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All electrical equipment must be maintained in a safe condition. All electrical systems must be subject to appropriate inspection, examination, testing and preventative maintenance by competent people. Good visual inspection will pick up a large percentage of common faults, but some faults cannot be found solely by such an inspection.

Ageing mechanisms such as corrosion, erosion, fatigue obsolescence and calibration failure should form part of a site's asset integrity management system. The issue of ageing plant is just the part ofthe overall management of the integrity of a site's assets, and is closely linked to the effectiveness of the inspection, testing, maintenance and calibration regimes. In practice, ageing plant issues may be best tackles as part of overall inspection plans related to asset integrity management.

Analysis of Electrical Power Systems

An analysis of an electrical power system may uncover energy waste, fire hazards, and equipment failure. KESA’s expertises increasingly find that reliability-centered maintenance can save money, energy, and downtime. Moreover, clients can be reliable for the constant safety solutions as well.

In order to control and mitigate major accidents, clients must ensure ageing mechanisms which could cause plant deterioration and increased major hazard risks are recognized and are being maintained effectively. KESA is a solution with its certified and experienced means, which satisfy the clients worldwide.

KESA’s major defined areas as follow;

  • Identify sites where ageing plant is an issue with the potential to give rise to a major accident
  • Target inspections and interventions
  • Assess how well an operator is managing ageing plant and record their performance in a consistent way
  • Identify issues, secure improvement or arrange further interventions as required
  • Testing and calibration of safety-related electrical, control and instrument

Ageing is not about how old your equipment is, it is about its condition

The significance of deterioration and damage relates to the potential effect on the equipment's functionality, availability, reliability and safety.

Operators who utilize plant and equipment subject to ageing should adopt a risk-based approach that entails:

  • Recognition of ageing and where this is or may be occurring
  • Increased coverage, frequency and depth of inspection and maintenance
  • Re-rating or replacement

Ageing is more likely to be an issue on sites that have processes with:

  • A high cycling rate of extreme temperatures, pressures loads or flexing
  • A history of operating at the limit of, or beyond, its original design envelope
  • A high operating temperature
Equipment such as pumps, compressors, may be particularly prone to ageing mechanisms such as corrosion, erosion, and fatigue.


  • External inspection
  • Internal inspection
  • Conductivity of circuits
  • Earth fault loop impedance
  • Effectiveness of electrical protection
  • Insulation resistance of circuits
  • Insulation resistance of apparatus
  • Prospective fault current
  • Residual current device operation
  • Effectiveness of earthing and bonding
  • Portable equipment
  • Polarity
  • Earth electrode resistance
Accessible internal parts of electrical equipment Yearly
All other parts of the electrical installation, including normally inaccessible parts, e.g. internal parts of switchboard, motor terminal boxes and connection boxes. 5 yearly
Insulation Resistance
Earth Fault Loop Impedance
Disconnection times for the protective devices
Every 6 months or yearly
Every 6 months or yearly
Following earth loop impedance tests