工廠變電所低壓開關(guān)設(shè)備及作業(yè)概述(編輯修改稿)
2025-03-21 06:12 本頁面
【文章內(nèi)容簡介】 onnection 6. Withdrawable unit 7. Control circuit plug 8. Auxiliary contact 9. Motor operator 10. Operating cycle counter 11. Electronic releases (control units) 12. Parameterization device 13. Earthfault protection module 14. 4line LCD display 15. Door sealing frame 16. Rated current module (rating plug) 17. EmergencyStop mushroom pushbutton 18. Closing release, voltage release 構(gòu)成 框架斷路器 ACB 低壓斷路器 1. NZM circuitbreakers, PN and N switchdisconnectors 2. Terminal cover 3. Control circuit terminal 4. Tunnel terminal for Al cables 4. Box terminal 5. Clip plate 6. Rear connection 7. Plugin and withdrawable unit 8. Standard auxiliary contact 8. Tripindicating auxiliary contact 9. Rotary drive with shaft support 10. Sidemounted lever 11. Extension shaft 12. Doorcoupling rotary handle 13. Rotary handle with rotary drive 14. Remote operator 15. Insulating surround 16. Designation label 17. Lockable toggleswitch 18. Communication module (DMI) 19. EASYLINKDS data plug 20. PROFIBUS interface 21. Voltage release or earlymake auxiliary contact 22. Delay unit for voltage release 23. Spacers 構(gòu)成 MCCB 低壓電器 低壓接觸器 LowVoltage Contactors 接觸器 概述 接觸器 ? 接觸器是用來頻繁控制接通或斷開主回路的一種控制電器。主要用于控制電動(dòng)機(jī)。 ? 接觸器具有遙控通斷電路功能，具備頻繁操作、工作可靠、性能穩(wěn)定等優(yōu)點(diǎn)。 ? 國內(nèi)產(chǎn)品： CJ1 1 1 1 2 40等系列 ? 國外公司： ABB、西門子、施耐德、默勒、羅克韋爾、富士等 概述 接觸器 ? 使用類別 交流接觸器應(yīng)根據(jù)其通斷任務(wù)和通斷條件來選擇其使用類別。 AC1 無感或低感負(fù)荷、電阻爐 AC2 繞線轉(zhuǎn)子異步電動(dòng)機(jī)的起動(dòng)、停止 AC3 鼠籠型異步電動(dòng)機(jī)的起動(dòng)、停止 AC4 鼠籠型異步電動(dòng)機(jī)的起動(dòng)、反接制動(dòng)、可逆控制、點(diǎn)動(dòng) 此外，還有 AC AC AC AC8 概述 The Contactor Utilization categories for contactors Type of current Utilization category Typical examples of application AC AC1 Noninductive or slightly inductive loads, resistance furnaces AC2 Woundrotor motors: starting, switchoff AC3 Squirrelcage motors: stating, switchoff, switchoff during running AC4 Squirrelcage motors: starting, plugging, reversing, inching DC DC1 Noninductive or slightly inductive loads, resistance furnaces DC3 Shunt motors: starting, plugging, reversing, inching, dynamic braking DC5 Series motors: starting, plugging, reversing, inching, dynamic braking 接觸器 構(gòu)成 （電磁式）接觸器由電磁系統(tǒng)、觸頭系統(tǒng)、滅弧裝置、復(fù)位彈簧等幾部分組成： 1. 電磁系統(tǒng) ：可動(dòng)鐵心（銜鐵）、靜鐵心（電磁鐵）、線圈 2. 觸頭系統(tǒng) ：主觸頭、輔助觸頭 3. 滅弧裝置 ：滅弧柵 接觸器 1 接觸器 2 浪涌吸收器 Suppressors 3 熱繼電器 Overload relay 4 輔助觸頭模塊， 2極，插入式 2 pole, plugin type 5 輔助觸頭模塊， 4極，插入式 4 pole, plugin type 6 輔助觸頭模塊， 2極，側(cè)裝式 2 pole, side mounting 輔件 起動(dòng)器 AcrossTheLine 或 DirectOnLine (DOL) Starter 直接起動(dòng)器 ? Actuation of pushbutton I energizes the coil of contactor Q11. The contactor switches on the motor and maintains itself after the button is enables via its own auxiliary contact Q11/1413 and pushbutton 0. ? Contactor Q11 is deenergized, in the normal course of even
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