and installation and simple operation, convenient maintenance.

It is widely used in metallurgy, building materials, mining, petrochemical, water supply, power industry pump, fan, compressor, such as crusher, belt transmission machine and so on each big, overload capacity of high voltage motor starter, is a traditional reactor step-down starting, direct starting the ideal alternative products.

Working principle of the two