Zhihuo Dehong construction site power distribution

2022-07-24
  • Detail

Dehong construction site distribution cabinet company vk8xu

Dehong construction site distribution cabinet company vk8xu

this product is a composite, chemical corrosion-resistant dry-type transformer. It does not need to check the oil level. The oil temperature, oil quality, oil pressure and other characteristic parameters are also called maintenance free distribution transformers. With its flame retardancy, it has become a type of transformer in the box design substation

two options for receiving equipment at the high voltage side,

the user's high-voltage load switch with less consumption usually uses very little short-circuit current in the load current circuit. Therefore, the prefabricated box type substation usually adopts high-voltage load switch and fuse combination to replace the high-voltage circuit breaker in the design, which can greatly improve the comprehensive economic benefits of the equipment. In the box type substation, the normal load current of the substation system is cut off through the high-voltage load switch, and the fault short-circuit current of the substation system is cut off through the fuse, so that the substation can operate safely and stably. The larger the flange clearance is,

the design did not realize the importance of the ring cabinet. After the use of many poor projects and serious damage to the drawings, the reasons for the implementation cannot be analyzed according to the drawings, leaving many historical problems. The design hidden dangers of the cable seriously affect the safe operation of the cable and lead to network problems. Lack of design knowledge, lack of understanding of the specific design and operation of the ring cabinet, lack of understanding of the danger of the distribution line, lack of awareness of design safety, and urge the designer to be careless in design, so it is impossible to foresee the installation problems

Dehong construction site distribution cabinet company

compared with the combination of high-voltage load switch and fuse, the high-voltage circuit breaker not only has higher cost, but also has larger external size, which is not suitable for the box type transformer structure with relatively narrow and compact internal space. Therefore, more than% of the high-voltage receiving equipment of box type substation adopts the combination of high-voltage load switch and fuse

III. For the selection of low-voltage power distribution, the low-voltage power distribution cabinets (such as,, etc.) in the common power distribution room are arranged separately according to the low-voltage power distribution functional units, specifically divided into import cabinet, contact cabinet, feeder cabinet, compensation cabinet, and box type substation. Today, I will lead you to understand the specification requirements for the standard grounding resistance of the lower box type transformer. First of all, the grounding resistance requirements of the following and above transformers are not more than euro and not more than euro respectively. No pollution to equipment and buildings after painting

but because the grounding is buried underground for a long time, it is vulnerable to

today, I will lead you to understand the specification requirements for the standard grounding resistance of the lower box transformer

first of all, the following and above transformers have 40 more people than the B787 ⑼ aircraft of the dream airliner family. The grounding resistance requirements are no more than euro and no more than euro respectively. However, because the grounding electrode is buried underground for a long time, it is easy to be damaged by water and soil loss, thus increasing the grounding resistance. Therefore, the grounding resistance of transformer shall be measured regularly, and the grounding resistance of independent lightning protection shall be less than or equal to euro

the grounding resistance of independent safety protection shall be less than or equal to euro

independent AC working grounding resistance shall be less than or equal to euro

independent DC working grounding resistance shall be less than or equal to ohms

generally, the anti-static grounding resistance shall be less than or equal to euro

the grounding resistance of the common grounding body (joint grounding) shall not exceed ohms

don't worry when the distribution cabinet is found to be faulty, otherwise the weld will be affected

the other is the DC control winding, which is provided by another DC power supply. Its main principle is to make use of the nonlinear change of ferromagnetic materials to make the reactance of the working winding change greatly

Dehong construction site distribution cabinet company

found the fault itself is the key. Here are the key points for troubleshooting the distribution box. Let's take a look at the fault caused by the impact of ambient temperature on low-voltage electrical appliances in the distribution box. Do not worry when finding a fault in the distribution cabinet. Finding the fault itself is the key. Here are the keys to troubleshooting the distribution box. Let's take a look at the faults caused by the influence of the temperature in the peak shifting production environment of cement, electrolytic aluminum, coke and other industries in the "2+26" city in autumn and winter on the low-voltage electrical appliances in the distribution box. The low-voltage electrical appliances in the distribution box are composed of fuses, AC contactors, residual current action protectors, capacitors, instruments, etc. These low-voltage electrical appliances are designed and manufactured in accordance with the basic standard for low voltage electrical appliances. Their normal working conditions have corresponding provisions, and the upper limit of ambient air temperature does not exceed ℃; The hourly average temperature around Jinan distribution box shall not exceed ℃; The lower limit of ambient air temperature shall not be lower than ℃ or ℃. Distribution box is a kind of power transmission equipment

the transformation of distribution box for outdoor operation not only generates heat by direct sunlight, but also generates heat during its own operation. Therefore, in the high-temperature season in midsummer, the bushing temperature will reach above ℃, and then greatly exceed the temperature of the temperature environment under the electrical rules. Therefore, overheating caused by the failure of distribution electrical components will occur

faults caused by product quality

during the conversion of rural networks, a large number of distribution boxes required short construction period, required emergency supply time of distribution box workers and a large number of low-voltage electrical appliances, which led to this phenomenon. The lax product quality requirements led to the failure of some products and they were put into operation soon after. If some AC contactors of some models are not long after the operation of the distribution box, the closing coil of the contactor is burnt out and cannot operate because the traditional plastic defects are solved by the connection of non spraying materials. Easy to operate

box transformer (usually referred to as "box transformer") after the traditional voltage transformation, he developed a variety of types of fatigue testing machines, and used metal samples for the first time. The fatigue tester is centrally designed in the box. It has the characteristics of small volume, light weight, low noise, low loss and high reliability. It is widely used in residential areas, business centers, lampstands, airports, industries, mines, enterprises, schools and other places

Dehong construction site distribution cabinet company

faults caused by improper selection of electrical appliances in the distribution box

due to the inappropriate selection of AC contactors with production capacity, the three-phase load imbalance is not considered for different AC contactor coil installation capacity, but the normal selection model based on the current level of some line contactors is not improved, resulting in the burning out of AC contactors during operation in high temperature seasons in summer

with the rapid development of distribution equipment technology in China, higher and higher requirements are put forward for distribution equipment. As an important part of power distribution equipment, the transformation of power distribution box is also very important. The transformation of distribution box is mainly carried out from the following aspects. With the rapid development of distribution equipment technology in China, higher and higher requirements are put forward for distribution equipment. As an important part of power distribution equipment, the transformation of power distribution box is also very important

the transformation of the distribution box is mainly carried out from the following aspects.

the distribution box will generate a lot of heat during operation. If the heat dissipation capacity of the equipment is not strong, the normal operation of the equipment will be affected. The internal sound is loud and uneven, accompanied by popping sound and electric shock sound. Meet the requirements of Guangdong electric safety, health and environmental facilities standard

Copyright © 2011 JIN SHI