Automatic Transfer Switch
The MDS7 Series Automatic Transfer Switches are designed to meet the demands of larger power distribution capacities and more complex applications, with a maximum rated current of 4000A. Suitable for use at the power source side (U-U or U-G), distribution end, and critical terminal load switching scenarios, the MDS7 series adopts motor pre-energization and coil excitation drive mechanisms. The switch body features dual mechanical interlocks, and is equipped with the MC700 controller and LCD touchscreen interface, ensuring more accurate dual power source switching. The MDS7 series offers a wide range of current, voltage, and pole configurations, along with multiple optional features to meet diverse application needs.
Controller Features:
Supports various automatic transfer switch control logics such as standard type, delayed type, and parallel type.
21 DI and 11 DO programmable I/O ports to meet diverse application requirements.
Real-time self-diagnosis with continuous internal scanning to ensure healthy operation and timely fault alarms for modules and the ATS.
7-inch color LCD touchscreen control panel with rich features for parameter display, settings, control, and event logging.
Standard RS485 communication interface supporting Modbus RTU protocol.
No external control power required, with an additional auxiliary third control power input option.
Processor and digital circuits are electrically isolated from the primary circuit.
Real-time monitoring of three-phase voltage and frequency for both power sources; optional load current monitoring available.
Supports generator start/stop and periodic generator test functionalities.
Features & Advantages:
Load utilization category: AC-33A, suitable for mixed loads.
Transfer operation time < 100 ms.
Neutral conductor rated for the same capacity as phase conductors, equipped with independent arc extinguishing chamber.
Dual mechanical interlocks.
Multiple electrical interlocks.
Excellent short-time withstand current and making capacity.
Multiple operating modes: Automatic transfer with automatic retransfer / Mutual standby / Automatic transfer with manual retransfer / Manual / Remote signal / Test.
Multiple operation modes: Automatic transfer / Electrical transfer / Manual mechanical transfer.
Technical Specifications / Certifications:
Passed temperature rise test after making/breaking and short-circuit tests per GB/T 14048.11-2016.
Certified to GB/T 14048.11-2016.
Complies with IEC 60947-6-1, CE certified.
1000 ms short-time withstand capacity.
Manufactured under ISO9001 certification.
Product Range:
Rated current: 40A ~ 4000A
Rated voltage: 120V ~ 600V
Poles: 2-pole / 3-pole / 4-pole
Frequency: 50Hz / 60Hz
Applicable configurations: Utility-to-Utility, Utility-to-Generator, Generator-to-Generator
