China ATS 400A Automatic Transfer Switch LMS1-SN - Reliable Suppliers & Factory Options Available

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. ​

LMS1-SN Series PC class dual power Auto transfer switch, mainly used in two way power supply system with rated voltage below 400V, AC 50/60Hz, rated current up to 630A. When one power supply is abnormal, it transfers between two power supply systems to ensure the power supply reliability and safety.

Model Description

⚠ Notice:

1. Separated type ATS can be chosen: Y-701 (LED) or Y-702 (LCD) Controller.

2. ATS without output signal to start generator; Y-701 and Y-702 controller with it.

Working Environment

• 1 Ambient air temperature: Ambient temperature -5℃ to +40℃, and the 24-hour average temperature value does not exceed +35°C. Users whose ambient air temperature is higher than +40°C or lower than -5°C should consult with the manufacturer.
• 2 The highest temperature of atmospheric humidity: When the degree is +40℃, the relative humidity does not exceed 50%, and the maximum relative humidity per month is 90%. Resistant to the influence of humid air on the sea, and can allow higher relative humidity at lower temperatures. Special measures should be taken for the occasional condensation caused by temperature changes.
• 3 Installation altitude: The altitude of the installation site does not exceed 2000 meters. When used at higher altitudes, the dielectric strength and cooling effect of the air should be considered to be reduced; please consult with the manufacturer.
• 4 Pollution level: The environmental pollution level of the installation site is level 3.
• 5 Installation category: IV.
• 6 Installation inclination: The product is fixedly installed in the cabinet; the maximum inclination is ±22.5°.
• 7 Arcing distance: The arcing distance is 30mm when AC 400V. The arcing distance when AC 690V is 60mm.

Main Technical Parameters

Model Name			LMS1-SN
Insulation voltage			AC 690V
Rated voltage			AC 400V
Rated current			20A~125A	160A~250A		315A~630A
Rated impulse withstand voltage			8kV
Kind of throw			Double throw
Wiring method			Front board
Short-time resistance current			10kA
Through to breaking capacity			17kA
Transfer time	A Power	Input	80ms		80ms		100ms
		Break	30ms		30ms		30ms
	B Power	Input	100ms		100ms		120ms
		Break	30ms		30ms		30ms
Electrical Life			1000				1000
Mechanical Life			5000				4000
Use type			AC-33ib
Accessories			Manual handle

Structure and Mounting Dimensions

Frequently Asked Questions (FAQ)

QWhat is the LMS1-SN Series Automatic Transfer Switch used for?

The LMS1-SN Series ATS is a PC class dual power automatic transfer switch designed for two-way power supply systems with a rated voltage below 400V (AC 50/60Hz) and rated current up to 630A. It automatically transfers between two power sources when one supply becomes abnormal, ensuring continuous and reliable power supply.

QWhat is the maximum rated current supported by the LMS1-SN ATS?

The LMS1-SN Series supports a maximum rated current of 630A, with available ranges of 20A–125A, 160A–250A, and 315A–630A to suit different application requirements.

QWhat controllers are available for the separated type ATS?

For the separated type ATS, you can choose either the Y-701 (LED) or Y-702 (LCD) Controller. Note that the standard ATS does not include an output signal to start a generator, but the Y-701 and Y-702 controllers do support this function.

QWhat are the installation altitude limitations for the LMS1-SN ATS?

The LMS1-SN ATS is designed for installation sites with an altitude not exceeding 2000 meters. For installations at higher altitudes, the dielectric strength and cooling effect of the air may be reduced, so it is recommended to consult with the manufacturer before proceeding.

QHow long is the electrical and mechanical service life of the LMS1-SN ATS?

The electrical life of the LMS1-SN ATS is 1000 operations across all current ratings. The mechanical life is 5000 operations for models up to 250A, and 4000 operations for models in the 315A–630A range.

QWhat is the transfer time of the LMS1-SN ATS when switching between power sources?

For Power Source A, the input transfer time is 80ms (100ms for 315A–630A) and the break time is 30ms. For Power Source B, the input transfer time is 100ms (120ms for 315A–630A) and the break time is 30ms, ensuring fast and reliable switching between the two power supplies.