Drawer Type Air Circuit Breakers

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MT 6300A Draw-Out Air Circuit Breaker for High-Current Power Distribution

Description: Product Overview

The MT Series Draw-Out Air Circuit Breaker is designed for low-voltage main distribution systems that require high current capacity, operational flexibility, and reliable protection performance. With a withdrawable structure, the breaker can be safely inserted, withdrawn, or isolated without disconnecting the main wiring, making inspection and maintenance more efficient.

Covering a rated current range from 2000A to 3200A, this series is suitable for use as a main incoming breaker or heavy-duty feeder breaker in industrial and commercial power systems. Its air arc-extinguishing design enables stable interruption performance under overload and short-circuit conditions, helping maintain system continuity and equipment safety.

The MT Series complies with relevant low-voltage circuit breaker standards, including IEC 60947-2 and GB 14048.2, making it suitable for integration into standardized switchgear assemblies and power distribution cabinets.Widely used in photovoltaic power generation, new energy industrial and mining enterprises, AI data centers, power plants, aluminum production plants.


Applications:

Draw-out air circuit breakers in the MT Series are widely used in low-voltage power distribution systems where high current ratings and operational reliability are required. Typical applications include:

Industrial manufacturing plants

Commercial and mixed-use buildings

Data centers and critical facilities

Hospitals and public infrastructure

Power distribution panels and switchgear systems

Their withdrawable design makes them especially suitable for installations that require routine maintenance, system upgrades, or reduced downtime.

  • Working Principle
  • Quality Explanation
  • Product Features
  • Installation & Commissioning
  • Packaging & Shipping
  • Project Cases
  • Product Selection Guide
  • ACB installation And Test
  • ACB Installation
  • ACB
  • Double Circuit Breakerswitching Cabinet
  • Working Principle
  • Moving And Static Contact
  • ACB Machanism

When the product is in the closed and powered on state, if there is overload or short circuit, undervoltage or phase loss in the circuit, the current transformer in the ACB will detect the current signal, which will be transmitted to the controller. The controller will then send a command to the mechanism to trip, causing the dynamic and static contacts to separate and disconnect, and the product will open, achieving the function of protecting the backend load.

Dual power supply realizes mechanical and electrical interlocking, switching between two power supply lines. When the mains power is available, the circuit breaker of the mains power is closed, but the power generation cannot be closed. When the mains power is cut off, the generator generates power, and the circuit breaker of the power generation line is closed, but the mains power cannot be closed. Only one of the two power sources can be closed.

  • Product Debugging
  • Product Debugging
  • Product Debugging
  • ACB
  • ACB installation And Test
  • Working Principle
  • Moving And Static Contact
  • ACB Machanism
  • Double Circuit Breakerswitching Cabinet
  • ACB Closing/Opening - Energy Storage - Overload - Short Circuit - Undervoltage Testing
  • ACB Closing/Opening - Energy Storage - Overload - Short Circuit - Undervoltage Testing
  • ACB Closing/Opening - Energy Storage - Overload - Short Circuit - Undervoltage Testing
  • ACB Closing/Opening - Energy Storage - Overload - Short Circuit - Undervoltage Testing
  • ACB Closing/Opening - Energy Storage - Overload - Short Circuit - Undervoltage Testing

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.

  • High And Low Voltage Switchgear ACB MCCB VCB
  • Box-Type Substation Uses Our VCB, MCCB, and ACB
  • High And Low Voltage Cabinets Successfully Powered
  • Photovoltaic Grid-Connected Cabinet Utilising ACB and MCCB
  • Power transmission successful
  • Box-typesubstation ACB VCB MCCB
  • Box-typesubstation ACB VCB MCCB
  • Box-typesubstation ACB VCB MCCB
  • Application Scenario Footage
  • Power transmission successful
  • Power transmission successful
  • Photovoltaic Grid-Connected Cabinet Utilising ACB and MCCB
  • Photovoltaic Grid-Connected Cabinet Utilising ACB and MCCB
  • Box-typesubstation ACB VCB MCCB

Model MTW1-2000 MTW1-3200 MTW1-4000 MTW1-6300 MTW1-7500
Shell current Inm(A) 2000 3200 4000 6300 7500
Number of poles - 3P / 4P 3P / 4P 3P / 4P 3P / 4P 3P / 4P
Rated working voltage Ue(v) AC400/690 AC400/690 AC400/690 AC400/690 AC400/690
Rated current In(A) 4.00601E+24 2.00025E+15 3.20036E+11 4.0005E+11 7500
Rated insulation voltage Ui(v) 800 1000 1000 1000 1000
Rated impulse withstand voltage Uimp(kv) 8 12 12 12 12
Controller model - L, M, H L, M, H L, M, H L, M, H L, M, H
Operating frequency (Hz) 50 50 50 50 50
Rated limit short-circuit breaking capacity Icu kA (o-co) 400V 65 100 100 120 120
690V 50 65 75 85 85
Rated running short-circuit breaking capacity Ics kA (o-co-co) 400V 40 65 80 100 100
690V 40 50 65 75 75
Rated short time withstand current IcwkA(1s)
Time delay 0.4s o-co
50 65 65 85 85
Power loss (In) W Fixed 40,60,90,140,170 170,260,320,420 430,440,450 1.22513E+11 1.22513E+11
Drawer  80,130,205,310 400,510,650,760 780,790,800
Standard - GB-TGB14048.2/IEC60947-2 GB-TGB14048.2/IEC60947-2 GB-TGB14048.2/IEC60947-2 GB-TGB14048.2/IEC60947-2 GB-TGB14048.2/IEC60947-2
Installation Method - Fixed Type (3/4) Fixed Type (3/4) Fixed Type (3/4) Fixed Type (3/4) Fixed Type (3/4)
Drawer Type (3/4) Drawer Type (3/4) Drawer Type (3/4) Drawer Type (3/4) Drawer Type (3/4)
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Zhejiang Mingtuo Electrical Technology Co., Ltd.
Zhejiang Mingtuo Electrical Technology Co., Ltd.
Zhejiang Mingtuo Electrical Technology Co., Ltd. is a technology-driven enterprise specializing in the research, development, and manufacturing of low-voltage and medium-voltage circuit breakers. Leveraging Liushi's comprehensive electrical industry chain and local advantages, we provide reliable and safe electrical protection products along with customized solutions for global industrial, commercial, and residential power distribution systems. We are committed to becoming a trusted electrical protection partner for global customers through professional engineering capabilities, consistent manufacturing quality, and flexible customization services.
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