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China LMS1-NA Series 125A Automatic Transfer Switch ATS - Reliable Dual Power Solutions from Trusted Suppliers and Factory
LMS1-LA Series Manual
LMS1-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.
LMS1-NA Series Auto Transfer Switch is mainly used for electric distribution networks or motor networks with a rated voltage of 380V, 50Hz, and rated current from 16A to 630A. It enables seamless transfer between main power and backup power systems, including power grid to power grid and power grid to genset applications.
Model Description
Main Technical Parameters
| Rated working current | 16/20/25/32A | 32/40/50/63/80/100/125A | 160/180/200/250A | 250/315/350/400A | 500/630A | |
| Rated control power supply voltage (V) | AC220V | AC220V | AC220V | AC220V | AC220V | |
| Rated control supply current (A) | 3.5 | 3.5 | 7 | 7 | 7 | |
| Rated short-time withstand current (KA) | 10 | 10 | 10 | 10 | 10 | |
| Service life | Mechanical | 20000 | 20000 | 20000 | 20000 | 20000 |
| Electrical | 6000 | 6000 | 6000 | 6000 | 6000 | |
| Operating cycle (1 minute / times) | 10 | 10 | 12 | 15 | 15 | |
a: Power grids to Power grids b: Power grids to Generator
① NA — Neutral terminal of normal power for 3-pole ATS
② LP1 — Normal Power supply indicator light
③ LP2 — Normal Power indicator light
④ LP3 — Standby Power indicator light
⑤ LP4 — Standby Power supply indicator light
⑥ NB — Neutral terminal of standby power for 3-pole ATS
Structure and Mounting Dimensions
Production Process
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Frequently Asked Questions
Q What is the rated voltage and current range of the LMS1-NA Series ATS?
The LMS1-NA Series Automatic Transfer Switch is designed for systems with a rated voltage of 380V at 50Hz. It covers a wide current range from 16A to 630A, making it suitable for both small distribution panels and large industrial power systems.
Q What types of power transfer scenarios does the LMS1-NA support?
The LMS1-NA ATS supports two main transfer scenarios: power grid to power grid (a) and power grid to generator (b). This flexibility makes it ideal for facilities requiring uninterrupted power supply from multiple sources.
Q What is the mechanical and electrical service life of this transfer switch?
The LMS1-NA Series ATS offers a mechanical service life of up to 20,000 operations and an electrical service life of 6,000 operations across all current ratings, ensuring long-term reliability in demanding environments.
Q What is the rated control power supply voltage for the LMS1-NA ATS?
All current variants of the LMS1-NA Series use AC220V as the rated control power supply voltage. The control supply current is 3.5A for models up to 125A, and 7A for models from 160A to 630A.
Q What do the indicator lights (LP1–LP4) on the LMS1-NA ATS represent?
The indicator lights provide clear visual status information: LP1 indicates normal power supply status, LP2 shows normal power availability, LP3 signals standby power availability, and LP4 confirms standby power supply status — allowing operators to monitor transfer status at a glance.
Q What is the rated short-time withstand current of the LMS1-NA Series?
The LMS1-NA Series ATS has a rated short-time withstand current of 10KA across all current ratings (16A to 630A), providing robust protection against short-circuit conditions in distribution and motor networks.