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Enerzip® ATSE Series – Automatic Transfer Switches for Generator ATS front panel for automatic dual power transfer control
Enerzip® ATSE Series – Automatic Transfer Switches for Generator ATS control panel for distribution board integration and standby power switching
Enerzip® ATSE Series – Automatic Transfer Switches for Generator integrated with diesel generator set for automatic backup power system

Automatic Transfer Switches (ATS)

ATSE Series – Automatic Transfer Switches for Generator-Based Power Systems

Reliable Dual Power Transfer for Critical & Standby Applications

The Enerzip® ATSE Series Automatic Transfer Switches (ATS) are designed to ensure uninterrupted power supply by automatically transferring electrical loads between the utility source and a standby power source, such as diesel generator sets. Developed in accordance with IEC 60947-6-1 and GB 14048.11, the ATSE Series provides fast, safe, and reliable switching performance for generator-based standby and emergency power systems.

With a rated current range from 80A to 3200A, the ATSE Series is suitable for both commercial installations and heavy-duty industrial power systems. It is commonly applied in generator-backed standby, prime, and emergency power configurations where continuity, safety, and operational reliability are essential.

  • Automatic Dual Power Transfer – Automatically switches loads between utility and generator power during outages and recovery.
  • Fast & Secure Operation – Typical transfer time ≤1 second, with adjustable delay settings for sensitive loads.
  • Wide Current Coverage – Rated from 80A to 3200A, compatible with small to large generator sets.
  • Industrial-Grade Safety – Integrated mechanical and electrical interlocking prevents unintended parallel connection of power sources.
  • Controller Compatibility – Supports integration with DSE, ComAp, DEIF, and SmartGen generator controllers.
  • Enerzip® System Integration – Engineered to operate seamlessly with Enerzip® diesel generator systems for long-term stability and coordinated operation.
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Description

Enerzip® Automatic Transfer Switches (ATSE) Series

The Enerzip® ATSE Series Automatic Transfer Switches (ATS) are engineered to provide safe, reliable, and fully automatic power transfer between primary and standby power sources. The system continuously monitors the utility supply and transfers electrical loads to a backup source—such as a diesel generator set—when abnormal conditions are detected, ensuring uninterrupted operation of essential loads.

Designed for high-rise buildings, telecommunications facilities, industrial production lines, hospitals, data centers, and critical infrastructure, the ATSE Series supports both generator-integrated and standalone transfer configurations. This makes it suitable not only for emergency backup systems, but also for standby and prime power applications where operational continuity is required during utility outages or scheduled maintenance.

1. Automatic Dual Power Transfer

The ATSE Series automatically detects utility power failure or instability and transfers loads to the standby source within ≤1 second, minimizing disruption to critical systems.

  • Configurable transfer and return delays allow coordination with generators, UPS systems, and sensitive electrical loads

  • Supports fully automatic operation or manual control depending on project requirements

  • Compatible with generator auto-start logic and power restoration sequencing

2. High Reliability & Operational Safety

Safety is a core design principle of the ATSE Series.

  • Mechanical and electrical interlocking prevents simultaneous connection of both power sources, eliminating the risk of backeckfeed or parallel operation

  • Clearly visible position indicators (I / 0 / II) provide immediate confirmation of switch status

  • Mechanical padlocking options allow safe isolation during maintenance or emergency shutdown

  • Rated for AC 660V and below, with robust short-circuit withstand capability suitable for industrial environments

3. Flexible System Integration

The ATSE Series supports a wide range of control architectures.

  • Deep integration with generator controllers such as SmartGen, DSE, ComAp, and DEIF for coordinated auto-start, transfer, and fault protection

  • Standalone operation for simple dual-power switching where generator communication is not required

  • Multiple I/O interfaces support integration with PLC, SCADA, and building management systems (BMS)

  • Compatible with generator and load ratings from 20A to 3200A, covering small standby systems to large industrial installations

4. Rugged Design for Harsh Operating Conditions

The ATSE Series is designed for stable operation in demanding environments.

  • Operating temperature range from -20°C to +60°C, with customization available for extreme climates

  • Rated for installation at altitudes up to 2000 meters without derating

  • High electromagnetic compatibility (EMC) ensures reliable performance in industrial, marine, and electrically noisy environments

  • Robust enclosure and horizontal pull-out mechanism allow inspection and servicing without disturbing fixed power connections

5. Intelligent Control & Monitoring

Advanced digital or microcontroller-based logic enables intelligent power management functions, including:

  • Automatic load transfer and return

  • User-defined main power priority selection

  • Real-time status monitoring and fault indication

  • Interface capability with generator controllers for coordinated auto-start, load transfer, and protection logic

These features allow the ATSE Series to operate as part of an integrated generator power system rather than a standalone switching device.

6. Installation & Maintenance Friendly Design

The ATSE Series is designed to simplify on-site installation and long-term maintenance.

  • Compact modular construction suitable for rack-mounted, wall-mounted, or floor-mounted installation

  • Clearly labeled terminals for power inputs, outputs, control signals, and status feedback

  • Standardized wiring interfaces reduce installation time and minimize wiring errors

  • Clear installation schematics and connection diagrams support efficient commissioning by professional electricians

7. Key Benefits for End Users

  • Uninterrupted Power Supply – Maintains operation of critical loads such as emergency lighting, medical equipment, communication systems, and data servers

  • Operational Safety – Mechanical and electrical interlocks reduce the risk of human error and unsafe switching conditions

  • Deployment Flexibility – Suitable for use with utility power, generators, batteries, or hybrid power systems

  • Reduced Lifecycle Cost – Rugged construction and accessible components simplify maintenance and extend service life

Technical Highlights

Feature Specification / Notes
Rated Voltage AC 660V and below
Rated Frequency 50Hz (60Hz optional)
Rated Current 20A – 3200A
Transfer Time ≤1s (adjustable)
Control Compatibility DSE / ComAp / DEIF / SmartGen
I/O Interface Remote start, fault signals, status feedback
Installation Rack, wall, or floor mount
Environmental -20°C to +60°C, up to 2000m altitude, Pollution Level III

Engineering Summary

The Enerzip® ATSE Series Automatic Transfer Switches provide a standards-compliant, industrial-grade solution for automatic load transfer in generator-based power systems. With fast switching performance, flexible integration options, and robust environmental adaptability, the ATSE Series is engineered to ensure continuity, safety, and long-term reliability wherever uninterrupted power is required.

In large-scale or mission-critical power systems, the ATS is commonly integrated with an Intelligent Paralleling & Grid-Connect System to coordinate multiple generator sets and ensure seamless load management.

Rated Current (A)Rated Insulation Voltage (V)Rated Impulse Withstand Voltage (kV)Rated Operational Voltage (V AC)Rated Working CurrentRated Making CapacityRated Breaking CapacityRated Conditional Short-Circuit Current (kA)Rated Short-Time Withstand Current (kA)Transfer Time
8075084408010Ie8Ie1007≤0.45s
100750844010010Ie8Ie1007≤0.45s
125750844012510Ie8Ie1007≤0.45s
160750844016010Ie8Ie1009≤3s (YC type)
250750844025010Ie8Ie1009≤3.5s (YC type)
40010001244040010Ie8Ie7013≤0.6s
63010001244063010Ie8Ie10050≤1.2s
80010001244080010Ie8Ie8055≤1.4s
1000100012440100010Ie8Ie10050≤1.2s
1250100012440125010Ie8Ie10055≤1.4s
1600100012440160010Ie8Ie10055≤1.4s
2000100012440200010Ie8Ie10055≤1.4s
2500100012440250010Ie8Ie10055≤1.4s
3200100012440320010Ie8Ie10055≤1.4s

Additional Information:

Control Voltage: Standard AC 220V, optional AC 110V / AC 380V / DC 12V / DC 24V

Standards Compliance: IEC947-6-1 / GB 14048.11

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Applications

Applications – Enerzip® ATSE Series Automatic Transfer Switch (ATS)

The Enerzip® ATSE Series Automatic Transfer Switch (ATS) is designed for power systems where continuity, safety, and controlled switching are essential. It is widely applied across commercial, industrial, institutional, and infrastructure sectors to ensure reliable transfer between utility and backup power sources, such as diesel generators or battery-supported systems.

1. Commercial Buildings & High-Rise Facilities

Typical Applications:
Office towers, shopping malls, hotels, financial institutions, mixed-use developments.

Critical Loads:
Emergency lighting, elevators, fire pumps, access control, HVAC systems, security monitoring.

Operational Value:
In high-rise buildings, power loss can immediately create safety risks and operational disruption. The ATSE Series transfers loads within ≤1 second, ensuring emergency systems remain operational and allowing building management systems to function normally during outages.

Engineering Advantage:
Mechanical and electrical interlocking prevents unsafe switching conditions, while adjustable delay settings allow coordination with generators and fire protection systems.

2. Data Centers & Telecommunications Facilities

Typical Applications:
Data centers, server rooms, telecom base stations, network core facilities.

Critical Loads:
Servers, storage systems, routers, switches, cooling equipment.

Operational Value:
Even brief power interruptions can cause data corruption, service downtime, and financial loss. The ATSE Series works in conjunction with generators and UPS systems to provide seamless power transfer, protecting sensitive IT infrastructure.

Engineering Advantage:
Supports integration with generator controllers and monitoring systems, enabling coordinated auto-start, transfer logic, and remote status supervision.

3. Healthcare & Medical Facilities

Typical Applications:
Hospitals, emergency departments, laboratories, operating theaters, diagnostic centers.

Critical Loads:
Life-support equipment, surgical lighting, ventilators, patient monitoring systems.

Operational Value:
Healthcare facilities are classified as critical-load environments where power interruption may directly endanger lives. The ATSE Series ensures fast, reliable switching and stable operation during utility failures.

Engineering Advantage:
Dual interlocking mechanisms and clearly defined switch positions enhance operational safety during both emergency operation and scheduled maintenance.

4. Industrial & Manufacturing Facilities

Typical Applications:
Factories, production lines, chemical plants, mines, processing facilities.

Critical Loads:
Industrial machinery, robotic systems, conveyors, control panels, safety systems.

Operational Value:
Unexpected power loss can lead to production stoppages, material waste, and equipment damage. The ATSE Series minimizes downtime by ensuring automatic and controlled power transfer during outages or grid instability.

Engineering Advantage:
High short-circuit withstand capability and rugged design support reliable operation in electrically noisy and mechanically demanding environments.

5. Government, Military & Critical Infrastructure

Typical Applications:
Government buildings, military bases, ports, airports, substations, remote facilities.

Critical Loads:
Communication systems, navigation aids, security monitoring, emergency lighting.

Operational Value:
Continuous power is essential for public safety, national security, and operational readiness. The ATSE Series provides dependable switching performance under harsh environmental and operational conditions.

Engineering Advantage:
Wide environmental tolerance (-20°C to +60°C) and compatibility with centralized monitoring systems support reliable deployment in both urban and remote locations.

6. Power Systems & Generation Facilities

Typical Applications:
Power plants, substations, auxiliary power systems, distribution centers.

Critical Loads:
Auxiliary power supplies, control systems, protection relays, monitoring equipment.

Operational Value:
ATS plays a key role in maintaining stability of power systems during grid disturbances, generator maintenance, or emergency conditions. The ATSE Series enables smooth transition between primary and backup sources without interrupting critical control functions.

Engineering Advantage:
Supports scheduled maintenance and emergency switching scenarios while maintaining system integrity and operational safety.

Core Application Advantages of the ATSE Series

  • Fast and Controlled Transfer – Main switch transfer time ≤1 second, with configurable logic

  • Multi-Power Compatibility – Supports utility, generator, battery, and hybrid power systems

  • Industrial Reliability – Mechanical life exceeding 10,000 operations, AC-33ib usage category

  • Standards Compliance – IEC 60947-6-1 / GB 14048.11

  • Environmental Adaptability – Reliable operation across wide temperature and altitude ranges

  • System Integration Ready – Supports PLC, SCADA, and generator controller communication

Application Summary

The Enerzip® ATSE Series Automatic Transfer Switch is suitable for any application where uninterrupted power is critical to safety, operations, or asset protection. From commercial buildings and hospitals to industrial plants, data centers, and infrastructure projects, the ATSE Series delivers fast, secure, and reliable power transfer as part of a complete generator-based power system.

FAQ

The Enerzip® ATSE Series is designed as an Open Transition (Break-before-Make) automatic transfer switch, which is the industry-standard solution for generator-based standby and emergency power systems. This transfer method introduces a very brief interruption (typically milliseconds) during switching, which is acceptable for most commercial, industrial, and infrastructure applications. It avoids parallel connection between utility and generator sources, ensuring compliance with electrical safety regulations and simplifying system design without the need for source synchronization.
Yes. The ATSE Series supports both integrated and standalone operation. It can work directly with generator controllers such as SmartGen, DSE, ComAp, or DEIF for automatic start, transfer, and shutdown logic, or it can operate independently as a dual-power transfer device using internal sensing and control. This flexibility allows the ATS to be used in simple backup systems as well as in complex generator-based power solutions with centralized control.
When selecting an ATS, the short-circuit withstand and closing capability must exceed the available fault current from both the utility supply and the generator. The ATSE Series is designed for industrial-grade applications and rated for AC 660V systems with high short-time withstand capability. Proper coordination with upstream circuit breakers is essential to ensure the ATS can safely withstand and interrupt fault conditions without mechanical or thermal damage.
Yes. The ATSE Series is designed for reliable operation in demanding environments, with a standard operating temperature range of -20°C to +60°C and altitude up to 2000 meters without derating. The switch features robust mechanical construction, high electromagnetic compatibility, and industrial-grade insulation, making it suitable for use in factories, power plants, ports, outdoor substations, and other harsh operating conditions.
The ATSE Series supports remote monitoring and system integration through multiple I/O interfaces. It can be connected to PLC, SCADA, or building management systems (BMS) for status feedback, alarm signaling, and operational monitoring. When used with compatible generator controllers, the ATS can also provide real-time information on power source status, transfer position, and fault conditions, enabling centralized management of critical power systems.
For critical installations, the ATSE Series can be configured with maintenance-friendly features such as clear position indicators, mechanical locking, and safe isolation mechanisms. These allow technicians to inspect or service the switch safely. In systems where uninterrupted power is mandatory, the ATS is commonly paired with external bypass or isolation arrangements, enabling maintenance activities without disconnecting power to essential loads.

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