the 2010 green house gas emissions (GHG) survey showed drops of 15.2% in air [...] unesdoc.unesco.org 至于教科文组织的气候中和行动,2010 年温室气体排放(GHG)调查显示,与 2009 年相比,空中排放下降了 15.2%,建筑物和地面旅行排放下降了 27%(但巴西除外的基本飞 行数据仍在上升)。 unesdoc.unesc...
The bonding point for CSST must be at the first piece of steel or copper pipe where the gas service enters the home. This is because lightning can blow holes in CSST, causing a gas leak.A pair of 8-ft.-long metal ground rods are driven into the earth next to your house to provide...
Ayeal Ice Stream; E = Echelmeyer Ice Stream; CF = calving front; RIS = Ross Ice Shelf; GL = grounding line; RFIS = Ronne-Filchner Ice Shelf; LIS = Larsen Ice Shelf with the darker blue area showing the extent of the Larsen Ice Shelf that collapsed in ...
One phase distribution is typically used in small residental building. The power company feed live wire and neutral+gound wire to your house. The power in the power company system is typically three phase power and the power company then feed one phase to your house (you neighbour can have ...
promulgated in March 1984. This Standard has following important changes in techniques when compared with the two Standards before they were amended: 1) The provision of resistance grounding for AC electric installation protection ground of resistance grounding system is added; 2) The provision of che...
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Zhejiang Volcano Electrical is a professional factory for prodcuing 10-40.5kV electrical equipments for power transmission, including all types of indoor&outdoor vacuum circuit breakers, automatic current recloser, SF6&vacuum load break switch, isolating switch, earthing switch, air&gas ...
the case of a faulty washing machine and a water tap at the same time. In order to minimise this risk, an 'equipotential zone' is created by connecting the services to the main earthing point. Such services are metal pipes (gas, water, etc.), central heating, metallic ventilation trunking...
5. A motor-driven grounding switch adaptable for use with a gas-insulated transmission system comprising, in combination, a support plate (62) adaptable to close an opening in said system, means defining a hollow guide chamber (73) secured to said support plate, a tubular movable grounding con...
1.- Do you have a method to estimate the current values. 2.- The breaker system is used in system with units exceeding the 15 MW, in some countries. Gas Units such as the LM 2500 ( 22MW ISO ratings ) use just grounding via distribution transformers. 3.- The use of breakers in sys...