hkel electric appliances (shanghai) co., ltd.

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Classification of Molded Case Circuit Breakers and Related Parameters

At present, Hangkai Electric Appliances (Shanghai) Co., Ltd. produces three types of plastic shell vacuum circuit breakers: distribution type, motor protection type, household and similar places.

knowledge introduction of small molded case circuit breaker

小型断路器由固定和移动的交流接触器组成,交流接触器与传输线相连.金属材料或载流部件由电解铜或银铝合金制成,这是取决于隔离开关的额定电流.

what is the difference between molded case circuit breaker and leakage circuit breaker

circuit breaker is a common product in our life. it is an electrical appliance that plays the role of on-off, control or protection in the circuit system. there are many types of circuit breakers, among which plastic case circuit breaker and leakage circuit breaker are quite common. here's the difference between them

causes of faults in molded case circuit breakers

active and static contacts, auxiliary contacts, coils, short circuit rings, arc extinguishing covers and other components of low-voltage plastic case circuit breakers are liable to malfunction. when the equipment fails to trip, it can not be simply closed. it is necessary to check the appearance, arc extinguishing cover and other components for burnout. if so, it is necessary to remove the fault parts for inspection, repair or replacement, and wipe off the stains. here are some common breakdowns of circuit breakers and their solutions

Selection and Installation of Molded Case Circuit Breaker

1. Application place and selection principle of plastic case circuit breaker: 1. High temperature places: ironmaking, casting, boiler room and other places, should choose the pure electromagnetic type (but not too high) which is not affected by temperature. For thermodynamic-electromagnetic type, when the temperature is between 40 60 C, it should be used to reduce capacity, and the temperature above 60 can not be used.

how to avoid wire head faults with contactors in molded case circuit breakers

when using circuit breakers, contactors and circuit breakers are often connected but not electrified. if they are used without testing, the circuit will fail. many people suspect that the reason is that the product is out of order, in fact, because we have problems in the way of wiring, resulting in the absence of phase or short circuit between products. this paper introduces the correct wiring mode of circuit breaker and contactor.

what are the characteristics of plastic case circuit breaker

plastic case circuit breaker is also called device circuit breaker. all parts are sealed in plastic case, auxiliary contacts, undervoltage trippers and shunt trippers are modularized. because of its compact structure, the plastic case circuit breaker can hardly be repaired.

the function of low voltage circuit breaker thermal release

the tripper is a device mechanically connected to the circuit breaker to release the retaining mechanism and automatically disconnect the circuit breaker. its function is that when the line has leakage or personal shock, the current vector through the zero sequence current transformer is not equal to zero. voltage is generated on both sides of the secondary coil of the transformer.

difference between air switch and molded case circuit breaker

processing method for resisting jump of molded case circuit breaker

when the operation of load interruption and power system failure occur in substation, the key equipment is high-voltage circuit breaker, which directly affects the normal operation of the entire power distribution system, is the most vulnerable link in high-voltage power supply and distribution system, and many factors affect the normal operation of high-voltage circuit breaker.

accessories of molded case circuit breaker

causes of coil burning of molded case circuit breaker

in the process of using plastic case circuit breaker, coil burnout often occurs. here are the reasons for coil burnout and how to prevent coil burnout.

Detailed Explanation of Current Limiting Technology for DC Molded Shell Circuit Breaker

When the short circuit current is interrupted, a fast-growing arc, usually called dynamic arc resistance, will be generated in a manicure circuit breaker. Maintaining stable arc combustion requires a certain voltage, and the "dynamic arc resistance" is equivalent to a thousand series resistors in the circuit.

introduction of common circuit breakers

before purchasing circuit breakers, we must make clear the classification of circuit breakers, so that when purchasing, it will not be very entangled. here are some common circuit breakers in life.

differences between molded case circuit breakers and miniature circuit breakers

plastic case circuit breaker mainly provides protection function for overload and short circuit in low voltage distribution system and motor protection circuit. because of its reliability and stability, it has become a widely used product in industry. miniature circuit breaker is also a circuit breaker product with great use range and quantity. its main function is to provide protection for distribution devices of building electrical terminals. both of them belong to circuit breakers. many people are confused and do not know how to choose relays. here is a brief introduction of the differences between them.

brief introduction and protection ability of molded case circuit breaker

plastic case circuit breaker, also known as device circuit breaker, all the internal parts are enclosed in a plastic case, the internal components are modular, with strong sectional ability and isolation protection ability. next, we will introduce the main functions and functions of the plastic case circuit breaker.

how to choose an appropriate circuit breaker

nowadays, circuit breakers are used more and more widely. they can protect circuit in daily life. when the circuit is short-circuited or overloaded, the current will be cut off automatically, which greatly reduces the risk of electric fire in life. in the choice of circuit breakers, many people do not know how to choose the right circuit breaker. here is how to choose the right circuit breaker for you.

common problems and solutions of molded case circuit breaker

low voltage circuit breaker, also known as air circuit breaker. mainly used for automatic disconnection circuit and power cut-off under abnormal circumstances such as overload, short circuit and under-voltage. in the process of using air circuit breaker, we often encounter some problems. here we introduce the common faults and solutions of low voltage circuit breaker.

what is the principle of plastic case circuit breaker?

low voltage circuit breaker (hereinafter referred to as circuit breaker) is a kind of switching device which can not only connect and break normal load current and overload current, but also switch on and break short circuit current. low-voltage circuit breaker not only plays a control role in the circuit, but also has certain protective functions, such as overload, short circuit, under-voltage and leakage protection. it can be used to distribute electric energy, start asynchronous motors infrequently, and protect power lines and motors. widely used in the life, industry, electrical industry.

difference between molded case circuit breaker and frame circuit breaker

what is the meaning of parameters of plastic case circuit breaker

molded case circuit breaker can automatically cut off the current when the current exceeds the jump setting. plastic case refers to the use of plastic insulators as the shell of the device, used to isolate between conductors and grounding metal parts. plastic case circuit breakers usually contain thermomagnetic jump-off units, while large-scale plastic case circuit breakers are equipped with solid-state jump-off sensors...

difference between molded case circuit breaker and electronic molded case circuit breaker

本文主要是关于塑壳断路器与电子塑壳断路器的相关介绍，并着重对它俩的不同点进行了阐述...

Normal Operation Conditions and Installation Conditions of Molded Case Circuit Breakers

Normal Operation Conditions and Installation Conditions of Molded Case Circuit Breakers

Noun Interpretation: Small Molded Case Circuit Breaker

Small plastic case circuit breaker is used in AC 50HZ, rated current to 63A, single-phase 230V and three-phase 400V circuits. It is mainly used for overload and short-circuit protection of lighting lines, as well as in normal circumstances for the less frequent conversion of lines.

Complete internal structure diagram of plastic case circuit breaker

The main contact of the circuit breaker is closed by manual operation. After the main contact is closed, the free release mechanism locks the main contact at the closing position. The thermal element of the thermal release contacts with the free release mechanism. When the circuit is overloaded, the thermal element of the thermal release bends the bimetal sheet, pushes the action of the free release mechanism, and the main contact disconnects the main circuit.

How to check the contact quality of plastic case circuit breaker?

Contact resistance varies greatly by environmental impact, such as temperature, humidity and dust, which can affect the contact resistance. Therefore, it is impossible to measure whether the contact has been damaged by a standard resistance value.

Terminological Interpretation of TT, TN and IT Systems for Molded Case Circuit Breakers

The nouns of TT, TN and IT systems of plastic case circuit breakers explain that TT is a protective grounding system, TN is a zero-connection protection system, IT means that there is no grounding or high resistance grounding on the power side, and the load side carries out grounding protection.

The structure of common plastic case circuit breaker and the function of its important components are explained in detail.

The commonly used plastic case circuit breakers are mainly frame circuit breakers and air circuit breakers. The structure of frame circuit breakers has different components according to the different functions of products.

Some Common Knowledge to Be Noticed and Understood Before Choosing Molded Case Circuit Breaker

Before choosing the type of plastic case circuit breaker, we should determine how much rated current we need, how to install it, what kind of tripping unit we need, whether we need leakage function, what level and breaking ability.

Design of Arc Extinguishing Chamber and Wiring of DC Molded Case Circuit Breaker

The arc extinguishing chamber is a metal grid type arc extinguishing chamber. Melamine plate is used as insulation plate on both sides, cold rolled steel plate is used as grid, and the chamber is designed with slit and staggered upper and lower. When the arc enters the arc extinguishing chamber and is cut into short arcs in series by grids, each short arc has positive and negative polar voltages. The total arc voltage will increase. When the arc voltage is greater than the recovery voltage between contacts, the arc will extinguish the daughter-in-law.

Difference between Grounding Fault Protection and Residual Current Protection in Plastic Shell Circuit Breaker

With the development of electronic technology, electronic outlet units are widely used in plastic case circuit breakers. At the same time, with the enhancement of people's awareness of personal electric shock and electric fire protection, more attention has been paid to the use of grounding protection function of plastic case circuit breaker. Therefore, the difference between grounding fault protection and residual current protection of plastic case circuit breaker conforming to IEC60947-2 standard is clearer.

Technical Performance of DC Molded Case Circuit Breaker

DC plastic case circuit breaker can realize short-circuit current interruption and normal small current interruption under high voltage conditions, without the requirement of positive and negative polarity of DC interruption technology.

Introduction to the Concept of DC Molded Case Circuit Breaker

The concept of DC plastic case circuit breaker: overview, standards, functional characteristics and operating conditions.

Introduction of release characteristics of plastic case circuit breaker

Excitation tripping device belongs to one kind of electromagnetic tripping component, which completes the controlled tripping function of circuit breaker by adding electric signals. If the normal power supply circuit needs to be cut off in the state of fire fighting, the circuit breaker can be broken by applying 24VDC signal to the coil of the shunt tripper of the circuit breaker.

What is the function and working principle of plastic case circuit breaker

Circuit breaker is also called device circuit breaker. It is suitable for protection switch of branch circuit. It can automatically cut off the current when the current exceeds the jump-off setting. It is used to isolate all parts of conductor and grounding metal part, which are sealed in plastic shell. Auxiliary contacts, undervoltage trippers and divider trippers are modularized. Because the structure is very compact, the plastic case circuit breaker can not be repaired basically, so it is generally not considered maintenance.

Service life of plastic case circuit breaker and matters needing attention

Nowadays, plastic case circuit breakers are used more and more widely, which can be said to be a household name. People concerned should know that after some customers purchase this product, the service life is not guaranteed. It often breaks down after a period of time, which brings trouble of maintenance and replacement.

What factors should be considered when purchasing plastic case circuit breaker

With the increasing popularity of plastic case circuit breakers, many industries can use them, and families can also use them. But the plastic case circuit breaker is related to personal safety and can not be purchased casually. It's not like ordinary commodities. It doesn't like to throw them away. If the quality of plastic case circuit breaker is not up to standard, it will cause serious consequences.

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Introduction to the Structure Composition of Molded Case Circuit Breaker

Introduction to the Structure Composition of Molded Case Circuit Breaker

Development Trend of Molded Case Circuit Breaker Industry

With the wider use of plastic case circuit breakers, the requirements for circuit breakers are getting higher and higher. In order to save space and achieve beautiful effect, the volume of circuit breaker is smaller and smaller, but the function is more and more powerful. Molded case circuit breaker is developing towards large current and small volume.

Explanation of Specification Type Meaning of Plastic Case Circuit Breaker of Hangkai Electric Appliance

Hangkai Electric Appliance mainly operates two kinds of moulded case circuit breakers, HKM1 moulded case circuit breaker and HKM3 moulded case circuit breaker, the corresponding model meaning explanation.

Summary of Type Meaning of Common Circuit Breakers

At present, the model of circuit breaker in our country is generally composed of characters, symbols and figures in the following ways according to the national technical standards.

Selection Basis of Miniature Circuit Breaker and Molded Case Circuit Breaker

Miniature circuit breakers and plastic case circuit breakers belong to circuit breakers, and their working principles are the same. The difference is that: 1. The installation mode of miniature circuit breaker is guideway installation, while the plastic case circuit breaker is screw installation. 2. The maximum current level of miniature circuit breaker is less than 63A, and the highest current level of plastic case circuit breaker is 2000A.

Function Introduction and Type Selection Guidance of Moulded Case Circuit Breaker Accessories

As the derivation and supplement of circuit breaker function, the accessory of plastic case circuit breaker (hereinafter referred to as circuit breaker) adds control means and enlarges protection function for circuit breaker, making the use of circuit breaker wider, the protection function more complete, and the operation and installation mode more. Therefore, at present, the accessory of circuit breaker has become an integral part of circuit breaker.

How to choose plastic case circuit breaker?

With the increasing popularity of plastic case circuit breaker, it involves various fields, even at home. The use of plastic case circuit breakers is even related to people's life safety. They can not be purchased and used at will, nor can they be thrown away directly after they are not like other commodities. Once the quality of plastic case circuit breaker is not up to standard, it will cause serious consequences. ...

How to Select Molded Case Circuit Breaker

The selection of molded case circuit breaker can be divided into two aspects: parameter selection and type selection. Parameter selection includes: voltage, current, frequency, mechanical load, dynamic and thermal stable current and duration, voltage withstanding capacity, operation performance, environmental conditions, etc.

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daily maintenance method of molded case circuit breaker

environmental plastic case circuit breaker is mainly used to distribute electric energy and protect power lines and power supply equipment from overload, short circuit, undervoltage and other faults. equipment maintenance regulation is the requirement and regulation of daily maintenance of equipment. persisting in the implementation of equipment maintenance regulation can prolong the service life of equipment and ensure safe and comfortable work.

Detailed Description of Daily Maintenance of Molded Case Circuit Breaker

Daily maintenance of plastic case circuit breaker is the basic work of equipment maintenance. It must be institutionalized and standardized. Regular maintenance work of equipment should be formulated work quota and material consumption quota, and assessed according to the quota. Regular maintenance of plastic case circuit breaker Maintenance work should be included in the assessment of the workshop contractual responsibility system.

Detailed Explanation of Common Faults of Molded Case Circuit Breaker

Plastic case circuit breaker always has some faults in use. Here are some common faults to illustrate: 1. Frequent trips occur 1. The unbalanced three-phase load causes overload tripping of circuit breakers; find out the load condition and set the current reasonably.

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