What we do

Services

Our customised services provide ‘what it takes’ to ensure clients’ energy infrastructure assets are up and running, performing safely, reliably and efficiently.

You might require ongoing services that respond promptly to unplanned outages, making critical repairs and minimising downtimes. Or it might take the delivery of a capital project to address underperforming infrastructure, increase capacity or extend the life of an asset.

Rayo will respond to valued clients’ needs through a pre-agreed range of options, ranging from the mobilisation of consulting, service or maintenance teams on agreed terms, to secondments of individual or group specialist expertise into owners’ team to deliver the right solution.

With extensive experience across diverse industries and strong partnerships with utility providers and private asset owners, Rayo is a trusted partner in delivering turnkey solutions for maintaining and enhancing energy infrastructure.

Download Capabilities

Substation asset management

Rayo’s specialist substation services include:

  • Inspections and routine maintenance
  • Corrective maintenance and Asset refurbishment
  • Emergency replacements and commissioning
  • Switchgear and primary plant maintenance
  • Protection and secondary system testing and maintenance
  • Thermography
  • Shutdown Maintenance

Outage management

Rayo expertly handles HV network outages with a structured approach that includes:

  • Outage planning and scheduling
  • Switching operations with in-house operators
  • Trip risk assessments and energisation requests
  • Emergency recall and first-response services.

High voltage (HV) testing services

We use advanced equipment such as Doble®, Omicron, Megger and HV Diagnostics to deliver:

  • Primary Plant Testing (Circuit Breaker, CT, VT, Surge Arrester) including
    • Dielectric Loss Angle (DLA) Testing
    • CB Timing Testing
    • CT and VT Analyser (Acceptance) tests
    • Oil and SF6 Sampling
    • HV Cable Testing – VLF Withstand, Tan Delata and Partial Discharge Testing
  • Switchboard testing, including 50Hz Withstand and Partial Discharge Testing
  • Power Transformer testing. Full suite of testing is available using Omicron or Doble equipment including
    • Static and Dynamic Winding resistance measurements
    • Ratio measurement
    • Dielectric Loss Angle Measurement (TF and Bushing)
    • Insulation Resistance and Polarity Index
    • Leakage Reactance (Impedance) testing
    • Sweep Frequency Response Analysis (SFRA)
    • Moisture Analysis (Dirana)
    • Oil Sampling and analysis
  • Earth Grid testing
  • Elevated work platform (EWP) and HV PPE testing.

Commissioning

Our in-house commissioning officers will help deliver your project ready for energisation and can deliver or assist with the following

  • Preparing Commissioning Management Plans, Inspection Test Plans (ITPs), energisation sequencing and all QA documentation management
  • Factory Acceptance Testing (FAT) of Primary equipment listed below to ensure it supplied as per design and specifications
    • Current Transformers
    • Voltage Transformers
    • Circuit Breakers
    • Transformers
    • Isolators / Disconnectors
    • Metal Clad Switchgear (GIS / AIS)
    • HV Cables
  • Factory Acceptance Testing of Protection and Control systems (SCADA) to ensure equipment is functional, and configuration files are designed correctly
    • Secondary Injection to confirm Protection function operation
    • Binary Input / Output testing to check logic programming
    • SCADA config file signal simulation and testing
  • Site Acceptance Testing (SAT) of all components of HV Systems. Primary, Secondary, Earth grid, Communications and SCADA to ensure the total facility integrates correctly and operates as intended
    • Protection scheme testing including CB trip testing and interlocking
    • Current Injection testing to confirm operation and stability of protection schemes
    • End to end, or cross Asset Boundary testing using remote crews
    • Complete SCADA testing, ensuring all systems are fully operational and integrated
    • Energisation management, including temporary energisation schemes
    • On load measurements and checks
    • Generator performance Standards compliance testing (R2)
  • Drawing Management, including alterations and markups from Commissioning
  • Completion of documentation pack to provide to the end user
  • Training on the commissioned system for the end user

Consulting

Our in house team with decades of experience can provide specialist advice and help with:

  • Fault investigation and analysis
  • Technical and safety Investigations (ICAM)
  • Maintenance Plan development and review
  • Condition Based maintenance assessment
  • Upgrade / Augmentation assessment and advice
  • Data logger measurements to assist with power quality assessments