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 With development of economy , over-head line which is the main way of past power grid has been replaced by cable running line.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:What is the LCP cabinet of electric power equipment
But not completely covered, PLC cabinet is only for PLC, but it may be installed in the production site, it may also be installed in the control room.
Q:What equipment is needed in the national grid project
Two equipment: all kinds of protective devices, automation devices and systems, including communications equipment, computer equipment, etc.; monitoring equipment: computer, industrial television and related equipment; fire equipment;......
Q:What is the good rate of equipment determined by the rating of substation equipment
The "system" can easily calculate the depreciation and repair costs of fixed assets in order to determine the economic life of the equipment, the best time to update. As a result of the "system" many functions of the set, so that enterprises can accurately grasp the technical status of the equipment, so as to determine the technical life of the equipment is very useful.
Q:The cost calculation of power equipment
These costs are based on the situation at the scene, for example: 1 your losses exceed the standards of the power supply bureau, will be fine
Q:What is the definition of abnormal equipment, equipment failure, equipment failure, equipment accident
Accident: has occurred, resulting in loss of damage,Such as short circuit arc circuit breaker tripping, burning, scrap.
Q:In power system, the general conditions for the selection of electrical equipment are
Suitable voltage rating, suitable for workplace and environment, necessary protection
Q:Is the GIS in the electric power high voltage switch cabinet
High voltage electrical (mainly above 35kV) exposed to the air, common substation circuit breaker, isolating switch, bus, phases, equipment, and equipment between between and so must have a relatively large safety distance. This area is relatively large, but also exposed to the outside of the security risks are more. GIS is a kind of technology, the bus CircuitBreakers isolating switch for high-voltage electric appliances shell pack, seal filled with six sulfur hexafluoride gas, according to the elements of seal, not a whole big box, such as every bus from the outside is a large cylinder etc.. This equipment can be very compact layout, and a sealed shell, but also more secure.High voltage switchgear is only a device installed in a cabinet, and this is generally high voltage 10kV, up to 35kV, and then there is no general high switch cabinet this form. Of course, you can also use GIS technology. But generally speaking, GIS is more than 110kV GIS switch station.You can Baidu image search GIS switch station". You can see that the big cylinder together is the GIS switch equipment, large cylinder which is the bus, circuit breakers and other equipment, see pictures more intuitive.
Q:Electric power equipment start-up and commissioning of the project there is a difference?
The start of the equipment is started in the single test.
Q:In the city emergency security system, what are the relevant power equipment
The key is not the equipment problem, but to attach importance to the power emergency platform and power dispatching platformOf course, in addition to EPS lighting / power emergency power supply, there are the following emergency equipment:
Q:Three sets of complete sets of power equipment exports what is it
Three refers to the anti moisture, salt spray, anti mildew.According to the complete set of electrical as well as five: (1) to prevent the wrong points, close circuit breaker;2) to prevent the pull and load isolation switch;3) to prevent the electrification (hanging) grounding switch (line);4) to prevent the ground wire (switch) with circuit breaker (isolation switch);5) to prevent straying into the charged interval.

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