China Universal Circuit Breaker (ACB) Supplier & Factory

Universal Circuit Breaker (ACB) are more commonly referred to as frame-type circuit breakers or air circuit breakers in the industrial field.

Universal circuit breakers are responsible for carrying huge normal working currents in the circuit and can safely and reliably cut off the circuit when the most serious short-circuit fault occurs in the system, preventing catastrophic accidents.

Product features

Strong carrying and breaking capacity: The rated current can be extended from 630A to 6300A or even higher, and the breaking capacity (ICU/Ics) is usually between tens and hundreds of kiloamperes (kA), which is sufficient to handle the maximum expected short-circuit current at the outlet of large transformers.

Structural framing: The main body of the product is a sturdy metal frame, with the contact system, operating mechanism, tripping unit, arc extinguishing chamber, etc. installed in a modular form inside. This framing design is easy to maintain and upgrade.

Intelligent tripping: This product adopts a programmable electronic tripping device. Users can precisely set protection parameters based on the actual conditions of the power grid and load, enabling selective protection.

Under what circumstances is a universal circuit breaker needed?

When the electrical system is large in scale, ordinary circuit breakers cannot meet the requirements:

In large factories or data centers, transformers have a large capacity. If a short circuit occurs, universal circuit breakers are needed to safely cut off the power.

In places such as hospitals, data centers, and semiconductor production lines where large-scale power outages are not feasible, the "selective protection" function of universal circuit breakers is required to minimize fault isolation.

Main application scenarios:

Main incoming line protection: This is for the low-voltage outgoing switchgear from transformers in big commercial buildings, industrial parks, hospitals, and airports—basically, the main power feed at the heart of these facilities.

Busbar tie protection: Used in busbar tie cabinets that connect two transformers or two separate incoming power lines, helping keep things running smoothly when switching between sources.

Extra-large capacity load protection: Think main intake switchgear in massive data centers, rolling mills in steel plants, or large marine power systems—places where power demands are huge.

Power generation system outlet: Protects the output end of diesel generators and UPS systems, making sure generated power feeds safely into the grid or building system.

Product specifications: