JT
Lv 7
JT asked in 科學及數學工程學 · 1 decade ago

什麼是 Ring Main Unit (RMU)?

什麼是 Ring Main Unit (RMU)?

有什麼用途?

Update:

多謝何博士

何以解釋 RMU 究竟是 ring circuit 的那一個部份? 能否圖示?

Circuit Breaker 能否做到 RMU 的效果?

3 Answers

Rating
  • 9W2HL
    Lv 7
    1 decade ago
    Favorite Answer

    Ring Main Unit (RMU) 為中電壓及高電壓網絡分配時用既一種環形制櫃(供電俾變壓器“火牛”), 通常為 1 Loop-in, 1 Loop-out, 1 Feeder 或 2 Feeder (Tx), 常見電壓為12KV ~ 24KV

    圖片參考:http://www.tamco.com.my/images/P_06.jpg

    圖片參考:http://www.bikudo.com/photo_stock/212877.jpg

    Distribution networks are normally formed by interconnecting a number of ring shaped grids. Distribution transformers are then connected to the system by T-offs. Instead of specifying and selecting individual components required for a T-off, the required components are frequently available in an integrated package known as a ring-main unit (RMU).

    Ring-main units normally consist of switches on both sides of the T-off, one to open the ring and another at the connection to the distribution transformer using one of the following:

    - Switch and a fuse separately

    - Switch-fuse combination"

    Source and further information:

    http://www.kema.com/.../RMU.aspx

    就好似我地低電壓13A插蘇環形電路一樣.

    圖片參考:http://upload.wikimedia.org/wikipedia/commons/thum...

    圖片參考:http://upload.wikimedia.org/wikipedia/commons/thum...

    2009-12-07 23:30:28 補充:

    其實 RMU 就好似 分離器 Isolator, 輸出有啲用保險絲有啲用 Vaccum Circuit Breaker (VCB) 或 SF6,全部都係中電壓值高電壓用既,請參考圖片

    http://img4.imageshack.us/img4/6968/ringmain.png

    通常有一個或兩個 OFF POINT, 當有任何一條電纜發生故障時,可以由另一條電纜供電,減少停電時間,至少要有兩個 H 牌(香港) B 牌(馬來西亞)註冊電工在現場至可以操作以上既設備。

    2010-08-23 18:15:25 補充:

    1 = AP + 1 = CP

    2010-08-23 22:37:35 補充:

    因爲高電壓屬於危險工作,有兩個人就係避免往往 [當局者迷] 情形之下做錯咗步驟

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  • 1 decade ago

    何博士

    我想請問,點解要2個rew先操作得?係同一隻rmu要2個人定係其中一個要去另一隻掣到一同操作?我係h新丁.見過有人帶電落地.有無方法可以減少意外?

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  • JT
    Lv 7
    1 decade ago

    Ring Main Unit 通常都是 3 相嗎?

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