Automatic Transfer Switch
The MDS3 Series Automatic Transfer Switch adopts a DC coil drive and is widely applied in critical end-use loads across various industries, such as commercial buildings, hotels, shopping centers, fire protection, hospitals, paper manufacturing, metallurgy, petrochemicals, airports, highways, railways, and subways. The MDS3 Series is dedicated to providing simple and compact solutions to ensure smooth switching between end power sources.
Controller Features:
No additional control power supply required
Processor and digital circuits are isolated from the primary circuit
Programmable I/O ports to meet customer application needs
Real-time monitoring of three-phase voltage and frequency of both power sources
Real-time monitoring of various ATS parameters and statuses
Large LCD display (128x64) for real-time display of power sources and ATS parameters/status
Electrical parameters, time delays, and control functions can be freely set via the LCD panel
Event logging and data statistics functions
RS485 communication interface; supports Modbus RTU protocol for integration with power monitoring and fire control systems
Generator start/stop and scheduled test functions
Real-time self-diagnosis
Features and Advantages:
Load utilization category: AC-33A, suitable for mixed loads
Switching action time <100ms
Mechanical latching with built-in mechanical interlock
Neutral line capacity equal to phase line capacity; equipped with independent arc-extinguishing chamber
Excellent short-time withstand current and making capacity
Available in 2-position and 3-position versions; the 3-position includes an intermediate “0” position for isolation
Multiple operation modes: auto-transfer auto-recovery / mutual standby / auto-transfer manual recovery / manual / remote signaling / test
Multiple switching modes: automatic / electric / manual mechanical switching
Supports fire protection interlock features including “no-switching” during fire, fire isolation, and remote fire control
Product Range:
Rated current: 16A–3200A
Rated voltage: 208V / 220V / 230V / 240V / 380V / 400V / 415V
Poles: 2-pole / 3-pole / 4-pole
Frequency: 50Hz / 60Hz
Applicable for: Utility-to-Utility, Utility-to-Generator scenarios
