Press articles

The use of electrical installations and equipment may pose a risk of electric shock, particularly when a fault occurs in the supply circuit or in equipment connected to it. Protection of persons who are in the immediate vicinity of electrical equipment at the moment a short circuit occurs is achieved by the automatic disconnection of supply. What does protection by automatic disconnection of supply involve? To verify that this type of protection is in place, it is necessary to check whethe

Micro-ohmmeters are essential instruments for measuring very low resistances in electrical power systems. They enable the early detection of loose connections, overheated contacts and hidden defects before these issues result in failures or fire hazards. This article explains how the four-wire Kelvin measurement method works, why a high test current is essential, and how Sonel MMR-6500 and MMR-6700 micro-ohmmeters support diagnostics of circuit breakers, busbars, cables, earthing systems, transf

The requirement to implement repeatable and automated insulation resistance testing directly on production lines has driven the design and development of dedicated measuring instruments. Sonel MIC-RS meters address this requirement by combining measurement capabilities with a design typical of industrial automation components: DIN rail mounting (using external adapters), an isolated 24 V DC power supply and full compliance with industrial standards (including EN IEC 61557, EN 61010 and EMC requi

Employers, facility managers and service company owners are required to ensure the safety of the electrical equipment used by their staff and end users. Regular technical inspections are not just a legal formality – they are a key part of an employer’s safety and prevention strategy. The modern Sonel PAT-95 and PAT-96 safety testers are the perfect answer to these needs. Testing in compliance with EN 50678, EN 50699, and EN 60974-4 standards These instruments are designed for m

The dynamic growth of electromobility calls for modern diagnostic tools that can ensure the safety and reliability of electric vehicle charging stations. One such solution is the Sonel EVSE-100 – a multifunction analyser specifically designed to comprehensively test EV charging infrastructure. The Sonel EVSE-100 enables the verification of an EV charging systems functionality and protective measures, as well as being able to detect possible faults in charging circuits. Thanks to its bro

Loop impedance measurement on photovoltaic farms in IT systems with voltages up to 900 V AC is one of the greatest challenges in modern PV system diagnostics. High voltages, the specifics of IT networks, the presence of inverters, and the large scale of installations require not only specialized equipment, but also knowledge, experience, and a precisely planned measurement methodology. How can such measurements be carried out safely and effectively? Which standards must be met, and what should b

The measurement of current-voltage (I-V) characteristics of photovoltaic panels plays a key role in evaluating system efficiency and detecting potential issues within a PV installation. Learn how to perform accurate measurements in compliance with IEC 61829 using the advanced Sonel PVM-1530 Max meter. Discover the impact of environmental factors such as irradiance and temperature on the measurement results, as well as the importance of correcting these to standard test conditions (STC). I-V c

In a world where we are seeing the rapid growth of photovoltaic micro-installations, it is essential to not only ensure their proper installation but also to regularly assess their technical condition. The advanced PVM-1021 Pro meter from Sonel S.A. delivers comprehensive, standard-compliant measurements, ensuring both the safety and high operational reliability of PV systems. Growing Significance of PV System Checks  In 2025, the number of prosumer micro-installations in Poland is ex

Having your electrical equipment damaged during a storm can prove very costly; to make matters worse, it can be quite difficult to get compensation from your insurer. Learn what measures you can take to boost your chances of a successful claim and avoid any trouble with your insurance policy. Electrical damage during a storm A TV set, refrigerator, gaming console, audio equipment, central heating furnace, heat pump and several other expensive appliances were damaged because they were plugg

Proper lighting in work places represents one of the most crucial factors that have an impact on comfort and efficiency in task performance. EN 12464-1:2021 set outs the requirements for lighting intensity and quality in indoor work places so as to ensure optimal working conditions. This article discusses the key principles of the standard and aspects of its implementation. Importance of EN 12464-1:2021 Adopted by the European Committee for Standardisation (CEN) on 9 May 2021, EN 12464-1:2

Verifying the safety of electrical equipment requires reliable measuring devices designed for challenging field and industrial conditions. Thanks to their advanced features and intuitive operation, the state-of-the-art PAT-96 and PAT-95 meters from Sonel ensure precise and compliant safety measurements of electrical appliances, power tools and welding machines. It is a perfect solution for the most demanding users. Precision and reliability in testing electrical equipment Electrical and we

The PQM-750 analyser is Sonel's answer to the growing demands of the power market. Developed for precise, continuous monitoring of network parameters, it is distinguished by its compact design, modular structure and advanced functionality. Evolution of power quality analysers Sonel has been developing its range of power quality analysers for many years. Starting with the pioneering Sonel PQM-701, through the next generations of Sonel PQM-700 / PQM-707 meters, and ending with the advanc

The basic model belonging to the Sonel MPI series family of multifunction meters is the Sonel MPI-535. This device combines advanced technology, measurement versatility and ease of use, offering high quality at an affordable price.   Modern platform The Sonel MPI-535 meter is based on the same hardware and software platform as the flagship Sonel MPI-540-PV. The device is designed for safety measurements of electrical installations in residential and industrial buildings. 

Construction and earthworks are increasingly being carried out in locations densely occupied by buried utilities. How to really prevent their damage and avoid costly repairs? One solution is cable, wiring and buried utility locators which enable safe construction and earth moving. Nearly construction projects involve some earthwork. A result is usually the need to adapt new construction features to the buried utilities existing on site, which means building next to, over, or under the utiliti

Discover the advantages of the Sonel MRU-12 - a new meter for measuring earth resistance and soil resistivity. The compact structure, durable and robust enclosure, many measurement methods and numerous functions make it perfect solution for demanding measurement conditions. Ergonomic enclosure and easy-to-clear display The Sonel MRU-12 enclosure is renowned for its ergonomics. The combination of plastic and rubber components prevents accidental slipping from the hand and provides protectio

With the number of photovoltaic systems on the rise, it is vital to ensure that they are safe and comply with applicable regulations. To meet these needs, we have designed our new Sonel PVM-1530 meter which is dedicated to measuring solar PV systems operating at voltages up to 1500V and meets the requirements of IEC 62446-1. Growing significance of solar PV system checks The energy sector is in the process of transforming from a conventional and centralised model to a distributed model. Th

The increasing use of batteries as main or emergency power sources increases the need to ensure their safety and optimum performance. How to properly diagnose and maintain batteries to minimise the risks associated with their operation and extend their life? Versatility and use of batteries Batteries, or rechargeable batteries, are used not only as energy sources for electronic devices or power tools but also in emergency power systems, internal combustion engines, electric cars, and forkl

Resolutions from 256 x 192 to 640 x 480, manual and automatic focus, temperature range from -40°C to 650°C, IFOV from 1.70 to 0.68 mrad. Sonel is expanding its offer with five series 500 thermal imaging cameras. An ideal proposition for both seasoned and aspiring thermographers. Use of thermal imaging cameras in the industry, electrical and HVAC sectors Electricians, HVAC and RES technicians, professionals in the area of commercial power generation, industry and a number of other s

Non-linear loads such as UPSs, computer PSUs, LED lamps, inverters, air conditioners, etc. draw mains current which is distorted and off-phase with voltage. One of the negative effects of the operation is the generation of capacitive reactive power into the grid. This operation is charged extra by DSOs (applying liquidated/contractual damages), and the costs can be considerable. The issue can be solved in several ways, although one of the simplest and most effective solutions is a dynamic var

With the increasing and dynamic development of solar photovoltaic farms and power plants, we are witnessing a growing demand for proper short-circuit loop impedance measurement between the inverter and the LV/MV transformer. To enable these tests to be made, Sonel have developed the Sonel MZC-340-PV high current loop impedance meter. The world's first meter designed for measuring short-circuit loop impedance in networks with voltages as high as 900V AC and are within the CAT IV 1000V measure

How to reduce the costs of industrial production in spite of the rising energy prices? Enter the new Sonel KUS-100 acoustic camera, a device which will allow you to detect damage and achieve significant savings thanks to the reduction of energy losses. Because of the continuous increase in energy prices, optimisation and reduction of losses in industrial processes are becoming ever more important aspects of production. Among the elements that are the most vulnerable to increases in electricit

Sonel CMP-400, CMP-401 and CMP-1006 – these clamp meters don’t need to be introduced. There have been tens of thousands of them sold over the last few years all around the world and they are about to take a well-deserved retirement. They are to be replaced by the new generation of clamp meters – Sonel CMP-402, CMP-403 and CMP-1010, together with Sonel CMP-1015-PV. New look and consistent design All clamp meters in the new series have consistent design which makes their us

Nowadays, where our lives are largely dependent on electricity, reliable and efficient batteries are becoming a more and more important part of the energy and electrical infrastructure, automotive industry and even everyday life. Using portable devices, electric cars and emergency power systems would be impossible without them.  In manufacturing plants, warehouses and other workplaces, a reliable power supply e.g. for switching on the emergency lighting using the facility’s own bat

When you think about locators, “Sonel” is the first word that comes to mind. This manufacturer of measuring instruments has been offering professional solutions for cable tracing and fault detection for over a decade. The well-known LKZ-720, LKZ-1000 and LKZ-2000 models have just been joined by a new locator set – Sonel LKZ-2500. The solutions introduced in the new set are unique on a global scale, and they include functions that were previously only found in much more expensiv

The influence of polarity of connected test leads on the measurement results The technical department of SONEL S.A receives many customer questions: "Is the polarity of connected test leads important when measuring the insulation resistance e.g of a power cable?" A professional electronic technician, who measures the resistance of a resistor would answer that it is not significantly important, as the results of measurements made in both directions, would not differ from each othe

A well-made electrical wiring systems guarantees reliable power supply for many years, but sometimes a visit from a professional electrician is be necessary. At first glance, when we see the tools an electrician uses, we will know whether we are dealing with a professional in this field, or maybe an amateur visited us with a test light, comprising a bulb and lamp holder from a bygone era. Sonel MIC-5 features With a quick diagnosis by a professional, the lost power supply can be easily res

The developing world and industry are posing new challenges to electricians, for which not only a different approach than before is needed, but also completely new measuring equipment. This leap is best seen in electromobility and renewable energy sources, where the voltage of 1,000 V DC has long been exceeded.   Sonel comes to the rescue with its AHV-3 high-voltage adapter, which allows safe measurement of DC voltages up to 3,000 V. The word 'safe' is not used here by accid

The increasing popularity of photovoltaic installations makes investors more eager to set up such micro-installations on their land. Aiming to maximise the safety of such installations, the regular inspections must not only include the electric parameters, but also the heat parameters of the specific components. Photovoltaic installations vs safety Overheating components of photovoltaic installations pose a severe fire hazard. Their quick detection and identification is mandatory in terms

Testing the safety of electrical equipment and power tools is essential in order to prevent accidents at the workplace, public utility facilities and at home. In case of failure, user’s health or even life could be at risk. From the perspective of companies, occupational health and safety regulations increasingly require the equipment in the company to be inspected on a regular basis and inspection results to be archived. This is directly correlated with criminal liability in case of accid

Measurements of electrical installations in residential buildings should be carried out quickly, accurately and safely. This type of work is greatly facilitated by the use of handheld measuring devices such as multimeters, indicators, thermal imaging cameras, locators or range finders. A must-have for every electrician One thing is sure to be found in every toolbox: a multimeter. It is a device in a small housing but with numerous functions, without which the installer could not do their j