中文
Wifi Ats 125A, Automatic Transfer Switch 2P 3P 4P LMQ4-125W
LMS1-GA series Automtic transfer Switch Ats 100A
LMS1-NJT Series Automatic Transfer Switch Ats 63A
LMS1-MA Type PC Class Automatic Transfer Switch Ats 63A
Ats 100A,Automatic Transfer Switch 2P 3P 4P LMQ4-100X
LMS1-LA Series Automatic Transfer Switch ATS 100A
LMS1-GN Automatic Transfer Switch ATS 250A
LMS1-NA Series Automatic Transfer Switch ATS 630A
LMS1-LA3 Series PC Automatic transfer switch Ats 630A
LMS1-L Series Automatic Transfer Switch Ats 630A
LMS1-SA Series PC Automatic transfer switch
LMS1-SN Series Automatic Transfer Switch Ats 400A
LMS1-Q Type Automatic Transfer Switch Ats 3200A
LMS1-SN Automatic Transfer Switch Ats
LMS1-J Series Automatic Transfer Switch Ats 63A
LMQ2Y Series Automatic Transfer Switch CB Class
LMQ2CB Series Automatic Transfer Switch
LMQ3-W1 Automatic Transfor Switch Ats 63A
LMQ3-W1 Automatic Transfor Switch ats 630A
LMQ4-63M 63A Automtic transfer Switch 2P 3P 4P
LMGLZ1 Manual Transfer Switch (100~630A)
LMGLZ Manual Transfer Switch (100~630A) Changeover Switch
Y-700 Automatic Transfer Switch Controller
Y-701 Automatic transfer switch controller
W2、W3 Automatic Transfer Switch Plug-In Led Digital Controller
Customization-Automatic Transfer Switch Cabinet 100A Ats
Dual Power Supply Control Cabinet - Automatic Transfer Switch
Ats Cabinet - Automatic Transfer Switch
0102030405
China Y-701 Automatic Transfer Switch Controller - Reliable Suppliers & Factory Solutions for Your Power Needs
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 Y-701/Y-702 series is an advanced dual power system controller with excellent compatibility for our full range of products. The series integrates microprocessor measurement unit and programmable output unit, in which Y-702 is equipped with communication unit to further expand the functional boundary.
For display, Y-701 uses traditional display, Y-702 is upgraded to LED display to meet the diverse needs of different users for display interface.
This series of controllers have a very practical adjustable switching delay function, and have a variety of adjustable working modes, which can be flexibly adapted to various complex power consumption scenarios. It is worth mentioning that the series is equipped with intelligent power module, greatly reducing the risk of human operation, for the stable operation of the system to build a strong security line.
The microprocessor-based Y-701/Y-702 series controllers have extremely high circuit sensitivity and can accurately capture subtle changes in the circuit such as over-voltage, under-voltage, and phase loss, and quickly output passive switch vector signal to ensure the efficient and stable operation of the dual power supply system, and provide a solid guarantee for the reliable power supply of all kinds of electrical equipment.
Model Description
ATTENTION
1. Controller is equipped with the cable while out of factory. Cable should be correctly connected — refer to the mark A/B/C/N.
2. FU1/FU2 are normal power and standby power insurance tubes. The value will change depending on ATS model:
• While equipped with GA type ATS: FU1/FU2 = 2A
• While equipped with C, N, S type ATS: FU1/FU2 = 10A
• While equipped with N, Q type ATS: FU1/FU2 = 16A
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 | □ | ■ |
Structure and Mounting Dimensions
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: 9600 bps
Data bit: 8 | Parity bit: None | Stop bit: 1
| M3 | M4 | L2 | A2 | A2 | B2 | C2 | N2 | T2 | T1 | F2 | F1 | F | N1 | C1 | B1 | A1 | A1 | L1 | M2 | M1 |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
- 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 depending on ATS model. When equipped with PC class three-section ATS, it is 220VAC active output; 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.
Frequently Asked Questions
What is the difference between the Y-701 and Y-702 controllers?
The Y-701 uses a traditional indicator light display and does not include RS485 communication or programmable output. The Y-702 upgrades to an LED display and adds RS485 communication functionality and programmable output, making it suitable for more advanced monitoring and automation requirements.
What types of ATS are compatible with the Y-701/Y-702 series controllers?
The Y-701/Y-702 series is designed with excellent compatibility across a full range of ATS products, including GA type, C/N/S type, and N/Q type ATS. The FU1/FU2 fuse values should be set accordingly: 2A for GA type, 10A for C/N/S type, and 16A for N/Q type.
What communication protocol does the Y-702 support?
The Y-702 supports RS485 communication using the following parameters: Local host address 1 (adjustable from 1–32), baud rate 9600 bps, data bit 8, parity bit none, and stop bit 1. This allows integration with SCADA systems or remote monitoring platforms.
How does the generator auto-start function work on these controllers?
Both Y-701 and Y-702 support generator auto-start functionality. When a fault is detected on the normal power supply (such as over-voltage, under-voltage, or phase loss), the controller automatically triggers the generator start signal via terminals F1 and F, enabling seamless switchover to standby power without manual intervention.
What types of fault detection does the Y-701/Y-702 series support?
The controllers support four-phase lacking phase detection as well as three-phase over-voltage and under-voltage detection for both normal and standby power supplies. The high-sensitivity microprocessor ensures rapid response to subtle circuit changes, protecting connected electrical equipment from damage.
Can the switching delay and working mode be customized on the Y-701/Y-702?
Yes. Both models feature an adjustable switching delay function and multiple selectable working modes. This flexibility allows the controllers to be adapted to a wide range of complex power consumption scenarios, from commercial buildings to industrial applications, ensuring reliable and efficient dual power supply management.