In this paper, it focuses on the protection of non-earthing system at the neutral point of 110kV main transformer, and puts forward a new method for the protection scheme of parallel discharge gap of voidless flower of zinc lightning arrester through the function analysis of lightning arrester and discharge gap.
On the basis of conventional composite snubber circuit,CPRS is constituted by adding a diode VDs, a parallel discharge circuit(Rd // Cs) and a winding Na. Thereinto, winding Na is an additional wind-ing coupled with high frequency transformer.
The parallel discharge circuit Rd // Cs can transmit the electrical energy and has the functions of prohibiting current circulation and sorbing turn-off transient energy.
The voltage balance protection according to connections of capacitor group is used for the inrush current and resonance during its switch-in,the series reactor for the explosion during its operation and the parallel discharge coil for the residual voltage during its switch-out.
Oscillations in the parallel discharge of two supersonic nonisobaric jets
A reaction model is developed for the parallel discharge of Cu(II)Cit and Ni(II) in which the reactions for nickel deposition are catalysed by active sites permanently renewed at the surface of the growing alloy.
The electrical fields due to the space charge of positive ions in a plane-parallel discharge gap are measured by means of an electron avalanche.
This paper describes an ultraviolet photopreionized highpressure CO2 laser. This laser employs a cable-coupled, parallel-discharge preioniized circuit and a main discharge circuit, which share a common power supply. It has a number of advantages, such as less energy dissipation, good stability, simplicity of configuration and so on. This laser can be operated at 8-12 atm with a peak power output of about 20 MW. Continuous tuning over total frequency range of 100cm-1 on the P and R branches...
This paper describes an ultraviolet photopreionized highpressure CO2 laser. This laser employs a cable-coupled, parallel-discharge preioniized circuit and a main discharge circuit, which share a common power supply. It has a number of advantages, such as less energy dissipation, good stability, simplicity of configuration and so on. This laser can be operated at 8-12 atm with a peak power output of about 20 MW. Continuous tuning over total frequency range of 100cm-1 on the P and R branches of 9.4μand 10.4μ vibrational-rotational bands of CO2 has been achieved. Preliminary studies of continuous tuning and frequency pulling are performed.
Steam operated double effect lithium bromide absorption refrigerating machine type 3XZH-150 is a first energy saving equipment of this type certified in China. This article introducetdechnical data, principle of wo- rk. construction specifications and test results of this machine.It is poi- nted out. that the new scheme of parallel discharge of the weak solution into the high and low pressure generators.improved eliminators. and shipme- nt from factory in packaged form not only improved the machine performance,...
Steam operated double effect lithium bromide absorption refrigerating machine type 3XZH-150 is a first energy saving equipment of this type certified in China. This article introducetdechnical data, principle of wo- rk. construction specifications and test results of this machine.It is poi- nted out. that the new scheme of parallel discharge of the weak solution into the high and low pressure generators.improved eliminators. and shipme- nt from factory in packaged form not only improved the machine performance, but also made the users easy to operate. The test results showed. that the research and development of this machine are successful, and the new ideas incorperated in the machine constructions are feasible. This article is illu strated with measured data and performance curves.
In this paper, it focuses on the protection of non-earthing system at the neutral point of 110kV main transformer, and puts forward a new method for the protection scheme of parallel discharge gap of voidless flower of zinc lightning arrester through the function analysis of lightning arrester and discharge gap. The principle philosophy can also apply to the protection of 220kV grade insulation main transformer with non-earthing.
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