Established in 1998, specialising in commissioning activities within HV and EHV substations. Commissioning of electrical power systems, including verifying conformity to design drawings, set-up and calibration of all protective devices and testing before initial energizing, is essential to the start up of any electrical system to prevent premature failures and ensure the long-term. At GK Expertise, we specialize in Protection Relay Testing and Testing & Commissioning of Substations across Europe, ensuring seamless and secure power system performance. With a strong background in the electrical industry, our team delivers professional and cost-effective solutions that meet. We provide a comprehensive range of services for testing of: WHAT IS PROTECTION RELAY AND WHY TESTING IS IMPORTANT Protection relays are fault detection devices in power system, which senses the faults by using current and voltage sensors like CT and/or PT and further controls the related circuit. Ensure lower risk, faster start-up and optimum performance for your electrification system, from first operation through the entire life cycle of the equipment. Maximize electrical. ISS provide commissioning services nationwide, providing anything from protection relay testing, pre-commissioning installed equipment, full system commissioning, fault finding, interrogating, modifying and implementing of protection settings. Expertise with producing power system protection relay settings and calculations.