HV / LV Maintenance Services

What ISS can do

ISS will expand, improve and maintain your critical electrical infrastructure to ensure the continued, improved and safe operation of your network, leaving you rest assured that you will be working with professional and highly competent Electrical Distribution Engineers.

Our comprehensive maintenance service covers both old and new equipment, from bulk oil switchgear to modern insulated devices, Induction Disc Relays, through to microprocessor based protection and metering units. We undertake maintenance on switchgear, transformers, electrical protection systems, all in accordance with BS 6626 and BS 6423.

If you require assistance in your time of need, please call ISS, your electrical emergency service provider, who will support you with Low & High Voltage Assets & System support. We provide 24/7/365 Technical Support and Call Out services to existing and new clients, with a range Maintenance & Support Contracts available.

Customer requirements


  • Maintain your critical electrical equipment to ensure safe and efficient operation of your infrastructure

  • Work with professional and competent electrical distribution engineer to maintain and test Low and High Voltage equipment and control systems

  • Receive 24-7-365 technical support

  • A clear and consistent emphasis on Health, Safety and Quality from the outset

  • Maintain and improve continuity of service

  • Protect your assets and personnel

Our services will


  • Assist with predictive maintenance to reduce downtime

  • ISS will sit down with you to assist in the production a pre-planned maintenance schedule

  • Agree call out response times for your critical plant

  • Increase product operational life time

  • 24-7-365 Technical Support & Call Out Service

  • A clear and consistent emphasis on Health, Safety and Quality from the outset

  • Manage your LV/HV Infrastructure

The benefits

  • Receive an ISS dedicated single point for your maintenance / support contract

  • Work with a multi-disciplined & highly skilled site team

  • An infrastructure which is compliant British and International standards

  • Maintenance by dedicated and highly skilled Service Engineers, using specialised tools and test equipment

  • Issue of maintenance/ test reports, including observations and recommendations, to assist you in making infrastructure decisions

HV & LV AD-HOC & Fixed Term Maintenance & Support Contracts


  • Support & Maintenance Contracts available for all of your LV & HV infrastructure, which can be tailored to meet your requirements

  • Provision of SAP’s up to 33kV to manage your network

  • HV / LV Switchboard Maintenance

  • HV / LV Circuit Breaker Maintenance

  • Protection Relay Testing

  • HV / LV MCC Maintenance

  • HV / LV Busbar Inspections

  • Transformer Maintenance

  • Annual Inspections

  • Thermographic Surveys




24/7/365 Emergency Call Out Service

0161 344 1117

If you would like to discuss your upcoming project please call us on 0161 344 1117 or email sales@iss-services.co.uk, one of our team will be happy to discuss your requirements.