2016-07-12

Hydropower development should not only build good projects, but also resolve all potential risks. Only by solving the problem of sustainable development in hydropower development can hydropower play a maximum role in promoting the optimization of the energy structure and reducing greenhouse gas emissions." Richard Taylor, CEO of the International Hydropower Association (IHA), said at the recent International Hydropower Financing Risk Management and Hydropower Sustainability Assessment Code semin

2016-07-12

In SF6 gas-insulated electrical equipment, the magnitude that causes SF6 gas to decompose and discharge to consume energy is divided into three categories: arc discharge, spark discharge, and corona discharge or partial discharge. Arc discharge: Under normal operating conditions, the circuit breaker will produce arc discharge when it is broken; When a short circuit fault occurs in the gas chamber, arc discharge will also occur. The discharge energy is related to the arc current.

2016-07-12

Under normal conditions, SF6 gas is colorless and odorless, has good insulation performance and arc extinguishing performance, once the water in the atmosphere is immersed or the surface of the solid medium is damp, the electrical strength will be significantly reduced. Circuit breakers are outdoor equipment, when the temperature plummets, SF6 gas excess water may condense on the surface of the solid medium and flashover, causing the circuit breaker to explode in serious cases. Pure SF6 gas, in

2016-07-12

SF6 molecule has strong electronegativity, which makes SF6 have strong arc extinguishing ability. Because SF6 molecules become negative ions after adsorption of free electrons, negative ions are easy to combine with positive ions to form neutral molecules, so that the electrical conductivity of the arc space quickly disappears. Especially when the arc current is close to zero, this effect is more significant. If SF6 gas is used to blow the arc, a large number of fresh SF6 molecules are constantl

2016-07-06

Sulfur hexafluoride is one of the important compounds for environmental greenhouse gas emission reduction. The standard gas of sulfur hexafluoride was prepared by weight method. The preparation method, uniformity and stability of the standard gas were investigated. The experimental results show that the prepared sulfur hexafluoride standard gas has good reproducibility, good uniformity in the gas cylinder, and no instability trend during the 12-month development period. Compared with similar sta

2016-07-01

The SF6 gas density relay, like other manometers, will have a certain drift in its alarm and latching values after a period of use; In addition, because the contact action of the density relay is not frequent, the contact action may be insensitive or ineffective. If not inspected, there is a security risk. Check the density relay using the SF6 device charging process: (1) Temperature has a large impact, and it is difficult to ensure accuracy.