EKA System
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POWER PLANTS AND SUBSTATIONS

Power Generation and Transmission

Traceable AC and DC auxiliary-power architectures designed to keep protection, control and switching circuits operating reliably during a grid outage.

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Power Generation and Transmission critical-power infrastructure

OPERATING REQUIREMENTS

Design starts with the consequences of an outage.

The appropriate architecture is defined by critical functions, load behaviour, maintenance paths and site conditions, as well as equipment ratings.

Power-continuity requirements

  • Maintain protection and control functions when the grid is lost
  • Supply circuit-breaker switching pulses alongside continuous loads
  • Detect DC earth faults early
  • Maintain controlled supply to critical busbars during maintenance

Critical loads

  • Protection relays and bay control units
  • Circuit-breaker opening and closing coils
  • SCADA, communications and time synchronisation
  • Emergency lighting, control and auxiliary AC loads

PROPOSED ARCHITECTURE

A traceable chain from source to critical load.

  1. Facility AC auxiliary supply
  2. Rectifier and battery system
  3. A/B DC busbars
  4. Selective DC distribution
  5. Protection, control and SCADA

This diagram shows a typical solution approach. Final topology is established using the load list, single-failure criteria, operating philosophy and approved project data.

ENGINEERING DECISIONS

Redundancy, protection and monitoring are assessed together.

Redundancy strategy

  • N+1 modular or dual-rectifier arrangements according to load criticality
  • Independent A/B busbars, coupling and maintenance scenarios
  • Verify remaining charging and load capacity after a single failure

Protection strategy

  • Selectivity between AC inputs, DC busbars and feeders
  • DC breaking capacity matched to battery short-circuit contribution
  • Overvoltage, reverse-polarity and insulation-monitoring strategy

Control and monitoring

  • Rectifier, battery and feeder alarm summaries
  • DC busbar voltage, current and insulation condition
  • Dry-contact or project-protocol signal list for SCADA

PROJECT INPUTS

What information is required for correct selection?

Share the information available at the initial quotation stage. Outstanding technical data can be clarified during the site survey and engineering review.

  • Single-line diagram and existing auxiliary-power sources
  • Continuous, temporary and pulsed DC load list
  • Required autonomy and minimum/maximum load voltages
  • Circuit-breaker coil current and operating duration
  • Short-circuit levels, cable distances and site conditions

EKA DELIVERY SCOPE

Defined responsibilities from calculation to commissioning.

  • Load, battery and rectifier sizing
  • AC/DC single-line, layout and terminal plans
  • Rectifier, battery, distribution and monitoring integration
  • Labelling, cable lists and operating documentation

FAT — factory acceptance testing

  • Visual and mechanical checks
  • Functional, alarm and scenario tests
  • Protection and measurement checks
  • Document and label verification

SAT and commissioning

  • Site connection and polarity checks
  • Battery, busbar and feeder measurements
  • SCADA signal and alarm tests
  • Operating scenarios, training and commissioning records

Discuss your facility’s requirements.

Share the critical-load list, autonomy target and existing power architecture with our engineering team.

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