1, what is the magnetic field?

A: In the magnetic poles or any current loop around and after being magnetized inside and outside the object, have a magnetic effect on the magnetic needle or moving charge, the magnetic force of the space called the magnetic field. It is similar to the electric field, but also has the power and energy characteristics.

2, What is the insulation material? What are the main types?

A: Insulation materials, also known as dielectric. Popular talk about insulating material is to prevent the current through which the material, that is, non-conductive material. Commonly used insulating materials are: gas: such as air, sulfur hexafluoride and so on. Liquid: such as transformer oil, cable oil, capacitor oil, etc .; solid materials: including two types, one inorganic insulating materials such as mica, asbestos, electric porcelain, glass, the other is organic matter such as paper, cotton yarn, Plastic and so on.

3, what is the soft magnetic material? Its characteristics, what is the use?

A: The soft magnetic material refers to the remanence and coercivity are very small ferromagnetic materials, such as silicon steel, pure iron and so on. Is characterized by easy magnetization, easy to demagnetization and hysteresis loop narrower. Soft magnetic materials commonly used to make electrical, transformers, electromagnets and other electrical core.

Features are not easy magnetization, nor easy to lose magnetism, hysteresis loop wide.

Hard magnetic materials commonly used to make a variety of permanent magnets, speaker magnets and electronic circuits in the memory components.

4, what is the eddy current? What are the pros and cons in the production?

A: The conductor inside the alternating magnetic field (including ferromagnetic material), will be induced in the cross-section perpendicular to the direction of magnetic lines closed loop current, known as eddy current.

Lee: The use of eddy current principle can be made of induction furnace smelting metal; the use of eddy current can be made of magnetic, inductive electrical instruments; meters in the meter is also made using eddy current theory.

Disadvantages: in the motor, transformer and other equipment, due to the existence of eddy current will have additional losses, while reducing the magnetic field caused by the reduction of electrical equipment efficiency, the equipment capacity can not make full use of.

5, if the inductor resistance AC, through the role of DC, then the capacitor is not also have this effect? ​​If not, what is its role?

A: The capacitor does not have this effect. Capacitance is DC blocking current, through AC, that is, when the capacitor plus DC current at both ends, the capacitive reactance is infinite, this circuit is unreasonable, there is no current. When the two ends of the capacitor plus AC, the capacitance Xc = 1 / 2Ï€fC, the circuit is on, there is current.

6, What is the power factor? What is the significance of improving the power factor?

A: In the AC circuit, the active power and apparent power ratio. That P / S = COSφ, called power factor.

The significance lies in: Under the condition that the total power is invariable, the bigger the power factor, the greater the active power that the power supply supplies. In this way, to improve the power factor, you can take full advantage of transmission and power generation equipment.

7, what is the same polarity?

A: In an alternating main flux induced by the two electromotive force coil, at a moment, if one side of the coil in a positive potential, the other side of the coil will have one end potential is positive, these two The corresponding end is called the same polarity end (or the same name end).

8, What are the main components of the transformer?

A: The main components of the transformer are:

(1) Body: Including iron core, winding, insulation parts and leads.

(2) voltage regulator: the tap changer, divided into non-excitation voltage regulator and on-load voltage regulator

(3) fuel tank and cooling device.

(4) Protection devices: including oil conservator, safety airway, moisture absorber, gas relay , oil purifier and temperature measuring device.

(5) bushing.

9, the transformer tank and cooling device What is the role?

A: The transformer tank is the transformer housing, built-in iron core, winding and transformer oil, at the same time play a role in cooling.

Transformer cooling device's role is that when the upper transformer oil temperature difference, the formation of oil circulation through the radiator, the oil cooled by the radiator back to the tank, reduce the transformer oil temperature. In order to improve the cooling effect, air cooling, strong oil cooling or strong oil cooling can be adopted.

10, the role of transformer oil is what?

A: The role of transformer oil in the transformer insulation, cooling; in the load switch for extinction.

What is the role of adding antioxidants in transformer oil?

A: slow down the rate of deterioration of oil, extend the life of oil.

12, why transformer oil filter?

Snap Off Knives

We have a wide range of snap-off knives for both professional use and hobby projects. Amongst other things, there are robust knives in aluminum, fine knives for detail work, and lightweight knives in plastic. Our snap-off knives are well suited for cutting materials such as cardboard, wallpaper, plastic, paper, carpets and rubber, and are available in both large and small versions.Also provides a large variation of snap-off blades, that keep high quality and sharpness.

Snap Off Knives,Retractable Utility Knife,Snap Off Knife Blades,Retractable Snap Off Knives

Ningbo Jiangbei Chuangjia Stationery Factory , https://www.nbrazorblades.com