Automatic Transfer Switch using Power Quality Intelligence

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Description

Three Phase Miro Emergency Changeover Unit (ECO ATS) is an advanced automatic transfer switching system designed for critical infrastructure applications where both transfer continuity and detailed power quality visibility are essential.

Unlike conventional ATS systems that simply transfer between Normal and Emergency supplies after complete supply failure, the CHK PQ ECO continuously monitors the electrical network in real time using integrated Miro Power Quality intelligence. The system is capable of detecting voltage dips, brownouts, swells, phase abnormalities, and supply instability conditions before a total outage occurs, allowing faster and more intelligent transfer decisions.

The ECO ATS combines high speed mechanical changeover technology with real time RMS voltage analysis, waveform capture, event recording, and disturbance analytics. This provides operators and engineers with complete visibility into the actual network conditions that triggered the transfer event.

Figure 1: 3 phase ECO-ATS change over waveform

Technical Comparison – Conventional ATS vs Miro ECO-ATS

Feature
Conventional ATS
Miro ECO-ATS
Primary Function
Automatic Transfer Switching
Automatic Transfer Switching + Integrated Power Quality Intelligence
Detection Method
Supply fail detection
Continuous RMS voltage monitoring
Voltage Dip Detection
Limited
Yes
Brownout Detection
Limited
Yes
Swell Detection
Limited
Yes
Detection Time
Limited
Approx. 5–10 ms
RMS Processing
No
Half cycle RMS calculation with one-third cycle updates
Mechanical Contactor Switching Time
Approx. 15–20 ms
Approx. 15–20 ms
Total System Transfer Time
Typically quoted as 15–20 ms
Approx. 20–30 ms including disturbance detection and switching
Transfer Decision Logic
Supply loss only
Configurable Power Quality based switching logic
Single Phase Disturbance Transfer
Limited
Yes
Waveform Capture During Transfer
No
Yes
Event Recording
Basic switching records
Detailed event and disturbance capture
Root Cause Analysis
Limited
Yes
Current Monitoring
No
3 Current Inputs
Voltage Monitoring
Supply presence only
3 Voltage Inputs
Phase Angle Measurement
No
Yes
Power Quality Event Logging
No
Yes
Harmonic Monitoring
No
Yes
IEC 61000-4-30 Monitoring Capability
No
Yes
PQ Based Switching Capability
No
Yes
Brownout Protection
Limited
Yes
Transient Event Monitoring
No
Yes
Remote Analysis & Reporting
Limited
Citrus and AsMoSys Platforms
Event Analytics
Limited
Advanced disturbance analytics
Configuration Options
Fixed ATS logic
User configurable or hard-coded logic
Application Flexibility
Standard ATS applications
Rail, Utilities, Data Centres, BESS, Critical Infrastructure
Integrated Monitoring + Switching
No
Yes – One-box ATS and PQ Intelligence Solution

Key Features

  • Integrated Automatic Transfer Switching (ATS) based on Power Quality Intelligence in a single platform
  • Real time half cycle RMS voltage calculation for ultra fast disturbance detection
  • RMS processing updates approximately every one third of a cycle for rapid switching response
  • Typical Miro relay operation of approximately 10 ms
  • Fast switching between:
    • Normal and Emergency supplies
    • Utility 1 and Utility 2
    • Utility and Generator supplies
    • Redundant critical power sources
  • Continuous three phase voltage monitoring
  • Automatic transfer initiation during:
    • Voltage dips
    • Brownouts
    • Voltage swells
    • Phase failures
    • Supply instability
    • Frequency abnormalities
    • Harmonic disturbances
  • Configurable switching thresholds based on user defined power quality parameters
  • Ability to transfer if disturbance is detected on any single phase
  • Simultaneous switching, event recording, waveform capture, and disturbance analytics
  • One box ATS and Power Quality monitoring solution
  • Integrated waveform capture during transfer events
  • Event and disturbance recording before, during, and after switching
  • Root cause analysis capability for supply disturbances
  • Protection of downstream critical loads from brownouts and transient events
  • User configurable or hard coded operational logic
  • Password protected engineering configuration options
  • Integrated remote 4G cellular communications
  • Optional Ethernet communications

Technical Information

  • Remote monitoring via Citrus and AsMoSys platforms
  • Real time alarms and remote engineering diagnostics
  • Harmonic monitoring and power quality trending
  • Three voltage and three current monitoring inputs
  • Suitable for critical infrastructure and mission critical applications
  • Main feeder switching capacities available from 150 A to 1000 A and higher upon request
  • Suitable for railway signalling, utilities, data centres, industrial facilities, BESS systems, and critical infrastructure applications

 

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