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  • Public Utilitie

Public Utilities 

Related Accreditation
Related AccreditationCommon Equipments being used
  • Infrared Thermographic Camera
  • Insulation Oil Gas Analyzer
  • AC Insulation Diagnosis Device
  • Multi-functional Primary Test Set
  • Radiographic Examinationt

Power generation station

Many industrial and commercial electric customers now require a higher level of power quality due to increasing sensitivity of sophisticated process controls and the growing reliance computer. These customers are especially sensitive to momentary voltage sags caused by remote faults on the transmission system or on parallel feeder circuits.

System Analysis

KESA analyzes generation and transmission systems and provides solutions to achieve required power stability and reliability. This leads to SLD electrical system configuration showing the:

  • Grid Connections including generator circuit breakers and bus ducts   connections
  • All voltage levels of substation switchgear including circuit breakers and   switches
  • Transformers Units with auxiliary 
  • Substations control, metering and protection systems
  • Stand-by power system including emergency and auxiliary power supply
  • Motors and frequency converters
  • High-speed transfer devices
  • Cabling systems
  • Synchronization, excitation and automatic voltage regulation systems
  • Transmission lines


A transformer can accept energy at one voltage and deliver it at another voltage. This permits electrical energy to be generated at relatively low voltages and transmitted at high voltages and low currents, thus reducing line losses and voltage drop.

Losses in Electrical Distribution Equipment

  • Outdoor circuit breaker
  • Generators
  • Medium voltage switchgears
  • Current limiting reactors
  • Transformers
  • Load break switches
  • Medium voltage starters
  • Bus ways less than 430V
  • Low Voltage Switchgear
  • Motor control centers
  • Cables
  • Large Rectifiers
  • Static variable speed drives
  • Capacitors



Electrical substations are utility devices located between a generation plant and the consumers who use the plant's electricity. The substations are connected to the grid through power lines. Using transformers, substations transform voltage from high to low and vice versa in order to fit the voltage requirements of the receiver. Substation inspections are important in that they detect problems that not only could be deadly or injurious to employees, but also to the community at large.


Transmission Power Cables

Inspection and diagnosis
This scope consists of initial, periodical, minute, and spacer inspections to check for the presence of metallic materials on power transmission lines and pylons, and to check pylons and power cables in dead wire status; wire splicing inspections to check their compliance status by checking for excessive heating using an Ultra-Violet Corona Detection Camera in live status; measurement of excessive grounding resistance to measure the soundness of grounding resistance, which serves to prevent back flashover of the insulator in the event of abnormal voltage such as lightning strikes; and high-powered telescopic inspections of wires for the presence of metallic materials. Detecting defective insulators and This work consists in detecting problems with the insulators that maintain insulation between the pylon and the wires in live status.

Maintenance work
KESCO performs maintenance work based on patrols, inspection, measurement, detection, to ensure it’s the best service provided. KESA is auditing the work practices to be used during the operation and maintenance of electric power generation, transmission, and distribution facilities. The KESA includes areas relating to enclosed spaces, hazardous energy control, working near energized parts, grounding for employee protection, work on underground and overhead installations, line-clearance tree trimming, work in substations and generating plants, and other special conditions and equipment unique to the generation, transmission, and distribution of electric energy. Compliance with these assessments will support to prevent injuries to employees working on electric power systems as well.

The followings are being Audited;

  • Condition monitoring (such as partial discharge survey / locating / monitoring, Oil Analysis, -Infrared Thermography etc)
  • Service condition of Electric Utility Distribution Network consisting of equipment such as Indoor Metal enclosed Oil/Vacuum switchgears, Oil & SF6 Ring Main Units + Extensible switches, Oil & Dry type Transformers, Cable terminations, Feeder Pillars, Distribution Package Units etc.
  • Condition Based Risk Assessment & Management process

KESA’s major tools are as Follows;

  • Oil sampling and analysis of Transformers & Voltage Regulators
  • Partial Discharge testing Distribution Switchgear
  • SF6 leak detection from Ring Main Units
  • Infrared Thermal Imaging of the Switchgears, Transformers and LV Feeder Pillars
  • Comprehensive Analysis and Assessment report