What is an insulator? What is the role of an insulator?

Insulators, or edge elements, are special cis-acting elements. Its function is only to prevent activation or inhibit the transmission of the action on chromatin, thus limiting chromatin activity to the domain. If an insulator is placed between the enhancer and the promoter, it prevents the enhancer from activating the promoter.

On the other hand, if an insulator is between the active gene and the heterochromatin, it can protect the gene from inactivation caused by the expansion of heterochromatinization. Some insulators have only one function, while others have both.

Definition of technical terms.

Chinese name: insulator English name: insulator Definition 1:

A device that is installed between conductors of different potentials or between conductors and ground potential members, and can withstand voltage and mechanical stress. Discipline: Electric Power (First-level Discipline); Transmission Lines (Secondary Discipline) Definition 2:

A DNA sequence about a few hundred base pairs long that prevents eukaryotic gene regulatory proteins from exerting influence on distant genes. It can buffer the repression of heterochromatin, and when it is located next to the gene and its regulatory region, the gene can be expressed normally regardless of its position in the genome; When it is located between the enhancer and promoter of the target gene, the action of the enhancer can be blocked. Discipline:

Biochemistry and Molecular Biology (first-level discipline) ; Gene Expression and Regulation (Secondary Discipline) Definition 3: A cis-acting element. It is about a few hundred nucleotide pairs in length, and is usually located in a regulatory sequence between positive or negative regulatory elements of the promoter.

Discipline: Genetics (first-level discipline) ; Molecular Genetics (Secondary Discipline).

An insulator is a special type of insulation control that can play an important role in overhead transmission lines. In the early years, insulators were mostly used in power poles, and slowly developed into a lot of disk-shaped insulators hung at one end of the high-type high-voltage wire connection tower, which was to increase the creepage distance, usually made of glass or ceramic, and was called insulators. Insulators play two basic roles in overhead transmission lines, namely supporting wires and preventing current from returning to the ground, these two roles must be guaranteed, and insulators should not fail due to various electromechanical stresses caused by changes in environmental and electrical load conditions, otherwise the insulators will not have a major effect, and will damage the use and operation life of the entire line.

What are the functions of oil fume purification insulators? Where is the location of the insulator of the oil fume purifier.

The main function of the edge is to insulate and fix current-carrying conductors such as busbars and wires. The insulator is made of porcelain part and fittings glued with cement adhesive, the porcelain part ensures that the insulator has good electrical insulation strength, and the fittings are used for fixing. It is generally installed on high-voltage or low-voltage switchgear, bus bridge, Zen old wall or bracket.

Expand knowledge: Some insulators are similar in appearance to lightning arresters, please pay attention to the distinction when selling back. (The arrester is usually connected with a grounding wire).

1. Electrical or posture insulation.

2. Mechanical insulation.

3. The insulator plays two roles in the overhead closed Zheng transmission line, one is to support the wire (with sufficient mechanical strength), and the second chamber to prevent the current from returning to the ground (with a certain nitrogen insulation strength of the car).

It refers to a safety measure that uses non-conductive substances to isolate or wrap charged bodies to protect against electric shock. Good insulation is the most basic and reliable means to ensure the safe operation of electrical equipment and lines and prevent the occurrence of personal electric shock accidents. Insulation can generally be divided into three categories: gas insulation, liquid insulation, and solid insulation.

In practical applications, solid insulation is still the most widely used and reliable insulating substance.

Under the action of strong electricity, the insulating material may be broken down and lose its insulating properties. Among the above three types of insulating substances, after the gas insulating material is broken down, it can restore its inherent electrical insulation properties by itself once the external factor (strong electric field) is removed; After the solid insulating material is broken down, it irreversibly loses its electrical insulation properties completely. Therefore, the insulation of electrical wiring and equipment must be selected in accordance with the voltage level.

and must be adapted to the use environment and operating conditions to ensure the safety of insulation.

The main power of the insulator is to firmly support and fix the current-carrying conductor, form a good insulation between the current-carrying conductor and the ground, the insulator (commonly known as the porcelain bottle) is composed of two parts, the porcelain part and the fittings are glued with cement adhesive, the porcelain part is to ensure that the insulator has good electrical insulation strength, and the fittings are used to fix the insulator.

When the local overheating caused by flashover occurs due to voltage impulse, it will not lead to the bursting of the tempered glass body of the insulator, and all external factors will have an impact on the performance of the insulator, therefore, it also puts forward higher requirements for the design of the glass insulator, and the design requirements of the glass insulator need to be treated strictly, with a strict design and practical basis.

In order to increase the creepage distance, it is usually made of glass or ceramic, which is called an insulator. Insulators are transmitting electricity overhead.

There are two basic capacitive functions in the inner line, that is, to support the wire and prevent the current from returning to the ground, these two functions must be guaranteed, the insulator should not fail due to various electromechanical stresses caused by changes in the environment and electrical load conditions, otherwise the insulator will not have a major effect, and it will damage the use and operation life of the entire line.

An insulator is a special type of insulating control for bai.

du, yes.

Zhi plays an important role in overhead transmission lines. In the early years, there were many special insulators.

Used for electric poles, slowly developed in the high-type high-voltage wire connection tower at one end of the hanging a lot of disc-shaped insulators, it is to increase the creepage distance, usually made of glass or ceramic, called insulators. The insulator should not fail due to various electromechanical stresses caused by changes in environmental and electrical load conditions, otherwise the insulator will not have a significant effect, and it will damage the use and operation life of the entire line.

Insulators can be divided into suspension insulators and pillar insulators according to different installation methods; According to the different insulation materials used, it can be divided into porcelain insulators, glass insulators and composite insulators (also known as synthetic insulators); According to the different voltage levels, it can be divided into low-voltage insulators and high-voltage insulators; According to the different environmental conditions used, the pollution-resistant insulators used in polluted areas are derived; According to the different types of voltage used, DC insulators are derived; There are also various insulators for special purposes, such as insulating cross arms, semiconductor glaze insulators, tension insulators for power distribution, spool insulators and wiring insulators. In addition, according to the different breakdown possibilities of insulators, they can be divided into two categories: type A insulators that are not breakable and type B that can be broken down.

Insulators are installed on conductors of different potentials or between conductors and grounding members that can withstand voltage and mechanical stress for reuse.

Answer. There are many types of insulators and come in different shapes. Although the structure and shape of different types of insulators are quite different, they are all composed of two parts: insulators and connecting fittings.

Functional insulation, also known as conductor insulation, is only sufficient to ensure the proper operation of electrical appliances, while the insulation between insulating conductors between conductive parts of different potentials does not provide anti-shock insulation.

Development of multi-functional insulated operating rod: the use of multi-functional operating rod reduces the working time of the operator on the pole and repeated climbing steps, greatly reduces the labor intensity of high-altitude workers, and solves the practical difficulties in the work through PDCA cycle activities.

Two structures are proposed: built-in and external, the former is embedded in the insulated operating rod by the electroscope, and the latter is attached to the outside of the insulated operating rod by the electroscope. The electrical insulation properties and mechanical strength of these two structures were tested, and the external structure was finally determined.

Functional insulation is the requirement between two electrical wires (transformer secondary); Basic insulation, which is to prevent the human body from being electrocuted (transformer primary); Additional insulation is to add another layer of insulating sleeve (outer sleeve of power cord); Double insulation is two layers of sleeves (power cords); To strengthen the insulation is to wrap the insulating tape (transformer).

The insulation between the conductor components is only necessary for the specific function of the device. See GB Insulation Fit for Equipment in Low-Voltage Systems Part 1: Principles, Requirements and Tests. But the definition feels stiff, and I don't know what it means.

What kind of insulation are you talking about?