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Wifi Ats 125A, Automatic Transfer Switch 2P 3P 4P LMQ4-125W
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China Wifi ATS 125A - Automatic Transfer Switch 2P 3P 4P LMQ4-125W from Reliable Suppliers & 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.
Main Technical Parameters
| Model | LMQ4-125W | ||||||||||
| Rated current le A | 10 | 16 | 20 | 25 | 32 | 40 | 50 | 63 | 80 | 100 | 125 |
| Insulation voltage Ui | AC 690V | ||||||||||
| Rated voltage Ue | 2P: AC230V 3P: AC400V 4P: AC400V |
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| Grade | Grade PC: able to make and withstand, not to break short-circuit current | ||||||||||
| Use category | AC-33iB | ||||||||||
| Pole | 2P | 3P | 4P | ||||||||
| Weight (kg) | 0.62 | 0.72 | 0.91 | ||||||||
| Life | Electrical: 2000 times; Mechanical: 5000 times | ||||||||||
| Rated conditional short-circuit current lq | 50kA | ||||||||||
| SCPD (fuse) | RT16-00-63A | ||||||||||
| Rated impulse withstand voltage | 8kV | ||||||||||
| Control circuit | Rated control voltage Us: AC220V, 50Hz — Correct working condition 85%Us–110%Us | ||||||||||
| Auxiliary circuit | AC220V / AC110V 50/60Hz | ||||||||||
| Contact transfer time | <50ms | ||||||||||
| Operating transfer time | <50ms | ||||||||||
| Return transfer time | <50ms | ||||||||||
| Off-time | <50ms | ||||||||||
| Temperature range | -5°C ~ +40°C; average temperature not more than 35°C in 24 hours | ||||||||||
Working Conditions
WiFi ATS — Automatic Transfer Switch 2P 3P 4P 125A LMQ4-125W
Automatically switch between grid and generator (solar, wind or diesel generator).
In the absence of power, the switch automatically switches to the generator (Source B). Once the power is restored, the switch automatically switches back to the grid (Source A).
Characteristics
- Easy to install and operate
- Ultrafast transmission system
- 35 mm DIN rail mount (standard circuit breaker box)
- Switch indicating the source of power supply
- Automatic and manual switches
Technical Specifications
Model Name
LMQ4-125W/4-125A
Operating Voltage
220V
Pole Number
2P, 3P, 4P
Frequency
50–60 Hz
Maximum Load
125A
Transmission Time
8 milliseconds
Life Expectancy
50,000 operations
ATSE Class
PC
Operating Temperature
-5°C ~ +40°C
Circuit Failure
UIMP 8KV
Important Notes
- The switch cannot switch the generator directly.
- When the switch is in the "Automatic" position, the device will automatically switch between normal and standby power.
- If the main power supply is insufficient, the switch will automatically switch to "Standby" mode; once restored to the main power supply, the switch will automatically recover.
- In the manual option, you can change the power supply manually.
Structure and Mounting
Frequently Asked Questions
What is the LMQ4-125W WiFi ATS used for?
The LMQ4-125W WiFi Automatic Transfer Switch (ATS) is designed to automatically switch power between the main grid and a backup generator — such as solar, wind, or diesel — ensuring uninterrupted power supply to connected loads.
What pole configurations are available for this ATS?
The LMQ4-125W is available in 2P (2-pole), 3P (3-pole), and 4P (4-pole) configurations to suit different electrical system requirements. Rated voltages are AC230V for 2P and AC400V for 3P and 4P.
How fast does the LMQ4-125W switch between power sources?
The contact transfer time, operating transfer time, return transfer time, and off-time are all less than 50ms. The transmission time is as fast as 8 milliseconds, making it an ultrafast transfer switch suitable for sensitive loads.
Can the LMQ4-125W be operated manually?
Yes. The switch supports both automatic and manual operation modes. In manual mode, users can manually select the desired power source. In automatic mode, the device handles switching without any user intervention.
What is the rated conditional short-circuit current of this switch?
The LMQ4-125W has a rated conditional short-circuit current (Iq) of 50kA, with an SCPD (fuse) rated at RT16-00-63A and a rated impulse withstand voltage of 8kV, ensuring robust protection in demanding environments.
How is the LMQ4-125W installed?
The LMQ4-125W is designed for easy installation on a standard 35mm DIN rail, making it compatible with standard circuit breaker enclosures. It is straightforward to install and operate, minimizing setup time and complexity.