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Air Circuit Breaker

Air Circuit Breakers(ACBs) are electrical device used to provide Overcurrent and short-circuit protection. It opens or closes a circuit automatically or manually. Open circuit automatically when a fault take place such as over current, short circuit, earth fault, over frequency, reverse power, etc. More

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NDW3-1600/200A/3/KY

3 Poles breaker acb circuit breaker 50kA air circuit breaker switch

Manufacturer P/N: NDW3-1600/200A/3/KY

Brand: Nader

Parameters: NDW3-1600 series | AC 440V / 480V | Fixed type | 200A | 3 Poles | 50kA | LCD display | General type

US $1545.24 /Piece

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NDW3-1600/400A/3/KY-TH

NDW3-1600 series circuit breaker air switch 3 Poles air circuit breakers

Manufacturer P/N: NDW3-1600/400A/3/KY-TH

Brand: Nader

Parameters: NDW3-1600 series | AC 440V / 480V | Fixed type | 400A | 3 Poles | 50kA | LCD display | TH type

US $2070.22 /Piece

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NDW3-1600/630A/4/KM

Nixie tube display acb breaker 630A air conditioner circuit breaker

Manufacturer P/N: NDW3-1600/630A/4/KM

Brand: Nader

Parameters: NDW3-1600 series | AC 440V / 480V | Fixed type | 630A | 4 Poles | 50kA | Nixie tube display | General type

US $2220.22 /Piece

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NDW3-1600/800A/4/KM-TH

4 Poles air circuit breaker parts 800A remote control air circuit breaker

Manufacturer P/N: NDW3-1600/800A/4/KM-TH

Brand: Nader

Parameters: NDW3-1600 series | AC 440V / 480V | Fixed type | 800A | 4 Poles | 50kA | Nixie tube display | TH type

US $2895.35 /Piece

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NDW3-1600/1250A/3/KM

50kA remote control air circuit breaker AC 440V / 480V air circuit breakers acb

Manufacturer P/N: NDW3-1600/1250A/3/KM

Brand: Nader

Parameters: NDW3-1600 series | AC 440V / 480V | Fixed type | 1250A | 3 Poles | 50kA | Nixie tube display | General type

US $2175.25 /Piece

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NDW3-1600/1250A/4/KY

NDW3-1600 series intelligent air circuit breaker 4 Poles air circuit breaker

Manufacturer P/N: NDW3-1600/1250A/4/KY

Brand: Nader

Parameters: NDW3-1600 series | AC 440V / 480V | Fixed type | 1250A | 4 Poles | 50kA | LCD display | General type

US $2895.35 /Piece

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NDW3-1600/1600A/3/KM-TH

3 Poles big circuit breaker NDW3-1600 series universal intelligent air circuit breaker

Manufacturer P/N: NDW3-1600/1600A/3/KM-TH

Brand: Nader

Parameters: NDW3-1600 series | AC 440V / 480V | Fixed type | 1600A | 3 Poles | 50kA | Nixie tube display | TH type

US $2790.33 /Piece

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NDW3-1600/1600A/4/KY-TH

AC 440V / 480V circuit breaker air switch LCD display low voltage air circuit breaker

Manufacturer P/N: NDW3-1600/1600A/4/KY-TH

Brand: Nader

Parameters: NDW3-1600 series | AC 440V / 480V | Fixed type | 1600A | 4 Poles | 50kA | LCD display | TH type

US $3735.42 /Piece

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NDW3-1600/C/400A/3/KY

General type circuit breaker for equipment protection 50kA universal air circuit breaker

Manufacturer P/N: NDW3-1600/C/400A/3/KY

Brand: Nader

Parameters: NDW3-1600 series | AC 440V / 480V | Drawout type | 400A | 3 Poles | 50kA | LCD display | General type

US $2400.24 /Piece

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NDW3-1600/C/630A/3/KY-TH

TH type air type circuit breakers 3 Poles over voltage circuit breaker

Manufacturer P/N: NDW3-1600/C/630A/3/KY-TH

Brand: Nader

Parameters: NDW3-1600 series | AC 440V / 480V | Drawout type | 630A | 3 Poles | 50kA | LCD display | TH type

US $2955.41 /Piece

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NDW3-1600/C/800A/4/KM

50kA air circuit breaker types 800A air case circuit breaker

Manufacturer P/N: NDW3-1600/C/800A/4/KM

Brand: Nader

Parameters: NDW3-1600 series | AC 440V / 480V | Drawout type | 800A | 4 Poles | 50kA | Nixie tube display | General type

US $3015.32 /Piece

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NDW3-1600/C/1000A/4/KM-TH

TH type electronic air circuit breaker 1000A air circuit breaker types

Manufacturer P/N: NDW3-1600/C/1000A/4/KM-TH

Brand: Nader

Parameters: NDW3-1600 series | AC 440V / 480V | Drawout type | 1000A | 4 Poles | 50kA | Nixie tube display | TH type

US $3855.39 /Piece

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NDW3-1600/C/1600A/3/KM

3 Poles motor air circuit breaker Drawout type air circuit breaker types

Manufacturer P/N: NDW3-1600/C/1600A/3/KM

Brand: Nader

Parameters: NDW3-1600 series | AC 440V / 480V | Drawout type | 1600A | 3 Poles | 50kA | Nixie tube display | General type

US $2775.39 /Piece

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NDW3-1600/C/1600A/4/KY

General type air break circuit breaker 4 Poles low voltage circuit breaker

Manufacturer P/N: NDW3-1600/C/1600A/4/KY

Brand: Nader

Parameters: NDW3-1600 series | AC 440V / 480V | Drawout type | 1600A | 4 Poles | 50kA | LCD display | General type

US $3705.39 /Piece

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NDW3-1600/400A/3/KM

50kA air circuit breakers acb NDW3-1600 series air type circuit breaker

Manufacturer P/N: NDW3-1600/400A/3/KM

Brand: Nader

Parameters: NDW3-1600 series | AC 660V / 690V | Fixed type | 400A | 3 Poles | 50kA | Nixie tube display | General type

US $1635.17 /Piece

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NDW3-1600/200A/3/KM

General type intelligent universal air circuit breaker AC 660V / 690V automatic air circuit breaker

Manufacturer P/N: NDW3-1600/200A/3/KM

Brand: Nader

Parameters: NDW3-1600 series | AC 660V / 690V | Fixed type | 200A | 3 Poles | 50kA | Nixie tube display | General type

US $1455.15 /Piece

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NDW3-1600/400A/4/KY

4 Poles air circuit breaker working principle 400A conventional circuit breaker

Manufacturer P/N: NDW3-1600/400A/4/KY

Brand: Nader

Parameters: NDW3-1600 series | AC 660V / 690V | Fixed type | 400A | 4 Poles | 50kA | LCD display | General type

US $2190.19 /Piece

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NDW3-1600/200A/4/KY

Fixed type air circuit breaker acb 50kA smart circuit breakers

Manufacturer P/N: NDW3-1600/200A/4/KY

Brand: Nader

Parameters: NDW3-1600 series | AC 660V / 690V | Fixed type | 200A | 4 Poles | 50kA | LCD display | General type

US $1935.16 /Piece

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FAQ

What does Air Circuit Breaker?

Air Circuit Breaker (ACB) is an electrical device used to provide Over-current and short-circuit protection for electric circuits from 200 Amps to 6300 Amps. These are usually used in low voltage applications below 690V, but some special application needs meet 1000V, such as, photovoltaic power generation. Nader manufacture NDW2-4000 series and NDW3 series can meet 1000V AC.

Air circuit breakers operate with their contacts in free air. Their method of arc quenching control is entirely different from that of oil circuit-breakers. They are always used for a low-voltage interruption and now trends to replace high-voltage oil breakers.


How to work Air Circuit Breaker?

Air Circuit breakers generally have two pairs of contacts. The main pair of contacts one carries the current at normal load and these contacts are made of copper metal. The second pair is the arcing contact two and is made of carbon. When the circuit breaker is being opened, the main contacts open first. When the main contacts opened the arcing contacts are still in touch with each other. As the current gets a parallel low resistive path through the arcing contact, during the opening of the main contacts, there will not be any arcing in the main contact. The arcing is only initiated when finally the arcing contacts are separated. Each of the arc contacts is fitted with an arc runner which helps, the arc discharge to move upward due to both thermal and electromagnetic effects.

The arc in the chute will become colder, lengthen, and split hence arc voltage becomes much larger than the system voltage at the time of operation of an air circuit breaker, and therefore the arc is extinguished finally during the current zero.


How many types of air circuit breakers are there?

There are mainly two types of ACB, 3 poles air circuit breaker and 4 poles air circuit breaker.

How do I choose an air circuit breaker?

The current-carrying capacity (In, A) of the breaker should be higher than the expected load in the circuit. ABCs are available 200 up to 6300A, but become less cost-effective for very large ratings (2000A and above). The advantage of ACBs for very large ratings is their big current and breaking capability.