POWER CABLE SERVICES

Doble’s range of power cable services includes:

• Consultancy
  • Asset management – guidance with specifications, maintenance programs and condition assessment
  • Factory inspections, audits and witnessing
• Failure investigations
• Online and offline testing
• Training

Consultancy services

Doble provides cable consultancy to support clients through the whole life cycle from developing specifications to determining end-of-life within a structured asset management programme.

Doble Power Services offers the following expert consulting services:

• Specification writing and review
• Factory audits and test witnessing
• Factory Acceptance Testing witnessing
• Support of Asset Management programs:
  • Advice on maintenance practices
  • Guidance on condition assessment, testing and monitoring
  • Asset health evaluation

Failure investigations

If expensive assets reach their end of life point sooner than expected, it is important to figure out why. Doble conducts root cause analysis investigations involving:

• A review of operating and maintenance records, on-site inspections and testing records
• Appropriate analytic techniques including optical and electron microscopy, infrared spectroscopy, x-ray imagine and elemental analysis

Online and offline testing

Using the appropriate test for the particular cable type under investigation is vital to obtaining meaningful and actionable results. Doble can advise on the best testing strategy from MV to EHV for oil-filled and extruded cables, as well as, provide the following testing services:

On-line and offline PD tests at MV & HV cables:

• DC insulation
• AC power factor and capacitance
• AC partial discharge

Off-line PD tests MV power cables:

• Tan delta
• Partial discharge and PD fault location
• Recovery charge voltage