New Product Launch | Midas Electric Introduces MDS9 Series Automatic Power Transfer System

Midas Electric Launches the MDS9 Series Automatic Power Transfer System (APTS)

The MDS9 Series Automatic Power Transfer System (APTS) by Midas Electric is specifically engineered for multi-source power supply systems, offering seamless transfer control and power protection. It supports CB-level transfer with integrated short-circuit and overload protection. In the low-voltage transfer sector, its actuator provides a reliable solution. The GridPro series switches integrate real-time temperature monitoring of critical components in the main circuit, contact wear analysis, and comprehensive switch status monitoring. These insights can be transmitted to the ME-iPOWER system, enabling multidimensional monitoring of the entire transfer system.

The APTS features multiple redundancies and interlock mechanisms to ensure safe operation, including system logic interlocks, electrical interlocks, and both flexible and rigid mechanical interlocks in the actuator. The APTS also supports various power input schemes based on user needs, including traditional dual power input, “dual input with bus tie,” and three-source configurations.

Controller Features

• Supports multiple control logics: standard, delayed, parallel, standard bypass, delayed bypass, and parallel bypass types.

• Programmable I/O ports: 21 DI and 11 DO, tailored for various application scenarios.

• Built-in real-time self-diagnostic function ensures system health and timely fault alarms.

• 7-inch full-color touch screen with parameter display, settings, control, and event logs.

• Standard RS485 communication interface with Modbus RTU protocol; optional Ethernet interface with Modbus TCP protocol for seamless integration with power monitoring systems.

• No additional control power supply required; includes optional third-channel control power input.

• Isolation between processor/digital circuits and the primary circuit.

• Real-time monitoring of both power sources' voltage and frequency; optional load current monitoring.

• Generator start/stop control and scheduled test features included.

Product Configurations

MDS9S – Withdrawable Standard ATS
Ideal for general and mixed loads; the withdrawable design allows easy maintenance.

MDS9D – Withdrawable Delayed ATS
More suited for motor-heavy or transformer loads; withdrawable structure simplifies servicing.

MDS9C – Withdrawable Instant Parallel ATS
Designed for critical loads in grid-generator applications. Enables 100 ms parallel operation between two sources for smooth switching.

MDS9BS – Bypass Standard ATS
Ensures power continuity during maintenance of the main ATS unit using the bypass switch.

MDS9BD – Bypass Delayed ATS
Optimized for motor or transformer loads with bypass functionality for maintenance continuity.

MDS9BC – Bypass Instant Parallel ATS
Supports 100 ms parallel operation for seamless transfer, suitable for mission-critical applications such as grid-generator systems.

Key Features & Advantages

• Withdrawable design for convenient maintenance.

• Load utilization category: AC-33A for mixed loads.

• Transfer action time: <100 ms.

• Neutral conductor rated equal to phase conductor with independent arc chamber.

• Dual mechanical interlock.

• Multiple electrical interlocks.

• Excellent short-time withstand and making capacity.

• Multiple operating modes: Auto Return, Mutual Standby, Auto Manual Return, Manual, Remote Signal, and Test.

• Multiple control methods: Automatic, Motor-driven, Manual Mechanical.

MDS9B Series Overview

• Composed of two main modules: ATS and bypass switch.

• Bypass unit equipped with a mechanically identical MDS9-series switch.

• Smooth switchover between main and bypass units.

• Mechanical interlock prevents misoperation during bypass or main unit re-engagement.

Technical Specifications & Certifications

• Temperature rise tested per GB/T 14048.11-2016 after making and breaking/short-circuit tests.

• Certified per GB/T 14048.11-2016 standard.

• Controller certified under CQC1127-2017 electronic controller standard for automatic transfer switches.

• CE compliant, meets IEC60947-6-1.

• 1000 ms short-time withstand capacity.

• Manufactured in ISO9001 certified facility.

Product Range

• Rated Current: 200A to 4000A

• Rated Voltage: 120V to 600V

• Number of Poles: 2-pole / 3-pole / 4-pole

• Frequency: 50Hz / 60Hz

• Application Scenarios: Grid-to-Grid, Grid-to-Generator, Generator-to-Generator