MRD-BJ Transformer Neutral Ground Resistor

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In distribution systems technique of neutral ground is usually categorized into neutral unground, neutral ground via resistor, and neutral-point grounding via arc suppression coil. Differnent grounding ways decide various operating ways. With development of economy , over-head line which is the main way of past power grid has been replaced by cable running line. Meanwhile, some new equipments such as hermetic compact structure of SF6 swichgear, twisted polyethylene cable and zinc oxide arrester are more and more widely applied. Therefore, non-effective grounding technique is unsuitable to present situation. As a result, to set neutral point grounding effectively is the important facet of power supply we should work on.

If neutral grounding resistance cabinet is installed, the current flowing through grounding point and neutral point would be much lower than that when metallicity grounding. Therefore, adopting neutral grounding via resistance could decrease transient overvoltage when single-phase grounding, and eliminate arc flash hazards like transient overvoltage and some resonant overvoltage associated with the first ground fault, and moreover it could adopt relays to quickly locate the fault circuit and clear it up.

Mingrui has outstanding technical researching team and superior equipments, specially concentrate on research & development, production, sales and service of neutral grounding series products of power distribution system. The transformer neutral grounding resistance cabinet we developed and produced is applicable to 6~35KV power distribution grid of cable running lines in cities, large industrial enterprises, factories, airports, seaports, subway and etc. as well as 0.66KV system in mine digging and 0.4kv/6kv/10kv system in power plants.

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Q:Power equipment sales process, the customer asked the most questions thank you
6, some of the common causes of the failure of the equipment and processing needs to understand, it is possible that users will ask some of the problems they encounter oh;The last thing is the most important, in order to get the order: it depends on how to ensure that the interests of their clients, and this look at your company policy, the interests of the customer relationship and ensure equal importance! Basically so many questions, other topics. Absolute hand!
Q:What are the relevant national standards for power equipment?
I don't know what to look for on the Internet
Q:Definition of power equipment defects
Personal opinion: defects and hidden dangers have certain differences, can not be equated with the...
Q:How to solve the short circuit of emergency communication equipment
As you can see (xxxxx). But in the national disaster or war, the government can expropriate these hand car car.Thank you! I hope my reply will satisfy you!
Q:1 what are the main aspects of power line fire? 2 what are the main aspects of electrical equipment fire?
Five, fire control room and electrical fire monitoring detector set over 8 independent electricFire monitoring detector six, electrical fire monitoring system settings should affect the power supply system
Q:How to strengthen the management of electric power information communication equipment
2 equipment based information is not complete. In the past is mainly due to the importance of equipment installation and use of the process to ignore the basic data, no serious equipment complete basic data collection and sorting, resulting in a lack of power information communication equipment basic information.3 equipment inspection is not in place. Regular inspection of power communication equipment can clear the health status of the equipment, and can detect the problems or defects in the equipment. At present, the problems existing in the inspection work of the electric power communication equipment are as follows: (1) there is not a reasonable equipment inspection cycle. (2) in the process of inspection and inspection of the equipment does not follow a certain inspection process. (3) during the inspection process, the equipment running state inspection is ignored, and the inspection of the equipment room condition, water proof and fire prevention ability is ignored. (4) the inspection of the sanitation and environmental temperature of power communication equipment is ignored.
Q:What is the power equipment network
Hello: * power equipment network license, refers to the equipment after a rigorous examination of the administrative departments of electric power, can be put into the power grid stability [], [], no adverse effects on the power grid [] reliable products. From the technical point of view, the detection of more projects, more stringent requirements, you can apply to the local power management department, the network testing, examination and approval procedures, qualified to participate in bidding operations.
Q:How to handle the qualification test, what kind of power equipment
(a) legal person qualification and perfect organization; (two) the registered capital and net assets of 60 million yuan; (three) the last 3 years to bear the following first items listed, third project and second sub items listed in any one project, and the project quality: above 1 thousand and 330 volts voltage substation 2 or 220 thousand volt substation 5; more than 2 thousand and 330 volt overhead lines 300 kilometers or 220 thousand volt overhead line of 500 kilometers; more than 3 thousand and 220 volt cable line 80 kilometers or 100 meters above the level crossing tower crossing project 1.
Q:Power equipment Market Overview
A quarter of decline in the national power investment in power generation equipment production units significantly reduced, China's total production of 23 million 103 thousand and 900 kilowatts, up sharply down 14.42%, a decline of 5.52 percentage points over the previous year to expand. The first quarter of 2013, investment in power engineering construction in our country continue to decline in 2012 continued to decline, resulting in power generation equipment production continued to decline; and the power grid construction investment growth, stimulating part of power transmission equipment production increased steadily.Since 2013, with the rapid development of the national UHV power grid construction, China's power grid project investment to maintain rapid growth momentum, pulling the steady increase in the production of transformers. In the first quarter, China's power grid project investment 58 billion 200 million yuan, a substantial increase of 34.7% year on year, the cumulative production capacity of the transformer is more than 31806.95 KVA, an increase of 6.46%, the growth rate of the previous year increased by 6.10 percentage points
Q:What are the power equipment which is used in the field of steam turbine
The main power equipment including power equipment and power supply equipment two categories, power generation equipment is the main power plant boiler, steam turbine, gas turbine, turbine, generator, transformer, power supply equipment is the main transmission line, voltage transformer, contactor etc..The steam turbine is the power equipment, except for the thermal power plant and central heating power station, is also used to drive other equipment, large fan and water pump, ship steel plant, such as large enterprises, pharmaceutical chemical screw compressor etc..Steam turbine and thermal power stations are generally used as the main steam turbine companies, followed by a wide range of applications in pharmaceutical, chemical, metallurgical, petrochemical enterprises.

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