Power Systems Earthing and Lightening Protection

Our Services Are Detailed Below:

We offer an extensive range of Power Systems Earthing and Lightening Protection Services, please do not hesitate to contact us to discuss your requirements on 01685 350062 or 08000 496 450

Substation Commission and Maintenance

• Provide Design and As Built Drawings

• Protection Study

• Setting and programming schemes

• G59, Witness and Annual Maintenance

• Protection Relay Testing

• Distance

• Differential

• Current

• Earth Fault

• Frequency

• Voltage

• G59/2-3 requirements

• Battery Impedance and Discharge Testing

• Contact Resistance

• Gap Testing

• AC Power Frequency Withstand Testing

• DC Withstand and IR Testing

• Current Transformer (CT) and Voltage Transformer (VT)

• Primary Injection Testing

• CT and VT Analysing and Calibrating

• Circuit Breaker Timing and Analysing

• Full Installation, Rewire and Retrofitting


Transformer Commission and Maintenance

• Sweep Frequency Response Analysis (SFRA)

• Transformer Turns Ratio (TTR)

• Transformer Winding Resistance

• Power Factor/Tan

• AC Power Frequency Withstand

• DC Withstand and Insulation Resistance (IR)

• Dielectric Absorption Ratio

• Short Circuit Impedance Load Loss Measurements

• No Load Losses and Current

• Magnetising Current

• Pressure Release Valves (PRV)

• Oil Thermal Indicators (TI)

• Winding Thermal Indicators (TI)

• On-load and Off-load Tap Changer Function and Analysis

• Cooling Function Test - oil pumps, fans etc.

• On site oil breakdown voltage, dissolvable gas analysis and water content.

• Design and Retrofit oil bunds for transformers

• Full onsite Transformer Paint Respray Maintenance and Monitoring Systems

• Online, non-intrusive Partial Discharge Surveys in MV/HV Systems

• Online, Non-intrusive Partial Discharge Mapping in MV/HV Systems

• Offline Partial Discharge Mapping in MV/HV Systems

• Transient Earth Voltage Survey Trend Analysis

• Battery Impedance and Discharge testing

• Power Quality Analysis

• Firm Frequency Response

• Thermography Survey Analysis Report

• Drone Thermography

• Draw Oil Samples - In accordance to BS EN 60475:2011 for onsite or offsite analysis

• Our HV Maintenance Package include Thermal Imaging (TI) and Transient Earth Voltage (TEV) - survey reports as standard

 Switchgear Testing Commission

Lorry with transformer





Our Accreditations