elcb circuit breakers manufacture- Suppliers Factory Manufacturers From China

At the regular press conference held by the Ministry of Commerce on September 10, the spokesperson Gao Feng introduced that the 128th China Import and Export Fair  (Canton Fair for short) will be held online from October 15th to 24th and will last for 10 days. Gao Feng said that continuing to hold the Canton Fair online will help further play the role of the Canton Fair's all-round opening up platform, promote the stable and healthy development of foreign trade under normal epidemic prevention and control, and facilitate the smooth flow of the foreign trade industry chain and supply chain. We will work hard to provide better and more convenient services for exhibitors and merchants. Welcome Chinese and foreign enterprises and businessmen to actively participate in the exhibition and negotiate purchases.

The miniature circuit breaker is also a circuit breaker product with a wide selection and quantity, and its main function is to protect the electrical junction distributor device of the building. It is suitable for overload and short circuit protection of AC 50/60 Hz, rated voltage 230/400 V, rated current up to 63 A, and also can be used for the rare operation and conversion of lines under normal conditions, mainly for industry, commerce, high rise and residential buildings and other places.

How does the miniature circuit breaker work?

The miniature circuit breakers consist of drives, contacts, protective devices (various triggers) and arc extinguishing systems. Its main contacts are manually operated or electrically closed. After closing the main contact, the release mechanism locks the main contact in the closed position. The coil of the overcurrent trigger and the thermocouple of the thermal trigger are connected in series with the main circuit, and the coil of the undervoltage trigger is connected in parallel with the power supply. In case of short circuit or strong overload of the circuit, the anchor of the overcurrent trigger is tightened to release the free trigger, and the main contact disconnects the main circuit. When the circuit is overloaded, the thermocouple of the thermal trigger heats up and bends the bimetal, thereby activating the free release mechanism. In case of undervoltage in the circuit, the anchor of the undervoltage trigger falls off.

What are the installation requirements for the miniature circuit breaker?

1) The installation of the miniature circuit breaker should meet the requirements of GB13955-92 standard and product manual.

2) When installing the miniature circuit breaker, the power supply line, power supply mode, power supply voltage, and grounding type of the system should be fully considered.

3) The rated voltage, rated current, short-circuit shutdown capacity and shut-off time of the miniature circuit breaker shall meet the requirements of the protected power supply line and electrical equipment.

4) The installation and wiring of the miniature circuit breaker should be correct. Special attention should be paid to the wiring of the residual current miniature circuit breaker in single-phase, three-phase three-wire and three-phase four-wire power supply systems of different grid grounding forms.

What accessories are added to the miniature circuit breaker?

The miniature circuit breaker also adds some auxiliary measures to improve arc extinguishing performance:

(1) The arc extinguishing chamber is formed into a polygon;

(2) coating a layer of conductive carbon film on the inner wall of the arc extinguishing chamber;

(3) use graphite as an arc extinguishing agent;

(4) Increase the number of auxiliary contacts, etc.

JIELI Electrical is not only a production service provider solving supply chain problems, but also a manufacturer offering OEM and ODM production services. Do you need help with low voltage miniature circuit breakers? Fill out this form to contact us. JIELI Electrical has been active in the low voltage miniature circuit breaker industry for almost twenty years.

The main components of the low voltage circuit breaker are: contacts, triggers, electrical actuators, energy release electromagnets, rotatable actuation handles, extended handles, handle locks, etc.

Which common low voltage circuit breakers do you know?

How to choose a suitable low voltage circuit breaker?

Why do we need to understand low voltage circuit breakers?

Which common low voltage circuit breakers do you know?

1) Current limit switch

A circuit breaker whose shutdown time is short enough to interrupt before the short-circuit current reaches its expected peak value.

2) Plug-in circuit breaker

A circuit breaker equipped with a plug contact (or contact seat) on the terminal to insert the corresponding static contact seat (or contact) and connect it to the external wire.

3) Circuit breakers for removal

It's some kind of pluggable circuit breaker. There is a special circuit breaker support mechanism during plug-in, which can support the circuit breaker even when the inserted contacts are in the separate position, ensuring a safe isolation distance. Drawer circuit breakers should generally have three positions: connect, test and disconnect.

4) Circuit breaker with fuse

A single electrical device consisting of a circuit breaker and a fuse, each phase being formed in series by a fuse and a pole of the circuit breaker.

5) With self-retaining circuit breaker against switching on

A circuit breaker in which the movable contacts do not conduct current, even if a command to close is given, if the conditions that caused the opening process persist.

6) Open circuit breaker

A circuit breaker that opens and closes in the open air

How to choose a suitable low voltage circuit breaker?

There are also many models of low voltage circuit breakers on the market. For example, there are dz47, which are small circuit breakers, and z20, including dw15 and so on. Different models have different applications.

When choosing, we should decide according to the current load capacity in the circuit, which type of circuit breaker to choose. You must not choose the wrong one, otherwise the circuit breaker will not play a protective role, but it will pose certain safety risks to our power consumption.

Why do we need to understand low voltage circuit breakers?

When it comes to the technical parameters of low voltage circuit breakers, most electrical professionals need to be very clear, but when it comes to the importance of the parameters of low voltage circuit breakers, many electrical professionals can be confused. low voltage circuit breakers are an important component of low voltage electrical products in the energy industry. With the further improvement of the degree of automation, the performance and service life requirements of circuit breakers are getting higher and higher, and the reliability of circuit breakers is mainly determined by their actuation mechanism. Reliability. Therefore, it is of great importance and practical value to investigate the reliability and optimal design technology of the low voltage circuit breaker drive.

JIELI Electrical has been active in the low voltage circuit breaker industry for almost twenty years. JIELI Electrical Engaged in research and development, production and supply chain management of MCB, RCCB and related supporting products.

low voltage circuit breakers are also called automatic air switches or automatic air circuit breakers or short circuit breakers. It is an electrical device that has both manual switching functions and automatic power failure, undervoltage, overload and short circuit protection.

• What role do low voltage circuit breakers play?

• How does a low voltage circuit breaker work?

• What are the components and working methods of low voltage circuit breakers?

What role do low voltage circuit breakers play?

1.low voltage circuit breakers are mainly used in low voltage circuits to protect electrical equipment from short circuits, or if the voltage is abnormal or the current is too high, the circuit breaker can avoid some dangerous accidents.

2.The low voltage circuit breaker is very suitable for machine tools as it can take on a variety of protective functions. When the machine tool equipment is working, the low voltage circuit breaker is installed, so it does not need to be started frequently to avoid damage to the associated equipment.

3.There is an alarm contact in the low voltage circuit breaker. When the circuit is overloaded or a short circuit occurs, the alarm contact emits a sound, or a indicator light lights up to remind people in time to avoid major accidents.

How does a low voltage circuit breaker work?

The low voltage circuit breaker has great advantages over the knife switch when entering the house. First, it can interrupt a large current and has an arc extinguishing device, which is suitable for increasing the load of the house circuit. In addition, its thermal stability and service life are better than that of the knife switch. The second is that it can automatically interrupt the circuit if an error occurs. There are two triggers in the circuit breaker, one is a thermal bimetal trigger, which is used for overload delay protection; the other is an electromagnetic trigger used for immediate short circuit protection.

After using the circuit breaker, the fuse is no longer installed in the house circuit. When an error occurs, the trigger automatically triggers (commonly known as triggering) to interrupt the circuit. When the error is fixed, it can be reused simply by resealing without replacing parts.

What are the components and working methods of low voltage circuit breakers?

The low voltage circuit breaker consists of three basic components: contact and arc extinguishing system, trigger, transmission and actuation mechanism. The contacts shown in the drawings are closed, and the latch locks this closed state with a hook to stabilize it. In case of overload, the overload trigger responds and the small multiple overload current bends the bimetal slightly after a certain time. The contacts are separated for overload time delay protection. When a short circuit occurs, the short circuit trigger acts, and the multiple short circuit current quickly attracts the anchor by the magnetic force generated by the electromagnet to move it downwards. stable, the contacts are quickly disconnected to achieve immediate short-circuit protection.

JIELI Electrical Engaged in research and development, production and supply chain management of MCB, RCCB and related supporting products.

The miniature circuit breaker is mainly used for home use and generally only has short-circuit and overload protection. However, it is small in size, low in price, and easy to maintain. It is generally used at home. The maximum cutting capacity does not exceed 10KA.

What is the difference between MCB and RCB?

MCB is a miniature circuit breaker, while RCB is a circuit breaker with residual current protection. Different loads should use different types of circuit breakers.

An MCB or miniature circuit breaker is an electromagnetic device that embodies a complete enclosure in a molded insulating material. The main function of the MCB is to switch the circuit, i.e. automatically turn on the circuit (already connected to it) when the current through it (MCB) exceeds the value it is set to. It can be turned on and off manually like a normal switch if needed.

What is the connection between Type C and Type D MCBs?

1. The functions are different.

If it is a C40 type circuit breaker, it is generally suitable for use in home power distribution and lighting circuits, such as for controlling power distribution or lighting connections. If it is a D63 type circuit breaker, it is used to control industrial motors.

2. Different segmentation capabilities.

If it is a C40 type circuit breaker, its sectional capacity is about 4 to 7 times, while the sectional capacity of a D-type circuit breaker is slightly higher, which can reach between 7 times and 10 times.

3. The tripping current is different.

The tripping current of the C40 type circuit breaker is 5-10 times the rated current, and the tripping current of the D63 type circuit breaker is 10-14 times the rated current.

What is the future development trend of miniature circuit breakers?

Traditional AC miniature circuit breakers are mainly used as short-circuit or over-current protection appliances in power systems with AC 50hz and above. Due to the increasing requirements for power grid security and the rapid development of computer technology in recent years, people have begun to study new intelligent low-voltage switchgear to replace traditional low-voltage circuit breaker products. Among them, intelligent high-voltage vacuum load switch is characterized by its unique function which has been widely used.

With the continuous improvement of industrial automation and the increasing emphasis on environmental protection, people have put forward higher requirements for the reliability and service life of electrical equipment. Therefore, there are many new intelligent components such as miniature circuit breakers and leakage protectors in the intelligent low-voltage power distribution cabinets currently on the market.

JIELI Electrical has three production bases around the world, namely in Poyang, Jiangxi, China, Yueqing, Zhejiang, China, and Yangon, Myanmar. The production base has passed the international ISO9000 quality system certification. Zhejiang's production base is still a local patent demonstration enterprise and high-tech enterprise. Possess an annual production capacity of 20 million PCS for MCB and 1 million PCS for RCCB. The customers served are in nearly 50 countries around the world.

At the regular press conference held by the Ministry of Commerce on September 10, the spokesperson Gao Feng introduced that the 128th China Import and Export Fair  (Canton Fair for short) will be held online from October 15th to 24th and will last for 10 days. Gao Feng said that continuing to hold the Canton Fair online will help further play the role of the Canton Fair's all-round opening up platform, promote the stable and healthy development of foreign trade under normal epidemic prevention and control, and facilitate the smooth flow of the foreign trade industry chain and supply chain. We will work hard to provide better and more convenient services for exhibitors and merchants. Welcome Chinese and foreign enterprises and businessmen to actively participate in the exhibition and negotiate purchases.

The miniature circuit breaker is the most widely used terminal protection device in the construction of electrical terminals for power distribution. It is used for single-phase and three-phase short circuit, overload and overvoltage protection under 125 A, including single-pole 1P, two-pole 2P, three-pole 3P and four-pole 4P.

What are the characteristics of miniature circuit breakers?

The typical size of the miniature circuit breaker is 18 mm width as module (1 bit, 1 P) and 9 mm as module. Friends should pay attention to their statement when buying to prevent the sizing of the distribution box top. Mistakes. In fact, 9 and 18 can be converted if we use it. Micro-Break has two frame currents 63A and 125A. The 1st position of the microfracture below 63 A is 18 mm, and the 1st position of the 125-frame current is 27 mm.

When a miniature circuit breaker in the distribution box needs to be replaced, it is accidentally jammed in the middle. We can only remove the wire and pull the clip on the bottom of the miniature circuit breaker to separate it from the guide rail. The clip is uncomfortable to pull by hand. Without a slotted screwdriver, it is not easy to lever.

What is a miniature circuit breaker and what is the difference between a compact circuit breaker and miniature circuit breaker?

Compact circuit breakers have a current carrying capacity of up to 2000 A. The maximum rated current of miniature circuit breakers is within 125 A.

Due to the capacity difference between the two, in the specific work, the effective area of the Compact circuit breaker is also larger than that of the miniature circuit breaker, and the wires connected to it are also relatively thick, which can reach more than 35 square meters, while the miniature circuit breaker is only suitable for connecting 10-wire below the square. Therefore, in general, for indoor conditions, it is better to choose compact circuit breakers for larger rooms.

How to choose the right miniature circuit breaker?

When selecting a miniature circuit breaker, the following conditions should be considered:

1) The rated voltage of the miniature circuit breaker should not be less than the rated voltage of the line;

2) The rated current of the miniature circuit breaker and the rated current of the overcurrent trigger are not less than the calculated current of the line;

3) The rated short-circuit switching capacity of the miniature circuit breaker is not less than the maximum short-circuit current in the line;

4) The selection of miniature circuit breakers for power distribution shall take into account the short-term delayed short-circuit on-off capability and the coordination between the delay protection levels;

5) The rated voltage of the miniature circuit breaker's undervoltage trigger is equal to the rated voltage of the line.

JIELI Electrical has been active in the low voltage miniature circuit breaker industry for almost twenty years. Dedicated to research and development, production and supply chain management of MCB, RCCB and related supporting products. It is not only a production service provider solving supply chain problems, but also a manufacturer offering OEM and ODM production services.

There are many classification methods for low voltage circuit breakers. Depending on the type of use, a distinction is made between selective and non-selective species. Depending on the arc extinguishing medium, there are air type and vacuum type. low voltage circuit breakers have a wide range of capacities with a minimum of 4 A and a maximum of 5000 A.

• What is the function of the low voltage circuit breaker?

• What are the operating steps of a low voltage circuit breaker?

• How does the overload protection of the low voltage circuit breaker work?

What is the function of the low voltage circuit breaker?

A low voltage circuit breaker, commonly known as automatic air switch, is a low voltage electrical device that can automatically interrupt a faulty circuit and has both control and protection functions. In low voltage circuits, it is used to interrupt and connect load circuits to control the operation and stopping of motors. If the circuit is overloaded, short-circuited, voltage loss and other faults, it can automatically turn off the faulty circuit to protect the safety of the circuit and electrical equipment. Its protective effect parameters can 

be artificially adapted to the requirements of electrical equipment, and it is convenient and reliable to use. It is worth noting that after disconnecting the contact of the low voltage circuit breaker, the actuation handle is still in the "closed" position, and the handle must be moved to the "open" position, and then to the "closed" position. Position.

What are the operating steps of a low voltage circuit breaker?

The operation of the low voltage universal circuit breaker is divided into electrical and manual operation.

Electric operation, first press energy storage button, after inserting the energy storage press close button. If there is no stored energy, press the close button directly. Manual operation, use the special control handle on the universal circuit breaker to manually store the energy up and down on the universal circuit breaker, and press the power button on the circuit breaker after the indicator is attached.

How does the overload protection of the low voltage circuit breaker work?

The low voltage circuit breaker uses time delay protection for long-term overload protection. When a thermally actuated (bimetal element) is used for long-term overload protection, its action source is i2r, and the effective value of AC is equal to the average value of DC, so no change is required. However, if the secondary current heating of the current transformer is adopted for high current specifications, the transformer cannot be used in the DC circuit and cannot be used.

If the long-delay overload trigger of low voltage circuit breaker is completely electromagnetic (hydraulic type, namely oil cup type), the time delay trigger characteristics should change, and the minimum operating current should be increased by 110% to 140% . Therefore, the fully electromagnetic AC trigger unit cannot be used in the DC circuit (if used, it must be redesigned).

JIELI Electrical has the production base that has passed the international certification of ISO9000 quality system. Zhejiang's production base is still a local patent demonstration enterprise and high-tech enterprise.

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