6300A 3/4P Drawout Air Circuit Breaker, 4000A ACB Frame

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Installation and Testing:

General product information

Description：

The MTW1 series intelligent circuit breaker is suitable for AC 50Hz power distribution networks with rated voltages of 400V and 690V and rated currents of 400A to 7500A. It is used to distribute electrical energy and prevent damage to circuits and electrical equipment due to overload, undervoltage, short circuit, and single-phase grounding. This circuit breaker features intelligent protection functions and precise selective protection, improving power supply reliability and preventing unexpected power outages. The impulse withstand voltage of this circuit breaker at an altitude of 2000 meters is 8000V (adjusted according to standards for different altitudes, with a maximum value not exceeding 12000V).

This product complies with GB14048.2 "Low-voltage switchgear and controlgear - Low-voltage circuit breakers" and IEC60947-2 "Low-voltage switchgear and controlgear - Part 2: Low-voltage circuit breakers" standards.

Working principle：

An air circuit breaker (ACB) operates by automatically cutting off current when it detects an overload or short circuit. During normal operation, its main contacts remain closed, allowing current to flow freely. When a sustained overcurrent occurs, the thermal element bends due to heat, triggering the circuit breaker mechanism. In the event of a sudden short circuit, the solenoid coil generates a momentary magnetic force that trips the circuit breaker mechanism. This action rapidly separates the main contacts. A strong electric arc is generated between the separated contacts and is immediately sent to the arc-extinguishing chamber, where the arc is broken up, cooled, and extinguished, thus safely disconnecting the circuit and preventing system damage.

Quick Detail:

Air Circuit Breaker

ACB

LV ACB

Low Voltage Air Circuit Breaker

Drawout Air Circuit Breaker

DrawoutACB

Fixed Circuit Breaker

High Amperage Circuit Breaker

6300A Circuit Breaker

4000A ACB

Frame Circuit Breaker

6300A Frame ACB

Our 6300A withdrawable air circuit breaker is designed to provide superior electrical protection under demanding conditions, including high-current applications. It functions as a robust main circuit breaker or a power circuit breaker, making it an ideal solution for protecting main power distribution lines and incoming lines in industrial plants, large commercial complexes, data centers, and shipyards.

The innovative withdrawable design ensures maximum operational safety and minimal downtime. Installation, maintenance, and testing are easily accomplished by simply switching the device between the "connected," "test," and "disconnected" positions, without contact with live parts. This heavy-duty air circuit breaker reliably interrupts short-circuit and overload currents, protecting your critical assets and ensuring uninterrupted power to your core business.

Competitive Edge: Superior Safety & Uptime for Demanding Industries

Our 6300A Drawout Air Circuit Breaker is engineered not just to meet specs, but to exceed operational expectations. Unlike fixed alternatives, our patented drawout mechanism allows for swift, safe isolation and maintenance under full load conditions, dramatically reducing downtime by up to 70%. Built with a robust, high-dielectric strength casing and precision-calibrated magnetic trip units, it delivers unwavering protection against the most severe fault currents. We fuse German-grade engineering with agile manufacturing, offering custom-configured solutions and global logistical support that giants can't match. Choose the ACB where innovation is built-in, not bolted on.

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This high-current withdrawable air circuit breaker is designed for mains power distribution and protection in mission-critical, high-capacity power systems. Its primary applications include mains power input protection for industrial plants, large commercial complexes, data centers, and marine power networks, ensuring operational safety and system reliability, and enabling seamless maintenance without downtime.

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