Tests up to the medium voltage (MV) level refer to conducting testing of electrical systems operating at medium voltage, which is the voltage range between 1 kV and 35 kV. Medium voltage is used to distribute electricity in medium supply networks, industrial plants, and in some larger buildings and complexes. All these types of tests are carried out to ensure the safety, reliability and functionality of medium voltage electrical systems. Regularly performing these tests is essential to maintain electrotechnical systems in proper working order and to prevent accidents or malfunctions. When it comes to tests at the medium voltage level, the following tests are usually performed.

Insulation testing

It checks the quality of the insulation in the electrical system to ensure that there is no current leakage between conductors or between conductors and ground. This is crucial to prevent short circuits or other insulation problems.

Testing the switch

These tests verify the performance of medium voltage circuit breakers to ensure that they can reliably break the circuit in the event of an overload or fault. This includes testing the circuit breaker’s breaking capacity, operating stability and reliability.

Grounding test

Checks the effectiveness of the grounding in the electrical system to ensure that the ground resistance meets the set requirements. Grounding is important for protection against electric shocks and for ensuring the stable operation of electrical systems.

Insulation resistance testing

It measures the resistance between conductors and ground to ensure that the insulation of electrical conductors is not damaged and that there is no current leakage.

Testing of protective systems, such as grounding, insulation and surge protection, is essential to ensure the safety and reliability of electrotechnical systems. By carrying out these tests, the safety and reliability of electrotechnical systems is ensured, preventing accidents, breakdowns and equipment damage. Regular testing of protective systems is essential for maintaining the safety and functionality of electrotechnical installations, and for preventing potential injuries or damages.

Grounding

Grounding is the process of establishing a safe path for electrical current in the event of a fault or short circuit. Grounding tests include measuring the resistance of the ground to ensure that it is low enough. The low ground resistance ensures a fast and efficient path for the current that may occur in the event of a fault, thus preventing electric shocks and minimizing damage to equipment. Grounding testing also includes checking the integrity of grounding conductors, connections and other equipment that participates in the grounding system.

Isolation

Insulation testing checks the quality of the insulation of electrical conductors and equipment to ensure that there are no current leaks. This test usually involves measuring the insulation resistance, which must be above a certain limit to ensure reliable insulation. A low level of insulation resistance may indicate insulation damage, which can lead to short circuits, electric shocks, or other hazards. Checking the integrity of the insulation is essential to ensure the safety and reliability of electrical systems.

Overvoltage protection

These tests are aimed at verifying the effectiveness of surge protection to ensure that electrical equipment is protected against sudden surges in the network. This includes checking the correctness of surge protectors and other devices used to protect electrical systems from surges caused by lightning, power outages or other factors. Regularly performing these tests ensures that the protection systems work correctly and react to surges in a timely manner, thereby reducing the risk of damage or failure of electrical equipment.

Tests of electric motors, transformers, cables and other equipment are key steps in ensuring the safety, reliability and efficiency of electrotechnical systems. These tests are carried out to verify the correctness, functionality and performance of each component of the electrical system, and to ensure that they work in accordance with regulations and standards. Each of the items requires specific tests and checks to ensure their proper function and performance.

Electric motors

Electric motor tests include insulation testing, performance testing, efficiency and load testing, and vibration and noise testing. These tests ensure that the electric motors work correctly, efficiently and safely, and that they are able to withstand the load and operating conditions.

Transformers

Transformer testing includes insulation testing, transformer sheath testing, loss and efficiency testing, and load testing. These tests ensure that the transformers can reliably convert electricity from one form to another, and that they work in accordance with regulations and standards.

Cables

Cable tests include insulation resistance measurement, insulation leakage testing, conductivity testing, and cable capacitance and inductance testing. These tests help ensure that cables are installed correctly and are in good condition to prevent short circuits, loss of power, or other problems.

Other equipment

Testing other equipment may include checking the operation of switches, fuses, relays, surge protection systems and other components of electrotechnical systems. They are carried out to ensure that every component of the system works correctly and safely, and that it complies with regulations and standards.

Thermography is a technique used to visualize and analyze thermal patterns and temperature distribution on surfaces. This technique uses a thermal camera or thermographic camera that detects infrared radiation emitted by a body or object to create a thermal image. The thermographic image enables the detection of temperature variations that may indicate various problems or defects in the examined objects or systems.

Thermography is often used to inspect electrical installations to detect overheating, improper connections, or other problems that may indicate potential malfunctions or safety risks. In mechanics, thermography can detect irregularities in the operation of machines or systems at high temperatures, while in construction it is used to detect heat losses, drafts, moisture or other problems in buildings.

The advantages of thermography include quick detection of problems without the need for physical contact with the object, the possibility of testing in a working environment and precise location of problems. Thermographic tests can provide valuable information about the condition of the object or system being tested, enabling timely troubleshooting and prevention of potential failures or accidents.

Energy consumption monitoring

Monitoring electricity consumption can be of great importance. In addition to increasing costs, increased electricity consumption may indicate malfunctions within the system. In addition to the detection of faults, the control of electricity consumption is a key segment in preventive maintenance where, due to a certain change in electricity consumption, the wear of machine components (eg bearings) can be detected. Preventive maintenance of this type can prevent breakdowns, unexpected financial losses or the occurrence of any form of damage.

We offer the installation of equipment for measuring electricity consumption and the creation of customized software solutions. Our equipment and software offer you insight into a detailed display of energy consumption by individual device and part of the system according to your requirements. You can access the visualization in real time at any time and you have the option of saving the data for subsequent analysis.

Energy management

In addition to monitoring electricity consumption within the system, smart consumption management is also an important segment. Using the collected data, our team will analyze and optimize electricity consumption for you in detail.

A detailed plan for the inclusion of each segment of the system achieves greater efficiency, and thus the profitability of the system. System optimization can be further improved by modernization. The main modernization techniques that improve energy efficiency are the implementation of modern elements that require less electricity to perform work in an identical or even better way and the installation of a smart management system.

Overall Equipment Effectiveness (OEE)

Overall Equipment Effectiveness or OEE for short is a measure for showing the efficiency of a system, machine or device in relation to the full potential of production. The overall efficiency is divided into three separate components: availability (the time frame in which the system is able to work), performance (the speed of the system’s operation) and quality (the production of correctly made pieces).

In order for your equipment to reach maximum efficiency, and therefore profitability, contact us. Based on measurements with the most modern equipment, expert data analysis and adequate calculations, we can improve the efficiency of your system or machine.

One of the main ways to increase the efficiency of old machines and systems is modernization, which our experienced team of experts can perform for you.

Our platforms:

• Yokogawa GM10 module
• Yokogawa GA10 software
• SIMATIC Energy Manager
• Siemens
• Yokogawa
• SOCOMEC
• Schneider Electric
• Phoenix Contact