ABB ATS-CB021 Series Automatic Transfer Switch

# **ABB ATS-CB021 Series Automatic Transfer Switch**
In modern power distribution systems, ensuring continuous and stable power supply has become a critical requirement across industries. Hospitals, data centers, communication hubs, industrial plants, and commercial buildings all depend on highly reliable electrical infrastructure to guarantee uninterrupted operation. To address these needs, ABB has developed the **ATS-CB021 Series Automatic Transfer Switch (ATS)**—a compact, intelligent, and highly reliable solution designed to seamlessly manage dual power sources. This article provides an in-depth overview of its design concept, performance advantages, intelligent features, and application value.
## **1. Overview: Ensuring Continuity in Power Supply**
The ABB ATS-CB021 Series is designed to automatically switch between two independent power sources—typically between the main grid and a backup generator or between two utility feeders. In the event of voltage loss, frequency deviation, or grid failure, the device swiftly transfers the load to the alternate source, ensuring minimal disruption to critical equipment.
As an essential component of emergency power systems, the ATS-CB021 integrates ABB’s advanced control logic, robust switching technology, and user-friendly configuration interface. It represents ABB’s commitment to providing safe, reliable, and intelligent low-voltage power solutions for modern facilities.
## **2. Engineering Design and Core Features**
### **(1) Compact and Modular Construction**
The ATS-CB021 Series features a modular design that integrates:
* A reliable changeover mechanism
* An intelligent control unit
* Comprehensive protection functions
This structure simplifies installation, supports flexible wiring, and facilitates maintenance. The compact size makes it ideal for limited-space switchboards and distribution panels.
### **(2) High Electrical Performance**
The ATS-CB021 switches loads using ABB’s advanced breaking and switching components, which offer:
* High mechanical endurance
* Strong thermal and dynamic withstand capability
* Fast and smooth transfer without arc-related risks
The series is available in a wide range of current ratings, making it suitable for both light-duty commercial installations and heavy-duty industrial systems.
### **(3) Precise and Efficient Transfer Logic**
The controller continuously monitors voltage, frequency, and phase angles of both power sources. Upon detecting abnormal parameters—such as undervoltage, phase loss, or frequency deviation—it automatically triggers the transfer based on user-defined logic.
Transfer modes typically include:
* **Auto transfer and retransfer**
* **Manual operation**
* **Time-delay settings to prevent false triggering**
* **Return-to-normal logic** when primary power becomes stable again
These functions maximize system stability while minimizing unnecessary switching.
## **3. Intelligent Control and User-Friendly Configuration**
One of the distinctive advantages of the ATS-CB021 is its intelligent control panel. The controller features an intuitive interface enabling quick configuration of parameters such as:
* Transfer delay times
* Voltage thresholds
* Frequency limits
* Return conditions
* Generator startup timing
LED indicators and status displays provide instant visibility into the operational state. Maintenance personnel can clearly track source availability, load connection, and fault conditions.
The smart controller also supports local and remote operation, enhancing flexibility for different system architectures.
## **4. Safety and Protection Functions**
To ensure dependable operation, the ATS-CB021 incorporates multiple layers of safety protection:
* **Source abnormal protection**: undervoltage, frequency error, phase failure
* **Mechanical interlocking**: prevents simultaneous connection of both power sources
* **Electrical interlocking**: adds software protection against false commands
* **Overcurrent and short-circuit protection** (working with upstream breakers)
* **Emergency manual override** for extreme conditions
These features ensure safe switching under all scenarios and protect both the load and the power system from damage.
## **5. Wide Application Range**
Thanks to its reliability, ease of configuration, and robustness, the ATS-CB021 is widely used across various industries:
### **(1) Medical and Healthcare**
Hospitals rely heavily on life-support and monitoring equipment. ATS-CB021 ensures seamless power transfer to backup generators during grid failures.
### **(2) Data Centers**
Even milliseconds of power loss can lead to data corruption. The ATS-CB021 guarantees continuous power for server racks and cooling systems.
### **(3) Commercial Buildings**
Office buildings, malls, and hotels use ATS systems to maintain lighting, elevators, HVAC and fire systems.
### **(4) Industrial Automation**
Factories require stable power to protect motors, PLCs, variable-speed drives, and production lines.
### **(5) Telecommunications and Utilities**
The ATS-CB021 secures continuous operation for base stations, substations, and network infrastructure.
## **6. Advantages Over Competing Solutions**
Compared with many ATS products on the market, the ABB ATS-CB021 offers superior advantages:
* **Highly reliable switching mechanism** with long mechanical life
* **More intelligent and accurate monitoring** with ABB’s control algorithms
* **Flexible integration** into modern distribution panels
* **Enhanced safety interlocks** meeting international standards
* **Stable performance under harsh grid environments**
* **Lower failure rates and easy diagnostics** reducing maintenance costs
These advantages underscore ABB’s leadership in electrical safety technology.
## **7. Conclusion**
The **ABB ATS-CB021 Automatic Transfer Switch Series** stands out as a dependable, intelligent, and efficient solution for dual-power management. With its advanced control logic, strong protection features, and broad applicability, it ensures uninterrupted operation of critical loads in industries where power reliability is paramount.
For enterprises seeking a robust and future-proof ATS solution, the ATS-CB021 delivers exceptional performance and peace of mind—making it an ideal choice for modern power distribution systems.
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