綜合布線中TT系統的缺點
- 优惠信息:未填写
- 地址:香港觀塘鴻圖道37-39號鴻泰工業大廈4樓4室
- 联系人:創世服務
- 联系电话:点击查看完整号码
详情介绍
綜合布線的TT系統通常將電源中性點的接地叫做工作接地,而設備外露可導電部分的接地叫做保護接地。
綜合布線中TT系統的缺點
1)低、高壓線路雷擊時,配變可能發生正、逆變換過電壓
2)低壓電器外殼接地的保護效果不及IT系統。
3)當電氣設備的金屬外殼帶電(相線碰殼或設備絕緣損壞而漏電)時,由於有接地保護,可以大大減少觸電的危險性。但是,低壓斷路器(自動開關)不一定能跳閘,造成漏電設備的外殼對地電壓高於安全電壓,屬於危險電壓。
4)當漏電電流比較小時,即使有熔斷器也不一定能熔斷,所以還需要漏電保護器作保護,因此TT系統難以推廣。
5)TT系統接地裝置耗用鋼材多,而且難以回收、費工時、費料。
* * * * * *
創世服務有限公司是一間提供專業數據中心架設公司,擁有一群專業團隊貼心地關注客戶的要求,並提供優質的服務。
想了解更多關於「綜合布線中TT系統的缺點」的內容,請瀏覽創世官網:http:/*.hk
地址: 香港觀塘鴻圖道37-39號鴻泰工業大廈4樓4室
電話:852-31063235
——————
Disadvantages of TT system in integrated wiring
1) When lightning strikes on low and high voltage lines, the*r may undergo positive and negative transitions.
2) The protection effect of low-voltage electrical enclosure grounding is not as good as that of IT systems.
3) When*tal casing of the electrical*nt is charged (phase line is*ntact with the casing or the insulation of the*nt is damaged and leaks), the risk of electric shock can be greatly reduced due to the grounding protection. However, the low-voltage circuit breaker (automatic switch) does not necessarily trip, causing the voltage of the earth leakage device to be higher than the safe voltage, which is a dangerous voltage.
4) When the leakage current is relatively small, even if there is a fuse, it may not be able to be blown, so the leakage protector is* required for protection, so the TT system is difficult to promote.
5) TT system grounding*s a lot of steel, and it is difficult to recycle, labor, and materials.
* * * * * *
LIV is a professional data center to set up*pany, with a group of professional team intimate attention to*r*nts, and provide quality services.
For*rmation about 'Disadvantages of TT system in integrated wiring',please visit : http:/*.hk
Address: Unit 4, 4/F., Hung Tai Industrial Building,37-39 Hung To Road, Kwun Tong, Hong Kong
Tel: +852 3106 3235
联系我的时候请说是在搜即讯信息网上看到的,谢谢。
綜合布線中TT系統的缺點
1)低、高壓線路雷擊時,配變可能發生正、逆變換過電壓
2)低壓電器外殼接地的保護效果不及IT系統。
3)當電氣設備的金屬外殼帶電(相線碰殼或設備絕緣損壞而漏電)時,由於有接地保護,可以大大減少觸電的危險性。但是,低壓斷路器(自動開關)不一定能跳閘,造成漏電設備的外殼對地電壓高於安全電壓,屬於危險電壓。
4)當漏電電流比較小時,即使有熔斷器也不一定能熔斷,所以還需要漏電保護器作保護,因此TT系統難以推廣。
5)TT系統接地裝置耗用鋼材多,而且難以回收、費工時、費料。
* * * * * *
創世服務有限公司是一間提供專業數據中心架設公司,擁有一群專業團隊貼心地關注客戶的要求,並提供優質的服務。
想了解更多關於「綜合布線中TT系統的缺點」的內容,請瀏覽創世官網:http:/*.hk
地址: 香港觀塘鴻圖道37-39號鴻泰工業大廈4樓4室
電話:852-31063235
——————
Disadvantages of TT system in integrated wiring
1) When lightning strikes on low and high voltage lines, the*r may undergo positive and negative transitions.
2) The protection effect of low-voltage electrical enclosure grounding is not as good as that of IT systems.
3) When*tal casing of the electrical*nt is charged (phase line is*ntact with the casing or the insulation of the*nt is damaged and leaks), the risk of electric shock can be greatly reduced due to the grounding protection. However, the low-voltage circuit breaker (automatic switch) does not necessarily trip, causing the voltage of the earth leakage device to be higher than the safe voltage, which is a dangerous voltage.
4) When the leakage current is relatively small, even if there is a fuse, it may not be able to be blown, so the leakage protector is* required for protection, so the TT system is difficult to promote.
5) TT system grounding*s a lot of steel, and it is difficult to recycle, labor, and materials.
* * * * * *
LIV is a professional data center to set up*pany, with a group of professional team intimate attention to*r*nts, and provide quality services.
For*rmation about 'Disadvantages of TT system in integrated wiring',please visit : http:/*.hk
Address: Unit 4, 4/F., Hung Tai Industrial Building,37-39 Hung To Road, Kwun Tong, Hong Kong
Tel: +852 3106 3235
联系我的时候请说是在搜即讯信息网上看到的,谢谢。
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