ATS Dual Power Automatic Transfer Switch-PC

In scenarios such as hospitals, data centers, and high-end office buildings, a power outage for even one second can cause irreparable losses - medical equipment shutdown affects treatment, server downtime results in the loss of core data, and production equipment shutdown leads to huge losses. Traditional CB-level dual power supplies are composed of two circuit breakers connected together, which not only have insufficient breaking capacity and cannot handle large short-circuit currents, but also have a slow switching speed (usually 1000-2500 milliseconds), which is extremely prone to causing the expansion of faults and fundamentally cannot meet the demand for high reliability power supply. ATS Dual Power Automatic Transfer Switch-PC, with an integrated design, completely compensates for the shortcomings of CB-level products, builds a power supply safety defense line for critical scenarios, and ensures power supply every second.

Directly addressing the core demand for high-reliability power supply

The ATS Dual Power Automatic Transfer Switch-PC is centered around "reliability, speed, and efficiency". Each advantage precisely matches the core concerns of the purchasers, making it more competitive than the CB level, more in line with the actual needs of high-demand scenarios, and allowing for greater peace of mind for both purchasing and usage.

PC-level integrated structure, more reliable tripping: Adopting an integrated design, it differs from the crude structure of the CB level where two circuit breakers are connected. There are no sliding or re-engaging mechanical hazards, and its tripping capacity far exceeds that of the CB level. It can easily trip large short-circuit currents, effectively preventing the expansion of faults, and is suitable for critical scenarios with high tripping capacity requirements. It strictly follows the dual standards of IEC 60947-6-1 and GB/T 14048.11 both domestically and internationally, ensuring professional performance.

Automatic and rapid switching, power supply never interrupted: Equipped with an intelligent detection module, it can monitor the operation status of the mains power in real time. Once the mains power is interrupted, it will immediately switch to the backup power source. The switching speed is much faster than that of the CB level, meeting the millisecond-level switching requirements of critical scenarios. There is no need for manual operation throughout the process, ensuring uninterrupted power supply and perfectly addressing the core pain points of "no power outage" in hospitals and data centers, safeguarding the continuous operation of critical equipment.

High stability and low failures, more convenient maintenance: The integrated structure design simplifies the internal mechanical structure, making it more stable in operation, with a fault rate far lower than that of the CB level. There is no need for frequent maintenance, significantly reducing the later maintenance costs. At the same time, it is compatible with harsh operating environments, ensuring stable performance even during long-term continuous operation, completely eliminating the purchasers' concerns about the reliability of the equipment.

Technical Specifications 

Detailed Introduction

Junray Electrical adheres to the principle of quality and pays close attention to every detail. With professional craftsmanship, it ensures the long-term stable operation of the ATS Dual Power Automatic Transfer Switch - PC. Through meticulous attention to details, it eliminates purchasing concerns. The PC-level integrated structure has a higher interrupting capacity and more reliable operation, completely eliminating the drawbacks of the CB-level spliced structure; the intelligent automatic switching design monitors the power supply status in real time, switches precisely and quickly, ensuring uninterrupted power supply; the reliable operating mechanism ensures precise opening and closing actions, smooth switching without any lag, and has an extremely low failure rate; the standardized installation design allows it to be directly installed in distribution boxes and control cabinets, making the installation convenient and saving installation time and labor costs, suitable for various distribution cabinet layouts.

Tailored specifically for high-reliability scenarios

ATS Dual Power Automatic Transfer Switch-PC, with its core advantages of high reliability and rapid switching, is widely applicable to various scenarios that require high power supply reliability. Each scenario can be precisely matched to the requirements, ensuring safer power supply and truly achieving "tailor-made". In hospital power distribution scenarios, it is adapted to supply power to various medical equipment in hospitals, ensuring the continuous operation of surgical equipment and intensive care units, safeguarding life safety, and complying with GB 16895.24-2005 medical facility electrical standards; in data center scenarios, it is adapted to core equipment such as servers and switches, avoiding data loss and business interruption due to power outages; in residential and office building scenarios, it is adapted to the power supply for high-rise residents and commercial offices, ensuring that daily life and office operations are not affected; in photovoltaic dual power switching scenarios, it is adapted to the switching between photovoltaic systems and backup power sources, ensuring stable photovoltaic power supply, and complying with GB/T 19964-2012 photovoltaic power station connection standards.

Customization Assurance

As a professional manufacturer, supplier and factory of ATS Dual Power Automatic Transfer Switch-PC in China, Junray Electrical strictly adheres to the national standard for PC-level dual power automatic transfer switches (GB/T 14048.11-2024). Each device undergoes three core tests: power-on debugging, switching test, and breaking test to ensure that every factory-finished device can operate stably and can smoothly pass the project acceptance. We offer customization of the number of contacts and current. Based on your dual power switching requirements, we can tailor-make exclusive equipment. Whether you are in a hospital, data center or a photovoltaic project, it can be precisely adapted, allowing for worry-free procurement.

Why choose us?

Compared with similar products from other manufacturers, we have a deeper understanding of the core requirements for high-reliability power supply scenarios and can better address the actual concerns of purchasers. Choosing Junray Electrical's ATS Dual Power Automatic Transfer Switch-PC is choosing convenience, peace of mind, and security.

Professional strength endorsement: With years of deep research and production in high-reliability power distribution equipment, we have a complete R&D, production, and quality inspection system, meeting both international and domestic standards, ensuring quality.

Clear differentiation advantages: The PC-level integrated design is stronger, switches faster, and more reliable than the CB-level circuit breaker, precisely addressing the power supply pain points in key scenarios.

Customized services: Supports customization of the number of circuits and current, suitable for different scenario needs, rejecting "one-size-fits-all";

Comprehensive and attentive service: Provides professional selection guidance before sales, and installation and commissioning support after sales, ensuring that the purchasing and usage process is worry-free and facilitating the smooth progress of the project.

Contact us now, lock in this top choice for high-reliability dual power switching equipment, build a power supply defense line for your key scenarios, eliminate the risk of power interruption, and ensure every power supply is stable, safe, and efficient!

Retrofit Case Study

I. Project Overview

This project involves a power distribution system upgrade for the inpatient building and Intensive Care Unit (ICU) of a Grade-A tertiary hospital. It represents a typical "Class I load" power supply scenario, encompassing critical loads such as operating room power systems, ICU life-support equipment, medical oxygen supply units, fire pumps, elevators, and precision equipment in the central server room. These loads require absolute continuity—power outages and momentary shutdowns are strictly prohibited—placing extremely high demands on switching speed, power continuity, and surge/impact resistance. The original system utilized standard CB-class dual-power switches, which suffered from slow switching speeds, susceptibility to tripping caused by high inrush currents, and false switching due to brief voltage dips. Grid fluctuations frequently caused precision medical equipment to reboot and data transmission to be interrupted, failing to meet the standards for uninterrupted power supply required for Class I loads.

To comply with mandatory regulations for Class I loads and ensure the continuous operation of life-safety equipment, the system was fully upgraded to PC-class integrated dual-power automatic transfer switches. This enables rapid switching between two independent utility power sources and a backup generator, ensuring zero power interruption, no false tripping, and absolute operational reliability.

II. Issues Prior to Retrofit

CB-class structure lacks impact resistance and is prone to false tripping: Due to the circuit-breaker-based assembly, inrush currents from motor startups and instantaneous grid fluctuations could easily trigger false trips, cutting off power to critical equipment.

Slow switching speed unsuitable for precision equipment: CB-class switching times range from 1 to 2 seconds, exceeding the power-loss tolerance of precision medical equipment and servers, which often resulted in equipment reboots and data loss.

Failure to meet Class I load acceptance standards: Regulations strictly prohibit the use of CB-class switches for Class I loads—including fire pumps, elevators, and core server room equipment—creating a critical compliance issue.

High risk of parallel connection: The interlocking mechanism of the dual-circuit-breaker assembly lacked precision; long-term mechanical wear created a risk of the two power sources accidentally connecting in parallel.

Poor stability under heavy loads: Contacts were prone to overheating and vibration during the startup and shutdown of high-power loads, compromising power supply continuity. 

III. Equipment Configuration Plan

In accordance with hospital standards for "Class I" power loads and fire safety requirements for critical loads, the core power distribution cabinets utilize PC-class integrated dual-power automatic transfer switches (ATS). Featuring a pure load-switch structure without circuit-breaker trip mechanisms, these units offer high surge current tolerance, rapid switching speeds, and precise mechanical interlocking, making them ideal for critical, uninterrupted loads.

Core Equipment Specifications

Model: PC-class integrated dual-power automatic transfer switch (ATS)

Rated Voltage: AC 380V/220V

Rated Current: 160A–250A (suitable for hospital main power and server room loads)

Structural Features: Integrated unit design; no independent circuit breakers; no overload trip mechanisms

Switching Speed: Ultra-fast switching (0.1–0.5s); meets requirements for uninterrupted operation of precision equipment

Tolerance: Withstands motor startup surge currents; no tripping or false operation during short-term overloads

Interlocking Method: Precision integrated mechanical-electrical interlock; completely prevents parallel connection of the two power sources

Applicable Loads: Hospital Class I loads, fire pumps, elevators, data centers, and critical equipment requiring uninterrupted power

IV. Application Highlights

Integrated Structure, Eliminates False Tripping: PC-class design excludes overload/short-circuit tripping functions; the unit handles switching only and does not trip unnecessarily, effectively solving power outage issues caused by surge currents in critical equipment.

Ultra-fast Switching, Truly Uninterrupted: Millisecond-level switching ensures seamless transitions during grid flickers or momentary voltage drops, preventing restarts or data loss for precision medical and IT equipment.

Superior Surge Tolerance: Designed to withstand startup surges from water pumps, elevators, and large machinery; tolerance far exceeds CB-class standards; stable, cool operation under heavy-load conditions.

Highly Reliable Interlocking: Precision integrated mechanical interlock structure minimizes wear; ensures smooth, jam-free long-term operation with zero risk of parallel power source connection.

Complies with Mandatory Class I Load Standards: Meets strict regulatory requirements (building electrical and fire safety codes) mandating the use of PC-class dual-power switches for critical Class I loads; ensures 100% pass rate for inspections. V. Operational Performance After Retrofitting

True uninterrupted power supply for critical equipment: Medical equipment, server rooms, and fire safety systems experienced zero downtime and zero restarts during multiple grid fluctuations, momentary power outages, and generator switchover tests.

Complete elimination of nuisance tripping: Inrush currents and short-term overloads no longer trigger accidental disconnections; power supply stability has reached 100%.

Precise switching with no jitter or overheating: Contacts remain stable and temperature rise stays within normal limits during long-term heavy-load operation; no mechanical jamming or abnormal noise occurs.

Full compliance with fire safety and medical acceptance standards: Compliant configuration for Class I loads and reliable switching logic ensured successful completion of specialized acceptance inspections.

Extremely low maintenance failure rate: Simple structure, absence of vulnerable tripping components, and long mechanical lifespan result in minimal long-term maintenance costs.

VI. Case Summary

PC-class dual-power transfer equipment is designed specifically for Class I loads, fire pumps, elevators, hospitals, data centers, and critical server rooms. Key advantages include an integrated structure, no tripping mechanism, high surge resistance, rapid switching speeds, and immunity to false operation. While CB-class devices are used for standard Class II loads, PC-class devices serve critical Class I loads, with distinct roles and strict regulatory standards for each. PC-class equipment fundamentally resolves issues such as momentary power outages, nuisance tripping, and equipment restarts for critical loads, serving as a core component for ensuring high-standard power distribution and safe, reliable power supply in buildings.