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0102030405
Y-702 Automatic Transfer Switch Controller from China Suppliers and Factory - AC220V, Modbus Protocol, Adjustable Switching Time
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.
The Dual Power Automatic Transfer Switch Controller is a dual power supply system for the design of intelligent control equipment, designed to ensure that in the complex and changeable power environment, load can be sustained, stable and reliable power supply. Through the comprehensive monitoring of the two power supplies, it can accurately judge the status of the power supply, and quickly switch the power supply according to the preset logic, which effectively solves the problem of power interruption caused by power failure, widely used in hospitals, data centers, financial institutions, industrial production and other areas of high demand for power supply continuity.
Functional characteristics
Precise power supply monitoring
- Voltage Monitoring: Real-time, accurate measurement of two power supply voltage values, with customizable over-voltage and under-voltage thresholds. For example, for 220V mains, it can accurately identify voltage higher than 242V (overvoltage) or lower than 198V (undervoltage) abnormal situations.
- Frequency monitoring: Strictly tracks the frequency of the power supply to ensure stability within the range of 50 Hz ± 0.5 Hz, protecting frequency-sensitive equipment.
- Phase Monitoring: In three-phase systems, it monitors the 120° phase difference, timely detecting anomalies such as excessive phase deviation or incorrect phase sequence.
Intelligent switching control
- Automatic switching: Quickly switches load to standby power within milliseconds to seconds upon detecting faults like over-voltage, under-voltage, phase loss, or abnormal frequency.
- Manual switching: Operators can switch power supplies manually via the controller panel buttons or remote commands.
- Flexible switching logic: Custom priority settings for main and standby power. Includes a switching delay function (adjustable 0.5-5s) to prevent false switching from transient fluctuations.
- Multiple alarm prompts: Triggers sound and light alarms for fault localization (over-voltage, under-voltage, phase lack, frequency issues).
- Convenient communication: Equipped with RS485/Ethernet interfaces for remote monitoring, operations, and data transmission.
Main Technical Parameters
| Products model number | Y-701 | Y-702 |
|---|---|---|
| Installation method | Fission type | |
| Display mode | Indicator light | LED |
| Rated duty | Uninterrupted duty | |
| Self-input and self restore | ■ | ■ |
| Normal port and standby port share to each other | ■ | ■ |
| Generator auto-start function | ■ | ■ |
| Normal power detect | ■ | ■ |
| Standby power detect | Four-phase lacking phase detection, three-phase over-voltage/under-voltage detection | |
| Passive fire protection input | Four-phase lacking phase detection, three-phase over-voltage/under-voltage detection | |
| (dc9-36v) active fire protection input | ■ | ■ |
| Active fire control input | ■ | ■ |
| Voltage real-time display | ■ | ■ |
| Normal power and standby power indication | □ | ■ |
| Normal power and standby power | ■ | ■ |
| Over-voltage/under-voltage adjustable | ■ | ■ (F/F1) |
| Generator rev. Stop time adjustable | ■ | ■ |
| Programmable output | □ | ■ |
| Rs485 communicating function | □ | ■ |
Product features
Y-701/702 FUNCTION OF EACH TERMINAL
| R- | R+ | GND | R1 | 485B (-) | 485A (+) | EGND |
- □ R- & R+: DC9V-36V active fire control input enabled
- □ GND & R1: short circuit, passive fire control unit enabled
- □ 485A & 485B: RS485 communication terminal, EGND: Frame Ground
Communication protocol parameters:
Local host: 1 (1-32, can be modified) | Baud rate: 9600bps | Data bit: 8 | Parity bit: none | Stop bit: 1
Local host: 1 (1-32, can be modified) | Baud rate: 9600bps | Data bit: 8 | Parity bit: none | Stop bit: 1
□ M3, M4: Standby power passive closing auxiliary output. Outputting time depends on ATS Model; about 3 seconds within magnet exciting coil, Electric type ATS can be more than 10 seconds.
□ L2: Standby power active closing feedback input, only limited to phase A/B/C.
□ A2: Standby power phase A output, feedback to the closing standby power.
□ A2, B2, C2, N2: Standby power three-phase & four-wire input.
□ T1, T2: All off signal output, can be active or passive depends on ATS model. When equipped with PC class three sections ATS, it is 220AC active output, and it is passive when equipped with seclusion type ATS.
□ F2, F1, F: In Y-701 controller, F1 and F are starting generator signal output; in Y-702 controller, F1 and F are programmable output.
□ A1, B1, C1, N1: Normal power three-phase & four-wire input.
□ A1: A phase normal output, feedback to closing normal power.
□ L1: Normal power active closing feedback input, only limited to phase A/B/C.
□ M1, M2: Normal power passive closing auxiliary output, outputting time refers to M3 & M4.
Product dimensions
Frequently Asked Questions (FAQ)
What is the main purpose of the Dual Power Automatic Transfer Switch Controller?
It is designed to monitor two power supplies and automatically switch the load to the standby power source in case of power failures, ensuring continuous, stable, and reliable power supply.
What parameters does the controller monitor to detect power faults?
The controller tracks voltage (detecting over-voltage and under-voltage), frequency stability (targeting 50 Hz ± 0.5 Hz), and phase difference (monitoring the 120° difference in three-phase systems).
What is the difference between the Y-701 and Y-702 models?
The Y-701 uses indicator lights for display and does not support RS485 communication or programmable output. The Y-702 features an LED display, supports RS485 communication, and includes programmable outputs.
Can the switching delay time be adjusted?
Yes, the switching delay time can be flexibly adjusted within 0.5 to 5 seconds to prevent false switching caused by brief, transient power fluctuations.
Does the controller support fire control system integration?
Yes, it features both active fire control input (DC9V-36V enabled via R- & R+) and passive fire control unit input (enabled via short-circuiting GND & R1).
How does the RS485 communication function work on the Y-702?
It operates at a baud rate of 9600bps (data bit: 8, parity: none, stop bit: 1) with an adjustable local host address (1-32), allowing integration with upper monitoring systems for remote control and data transmission.