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 With development of economy , over-head line which is the main way of past power grid has been replaced by cable running line.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:In order to ensure the normal operation of the power system and equipment to achieve a grounding
1) work: grounding is to ensure electrical equipment in normal or accident conditions reliably, the neutral point directly or through special equipment (such as Petersen coil, reactor, resistance, breakdown insurance, etc.) do metal and earth connection.
Q:Maintenance of electrical equipment, security measures to ensure that what
Maintenance of electrical equipment is the safety measures are as follows:1, strict implementation of the "coal mine safety regulations," the provisions of the electricity sector.2, all mechanical and electrical workers must go through rigorous technical training and safety training, qualified after the certificate, undocumented personnel are prohibited posts.3, mechanical and electrical workers to carry the complete power tools and instruments, voltage levels meet the requirements.
Q:On the nameplate of the electrical equipment, what does ith UE ie mean?
Electrical equipment (Electrical Equipment) is in the power system of generators, transformers, power lines, circuit breakers and other equipment collectively.
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:Private enterprises must be free transfer of power facilities
4, in the public substation by the user to invest in the construction of power supply equipment, such as transformers, communications equipment, switches, knife gate, etc., by the unified management of power supply enterprises. Prior to the completion of commissioning, the two parties shall sign an agreement on the operation, maintenance, repair and spare parts.5, temporary electricity and other properties of the power supply facilities, in principle, by the owner of the property rights operation and maintenance management, or by the two sides agreed to negotiate and sign an agreement.Three, in fact, property rights is a "negotiation" thing, to see both sides of "power supply contract" about how the past, users are not willing to power assets, because of electricity on the line, you want the assets, after the electrical accidents and other things, will be responsible for asset owners repair, this is the main reason of users not assets.
Q:Definition of power equipment defects
Personal opinion: defects and hidden dangers have certain differences, can not be equated with the...
Q:What is the equipment that can emit and absorb reactive power in electric power system
The equipment you have listed has this function. The generator and the camera belong to the rotation compensation equipment
Q:Warranty provisions for power supply lines
This is not the regulations of state Power Grid Corp to their line of work area to do some local line area for engineering team to do is sign the contract established general warranty of 1 years seems to include tower structure, grounding resistance, line fitting, a line on what channel estimation problem in within the scope of the contract
Q:What are the necessary equipment for power line project?
There are connection tools, such as hydraulic pliers, crimping pliers, pressing tools, connecting tube, detonation pressure tube; the last is a measuring device, theodolite, rod, etc. in addition to the measuring rod; excavation tools such as shovels, iron, hammer and so on.
Q:Is the installation of railway communication, signal and power related to mechanical and electrical engineering
3, in fact, including the power of the two professional: power and electrification. Including contact network infrastructure, post, wire rack, remote control, lightning protection system, station lighting intelligent control etc..Belong to the scope of the installation should be the station (communication station) equipment into the test, the basis of processing and installation, equipment installation, commissioning of the single body, the electrical subsystem Unicom debugging, the whole system of professional debugging unicom. And other railway professional with the commissioning test, etc..

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