MRD-BJ Transformer Neutral Ground Resistor
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- 30 unit/month
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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 With development of economy , over-head line which is the main way of past power grid has been replaced by cable running line.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.
- Q: What are the main interference sources of the two power system
- Power system electromagnetic environment consists of one or two devices, of which there are a variety of electromagnetic disturbance and interaction, the current electric power system is developing towards higher voltage, higher capacity, power network is more intensive and more complex systems, more advanced equipment to the direction of development, to guide electromagnetic disturbance of power system more serious and complicated. On the other hand, the advanced power systems using more advanced automation and other electronic and computer control, measurement, communication and protection system, and solid state electronic based advanced equipment and system tolerance electromagnetic disturbance ability is weaker, more susceptible to electromagnetic environment.
- Q: The production and transportation process of electric power
- The equipment of the two system comprises a measuring device, a control device, a relay protection device, an automatic control device, a DC system and necessary auxiliary equipment. Power system voltage level has 220V, 380V (0.4 kV), 3 kV, 6 kV, 10 kV, 20 kV, 35 kV, 66 kV, 110 kV, 220 kV, 330 kV, 500 kV, 750kV, 1000kV. With the improvement of motor manufacturing process, 10 kV motor has been mass production, so the use of kV, 6 kV has been less than 20 kV, 66 kV is also rarely used. The power supply system is 10 kV and 35 kV. Transmission and distribution system to 110 kV or above. Power plant generator has 6 kV, 10 kV and, with a total of 20 kV, users are 220V, 380V (0.4 kV) low voltage system 20kV.
- Q: What are the characteristics of the grounding of the power system and equipment?
- According to the use and nature of grounding, it can be divided into "working grounding" and "security grounding".
- Q: The problem of electric power equipment withstand voltageWhy does the pressure decrease when the altitude is high? The air is thin, is not easy to breakdown (vacuum breakdown is not very low atmospheric pressure)
- Although the degree of vacuum is higher than that of the low altitude, the relationship between the insulation strength and the degree of vacuum, especially from the atmosphere to the beginning of the high vacuum. Insulation strength is high - low - high change process
- Q: What are the customer groups faced by power intelligent equipment?Products such as electric capacitor reactive power control (capacitor module), reactive power compensation controller, the series of electric power meter, active filtering equipment, power monitoring system, energy management system, operating system and DC power system accessory products.
- The capacitor can send reactive power in AC voltage under (capacitive current), if the capacitor is connected to the load (such as motor) or power supply equipment (such as transformer) on the run, then load or power supply equipment to "absorb reactive power", just by the reactive power supply capacitor "issue", this is the parallel compensation. Parallel compensation can reduce the energy loss, improve the voltage quality, improve the power factor and improve the power supply capacity of the system.
- Q: What is the amount of equipment used? Higher profits? Do you have any power generation companies in China?
- 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 specific enterprises and units are used to test the power of the equipment ah
- The other really did not ~ ~ ~ ~ ~What do you mean by electrical testing equipment??? High? Low?
- Q: What equipment are used in the power, can help to divide some of the details, as well as the type of equipment under the type of equipment
- 3 from the degree of importance can be divided intoCore equipment and auxiliary equipment4 from the price can be divided intoLarge valuable equipment, general equipmentPower plant and substation electrical equipment is divided into primary equipment and two equipment. A device (also known as the main equipment) is the main component of the power system, it is the direct production, electricity transmission and distribution equipment, including power generators, power transformers, circuit breaker, isolating switch, power bus, power cables and transmission lines. The two device is a device for the control, regulation, protection and monitoring of a device, which comprises a control device, a relay protection and automatic device, a measuring instrument, a signal device, etc.. The two device obtains the electrical connection with the primary device through a voltage transformer and a current transformer. The primary equipment and its connected circuit is called primary circuit. Two equipment in accordance with certain rules to connect to achieve some technical requirements of the electrical circuit called the two circuit.Relay protection and safety automatic device, dispatching automation and communication system are the two systems.
- Q: How long has the power of power electronic equipment delivered water
- Pneumatic conveying device has good dustproof effect; easy to realize mechanization and automation, reduce labor intensity, saving manpower; in the transport process, can be a variety of technology operations at the same time, such as mixing, crushing, sorting, drying and cooling; to prevent the material moisture, pollution or mixed with debris and other advantages, so it has been applied in the casting department, metallurgy, chemical, building materials, food processing etc.. Its main disadvantage is that the power consumption is large
- Q: Power equipment Market Overview
- The first quarter of 2013, China's economy once again showed signs of slowing down, iron and steel, nonferrous metals and other raw material prices low volatility, electric power equipment manufacturing production costs at a relatively low level; at the same time by the industry overcapacity, fierce competition in the product market, a common means of low bid for corporate competition. Affected by the above two factors, the 1 quarter of China's power equipment manufacturing industry most price decline, in the electric power equipment Chinese Machinery Industry Federation statistics, 22 small manufacturing industries, there is decline in price index rose only 16 sub sectors, 6 sub industry price index.
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MRD-BJ Transformer Neutral Ground Resistor
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1 unit
- Supply Capability:
- 30 unit/month
OKorder Service Pledge
OKorder Financial Service
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