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              真空接觸器的種類及特點

              來源:http://www.cekidots.com/ 日期:2022-01-18 發布人:admin

              民熔真空接觸器通常由絕緣隔電框架、金屬底座、傳動拐臂、電磁系統、輔助開關和真空開關管等部件組成。當電磁線圈通過控制電壓時,銜鐵帶動拐臂轉動,使真空開關管內主觸頭接通,電磁線圈斷電后,由于分閘彈簧作用,使主觸頭分斷。

              The civil melting vacuum contactor is usually composed of insulating insulation frame, metal base, transmission crank arm, electromagnetic system, auxiliary switch and vacuum switch tube. When the electromagnetic coil passes through the control voltage, the armature drives the crank arm to rotate to connect the main contact in the vacuum switch tube. After the electromagnetic coil is powered off, the main contact is disconnected due to the action of the opening spring.
              ①民熔真空開關管是以上封蓋、下封蓋、金屬波紋管和陶瓷管等組成,該真空開關管,外殼采用95瓷絕緣材料制成波紋式的瓷管,它具有爬電距離大、機械強度高、耐熱和耐沖擊的特點。真空開關管內封裝一對動靜觸頭,觸頭材料采用耐磨且低截流值的Cu-W-Wc,這樣在滿足開斷性能的條件下,減小開斷過程中由于截流引起的過電壓,提高了真空開關管的使用電壽命。當金屬波紋管軸向運動時帶動動觸頭做分合閘動作。
              ① Minrong vacuum switch tube is composed of upper cover, lower cover, metal bellows and ceramic tube. The shell of the vacuum switch tube is made of 95 porcelain insulating material. It has the characteristics of large creepage distance, high mechanical strength, heat resistance and impact resistance. A pair of dynamic and static contacts are encapsulated in the vacuum switch tube. The contact material is cu-w-wc with wear resistance and low cut-off value. In this way, under the condition of meeting the breaking performance, the overvoltage caused by cut-off in the breaking process is reduced and the service life of the vacuum switch tube is improved. When the metal bellows moves axially, it drives the moving contact to make opening and closing action.
              ABB接觸器代理
              ②電磁系統考慮實際吸力特性和反力特性良好配合,以及發揮接觸器運行時噪音低、節電的優點,采用直流雙線圈由起動和維持兩繞組組成,通過輔助開關切換,為了便于用戶進行交流電源操作,接觸器帶有橋式整流裝置。
              ② Considering the good cooperation between the actual suction characteristics and reaction characteristics, and giving full play to the advantages of low noise and power saving during the operation of the contactor, the electromagnetic system adopts DC double coil, which is composed of two windings for starting and maintaining. It is switched by auxiliary switch. In order to facilitate the operation of AC power supply, the contactor is equipped with bridge rectifier.
              ③機械鎖扣:當閉合線圈通電時,接觸器吸合,機械鎖扣鎖?。寒斆摽劬€圈通電時,機械鎖扣脫扣,接觸器釋放,脫扣線圈在熱態時,其電壓在Us85%-110%范圍內使接觸器可靠釋放。
              ③ Mechanical latch: when the closing coil is energized, the contactor is pulled in and the mechanical latch is locked: when the tripping coil is energized, the mechanical latch trips and the contactor is released. When the tripping coil is in hot state, its voltage is within US85% - 110% to release the contactor reliably.
              工作原理:
              working principle:
              接觸器的工作原理是:當接觸器線圈通電后,線圈電流會產生磁場,產生的磁場使靜鐵芯產生電磁吸力吸引動鐵芯,并帶動交流接觸器點動作,常閉觸點斷開,常開觸點閉合,兩者是聯動的。當線圈斷電時,電磁吸力消失,銜鐵在釋放彈簧的作用下釋放,使觸點復原,常開觸點斷開,常閉觸點閉合。直流接觸器的工作原理跟溫度開關的原理有點相似。
              The working principle of the contactor is as follows: when the contactor coil is energized, the coil current will generate a magnetic field. The generated magnetic field causes the static iron core to generate electromagnetic suction to attract the moving iron core, and drives the AC contactor to act. The normally closed contact is disconnected and the normally open contact is closed. The two are linked. When the coil is powered off, the electromagnetic suction disappears, and the armature is released under the action of the release spring to restore the contact, open the normally open contact and close the normally closed contact. The working principle of DC contactor is somewhat similar to that of temperature switch.
              特點:
              characteristic:
              真空接觸器熄弧能力強,耐壓性能好,操作頻率較高,壽命長,無電弧外噴,體積小、重量輕。
              Vacuum contactor has strong arc extinguishing ability, good voltage resistance, high operating frequency, long service life, no arc external spraying, small volume and light weight.
              缺點:
              Disadvantages:
              維修周期較長。真空接觸器的真空滅弧室制造時工藝要求很高,如果工藝不良,滅弧室的真空容易下降。觸頭材料材質不好,在分斷電流時會出現 "截流過電壓"現象,即在分斷電流時,由于真空滅弧室的熄弧能力很強,電弧電流不是自然過零時切斷,而是從電流的某一值突然降到零,由此而出現高的過電壓。截流電壓會危及電氣設備的安全運行。
              The maintenance cycle is long. The vacuum interrupter of the vacuum contactor is manufactured with high process requirements. If the process is poor, the vacuum of the interrupter is easy to drop. The contact material is not good, and the phenomenon of "cut-off overvoltage" will appear when breaking the current, that is, when breaking the current, due to the strong arc extinguishing ability of the vacuum arc extinguishing chamber, the arc current is not cut off when it crosses zero naturally, but suddenly drops from a certain value of the current to zero, resulting in high overvoltage. The cut-off voltage will endanger the safe operation of electrical equipment.
              除此了這些接觸器以外,還有氣動式接觸器、電氣氣動式接觸器、鎖扣接觸器等幾種接觸器。
              In addition to these contactors, there are pneumatic contactors, electro pneumatic contactors, latch contactors and other contactors.
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