Specialist Services and Products

Our Services Are Detailed Below:

We have an extensive range of Specialist Services, please do not hesitate to contact us to discuss your requirements on 01685 350062

Substation Commission and Maintenance

• Provide Design and As Built Drawings

• Protection Study

• Setting and programming schemes

• 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


 Certified SF6 Handling and Installation

• Gas Testing Analysis

• SF6 Leak Inspection

• SF6 Recovery, top Ups and Refills

• Fault Investigations

• Decontamination and Restoration Works

• SF6 Installation, Servicing and Maintenance

• Recovery, Repair or Decommission on Sulphur Hexafluoride (SF6) filled

High Voltage Electrical Switchgear in Accordance with EU Regulations

NO:517/2014 and the Fluorinated Greenhouse Gases Regulations 2015


Mobile Oil Testing and Analysis

• Water Content and Dissolvable Gas Analysis

• Oil Voltage withstand Testing



Switchgear Testing Commisson

Switchgear Testing Commission 

Lorry with Transformer

Lorry with Transformer

Smart Electrical Systems Van with Trailer

Smart Electrical Systems Van with Trailer

 Mobile Oil Testing Lab

Smart Electrical Systems - Mobile Oil Testing Lab

Mobile Transformer Test Trailer

 Smart Electrical Systems - van with transformer

Training Room and Facilities

Smart Electrical Systems - Training Facilities



Our Accreditations