High-Performance Air Circuit Breaker 1600A–6300A, Fixed and Drawout Type

Description:

Air circuit breakers (ACBs) are high-performance low-voltage circuit breakers. Notable models include the MT/NT and MVS series. Its rated current spans from 630A to 6300A, and the breaking capacity reaches up to 150kA. It is ideal for industrial, commercial, and energy distribution systems.

Applications:

Air Circuit Breakers (ACBs) stand as the first line of defense in main power distribution and protection systems. Their vital applications span industrial facilities, expansive commercial complexes, critical data centers, and essential public infrastructure such as airports and hospitals. In these mission-critical environments, ACBs ensure system integrity, protect costly equipment from electrical faults, and guarantee continuous operational safety and reliability.

An air circuit breaker (ACB) operates by automatically interrupting current flow upon detection of overload or short-circuit. Under normal conditions, its main contacts remain closed to allow unobstructed current flow. When sustained overcurrent occurs, the thermal element warps from heat accumulation, triggering the tripping mechanism. In sudden short-circuit events, the solenoid coil produces an instantaneous magnetic force to activate the tripping mechanism. This action rapidly separates the main contacts, generating a strong electric arc that is immediately directed to the arc-extinguishing chamber. There, the arc is split, cooled, and extinguished, safely disconnecting the circuit and preventing system damage.

Mechanical Interlock for NTNW Series.mp4
ACB Accessories and Assembly for NTNW Series.mp4

Product Accessories

Arc Extinguisher
Sensor Plug
Pre-wired Terminal Block
Motor
Mechanism interlocking
Machanism
Copper Bar
Control Unit Micrologic
Coil
Auxiliary Contact
Moving Contact
Main Body
Drawerseat
Contacts
Contacts
Contacts

To ensure transportation safety, our electrical products are exported in reinforced wooden crates. The crates undergo heat treatment and bear the ISPM-15 mark, enabling swift customs clearance. The raised base design facilitates forklift operation, while internal shock-absorbing fastening ensures the products arrive intact. All exterior crates are clearly labeled and comply with international logistics standards.

Photovoltaic Grid-Connected Cabinet Utilising ACB and MCCB
Power transmission successful
Application Scenario Footage
Box-typesubstation ACB VCB MCCB
Box-typesubstation ACB VCB MCCB
Box-typesubstation ACB VCB MCCB
Box-typesubstation ACB VCB MCCB
Power transmission successful
Power transmission successful
Photovoltaic Grid-Connected Cabinet Utilising ACB and MCCB
Photovoltaic Grid-Connected Cabinet Utilising ACB and MCCB

Current	630A-6300A
Number of pole	3P / 4P
Breaking Capacity	N1,N2,H1,H1B,H2,H3,L1
Type	Fixed / Drawer
Model	MTMT/MTNW/MTMVS

On-site M Circuit Breaker Type	MTMT			MTNW
On-site M Circuit Breaker Type	MTN1	MTH1	MTH2	MTN1	MTH1	MTH2
M08 3P/4P	√	√	√	√	√	√
M10 3P/4P	√	√	√	√	√	√
M12 3P/4P	√	√	√	√	√	√
M16 3P/4P	√	√	√	√	√	√
M20 3P/4P	√	√	√	√	√	√
M25 3P/4P	√	√	√	√	√	√
M32 3P/4P		√	√			√

Model NO.	MT12N1
Arc-extinguishing Medium	Air
Structure	ACB
Type	Circuit Breaker
Certification	ISO9001-2000, CE, CCC
Single Gross Weight	25.000kg
Material	High Standard Plastic Silver Copper
Rated Frequency (Hz)	50/60
Protection	IP30
Style	Fixed Type
Transport Package	Wooden Box
Trademark	MINGTUO
HS Code	8536200000
Speed	High-Speed Circuit Breaker
Installation	Fixed
Poles Number	3or4
Function	Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection, OVP(Overvoltage Protection)
Selling Units	Single Item
Single Package Size	27X32X40 Cm
Rated Voltage	AC400V
Productname	Acb Air Circuit Breaker
Pole	3p/4p
Certificate	IEC CE CCC
Specification	customized
Origin	Zhejiang, China
Production Capacity	300
Package Size	27.00cm * 32.00cm * 40.00cm
Package Gross Weight	26.000kg

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NT & NW Air Circuit Breakers

High-Performance Air Circuit Breaker 1600A–6300A, Fixed and Drawout Type