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LMS2-63~250GN1 PC ATS: Top China Factory Suppliers for Reliable Power Transfer Solutions
LMS1-LA Series ManualLMS1-LA as our ingenuity research and development of a new generation of dual power automatic transfer switch, in the performance and technology to achieve a major breakthrough. The product provides 63A, 125A, 250A, 400A, 630A and other rated current specifications, whether it is the continuous operation of massive servers in data centers, or the uninterrupted power supply of life support equipment in hospital ICU wards, the stable operation of elevator and fire fighting system in high-rise buildings can fully meet the power demand in different scenarios.
Its switching speed can be called industry-leading, switching time only 10ms-50ms, with millisecond response speed to complete power conversion. In the data center, the LMS1-LA automatic transfer switch can switch to the standby power supply in a very short period of time in the face of sudden power failure, avoiding data loss and system collapse caused by momentary power failure; in the hospital environment, the LMS1-LA automatic transfer switch can switch to the standby power supply in a very short period of time, millisecond-level power switching can guarantee the stable operation of precision instruments and first-aid equipment in operating rooms, and escort the safety of patients. When applied to high-rise buildings, fast power changeover ensures smooth parking of elevators, normal operation of fire fighting systems and improved building Factor of safety.
The transfer switch is composed of a high performance excitation contactor and an intelligent controller. When working, the electromagnetic coil produces a strong and stable attraction to drive the switching action to ensure the instant completion of power switching. This feature not only effectively guarantees the rapid switching of the power supply when the equipment is powered off, but also realizes the seamless connection of the power supply, which provides a reliable and solid power guarantee for the equipment with strict requirements for power continuity.
Model Description
Main Technical Parameters
| Frame Class | 63 | 125 | 250 | |||||||||||
| Rated Current Ie (A) | 16 | 20 | 25 | 32 | 40 | 50 | 63 | 80 | 100 | 125 | 160 | 200 | 225 | 250 |
| Rated Insulation Voltage | 690V | 800V | ||||||||||||
| Rated Impulse Withstand Voltage | 8kV | |||||||||||||
| Rated Working Voltage | 400V 50Hz | |||||||||||||
| Using Category | AC-33iB | |||||||||||||
| Rated Short-Circuit Making Capacity | 7.65kA | 17kA | ||||||||||||
| Rated Short-Time Withstand Current | 5kA / 30ms | 10kA / 30ms | 10kA / 60ms | |||||||||||
| Transfer Time | ≤ 2s | ≤ 2.5s | ||||||||||||
IMS2-GN1 Type ATS Wiring Diagram
Outline and Installation Dimensions

Frequently Asked Questions (FAQ)
Q
What is the rated working voltage of the IMS2-GN1 ATS?
The IMS2-GN1 ATS has a rated working voltage of 400V at 50Hz, making it suitable for standard industrial and commercial power distribution systems.
Q
What are the available current ratings for the IMS2-GN1 ATS?
The IMS2-GN1 ATS is available in rated current values of 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, 100A, 125A, 160A, 200A, 225A, and 250A, covering Frame Classes 63, 125, and 250.
Q
What is the transfer time of the IMS2-GN1 ATS?
The transfer time is ≤ 2 seconds for Frame Classes 63 and 125 (up to 125A), and ≤ 2.5 seconds for Frame Class 250 (160A–250A), ensuring fast and reliable source switching.
Q
What is the rated impulse withstand voltage of this ATS?
The rated impulse withstand voltage for all frame classes of the IMS2-GN1 ATS is 8kV, providing strong protection against voltage surges and transients.
Q
What is the using category of the IMS2-GN1 ATS?
The IMS2-GN1 ATS is classified under using category AC-33iB, which is designed for switching of motor loads and other inductive loads in AC power systems.
Q
What is the rated short-circuit making capacity for Frame Class 250?
For Frame Class 250 (160A–250A), the rated short-circuit making capacity is 17kA, while Frame Class 63 supports 7.65kA, ensuring reliable performance under fault conditions.





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