Explosion Proof Capacitor

cbb65 capacitor

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What are the common protection devices for power capacitors?

Power capacitors are widely used as one of the z economic ways of reactive power compensation. However, due to the high failure rate of capacitors, which are directly connected to the power grid, any problems may cause economic losses or more serious casualties. Therefore, each capacitor manufacturer will set certain protection devices for capacitors according to the relevant technology when producing capacitors, which is also one of the selling points of capacitors.

What are the common protection devices for power capacitors? What is the working principle? How to choose the  Motor Run Capacitor Manufacturers focus according to your needs? Come and see today's article! Common power capacitor protection measures: 1. Over-voltage pull-off protection Over-voltage pull-off is one of the common protection devices for power capacitors Z. It adds connection points to the top cover terminals and internal terminals of the power capacitor. When the top cover pressure rises gradually, the following connection points will be separated gradually.

It manifests itself in the form of active disconnection of the capacitor to avoid the undesirable consequences of a fault. Once the power capacitor has common faults such as oil leakage, bulging, breakdown aging, etc., it will lead to a large amount of gas generated by the metal film inside the capacitor, increasing the internal pressure and thus triggering the overpressure pull-off protection.

2, protection of high current fuse In addition to overvoltage operation, the grid harmonics will also have a certain impact on the capacitor. Once there is a large current in the capacitor, the fuse will immediately disconnect the capacitor link. 3, equal pressure explosion-proof protection permeable hole power capacitor bulging, oil leakage and other faults are common faults of capacitors, timely replacement can be properly solved. Once there is high current in the capacitor, the fuse will immediately disconnect the capacitor link.

3、Equal pressure explosion-proof protection permeability hole power capacitor bulging, oil leakage and other faults are common faults of capacitors, which can be properly solved by timely replacement. Capacitor explosion is what everyone does not want to see, and once it happens, it will not be able to recover to the original state in a short time.

Therefore, some manufacturers in the market design and produce power capacitors with unique vent design, which can always keep the pressure balance inside and outside and completely eliminate the possibility of capacitor explosion. Such explosion-proof power capacitors are more suitable for scenarios with complex working conditions or unfortunate explosions.

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How to judge the main parameters of the chip capacitor?

Chip capacitor is used in electronic equipment in the key electronic devices, the main use of universal, when many people do not know about chip capacitors do not understand, how to judge the main parameters of chip capacitors to be good, chip capacitors small size, because it is not like other capacitors can be the main parameters printed in the case

The main parameters of chip capacitors can refer to the following points.

First, the volume and leakage, as well as the actual capacitance and larger leakage nominal capacity.　　

Second, the additional working voltage, power capacitors in the power circuit can be long-term stable, solid work, the larger AC voltage accepted, also known as voltage withstand.

Temperature coefficient, the relative change of capacity for every 1℃ change in temperature within a certain  ac motor Capacitor temperature scale, the lower the temperature coefficient the better.

Fourth, insulation resistance, used to illustrate the size of leakage. Small volume of capacitor, insulation resistance is very large electrolytic capacitor insulation resistance is relatively small. In contrast, the larger the insulation resistance, the better, the leakage machine filter will also be small.

Fifth, on the loss, in the electric field, SMD capacitors in the unit of time heating the energy consumed.　　

Six, the frequency characteristics, the chip capacitor's electrical main parameters with the frequency of the electric field and the transformation of the characteristics .

Chip capacitors have different models and application parameters, so please select chip capacitors according to the engineering drawing parameters provided by engineers.

The above is about how to determine the main parameters of chip capacitors related to the introduction for the time being to this, if you want to know more about the application of capacitors, resistors and other electronic components, as well as the selection of knowledge, then

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What is the role of electrostatic protection diodes in automotive electronics

With the vigorous development of the automobile industry, the original mechanical car has become an intelligent running robot with a soul, which has correspondingly promoted the development of the automotive electronics industry and has become a current hot field. As we all know, no matter what product, safety is always the top priority, especially the car, which is related to the safety of yourself and your family. Various circuit protection measures in the car are slightly improper, such as partial functional failure or the death of the car, there is a high probability of an accident. In the field of increasingly intelligent and integrated new energy vehicles, electrostatic protection diodes are very important for the protection of  Ac Capacitor automotive circuits. Various electronic circuits and precision components in the car, no matter where they are in the car, are vulnerable to sudden electrical transients.

The following are some particularly common automotive protection lines: 1. Traditional communication bus: that is, CAN/LIN, which is a two-wire communication bus suitable for automotive internal control and monitoring functions. The exposed transient shock will cause CAN/LIN Transceiver failed. 2. Power bus: In transient protection, it includes electrostatic diodes embedded in modules and high-impact TVS diodes, which can handle vehicle load dumping; 3. High-frequency antennas for communication/broadcast reception: Because the front end of the RF amplifier Static electricity is very sensitive, so bidirectional, low capacitance ESD protection diodes are required. 4. SIM slot: In order to accept the influence of human-computer interaction, electrostatic diode protection is required.

At present, automotive circuit protection components are not limited to fuses, but also electrostatic protection diodes, TVS diodes, and varistors. The overvoltage protection of electrostatic diodes is also worthy of attention. You must know that in automotive electronics, all electronic devices are faced with the threat of electrostatic discharge and car parabola. Therefore, overvoltage protection is very important for automotive electronics. Therefore, when car manufacturers purchase electrostatic diodes, they must find qualified manufacturers. If they are replaced with inferior products, it is likely to cause great loss of corporate image.

We take the automotive electronic electrostatic protection solution as an example. Because of the need for buttons and USB interfaces, the testing standards are constantly being updated and updated. ISO has also increased the requirements for special testing of vehicles. Without a reliable circuit protection device, it is impossible to To meet this requirement, those car manufacturers must find qualified manufacturers when purchasing electrostatic diodes. If they replace them with inferior products, it is likely to cause great loss of corporate image.

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Factory requirements of safety capacitors and its different forms

For safety capacitors, we may not be familiar with it or know it, but our life is inseparable from it. It often appears in small household appliances and power chargers. Today, I will briefly describe the safety capacitors. Factory condition and its different forms. The function of safety capacitors is just like its name. When encountering bad products or improper use, electric shock, fire and other accidents, it will reduce the harm, reduce the user's property loss, and protect the user's safety. It is often used in circuits. Bypass, energy conversion, coupling, blocking through traffic, filtering, control, etc. Safety capacitors play an important role in the electrical appliances we use.

The production of safety capacitors must comply with safety regulations and pass the safety standard test certification, because not every country's household electricity voltage is the same, generally after the safety capacitors are produced, the voltage will be tested in the relevant departments, so When we see a safety capacitor, its surface  Run Capacitor  will be printed with the safety certification LOGO of many countries. There are many types of safety capacitors. The most common and the most used are Y capacitors and X capacitors. Most of the X capacitors are square, that is, shaped like a box, and its capacity is uF level. The yellow X capacitor is the most common X capacitor on the market, and it is also the earliest capacitor on the market. The appearance of the yellow safety capacitor is eye-catching, and it is laser printed, with good printing effect and clear handwriting. Blue shell and red shell are the two capacitor colors commonly used by well-known foreign brands. While strictly controlling the product quality, its novel and bright shell color can better reflect its uniqueness.

Y capacitors are usually ceramic capacitors. In the past, they were mostly oblate and blue in color. The capacity of Y capacitors was nf level. Of course, with the advancement of the times and the advancement of science and technology, Y safety capacitors are not static. It has a new SMD Y capacitor. This SMD Y capacitor has the advantages of small weight, light weight and high reliability. , which are very suitable for gallium nitride and small household appliances products, and, with the explosion of gallium nitride chargers in the market last year, more and more chargers, power supplies, and small household appliances companies have begun to use this patch Y capacitance. The above is the editor's introduction to the role of safety capacitors and its different forms. We will see you in the next issue.

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How to choose the x2 capacitor? Is 275V enough?

How to choose the X2 capacitor? When we choose an X2 capacitor, we first refer to its rated working voltage. The rated working voltage of the previous X2 safety capacitor is generally 275V, but now more and more high-voltage X2 capacitors appear, then we Is it enough to choose a 275v x2 capacitor these days?

The voltage we need to know refers to the AC voltage, that is, VAC. The voltage in major cities in China is 220V, so  Ac Capacitor theoretically, the X2 safety capacitor with a voltage of 275V is enough to use in China, and the voltage of 220V is still retained. a certain safety margin.

As we all know, X2 capacitors require a lot of safety certifications. The rated voltage required by China's CQC is 310VAC. It is recommended to use X2 safety capacitors with a voltage of 310V when using safety capacitors in China. The rated voltage required by the safety certification is different in different countries and needs to be determined according to the voltage of different countries.