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Máy Cắt Không Khí Là Gì

admin - 15/12/2021 219

Máy cắt không gian (ACB) là 1 trong sản phẩm năng lượng điện được thực hiện nhằm cung cấp bảo đảm an toàn quá loại cùng nđính thêm mạch cho các mạch điện trên 800 Ampe cho 10K Amps. Đây thường xuyên được áp dụng trong số vận dụng năng lượng điện áp phải chăng bên dưới 450V.

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Thiết bị đóng giảm - Circuit Breaker CB

A circuit breaker is a device, which can:- Make or Break a circuit manually or by remote control under normal conditions;- Break a Circuit automatically under fault conditions (like over current, Short circuit, etc.);- Make a circuit manually or by remote control under fault conditions.A circuit breaker is used for switching mechanism & protection of the system. Other associated devises and components are also used for this purpose associated with circuit breakers likefuses, relays,switchesetc. Circuit breakers are widely used in industries as well as nguồn system for controlling & protection of different parts of the circuit like: switchgears,Transformers,Motors,Generators/Alternatoretc., which leads the system stable và reliable.There are different types of circuit breakers available in the market and we will discuss one by one in detail.

Máy giảm không khí - Air Circuit Breaker (ACB)

The type of circuit breaker, which operates in air (whereair-blast as an arc quenching medium) at atmospheric pressure, is known khổng lồ be anAir Circuit Breaker. Air circuit breaker has completely replaced by oil circuit breaker. In different countries, still it is a preferable choice lớn use an Air circuit breaker up to 15KV because, there is no chance of oil fire like in oil circuit breaker.

Cấu trúc của một Máy giảm không khí - Air-Circuit Breaker (ACB)

Air Circuit Breaker Construction(ABB EMax Low Voltage, Current Limiting Air Circuit Breaker và Selective sầu (Non-Current Limiting) Air Circuit Breaker)

Delixi Air Circuit Breaker External labels (Rated Current & Voltage = 1kA, 415V)01. OFF button (O)02. ON button (I)03. Main contact position indicator04. Energy storage mechanism status indicator05. Reset Button06. LED Indicators07. Controller08. “Connection”, “Test” & “isolated” position stopper (the three-position latching/locking mechanism)09. User-supplied padlock10. Connection “,” Test “and” separation “of the position indication11. Connection (CE) Separation, (CD) Test (CT) Position indication contacts12. Rated Name Plate13. Digital Displays14. Mechanical energy storage handle15. Shake (IN/OUT)16. Rocker repository17. Fault trip reset buttonCấu trúc bên trong của máy cắt không khí - Air Circuit Breaker (ACB) (ABB EMax Low Voltage Current Limiting Air Circuit Breaker và Selective (Non-Current Limiting) Air Circuit Breaker)

(ABB EMax Low Voltage Current Limiting Air Circuit Breaker and Selective sầu (Non-Current Limiting) Air Circuit Breaker)01. Sheet Steel Supporting Structure02. Current Transformer for Protection Trip Unit03. Pole Group insulating box04. Horizontal rare terminals5a. Plates for fixed main contacts5b. Plates for fixed arcing Contacts6a. Plates for Main moving contacts6b. Plates for Moving Arcing contacts07. Arcing Chamber08. Terminal box for fixed version – Sliding Contacts for withdrawable version09. Protection Trip Unit10. Circuit breaker Closing & Opening Control11. Closing Springs

Nguim tắc hoạt động vui chơi của Máy cắt không gian - Air Circuit Breaker (ACB)

The working principle ofAir Circuit breakeris rather different from other types of circuit breaker. The main aim of circuit breaker is lớn prevent reestablishment of arcing after current zero where the contact gap will withstand the system recovery voltage. It does it same work, but in a different manner. During interruption of arc, it creates an arc voltage instead of supply voltage. Arc voltage is defined as the minimum voltage required for maintaining arc .The circuit breaker increases the voltage in three different ways:- Arc voltage can be increased by cooling arc plasma. As soon as the temperature of arc plasma motion of particle in arc plasma is reduced, more voltage gradient will be required to maintain the arc.- By splitting the arc into lớn a number of series will increases the arc voltage.- Arc voltage can be increased by lengthening the arc path. As soon length of arc path is increased the resistance path will increase more arc voltage is applied across the arc path hence arc voltage is increased.It is operated within voltage cấp độ up to lớn 1 KV. It contains two pairs of liên hệ. The main pair carries the current and the contact made of copper. An additional pair of contact is made of carbon. When the breaker is opened, the main contact opens first. During opening of the main liên hệ, the arc contact remains in touch with each other. The arcing gets initiated when arc contacts are separated. The circuit breaker is obsolete for medium voltage.

Phân nhiều loại vật dụng giảm bầu không khí - Air circuit breaker (ACB)

- Plain air circuit breakerorCross-Blast Air Circuit Breaker- Air blast circuit breakerPlain air circuit breaker or Cross-Blast Air Circuit BreakerThe circuit breaker is fitted with a chamber surrounding the contact. The chamber is known as “arc chute”. The arc is made to lớn drive sầu in it. The arc chute will help in achieving cooling. Arc chute is made from some refractory material. The inner walls of arc chute are shaped in such a way that arc is not only forced inlớn cthảm bại proximity, but will drive into lớn the serpentine channel projected on arc chute wall.The arc chute is divided into a number of small compartments by using metallic separation plates. Metallic separation plates are arc splitters and each of small compartments behave as a mini arc chute. Initial arc will split inkhổng lồ a series of arcs this will make all arc voltages higher than system voltage. They are preferable choice in low voltage application.

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Air blast circuit breakerThis type of circuit breaker is used for system voltage of 245 KV, 4trăng tròn KV & even more.Air blast circuit breaker has further divided into lớn three categories:- Axial blast breaker- Axial blast with sliding moving contact.Axial blast breakerThe moving contact is in tương tác. There is a nozzle orifice in fixed liên hệ at normal closed condition of breaker. When a fault occur high pressure is introduced into the chamber. High-pressure air will flow through nozzle orifice voltage is sufficient to sustain.Axial blast with sliding moving contactThe moving liên hệ is fitted over a piston supported by a spring. The blast transfers arc to arcing electrode.

Advantages of Air-Blast Circuit Beaker

Air blast circuit breaker is a suitable option to lớn use where frequent operation is required because of lesser arc energyThe risk of fire is eliminated in the operation of Air blast circuit breaker.Air blast circuit breaker is small in kích thước, because of the growth of dielectric strength is so rapid (which final contact gap needed for arc extinction is very small).Speed of circuit breaker is much higher during operation of the air blast.Arc quenching is much fasterThe duration of the arc is same for all values of current.Stability of operation can be maintained và depends on speed operation of circuit breakers.It requires less maintenance.

Disadvantages of Air-Blast Circuit Breaker

The air supplier plant requires additional maintenance.It contains high capađô thị air compressor.There is a chance of air pressure leakage from the air pipes junction.There is chance of a high rate rise of re-striking voltage và current chopping.The air has relatively lower arc extinguishing properties.

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Application và Uses of Air Circuit Breaker

- It is used for protection of plants- It is used for comtháng protection of electrical machines- It used for protection of transformers, capacitors & generators.- Air circuit breaker is also used in Electrithành phố sharing system and NGD about 15kV- Also used in Low as well as High voltage & Currents applications .