Every year, engineers and technicians are electrocuted — not during high-voltage insulation testing, but after it. The equipment looks safe. The voltage meter reads zero. But inside the insulation, lethal charge is still quietly stored and the dangerous voltage is rebuilding. This post explains why, and how a new technology from Megger called RE>Act is making HV DC insulation testing safer and faster.

MR Power Systems  ·  Based on presentation by Dr Stan Zurek, Megger 

INTRODUCTION

Picture this: a maintenance engineer has just finished a high-voltage DC insulation test on a large motor. The test instrument shows the voltage has discharged to zero, and the operator even used independently a HV discharge stick to ensure that the voltage is indeed discharged. A few minutes later his colleague reaches in to reconnect the motor terminal — and is hit by a shock of several hundred volts. The equipment “looked” safe. But inside the insulation, a hidden charge had been slowly rebuilding.

This phenomenon — known as absorption causing recovery voltage — is well documented in several IEEE and IEC standards, yet still misunderstood by the engineers working with HV equipment every day. RE>Act, a new technology from Megger invented by the team: Paul Swinerd, Stan Zurek, Mark Tutton, Clive Taylor, and Mohineet Kaur, was created specifically to make this invisible hazard visible.

First: what is electrical insulation, really?

Every cable, motor or generator winding, transformer coil, bushing, insulator, surge arrester, and circuit breaker contains electrical insulation — the material that prevents current from flowing where it shouldn’t. Without insulation, high-voltage electricity cannot be safely contained or controlled.

But insulation is not just a passive barrier. From an electrical engineering perspective, insulation behaves like a complex circuit made up of three components working simultaneously:

Component	What it does
Resistance (R)	The classic insulation property — a high resistance means very little current leaks through. This is what insulation resistance (IR) tests measure in MΩ, GΩ, or TΩ.
Capacitance (C)	The insulation stores electrical charge, like a capacitor. This charge builds up quickly during a test and also discharges quickly. It is always dangerous when not discharged.
Absorption (A)	The most misunderstood component. Polarisation of molecules within the insulation material causes charge to be absorbed slowly — and released slowly. This is the hidden hazard.

This three-part model — known as the “equivalent Debye model” — is the key to understanding why HV testing is dangerous even after the voltage source is switched off.

The hidden hazard: what happens after the test?

High voltage is applied to a piece of electrical equipment during the test. The capacitive component charges quickly and discharges quickly when the test ends — this is the part that most discharge procedures are designed to handle, and it is easy to understand.

But the absorption component is different. It charges slowly — and it discharges slowly. Worse still, even after the capacitive charge has been discharged to zero volts, the absorption charge begins to release itself — and this release creates a recovery voltage: the terminal voltage rises again, from zero, back up to potentially dangerous levels. All by itself.

Without any external source. So the capacitance becomes charged again, and charged capacitance is always dangerous.

The confusion is made worse by how standards describe this. IEEE 43-2013 defines the absorption current as one that decays “to nearly zero” — but “nearly zero” reading will be displayed differently by various equipment. Is 0.001 mA nearly zero?

To same people it may, but in reality it is certainly not. At high voltages, this small current can still transfer a lethal charge, from the absorption branch to the capacitive branch. The gap between laboratory theory and workshop reality has safety implications.

What do the standards actually say?

Both IEEE 43 and IEEE 95 — the two main standards governing HV DC insulation testing for rotating machines — acknowledge the hazard, but offer surprisingly vague guidance on how long to wait before touching the equipment.

Read those carefully. The standards say: wait at least 2 hours. Or 4 times the test duration. And you can’t accelerate it. In practice, this means engineers face a choice: wait for hours (with no confirmation that it’s actually safe), or take a risk of confirming that the dangerous voltage is absent. But the standards don’t explain how to do that safely.

In busy maintenance environments, the pressure to get equipment back online is substantial. The lack of real-time feedback — any way to actually see whether the discharge is complete — is exactly the gap that RE>Act was designed to fill.

Introducing RE>Act — see the invisible

RE>Act stands for RE-Absorption Current Test. It’s a new inventive technology (patent applied for) integrated into the new Megger S1 and MIT 5–10–15 kV insulation testers.

The core idea is elegant: instead of disconnecting the equipment and hoping the discharge is complete, RE>Act connects a low-impedance ammeter through a discharge resistor while monitoring the actual discharge current in real time. Both the capacitive discharge and — crucially — the absorption discharge are measured and displayed as they happen.

The operator can now see the real discharge progress in real time, so the guessing is eliminated. So this “dual discharge” process can be now observed in real time by the operator.

How it works — step by step

The RE>Act display shows additional information. At the bottom it is the real-time measured current during absorption discharge. In the middle it is the voltage of the next test as selected on the equipment. The actual voltage is zero (the insulation remain short-circuited), so the RE>Act test is inherently safe by itself. However, the information about the next test voltage and the real current is used for estimation of the usable measurement range for the next test on the same insulation.

If the next expected result is in the accurate range then the next test can be started even without waiting for the full discharge. But if the next result is likely to fall in the blocked range, then longer discharge is necessary, otherwise an unknown amount of measurement error will occur. This helps in avoiding condemning good insulation as bad, or worse still approving bad insulation as good.

Real-world results

RE>Act was tested on multiple types of equipment. Even on a relatively small 50 kVA oil-filled transformer, the discharge behaviour was clearly visualised and the absorption component took significantly longer to dissipate than the capacitive component. The absorption current was above 1 nA even 20 min after the test was finished. On a 90-metre long HV cable (20 kV rated, 16 nF capacitance), the cable remained unsafe for over 25 min after the capacitive voltage had reached zero — precisely as IEEE 95 warns, but now visible and quantifiable in real time.

Operators who used RE>Act on HV motors were able to significantly improve productivity, because they could significantly reduce the 2 h blind waiting time. But more importantly – they were able to eliminate the invisible danger.

PI Predictor — faster testing without compromising safety

RE>Act solves the safety side of the equation. But the productivity is also improved, almost as an effortless byproduct of using this feature.

The Polarisation Index (PI) is a standard diagnostic test that compares the insulation resistance at 10 min and 1 min. A healthy insulation shows increasing resistance over time (good absorption behaviour). But waiting 10 min for every test — and then waiting another 40 min (or even 2 h, depending on the standard) for safe discharge — creates a significant bottleneck in maintenance schedules.

PI Predictor exploits a physical symmetry: shorter polarisation (absorption) means shorter depolarisation (reabsorption). By running a shorter polarisation test and measuring the depolarisation behaviour, the PI Predictor algorithm can predict the 10-minute PI result in typically in just half of the time.

50 min Standard PI test + discharge (10 min charge + 40 min discharge)

14 min With PI Predictor + RE>Act (5 min charge + 9 min discharge)

72% Reduction in total test time — while remaining equally safe and accurate

The test was validated on a 90 kW LV motor. The predicted PI result matched the standard 10-minute result. Total test time: 14 min vs. 50 min. For facilities running dozens of insulation tests per year — on motors, cables, transformers, generators — the productivity gains compound rapidly.

Three benefits that change how HV testing works

Benefit	What it means in practice
Safety	Visualise the complete discharge process — both capacitive and absorption — in real time. Know with certainty when it is safe to touch the equipment, rather than guessing based on a 2-hour waiting rule.
Accuracy	Quantify the correct measurement range before the next test. RE>Act shows not just whether discharge is complete, but the prospective IR range for the next test cycle on the same insulation — eliminating errors due to negative currents.
Productivity	Eliminate unnecessary “blind” discharge time. With PI Predictor, as the total test + discharge time can be reduced by up to 72% while maintaining the same safety margin and diagnostic accuracy.

Why this matters beyond the test lab

HV insulation testing is performed routinely on industrial motors, generators, transformers, and cables — in power stations, manufacturing plants, marine vessels, wind farms, and anywhere else large rotating machines or power distribution equipment is maintained.

The engineers doing this work might be experienced professionals. But experience doesn’t protect you from a hazard you can’t see, and boring routine can be dangerous. Recovery voltage — the insulation recharging itself — is invisible, silent, and can appear minutes or hours after the test ends. The fact that IEEE standards call for 2-hour waiting periods tells you everything about the severity of the risk. And that is with insulation short-circuited. Without short-circuiting the danger can remain for “indefinite” time.

RE>Act doesn’t change the physics. It makes the physics visible. And in safety-critical work, the difference between “I think it’s discharged” and “the instrument confirms it’s discharged” is the difference between risk and certainty.

The Big Picture: Why This Matters

Europe’s electricity grid is under serious strain. Almost every major substation is running at or near its maximum capacity. On top of that, we’re connecting more and more renewable energy sources — solar farms, wind parks — which need new power lines and transformers to bring their electricity into the grid.

To keep up, engineers are adding new lines and transformers to existing infrastructure. But this creates a problem: the safety systems that protect those lines were designed for simpler setups. Now, the setups are getting more complex.

This article explains one key safety system — called Line Differential Protection (or ANSI 87L) — and how it’s being adapted to work in these newer, more complicated configurations.

1. What Is Line Differential Protection?

Think of a power line like a water pipe. If you measure the water going in at one end and the water coming out at the other, they should be equal. If they’re not — some water is leaking somewhere.

Line Differential Protection works the same way with electricity. Sensors called Current Transformers (CTs) measure the current (electricity flow) at both ends of a protected section of line. Under normal conditions, what goes in equals what comes out. If there’s a difference — a fault (like a short circuit or a break in the insulation) — the system detects it and automatically switches off that section to prevent damage or danger.

Why is this important?

Standard Line Differential Protection uses two measurement points (one at each end of the line) and works very well for simple, straight lines. The challenge is: what happens when the line isn’t simple anymore?

2. Three New Challenges

Modern grid development is creating three types of configurations that go beyond the classic straight-line setup:

Challenge	What it is	Main problem
A	A line that splits into a T-shape (three branches)	Three ends to measure, not two
B	A line with a transformer attached at the end	The transformer shifts the signal in ways the sensor must account for
C	A T-shaped line with a transformer in the mix	Both A and B combined — needs four sensors and more complex calculations

3. Challenge A: The T-Shaped Line

What’s the problem?

Imagine a road that splits into three directions. At each road end, you have a sensor. Now, instead of just checking that traffic in equals traffic out at two points, you need to balance three roads at once. That’s what happens with a T-junction in a power line.

With three branches, you need three protection relays (safety devices), all connected to each other by a fiber-optic cable so they can share their measurements in real time.

The hidden complication: cable shields

Modern underground cables are wrapped in a metal shield — a bit like the outer foil on a coaxial TV cable. This shield helps contain the electric field and carries fault current if something goes wrong. The tricky part is how the shield is connected to the ground.

There are three common ways to do this: Solid Bonding (both ends grounded), Mid-Point Connection (only the middle is grounded), and Cross Bonding (the most common in long high-voltage cables, where sections of shield are swapped and grounded in a pattern that nearly cancels out induced currents).

The protection system sees these shield currents too. It needs to know which currents are normal and which signal a real fault. The algorithm has to be configured for the grounding method used in each installation.

4. Challenge B: The Line with a Transformer

Why are transformers being added to existing lines?

A transformer changes the voltage level of electricity — for example, from 30,000 volts (30 kV) down to 20,000 volts (20 kV) — so it can be distributed to homes and businesses. As new areas or renewable energy installations are connected, engineers often attach a new transformer at the end of an existing cable rather than building a completely new substation.

Two things that make this tricky

1. Phase shift: Transformers don’t just change voltage — they also shift the timing of the electrical wave. The protection relay on one side sees the current slightly out of step with the relay on the other side. Without correction, this looks like a constant fault. The relay must be programmed to apply the right correction factor.

2. The tap changer: Most transformers can fine-tune their output voltage using an automatic mechanism called an On-Load Tap Changer (OLTC). Each step changes the current ratio by about 1–2%. The protection settings must cover the full range of tap positions while still being sensitive enough to catch real faults.

Where to put the sensors?

5. Challenge C: T-Junction + Transformer

This is the most complex case — a T-shaped line where one branch connects to a transformer. You now need four protection relays, all communicating with each other.

The system must handle everything from Challenges A and B at the same time:

• Balancing currents across three cable branches
• Correcting for the transformer’s phase shift
• Staying stable across all tap changer positions
• Correctly interpreting cable shield currents

It’s a lot — but modern protection hardware and software can handle it, provided it’s set up correctly.

6. Does It Actually Work? Simulation Results

Before deploying these systems on a real power grid, engineers test them in computer simulations (MATLAB/Simulink). The key test for each scenario: does the protection correctly trip (switch off) when there’s a fault inside the protected zone, and correctly stay on when the fault is outside?

Challenge B: Fault outside the protected zone

Challenge B: Fault inside the cable

Challenge B: Fault at transformer input terminals

Challenge A: Fault outside the T-cable area

Challenge A: Fault inside the T-cable area

Challenge C: Summary result

In every case, the extended ANSI 87L algorithm correctly identified whether the fault was inside or outside the protection zone. No false alarms, no missed faults.

7. Key Lessons

The basic principle still works — but needs adaptation

The ‘what goes in must equal what comes out’ principle is still valid for all three configurations. What changes is the implementation: more sensors, more communication between devices, and more sophisticated calculations.

Sensor placement is critical

You can’t just put the current sensors anywhere convenient. The rule is straightforward: sensors must be placed at every point where current can enter or leave the protected zone. Getting this wrong doesn’t just reduce effectiveness — it can make the protection completely blind to certain types of faults.

Cable shield currents are useful, not a nuisance

Engineers sometimes see shield currents as an unwanted complication. In reality, they’re a valuable signal. During an internal cable fault, shield currents spike to levels that are easy to distinguish from normal operation. A well-designed system uses this as an extra early-warning indicator.

The tap changer must be factored in from the start

If a transformer with an automatic tap changer is included in the protected zone, the protection settings must cover the full range of tap positions. A setting that works fine at mid-range may cause false trips at the extremes. The safest approach is to verify this through simulation before the system goes live.

8. Conclusion

Line Differential Protection is one of the most reliable safety tools in the power engineer’s toolkit — it’s fast, accurate, and robust. These qualities don’t disappear as power grids become more complex, but they do require more careful engineering to preserve.

The three challenges described in this article reflect real trends: more underground cable, more renewable energy connections, and more complex layouts driven by the need to expand grids without always building entirely new infrastructure.

The good news is that all three configurations can be safely and reliably protected with modern systems — as long as engineers follow these principles:

• Define the protection zone clearly and put sensors at every boundary point.
• Account for the cable shield grounding method in the protection algorithm.
• Apply the correct correction for the transformer’s phase shift.
• Design the settings to remain stable across the full tap changer range.
• Use simulation to verify everything before commissioning.

Arc Flash Risk Assessment

Risk assessment. What can be done to ensure that it does not become merely a formal obligation – a forgotten sheet in a binder or an exercise in creative table filling? This article is devoted to this issue.

Although the starting point is electrical hazards – in particular the risk of electric arc – the issues discussed are universal. In practice, risk assessment in electrical work is a difficult area to properly address. Is it even possible to capture its specificity in a simple, repeatable, and useful way?

In this article, we will discuss:

•  What is the difference between hazard analysis and risk assessment?

•  What are the consequences of weak processes?

• What can be done differently to make risk assessment actually work.

Hazard analysis and risk assessment – what is the difference?

The terms hazard and risk are often used interchangeably. I have heard many times—and I have to  admit that I have also used—phrases such as “this is a major hazard” or “this is high-risk work.” They sound similar, but in fact they are different concepts.

Based on the approach of ISO 45001, PN-N-18001, and NFPA 70E, we can adopt simplified but very useful definitions:

• Hazard – a source of potential injury or deterioration of health. In electrical work, these include electric arc energy, electric shock, electromagnetic fields, and electrostatic charges.
• Probability – the chance or frequency of a given event occurring within a specified period of time (day, month, year).
• Risk– combination of hazard and probability of its occurrence.

This is most often written in simplified form:
Risk = Hazard × Probability

This is where resistance often arises: “It’s not gambling or poker – why do we need probability?” Ironically, the English word “hazard” means in polish  “gambling.” But let’s leave word games aside.

What hazard and risk mean in practice?

Hazard and risk are inseparably connected, but only by separating them do we gain real practical value.

Example:
The level of hazard from an electric arc is 7.6 cal/cm² (arc flash  incident energy). This is a calculated value and difficult to dispute. However, the probability depends on what activities we perform, under what conditions, and on what equipment. What’s more, not every accident is the result of human error.

To assess this, we need a system: data, criteria, and a tool, such as a risk matrix.

The grey zone of probability

It’s hard to argue about the level of hazard — it’s numerical and measurable.
Probability, however, is a different story. In my experience, this is exactly what creates the so-called grey zone of risk assessment. Data is lacking, and subjective judgment easily leads to manipulating the outcome.

Example:
Voltage measurement on the main busbars of a 415 V / 2000 A switchgear, with an arc flash incident energy ( hazard )of 7.6 cal/cm².

Let’s assume a 3×3 scale:

• Hazard: arc flash – medium (2)

• • Probability: high (3)

Risk = 2 × 3 = 6 

However, it is enough to arbitrarily reduce the probability to 1 for the risk to drop to 2 or 4. The difference is huge – and it may determine whether additional control measures or protective actions will be implemented.

Consequences of incorrect risk assessment

An overly general assessment leads to:

• broad scope for interpretation of results,

• actions that are not applicable to actual risk,

• loss of employee confidence in the entire procedure,

• more serious injuries due to a lack of adequate protection,

• lack of repeatability.

On the other hand, an overly detailed assessment results in:

• mental overload for employees,

• impractical process,

• implementation resistance

• increased time and costs.

How to limit subjectivity?

Risk assessment will never be completely objective – but subjective part can be significantly reduced by:

• initial visual inspection,

• analysis of tasks performed,

• assessment of the technical condition of equipment,

• consideration of human factors,

• decision paths preparation

• PPE pre-selection

The goal should be simple, practical tools, not more procedures “on paper.”

Task-based PPE Selection Matrix – practical example

One such tool is the Task PPE Risk Matrix implemented by MR Power Systems. This is not a universal solution—it was designed for specific requirements and working environments—but it perfectly illustrates a practical approach.

The matrix takes into account, among other things:

• condition of equipment, 

• type of hazards (arc flash, electric shock), 

• list of tasks performed, 

• preselection of PPE, 

• probability assessment, 

• final risk assessment. 

As a result, most of the analytical work has been done in advance by specialists. The employee receives a tool that is ready to use.

How to create an electrical work risk assessment?

The presented model uses several key indicators:

• equipment assessment (condition, inspections, documentation),
• risk assessment (arc flash study, electric shock),
• list of tasks performed (e.g., from the electrical safety plan or operating manuals),
• PPE preselection matrix based on hazard assessment
• risk assessment.
  

What can be done about it?

Condition of equipment:

1.    The device is correctly installed.

2.    The device is properly maintained.

3. The device is adapted to the available short-circuit current.

4. The device is used in accordance with the manufacturer’s documentation or instructions.

5. The device doors are closed and secured.

6. All covers are in place and secured.

7. There are no signs of an impending failure

Task list:

• determining what work will be performed,

• assessing whether the work involves any specific hazard.

Wymagane poziomy ŚOI: 

• preselection of PPE for use on the customer’s premises,

• specification of PPE protecting against electric arc burns,

• minimum PPE requirements (e.g., for subcontractors),

• specification of PPE protecting against electric shock,

• system for selecting and using PPE (e.g., multilayer, all-day, dedicated).

Determining likelihood:

• determination based on data or work analysis,
• assignment in a matrix (e.g., 2×2),
• determination of the impact of equipment condition on probability

Hazard level

It refers to the incident energy level. There are several methods — and at least three common approaches — to determine it:

• Performing detailed arc-flash incident energy calculations (e.g., IEEE 1584, DGUV 203-077, DC calculation models)
• Using table-based approaches (e.g., NFPA 70E, CSA Z462)
• Applying predefined or pre-calculated incident energy values

Each approach has its benefits, but the key requirement is to obtain a dependable estimate of the potential arc-flash hazard. Among these options, the IEEE 1584 calculation method is the most comprehensive and is widely considered the preferred standard.

Example of arc flash pre-calculation

Because each stage carries the risk of error, this approach is suitable only when applied under strict oversight and should not serve as the primary method for determining arc-flash incident energy.

The final result

Ultimately, we obtain a PPE selection matrix for the work to be performed. It takes into account the condition of the switchgear, the type of work performed, exposure to live parts (e.g., unshielded busbars or cable terminals), and the level of risk.

In this form, most of the analytical work has already been done by a specialist team. The tool can be easily verified based on real events or accidents. In the case described, the matrix was prepared for a large group working in service mode (i.e., not on their own installation). The list of tasks has been grouped and simplified to correspond to real situations.

Inherent and residual risk – and the role of the control hierarchy

In classic risk assessment, we always talk about the situation before and after the application of mitigating measures. In the case of the task matrix, this pre-selection has been done in advance.

Here, it is worth referring to the control hierarchy according to NFPA 70E, which clearly shows that PPE is the last line of defense, not the only solution. Technical, organizational, and procedural measures are of key importance.

Two perspectives – one goal

From the perspective of:

• the employer – we implement solutions and eliminate risks,

• the employee – we use the measures provided.

From the perspective of an employer, health and safety department, chief power engineer, or consultant, the process is the opposite of that from the employee’s point of view. First, we analyze how to eliminate or reduce the hazard, and then we expect the implemented solutions to be applied.

In practice, some measures only require technical implementation, while others require acceptance and understanding on the part of the staff. Although resistance to change is natural, solutions whose purpose is clearly communicated work best.

The matrix can be expanded to include a preselection of measures to reduce the risk or probability, which is justified because the employer bears the responsibility and has a decisive influence on the selection of solutions.

In practice, the biggest challenge is not technology, but acceptance of change. My experience shows that resistance is lower when people understand why we are implementing something.

Conclusions

• Probability should be based on data and analysis, not intuition.

• Matrices allow you to clearly define the minimum requirements for PPE.

Summary

The selection of PPE can only be made on the basis of a risk assessment. However, ignoring work procedures, the condition of equipment, and employee experience, it is easy to end up in a situation where we use full protection “always and everywhere.” Paradoxically, a well-designed matrix limits the use of PPE to places where it is really needed—and not where we are simply “afraid” to do something.

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Rising Importance of Electrical Safety in the Workplace 

Electrical safety importance is growing  year after year. It is not only about compliance with standards and regulations, but also about responsibility of electrical engineers, managers, and employers.  Electrical safety awareness is important for production continuity and  safety culture at work. This very issue was the focus of the Electrical Safety Conference Europe 2025 (ESC EU), held on October 23–24 in Cracow. 
The event, organized by MR Power Systems, brought together experts from across Europe — representatives of industry, technical organizations, and  solution suppliers.  

Arc Flash Risk Assessment and Practical Protection Strategies 

Over the course of two days in Cracow, the discussions centered around the most pressing topics in the field: arc flash protection, electric shock risk assessment, the implementation of modern personal protective equipment, and the interpretation of current and emerging European standards. The focus was on practice over theory. 
Experts emphasized that while standards and regulations provide a necessary framework, the true challenge begins with their implementation in the workplace. That is when experience, awareness, and collaboration between engineering, maintenance, and safety departments become crucial. 

Sylwester Linowski & Adrian Ciok, Hubix

Engineering Insights: Arc Flash Hazards Still Underestimated 

Participants agreed that arc flash remains one of the most significant hazards in electrical environments , just after electric shock hazard which is leading electrical hazard. Arc Flash consequences can be catastrophic, while awareness of its risks in many facilities remains insufficient. 
Speakers — including engineers with extensive experience in electrical safety,  electrical systems and safety professionals— highlighted the need for comprehensive risk assessments and the proper selection of PPE, adapted to specific working conditions. 
Presentations also underscored the importance of personnel training, human factors and the creation of procedures that shape a true safety culture within organizations. 

Innovative Electrical Safety Technologies at the Expo Zone 

ESC EU 2025 conference was not limited to technical lectures. The expo area showcased a wide range of innovative solutions — from arc flash detection systems, diagnostic and measurement equipment, to protective clothing and tools which enhance electrical safety. 
Exhibitors and participants had the opportunity to engage directly, exchange experiences, and establish valuable business relationships. For many attendees, networking proved to be one of the most valuable aspects of the event, fostering collaboration between industry, technology providers, and consulting organizations. 

Networking, Regulation Trends, and the Future of Safe Energy Systems  

The atmosphere throughout the conference was both professional and inspiring. 
In informal discussions, attendees reflected on the upcoming changes in European electrical safety regulations, the future of electrical infrastructure, Battery Energy Storage Systems (BESS), PV systems, EV cars and ongoing life electrification. All of this requires proper approach to electrical risk assessments 
There was also much discussion on the growing role of digitalization in monitoring and analysing electrical systems — from smart sensors to integrated digital twin platforms. 

Electrical Safety as a Strategic Priority for Industry   

The Electrical Safety Conference Europe 2025 in Kraków demonstrated that electrical safety today is not an isolated discipline — it is a strategic one. 
It requires awareness, a systemic approach, and collaboration across organizational boundaries. 
Participants left Kraków not only with the latest knowledge and inspiration, but also with a clear view that investing in safety means investing in the future — of both people and the installation.

Gratitude to Sponsors and Partners Supporting Workplace Safety 

The conference would not have been possible without the support of our Partners and Sponsors. 
We extend our sincere thanks to: 
stuckeGROUP, Hubix, TRANEMO Advanced Workwear, DEHN SE, Aktywizacja, Acteq, ArcSwitch, BCA Engineering Group, BSD Bildungs- und Servicezentrum GmbH, EATON, Etap, Grace Technologies, Megger Sp. z o.o., SPIE Energotest, as well as our Technical Partners — ArcelorMittal and the Polish Committee for Electrical Safety SEP. 

Special thanks also go to our Media Partners: 
ATEST Ochrona Pracy, Bezpieczeństwo Pracy. Nauka i Praktyka (CIOP-PIB), CIRE.pl – Energy Market Information Center, INPE, WysokieNapiecie.pl, and ZIAD Bielsko-Biała S.A. 

Electrical Safety Conference Europe – Workplace Electrical Safety & Arc Flash in Europe

Electrical safety is not only a legal requirement or a forced necessity. It is a matter of responsibility for the health and life of employees as well as the continuity of production in every industrial plant. The experts at MR Power Systems know this well, as they have been engaged for years in professional risk analyses, electrical installation audits, and the implementation of comprehensive protective solutions. This is why, as MR Power Systems, we are organizing a unique event dedicated to workplace electrical safety and arc flash hazards in Europe – Electrical Safety Conference Europe 2025 (ESCEU). 

Electrical Safety Conference Europe 2025 23–24 October 2025 |
Premier Kraków Hotel, Adress: Opolska 14a, 31-323 Cracow, Poland

Why ESC EU and why MR Power Systems?  

The idea of the conference was inspired by the popular ESW IEEE (Electrical Safety Workshop) event organized in the United States since the 1990s. Initially, we simply wanted to bring this format to Europe, but during the preparations it became clear that we needed something of our own. An event with an approach tailored to the specifics of the European market and the challenges we face in Europe. MR Power Systems, as an expert in electrical safety and arc flash protection in Europe, took on the challenge of creating a unique conference that would become a platform for sharing experiences, knowledge, and best practices. 
Our goal is not only education, but above all, a real improvement of working conditions, minimizing the risk of accidents, and increasing the awareness of technical and managerial staff in the field of electrical hazards. 

Who is ESC EU for? 

The conference is dedicated to everyone for whom workplace electrical safety is a key element of operations. This includes, among others: 

• Representatives of maintenance departments and people responsible for the operation of electrical installations.
• People managing the operation of electrical installations in industrial plants, utilities, PV, Wind, BESS installations.
• Electrical safety specialists and occupational health and safety specialists.
• Public safety institutions.
• Manufacturers of technical solutions and arc flash protection equipment for electrical safety.
• Specialists, experts, and consultants in the electrical industry.

Conference topics – practice over theory 

At Electrical Safety Conference Europe, we focus above all on practical workplace electrical safety solutions. We will address topics broadly related to electrical safety. This edition emphasizes arc flash hazards and electric shock hazards (risk). We place great importance on the simplicity of knowledge transfer, as we want it to also reach those who are new to the subject. We know how challenging these issues can be, and we will cover, among others:

• Risk analysis related to the threat of electric shock and arc flash hazards in Europe.
• Selection and proper use of personal protective equipment (PPE) for arc flash protection.
• Review of technical solutions improving electrical safety in Europe.
• Modernizations and optimizations of electrical installations in terms of safety.
• Experiences from the European market in various areas.
• Modern technologies for mitigating the effects of arc flash.
• Case studies – best practices and common mistakes.
• Legislative updates – European standards for electrical safety.
• Electrical Safety Plan for workplaces – first steps, how to begin.

Example of a practical situation – what can go wrong? 

Imagine that one of the main low-voltage switchboards, 415 V, has an arc flash energy level exceeding 40 cal/cm², which in practice means extremely high consequences of severe burns or even fatal accidents. From the outside, the switchboard looks fine – the problem can only be detected during a detailed assessment and analysis. What will happen if a failure occurs under such conditions? What will be the consequences for your company and your people? And what if we don’t even know that the potential hazard is over 40 cal/cm²? 

At the conference, we will show practical solutions – you will learn how to detect such threats early, apply modern arc flash protection solutions, and reduce risks effectively.

How will ESCEU help participants? 

Participation in the conference will bring you concrete benefits: 

• Gain practical knowledge from top European experts.
• Learn best practices for workplace electrical safety and arc flash protection.
• Network with solution providers and industry leaders.
• Improve your company’s compliance with electrical safety standards EU.

Join ESC EU 2025 – put electrical safety first 

The Electrical Safety Conference Europe 2025 will take place on October 23–24, 2025, in Kraków. Don’t miss this opportunity to stay ahead – book your place at esceu.eu today! 

Remember, electrical safety is an investment that always pays off.