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The main principles of low voltage circuit breaker selection

1) The selection of circuit breakers must meet the basic requirements of the circuit breaker's own load nature and fault categories; 2) The rated voltage value and frequency of the circuit breaker must be compatible with the nominal voltage and nominal frequency of the circuit in which it is located...

Reliability index of miniature circuit breaker

The biggest difference between small circuit breakers and control appliances is that in addition to the reliability of their operating characteristics, people are more concerned about their protective effect on the failure of electrical equipment, that is, they are required to successfully protect t...

It is not a good idea to use a circuit breaker directly in the motor circuit

First, because sometimes the motor is damaged before it is over-current, and sometimes it is not over-current. In this way, the circuit breaker as a circuit protection either does not work or has a certain hysteresis. Sexual characteristics. Secondly, the air breaker selection is generally based on ...

Meaning of parameters on the nameplate of the circuit breaker

Molded case circuit breakers are the most common low voltage electrical components. Molded case circuit breakers can reliably switch on and off the rated current and automatically cut off the current when the current exceeds the trip setting. What do the parameters on the nameplate of the molded cas...

Structure and Operation of LV Circuit Breakers

Whether it is frame type circuit breaker, molded case circuit breaker or miniature circuit breaker, the structure of the circuit breaker body is basically the same, the difference is the size and the shape of parts. Whatever type of circuit breakers, they must have three components in structure. (1)...

How to make a choice between Low Voltage Circuit Breaker and Fuse

First, let's analyze the function of low voltage circuit breaker and fuse in low voltage electrical circuit I. Low Voltage Circuit Breakers It is used for load current protection at the total power supply end, for load current protection at the trunk and branch ends of distribution lines, and for l...

The connection modes of LV circuit breakers

The connection modes of LV circuit breakers are front board, back board, insert board and drawer board. If users have no special requirements, they supply the LV circuit breakers in front of the board. Front board connection is a common connection mode. (1) Post-board wiring mode: The most important...

Working Principle and Internal Structure Diagram of AC Contactor

AC contactor is a kind of electromagnetic AC contactor with open main contacts, three poles and air as arc extinguishing medium. Its components include: coils, short-circuit rings, static iron cores, moving iron cores, moving contacts, static contacts, auxiliary normally open contacts, auxiliary nor...

Working Principle, Function, Model Selection and Notice of Low Voltage Circuit Breaker

Low voltage (LV) circuit breaker is also called automatic air Circuit Breaker or automatic switch. The function of the circuit breaker is that when the circuit has dangerous faults such as short circuit, serious overload and voltage loss, the LV circuit breaker can automatically cut off the fault ci...

Daily maintenance of miniature circuit breakers

In order to make sure the operation of miniature circuit breaker more comfortable, we can not ignore its maintenance, if you often carry out maintenance, then its life will be many times longer, why not? In order to work well, maintenance and maintenance need to be continuously strengthened. So, wha...

Introduction of Auto Reclosing Circuit Breaker

The so-called auto reclosing circuit breaker is an automatic device which automatically puts the circuit breaker into operation according to the need after the breakdown. The use of auto reclosing device in power system greatly improves the reliability of power supply, reduces the loss of power outa...

How to detect and identify fault arc in AFCI (Arc Fault Circuit Breaker)?

Arc fault circuit breakeruses electronic technology to identify arc state. Fault arc detection is the key link of arc fault protection. Research on arc and fault arc detection began in the late 1980s and early 1990s in the United States. Major arc detection and fault identification methods are based...

Working Principle of Low Voltage Circuit Breaker

Low Voltage Circuit Breakers (LVCB), also known as automatic air circuit breaker, can be used to turn on and break load circuits, or to control motors that do not start frequently. It is an important protective device in low-voltage distribution network. Its function is equivalent to the sum of some...

Rules for Safe Use of Circuit Breakers

In hot summer, the role of circuit breakers is particularly prominent, so how to use circuit breakers safely? The following is our summary of the safe operation rules of circuit breakers, hoping to help you. Rules for Safe Use of Circuit breakers 1. After the circuit of miniature circuit breaker is ...

New technology - AFCI (Arc Fault circuit breaker), has changed our choice

Preface: For electrical fire accidents, the phenomenon of "light and heat" eventually appears. "Arc" is the phenomenon of "light" to show "from arc to combustion", such as short circuit, poor contact, leakage, fault arc caused by fire. Therefore, the detection of fault arc belongs to a judgment of t...

The Difference Between Moulded Case Circuit Breaker and Miniature Circuit Breaker

With the development of science and technology, common circuit breakers are moulded case circuit breakers (MCCB) andminiature circuit breakers (MCB). The differences between them are as follows. The main function of moulded case circuit breaker is to provide protection function for overload and sho...

Working Principle of Auto Reclosing Circuit Breaker

Auto reclosing circuit breaker is widely used in overhead line transmission and overhead line power supply lines on the effective anti-accident measures (cable transmission, power supply can not be used). That is, when the line fails, after the circuit breaker is tripped by relay protection, the au...

After-sale Precautions for Auto Reclosing Circuit Breaker

After-sale Precautions for Auto Reclosing Circuit Breaker: Under the normal installation and use conditions of the products, the users will replace the products free of charge for 3 years from the shipment of the original factory, when the products are damaged or unable to work properly due to quali...

Instructions of Auto Reclosing Circuit Breaker

As a new type of electrical protector, auto reclosing circuit breaker has been widely used in power supply industry. For example, some railway, airport, traffic lights and other automatic power supply have gradually begun to use auto reclosing circuit breaker. Auto reclosing circuit breaker can be w...

Introduction of Plastic Meter Box

Plastic meter box includes two parts: single-phase meter box and three-phase meter box. It is suitable for the measurement and control management of single-phase electric energy and power electric energy in power supply system with AC 50Hz or 60Hz, rated working voltage 220V, 380V, 690V and rated wo...

Application of Circuit Breaker in Low Voltage Distribution Box

Application of Circuit Breaker in Low Voltage Distribution Box Circuit breaker is one of the most important distribution appliances in low voltage distribution box/cabinet. Because of the different places and conditions used, low voltage circuit breaker are divided into four categories: distributio...

Difference between LV Circuit Breaker and Voltage Protector

What is over/under voltage? Instability of power supply in power grid, bad outdoor environment, aging of household lines, start-up and shutdown of high-power electrical appliances, etc. lead to short-term or long-term voltage instability What's the damage of over/under voltage? When the circuit is i...

Advantages of Automatic Reclosing Power Protector

Automatic reclosing power protector, which greatly reduces the possibility of leakage, but also better protect the aging of circuit lines and other issues. Today, automatic reclosing power protector manufacturer TAIXI Electric tells you about the advantages of automatic reclosing power protector. 1....

Mission of Arc Fault Circuit Breaker (AFCI)

The prevention and cure of electric fire which is the most harmful to fire is very important, and more attention is paid to preventing fire from burning. Arc Fault Circuit Breaker (AFCI), an arc protection switchgear that initially prevents the occurrence of electrical fires, emerges as required. ...

The Principle of How to Select China Circuit Breakers

China Circuit Breaker is a kind of equipment to control current interruption. It is mainly used to protect the circuit and equipment. If there are overload, short circuit, undervoltage and other faults in the circuit, the circuit breaker can quickly cut off the power supply to protect the safety o...

Measures of Air Circuit Breaker after Breaking Short Circuit Current Every time the short circuit current is disconnected, the Air Circuit Breaker should be inspected. The contents of the inspection and the methods of fault treatment are as follows. 1. Contact system (1) Smoke marks on main and ar...

Characteristics of Air Circuit Breaker

Air circuit breaker, also known as frame circuit breaker, is a mechanical switching device that can switch on, load and break the current under normal circuit conditions, and can also switch on and load a certain time and break current under specified abnormal circuit conditions. At present, in our...

How to Select Miniature Circuit Breakers

Nowadays, home is inseparable from electricity, and electricity is a dangerous thing, if you are not careful, you will have a safety accident. Therefore, when we use electricity, we will install household circuit breaker. What role does it play? First, control function, it will control the current i...

Brief Introduction of Miniature Circuit Breaker

In the past, all fuses need to be replaced by small circuit breakers in order to achieve better safety and control. Unlike fuses, miniature circuit breakers operate as automatic switches and turn on the circuit when there is too much current. Once the circuit returns to normal, it can be closed agai...

Development of AC Contactors

AC contactor is one of the indispensable equipment in AC current. In recent years, a variety of contactors have been produced continuously. Din Rail Mounted Contactor are developing towards diversification, bringing people more and different choices. As a whole, the shape and performance of AC cont...

Working Principle of Low Voltage Circuit Breaker

Low-voltage circuit breakers, also known as automatic air switches, can be used to turn on and break load circuits, or to control motors that do not start frequently. It is an important protective device in low-voltage distribution network. Its function is equivalent to the sum of some or all functi...

What are the common faults of Auto Reclosing Circuit Breaker?

What are the common faults of Auto Reclosing Circuit Breaker? In the use of automatic reclosure, if there is a fault, it will lead to automatic reclosure can not play 1. Avoid the construction quality of the failure caused by substandard. In new construction and technological renovation projects, wi...

How to Select Contactors

Contactors are mainly composed of electromagnets and contacts. Household Contactor with larger capacity also have arc extinguishing devices. When the coil is not electrified, the disconnected contact is called the constant open contact, and the closed contact is called the constant closed contact. W...

Characteristics of DC Circuit Breakers

In recent years, the products of DC mini circuit breaker in China have developed rapidly. By designing new products and introducing technology from famous foreign manufacturers, the product varieties and quality have been improved significantly, and the products that meet the new international stand...

What are the main points of routine maintenance of circuit breakers

In order to make the circuit breaker operate more smoothly, we should not neglect its maintenance. If you maintain it regularly, household circuit breaker's life will be many times longer. Why not? In order to work well, maintenance need to be continuously strengthened. So, what are the main points ...

What is the function of the meter box in family life?

In our family life, we cannot live without electricity, because electrification is very common in family life, and there are many electrical equipment in our family, so point for our family life can be said to be very important. In the process of using electricity, it is impossible for families to u...

How to choose the circuit breaker for motor protection?

When choosing a circuit breaker to protect the motor, we should pay attention to two characteristics of the motor. One is that it has a certain overload capacity. The other is that its starting current is usually several to ten times the rated current. Therefore, circuit breakers for motor protectio...

Importance of using Auto Reclosing Circuit Breaker

After the Auto Reclosing Circuit Breaker is switched off for some fault reason, it is automatically reclosed by mechanical device or relay automatic device. If the fault of power system is temporary, after the LV circuit breaker is tripped and cut off by relay protection device, it will automaticall...

What is the intelligent air circuit breaker?

What is the intelligent air circuit breaker? Many people may not understand what it is. First, I will briefly introduce its origin. It is an intelligent low-voltage circuit breaker with intelligent control system installed on it, which can monitor, troubleshoot, locate and alarm the electric circuit...

Principle of Overvoltage and Undervoltage Protector

Why do we use under-voltage protectors in our daily life? What are the advantages of using over-voltage protectors? Today, I want to share with you the function of voltage protection devices. All electrical appliances in use should avoid too high or too low grid voltage. Both industrial equipment a...

What are the requirements of Auto Reclosing Circuit Breaker in use?

Everyone knows that the quality of materials directly affects the life of Auto Reclosing Circuit Breaker, but in fact, the details in the use process are also very important. What are the requirements when using Auto Reclosing Circuit Breaker? 1. When the leakage current is used as a reclosing circ...

Background of Arc Fault Circuit Breaker

Arc Fault Circuit Breaker technology is a new circuit protection technology. Its main function is to prevent fire caused by fault arc. When arc fault occurs, because the current intensity is small, which is lower than the setting value of over-current protection widely installed in power system, esp...

What are the main uses of household AC contactors?

Contactor is an automatic control device. Contactors are mainly used for frequently switching on or disconnecting AC and DC circuits. They have large control capacity and can be operated over long distances. They can achieve timing operation, interlocking control, various quantitative control and vo...

Why does the plastic meter box need insulation resistance?

Meter boxes are widely used in various fields of the national economy. They are important support for the industry, national defense construction and major project construction. They are the important basic industries of the national economy and the necessities of people's daily life. Electric meter...

Working Principle of Low Voltage Circuit Breaker

Low-voltage circuit breakers are mostly used for frequent switching and starting motors, to protect electrical appliances and motors. When they have serious overload and short circuit. When under-voltage and other faults occur, the circuit can be automatically cut off. Therefore, LV circuit breaker ...

What are contactors and what are their characteristics?

Household Contactor refer to electrical appliances in industry that use coil current to generate magnetic field to close the contacts so as to control the load. Contactors have the advantages of high operating frequency, long service life, reliable operation, stable performance, low cost and simple...

The Concept of Low Voltage Circuit Breaker

1. The Concept of Low Voltage Circuit Breaker Low-voltage circuit breaker is also known as automatic air switch or automatic air circuit breaker, referred to as circuit breaker. It is not only a manual switch, but also can automatically protect against voltage loss, undervoltage, overload and short...

Maintenance of AC Contactors

Maintenance of AC contactors is generally divided into operation inspection and stop maintenance. I. In the operation of equipment, AC Household Contactor need to be inspected as follows: 1. Whether the load current passed is within the rated current range of the AC contactor; 2. Whether the divid...

How to choose voltage protection devices?

The use of voltage protection devices greatly reduces the harm of over-voltage or under-voltage to circuit and electric load. It is equivalent to a small intellectualized switching protection device, which is mainly used in the circuit with current and voltage less than 63A. It is an important prote...

The working principle of ACB circuit breaker

ACB circuit breaker is a kind of switching device which can turn on, load and break the current in normal circuit and can turn on, load and break the current in abnormal circuit within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers ...

Working principle of automatic reclosing switch

Auto Reclosing Circuit Breaker is widely used in overhead line transmission and overhead line power supply lines on the effective anti-accident measures (cable transmission, power supply can not be used). That is, when the line fails, after the circuit breaker is tripped by relay protection, the au...

Working principle of Auto Reclosing Circuit Breaker

Auto Reclosing Circuit Breaker is widely used in overhead line transmission and overhead line power supply lines on the effective anti-accident measures (cable transmission, power supply can not be used). That is, when the line fails, after the circuit breaker is tripped by relay protection, the au...

What are the characteristics of PV Auto Reclosing?

The Auto Reclosing Circuit Breaker is an automatic device which automatically puts in the circuit breaker after the break-off due to the fault. The operation experience of power system shows that most of the faults of overhead lines are transient permanent faults, generally less than 10%. Therefore,...

How much do you know about contactors?

From the point of view of usage, Household Contactor can be divided into: 1. Industrial contactors are mostly general models. The common models are CJX2 series, CJ20 series and CJT1 Series in CJ series. 2. Architectural and household contactors, ABBESB series, Hummer HBC1 series, CHINT NCH8 series,...

Function and application of internal accessories for air circuit breakers

At present, in our market, air circuit breakers are mainly divided into DW15, DW16, DW17 (ME), DW45 and other series, the products are composed of ontology and accessories. ACB circuit breaker itself does not have any accessories, but it can effectively divide and close the circuit, automatically cu...

Product features of PC transparent plastic meter box :

Product features of PC transparent plastic meter box: 1. The product is made of transparent polycarbonate (PC) and ABS engineering plastics. It has the functions of power security protection, user separation control, data acquisition, etc. Electric meter box can maximize the reliability of electric...

How harmonic protection works

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Common fault analysis of AC contactors

1. Coil fault There are many reasons for coil burnout, such as high power supply voltage, over 110% of the rated voltage may burn the coil. On the other hand, the power supply voltage is too low, below 85% of the rated value may also burn the contactor coil, which is due to the contactor armature c...

What is the difference between C-type and D-type of miniature circuit breakers?

Let's analyze the type of tripping curve. 1. A-type tripping curve: magnetic tripping current is (2-3) In, suitable for protection of semiconductor electronic circuits, with small power supply transformer measuring circuit or line length and low current system. 2. B-type tripping curve: magnetic tr...

Application of low voltage circuit breaker in power supply system

Circuit breaker is a kind of switching device which can close, load and break the current under the condition of normal circuit and can close, load and break the current under the condition of abnormal circuit in the prescribed time. Household circuit breaker are divided into high-voltage circuit br...

Understanding the meter box

The material used for making the low voltage cable branch box is a resin matrix composite material. The main components of the box are ABS engineering plastics, polycarbonate transparent PC materials, DMC, SMC four materials injection molding, pressing. There is a distribution board in the plastic ...

Malfunction and solution of air circuit breaker

Air circuit breakers are often referred to as frame breakers because they are wrapped in a frame, which is still common. When the main contact is not closed or closed, the air circuit breaker will cause some unnecessary harm. There are several possible reasons for this study: (1) Due to the high cu...

Function and working principle of circuit breaker

Circuit breaker is a switching device which can close, load and break the current under normal circuit conditions, and can carry and break the current under abnormal circuit conditions (including short circuit conditions) within a specified time. China Circuit Breaker can be used to distribute elect...

Site layout and installation instructions for electric meter box

The electric meter box is usually mounted on a mounting plate, the installation board is called kilowatt hour meter, or the meter board. When the meters are installed side by side, the center distance should not be less than 200mm. The meter box should be installed near the incoming line. The instal...

Structure, principle and application of contactor

Contactors are certainly familiar to power workers. It is no exaggeration to say that contactors are the most frequently used electrical components in power operation so far. Contactors are not only the electronic control cabinets, but also the effective components of distribution cabinets. They pla...

What are the main measures to improve the life of contactors?

Household Contactors are divided into AC contactors (voltage AC) and DC contactors (voltage DC), which are used in electric power, distribution and power applications. Contactors in a broad sense refer to the use of coil current in industrial electricity to generate magnetic field, so that the conta...

How does the air circuit breaker work?

Introduction of air circuit breaker Air circuit breaker, also known as frame circuit breaker, is a kind of mechanical switching apparatus which can turn on, load and break the current under the condition of normal circuit, and can also turn on, load and break the current under the condition of speci...

What is the circuit breaker and what is its working principle?

Circuit breaker is a switching device which can close, load and break the current under the condition of normal circuit, and can close, load and break the current under the condition of abnormal circuit within a specified time. Household circuit breaker is generally made up of contact system, arc ex...

Common sense of electric meter box

Electric meter box is a kind of power distribution unit that can be directly fixed on the wall or installed on the wire pole, can install any specification of electronic meter, mechanical meter, leakage protector, junction box, leakage switch DZ47 or RCL fuse and isolating switch, the knife-gate met...

Function and requirement of Automatic Reclosing

The Auto Reclosing Circuit Breaker is an automatic device that automatically switches the circuit breaker on demand. The operation experience of power system shows that most of the faults of overhead lines are transient, and the permanent faults are less than 10%. Therefore, after the short-circuit ...

Routine maintenance of circuit breakers

In order to make the circuit breaker operate more freely, we should not neglect its maintenance. If you maintain it frequently, its life will be many times longer. Why not? For its good working condition, maintenance and maintenance of China circuit Breaker need to be constantly strengthened. Then, ...

Working process of voltage protector

We know that overvoltage and undervoltage protection devices are an important voltage protection devices. It is often installed on the power supply entrance of distribution box. Its main function is to protect the circuit or load when the circuit is over-voltage or under-voltage. Its working princip...

Working principle of air circuit breaker

Air circuit breaker, also known as frame circuit breaker, is a kind of mechanical switching apparatus which can turn on, load and break the current under the condition of normal circuit, and can also turn on, load and break the current under the condition of specified abnormal circuit. Air circuit b...

On miniature circuit breaker

The working principle of miniature circuit breaker is arc extinguishing principle. Circuit breaker is generally composed of contact system, arc extinguishing system, operating mechanism, tripper, shell, etc. The function of miniature circuit breaker is to cut off and connect the load circuit, and cu...

Application status of voltage protector

At present, domestic overvoltage and undervoltage protection devices are mainly in the following forms. 1. Voltage protector for single electrical appliance. The main protectors of the tired protector are air conditioners and fridges. It can automatically protect when the voltage is too low, too hi...

Difference between voltage protectors and leakage circuit breakers

When you decorate your home, have you only noticed the wiring, switch, buried pipe, slotting and other processes? Have you ever noticed the distribution box? Of course, they are equipped with the equipment when you take the house, but what are the uses of these equipment? Do you need to increase or ...

Plastic meter box used in daily life

At present, the use of plastic meter box is actually a lot of households use this way, perhaps not often in life to pay attention to the situation, so sometimes it is still a little strange, now about the use of electric meter box is mainly combined with the actual use of two parts, respectively app...

What is the DC circuit breaker?

DC circuit breakers are mainly used for overload and short-circuit protection of DC electrical circuits and equipment, and also belong to the controller of DC electrical circuits. Just like the tap used in our daily life, the tap controls the flow of water, while the DC mini circuit breaker controls...

Definition and use of air circuit breakers

Air circuit breaker is a kind of protective device suitable for distribution network with 50/60Hz AC, rated voltage 400V, rated working current up to 1000A and below. It is used to distribute electric energy and protect line and power equipment from overload, undervoltage, short circuit, single-phas...

What are the main measures to improve the life of contactors?

Contactor is an important component of low-voltage electrical apparatus. Its life is one of the quality evaluation and main indexes. So it is very important to take some measures to improve its life. Reasonable matching of suction characteristics and reaction characteristics can improve the life of...

Function and working principle of circuit breaker

Circuit breaker is a switching device which can close, load and break the current under normal circuit conditions, and can carry and break the current under abnormal circuit conditions (including short circuit conditions) within a specified time. LV circuit breaker can be used to distribute electric...

Common failures and troubleshooting methods of low voltage circuit breakers

Low voltage circuit breakers, formerly known as air circuit breakers. It is mainly used in circuit overload, short circuit and under-voltage and otherr abnormal circumstances such as automatic break off the circuit, cut off the power supply. Common failures of lv circuit breaker are unable to close....

Simple analysis of Arc Fault Circuit Interrupter (AFCI)

It is very important to prevent electric fire which occupies the first place in fire hazard. Arc Fault Circuit Interrupter (AFCI), an arc protection switchgear, was developed to prevent electric fire. Electrical fires are mainly caused by: (1) series arc or parallel arc short circuit caused by poor...

Basic requirements and principles of circuit breaker selection

The main role of circuit breakers is to protect electrical appliances and isolate line load, in general, to meet the following basic requirements: 1) The selection of household circuit breaker to meet the line load characteristics. When choosing a circuit breaker, first of all, it is necessary to ...

Summary of DC circuit breaker

DC circuit breaker, also known as DC air switch or DC mcb, is the most common component of low-voltage circuit breaker. Mainly used for circuits of rated voltage 250V ~ 1000V, rated working current to 1 ~ 60A DC, as the DC line overload, short circuit protection and line frequent conversion. The cir...

The composition and working principle of ac contactor

Contactor is mainly composed of electromagnetic system, contact system and arc extinguishing device. It is a kind of low-voltage control device widely used in automatic control system and electric drive system. Household Contactor can be divided into two types: AC contactor and DC contactor. 1. AC ...

The function of overvoltage and undervoltage protection devices

The main function of the overvoltage and undervoltage protection devices is to break the short-circuit current. When the short-circuit fault occurs, the circuit breaker will trip the protection equipment. The function of under voltage protector is to trip when the system voltage is below the set val...

Matters needing attention in selection of DC circuit breaker

DC circuit breakers are personal safety precautions in low voltage electrical appliances and low voltage switchgear control equipment. The significance of indirect contact protection of dc mcb live components is to prevent the occurrence of excessive contact voltage on the housing of terminal elect...

How to choose the circuit breaker for motor protection?

When choosing a circuit breaker to protect the motor, we should pay attention to two characteristics of the motor. One is that it has a certain overload capacity. The other is that its starting current is usually several to ten times the rated current. Therefore, circuit breakers for motor protectio...

The function of AC contactor

AC contactor is used to control the circuit, mainly breaking circuit and remote control circuit. Household Contactor mainly uses auxiliary contacts to achieve control instructions and achieve the purpose of remote control circuit. The main contacts of AC contactors are usually open contacts, the mai...

Working principle of air circuit breaker

Air circuit breaker is also called frame circuit breaker. It can turn on, load and break the current under normal circuit conditions. It can also turn on, load a certain time and break the current under the specified abnormal circuit conditions. The operation of air circuit breaker depends on manua...

What is the difference between C-type and D-type of miniature circuit breakers? How to choose them?

Miniature circuit breakers used for motor startup should be type D, type C for distribution control and lighting, type D for short-circuit segment multiple larger than type C, such as rated 32A switch, D short-circuit segment capacity is about 7-10 times rated, C is about 4-7 times. Small size, eas...

The difference of several circuit breakers in the household distribution box

In fact, not only the home distribution box, all the single-phase circuit, there are only these kinds of switches. By the way, it is not actually called a switch, the scientific name is called "circuit breaker" or "air switch", more professional name, called "miniature circuit breaker", short for "M...

Matters needing attention in installation and use of photovoltaic DC miniature circuit breakers

PV DC mini circuit breaker as the use of photovoltaic distribution, the role of DC mini circuit breaker is also particularly prominent, then how can the use of DC circuit breakers in peacetime in the safe use? 1. When the circuit of DC mini circuit breaker is connected, check whether the wiring is ...

Structural characteristics of DC mini circuit breaker

The over current protection of the DC rectifier circuit generally considers the protection scheme of the fuse or circuit breaker on the AC side. The rated current, rated voltage and breaking capacity of the AC circuit breaker can be selected according to the rectifier circuit, load and working curre...

How do Arc Fault Circuit Breaker detect and identify fault arcs?

Arc Fault Circuit Breaker uses electronic technology to identify arc state, and fault arc detection is the key link of arc fault protection of Arc Fault Circuit Breaker. The study on arc and fault arc detection began in the late 1980s and early 90s in the United States. By means of light, heat, soun...

How to choose a voltage protector?

The use of voltage protector greatly reduces the harm caused by overvoltage or undervoltage to the circuit and power load. It is equivalent to a small intelligent switching protection device, which is mainly used in circuits with current and voltage less than 63A. It is an important protection devic...

What is the AC contactor?

AC contactor is an intermediate control element. Its advantage is that it can connect and break the circuit frequently, and control the high current with small current. Working with thermal relay can also play a role of overload protection for load equipment. Because it is through the electromagneti...

Future development trend of smart grid

"Internet +" has become a hot word for the innovation and development of the traditional industry. Using Internet thinking and technology to achieve innovative development of traditional industries is also a distinctive feature of the future smart grid construction. The development model of the inte...

Advantage introduction of frequency conversion EPS emergency power supply

EPS emergency power supply as a backup emergency power supply, in the fire emergency use of many, with the continuous development of skills, as well as various fire emergency, industrial use, lighting and other needs are not the same, EPS emergency power supply of all kinds of equipment is also beco...