1. Introduction

Electrical safety is a fundamental component of the operation of industrial machines. The EN 60204-1 standard (the latest valid version EN 60204-1:2018) defines the requirements for the electrical equipment of machines aimed at protecting personnel from electric shock, as well as preventing equipment damage and fires. Adherence to this standard is critical to ensuring the continuity of production processes and meeting the requirements of the EU Machinery Directive (2006/42/EC). In the conditions of Ukrainian production, the integration of EN 60204-1 norms allows to harmonize safety standards with European requirements, which increases the overall level of equipment reliability.

2. Scope of application

The standard applies to electrical, electronic and programmable electronic equipment of machines that are not carried by hand during operation. The scope covers equipment operating at a rated supply voltage of up to 1000 V AC or 1500 V DC. This includes: production lines, metalworking machines, packaging equipment, transportation systems and automated complexes. The standard applies to the power supply connection points to the machine.

3. Basic requirements

EN 60204-1 sets clear parameters for design, installation and maintenance. The main requirements are summarized in the table below:

4. Impact on MRO operations

The implementation of EN 60204-1 requirements significantly changes approaches to maintenance and procurement (MRO). First of all, the engineering documentation must be updated and complete. Any changes in the electrical circuit (upgrading, replacement of components) require re-checking for compliance with the standard. Procurement activities should focus on components that have the appropriate certificates (CE, EN), which guarantees their reliability and compatibility with safety requirements. Maintenance becomes more systematized: scheduled checks of grounding, isolation and functioning of safety systems become mandatory stages.

5. Requirements for components

The use of non-certified components increases the risk of accidents. Specific requirements apply to the following elements: - **Electric motors:** Must have an appropriate protection class (IP) and meet thermal loads. - **Emergency buttons:** Must be mechanically reliable, with forced opening of contacts. - **Cables:** Must be resistant to oils, coolants and mechanical influences (according to environmental conditions). - **Switching equipment:** Must ensure reliable separation of power circuits.

6. Safety checklist for the maintenance engineer

For a quick assessment of the condition of the machine, it is recommended to use this list:

1. Checking the integrity of the protective earth (PE).
2. Measurement of insulation resistance of power and control circuits (not less than 1 MΩ).
3. The functionality of the emergency buttons and checking the machine stop time.
4. Protection against automatic or accidental start after power recovery.
5. Checking the conformity of the ratings of fuses and circuit breakers with the design data.
6. Correspondence of marking of cables and terminals to diagrams.
7. Checking the degree of IP protection of control cabinets (absence of dust and moisture).
8. Availability of cabinet door locks (automatic shutdown upon opening).
9. Color coding of conductors according to EN 60204-1.
10. Functioning of safety limit switches.
11. Absence of exposed conductive parts in the access area.
12. Cable insulation condition (absence of mechanical damage and overheating).
13. Reliability of screw and spring terminal connections.
14. Checking the operation of the status light indicators.
15. Availability and relevance of basic electrical diagrams right next to the machine.
16. Logging of the results of scheduled earthing measurements.

7. Common cases of inconsistency

During audits, the following are most often detected: - Bypassing or blocking of protective limit switches by personnel to "increase productivity". - Using jumpers or "bugs" instead of certified fuses. - Violation of the integrity of the control cabinet housing (open holes for cables). - Inconsistency in the colors of the wires (for example, the use of yellow-green color for phases). - Absence of current schemes, which complicates diagnostics and increases risks during repair.

8. Liability and Consequences

Failure to comply with safety regulations has serious consequences. In Ukraine, this is regulated by the Law "On Labor Protection". Consequences include: - **Administrative fines:** Issued by the labor inspectorate to the enterprise and responsible persons. - **Suspension of production:** In case of detection of critical inconsistencies, operation of the equipment is prohibited until they are eliminated. - **Civil-legal liability:** Compensation for damages in case of injury to employees. - **Cancellation of insurance payments:** Insurance companies can refuse payments if the cause of the accident was the use of equipment in violation of safety regulations.

9. Conclusion

The EN 60204-1 standard is not only a formal requirement, but a necessary tool to ensure the safety and reliability of production. Every element of the system — from the cable to the programmable logic controller — must meet the established criteria. The UNITEC-D company ensures the supply of exclusively certified components that meet modern technical standards, helping your company maintain the highest level of safety. To select reliable and compatible components, visit UNITEC-D E-Catalog.

10. Links

• EN 60204-1:2018 Safety of machinery — Electrical equipment of machines — Part 1: General requirements.
• ISO 13849-1:2015 Safety of machinery — Safety-related parts of control systems.
• Directive 2006/42/EC on machines and mechanisms.

Introduction: The importance of EN 60204-1 for industrial enterprises

In today's industry, ensuring the electrical safety of machines is a critically important aspect for the protection of personnel, equipment and the continuity of production processes. Standard EN 60204-1 "Electrical equipment of machines. Part 1: General requirements" (harmonized with IEC 60204-1) is a cornerstone in the design, installation and maintenance of electrical systems of industrial equipment. Its application not only complies with the legislative requirements of Ukraine regarding labor safety (for example, the Law of Ukraine "On Labor Protection" and relevant legal acts), but also minimizes the risks of accidents, downtime and financial losses.

This standard defines the general requirements for the electrical equipment of machines to ensure the safety of operators and service personnel from electric shock, as well as the safety of the functioning of the equipment. Failure to follow these requirements can result in serious consequences, including personal injury, death, property damage, and significant fines. For Ukrainian industrial enterprises seeking integration into the European market and increasing competitiveness, compliance with EN 60204-1 is a mandatory prerequisite.

Scope and relevance

Who must comply and what equipment is covered by the standard

The EN 60204-1 standard applies to electrical and electronic equipment of machines, including group machines, which are not manual and do not move during operation. It covers a wide range of industrial equipment, from metalworking machines to packaging machines, conveyor systems and robotic complexes. The main industries covered by it include mechanical engineering, metallurgy, food industry, chemical industry, energy and other sectors where electrified equipment is used.

Compliance with the standard is mandatory for:

• Machine manufacturers: during design, production and initial conformity assessment (for example, for CE or UkrSEPRO marking).
• System integrators: when integrating individual machines into production lines.
• Owners and operators of machines: during installation, commissioning, maintenance, modernization and repair of equipment.
• Occupational health and safety supervision bodies: during inspections and inspections.

The standard applies to electrical equipment operating with a rated voltage of up to 1000 V AC and up to 1500 V DC, with a rated frequency of AC up to 200 Hz. It does not cover requirements for electrical systems of buildings or equipment located underground, and equipment intended for use in potentially explosive atmospheres, for which separate specialized standards exist (for example, the EN 60079 series).

Key requirements of the EN 60204-1:2018 standard

The EN 60204-1:2018 standard (also harmonized in Ukraine as DSTU EN 60204-1) contains detailed provisions covering all aspects of the electrical equipment of machines. Below is a summarized table of the main requirements:

Impact on maintenance and repair (MRO) operations

Implementing and maintaining EN 60204-1 compliance requires systemic changes in enterprise MRO practices. This applies not only to initial installation, but also to day-to-day maintenance, component replacements and upgrades.

Changes in maintenance

• Regulatory checks: The need for regular checks of electrical equipment, including insulation resistance measurements, grounding checks, operation of emergency stop devices. The frequency of inspections must comply with the requirements of the standard and national regulations (for example, PTEES).
• Documentation: Maintaining detailed service logs, test reports and updating wiring diagrams after any modifications. This is critical for auditing and tracking changes.
• Training of personnel: Mandatory training and certification of electrical personnel regarding the requirements of EN 60204-1, rules for the safe operation of electrical installations and the use of personal protective equipment (PPE).

Purchasing components

• Certified spare parts: Priority for the purchase of electrical components that have appropriate certificates (CE, UkrSEPRO) and comply with IEC, EN standards (for example, contactors according to IEC 60947, automatic switches according to IEC 60898/60947-2). Non-certified or non-compliant components may compromise the machine's safety and invalidate its compliance.
• Manufacturer: Selection of reliable suppliers who can provide full technical documentation and confirmation of product conformity.

Documentation and labeling

• Updating schematics: Any changes in electrical equipment must be reflected in the updated electrical schematics.
• Clear marking: All electrical components, cables, terminals, control devices must be clearly and permanently marked according to EN 60204-1 and EN 81346 (marking rules).

Requirements for components

Choosing the right electrical components is the basis for compliance EN 60204-1. Every piece of electrical equipment in a machine must meet established safety and performance standards.

• Switchgear: Circuit breakers, contactors, overload relays must comply with the IEC 60947 series of standards (for example, IEC 60947-2 for circuit breakers, IEC 60947-4-1 for contactors). They must have sufficient switching capacity and wear resistance for the intended operating conditions.
• Emergency stop devices: STOP buttons must comply with EN ISO 13850 and have an appropriate safety category (e.g. Category 3 or 4 according to EN ISO 13849-1) that ensures reliable stopping of dangerous traffic.
• Electrical cables and conductors: Must comply with EN 50525 (for general purpose cables) and other relevant standards. It is necessary to take into account the cross-section of the conductors, the type of insulation (for example, PVC, rubber), the nominal voltage, the temperature regime and the mechanical resistance. Flexible cables for moving parts must be highly resistant to bending and abrasion.
• Cabinets and cases: The degree of protection against external influences (dust, water) must correspond to EN 60529 (IP code). For example, most industrial applications require a degree of protection of at least IP54.
• Terminals and connectors: Must match EN 60947-7-1/2 (terminal blocks), ensuring a reliable and safe electrical connection.
• Sensors and limit switches: Depending on the safety function, they must comply with the relevant parts EN 60947-5-1 and have the appropriate performance level (PL) or safety category.
• Protective devices: Type A or B protective disconnecting devices (in accordance with IEC 61008/61009) for additional protection against electric shock.

All these components must be marked for compliance with national or international standards (for example, CE, UkrSEPRO). UNITEC-D offers a wide range of certified electrical components that meet the highest safety and reliability standards, simplifying the compliance process for our customers.

Compliance Checklist for Maintenance Managers

This checklist will help you assess the compliance of the electrical equipment of the machines at your company with the requirements of EN 60204-1 and Ukrainian regulations:

1. Are current wiring diagrams and technical documentation available for each machine?
2. Do all machines have clearly marked and easily accessible emergency stop devices (red button on a yellow background)?
3. Do all emergency stop devices function properly and provide an immediate stop to dangerous traffic?
4. Is the main power switch interlocked in the off position to prevent accidental activation during service?
5. Is the regularity and reliability of the grounding (PE-conductor) of all exposed conductive parts checked?
6. Is the insulation resistance of electrical equipment periodically checked (according to EN 60204-1: minimum 1 MΩ at 500 V DC)?
7. Do all electrical cabinets and enclosures have an appropriate degree of IP protection (eg IP54) against dust and water?
8. Is there sufficient space in the cabinets for safe maintenance and heat dissipation?
9. Are all conductors and cables clearly marked according to the diagrams?
10. Does the cross-section of the conductors correspond to the current load and the length of the line, taking into account the permissible voltage drop?
11. Are certified circuit breakers and thermal protection relays used to protect motors and lines from overloads and short circuits?
12. Are the personnel servicing the electrical equipment properly trained and have an electrical safety clearance group?
13. Are appropriate PPE available and used (gloves, safety glasses, tools with insulated handles)?
14. Are all warning labels and information labels (eg hazardous voltage) affixed to the equipment and legible?
15. Are surge protective devices (SPDs) installed and functioning as required by operating conditions?
16. Is there an appropriate interlock system for the control cabinet doors to prevent opening under voltage?
17. Do all components (contactors, relays, buttons) have appropriate certificates (CE, UkrSEPRO) and comply with IEC/EN standards?
18. Is a log of tests and inspections of electrical equipment kept?
19. Is a risk analysis carried out to determine the necessary safety measures according to EN ISO 12100 and EN ISO 13849-1?
20. Is the electromagnetic compatibility (EMC) of the machine ensured with other equipment in production according to EN 61000?

Mismatch issues are common

Audits and inspections of machine electrical equipment often reveal typical violations EN 60204-1. Understanding these problems helps businesses prevent them from occurring:

• Insufficient grounding: Absence or poor grounding of exposed conductive parts, high resistance of the grounding circuit.
• Mismatch of emergency switches: Improper location, lack of locking, improper marking or failure of emergency stop buttons.
• Lack of interlocks: The possibility of access to dangerous live parts due to the absence or malfunction of electrical interlocks of cabinet doors or protective fences.
• Incorrect selection of components: Use of components that do not meet the nominal parameters (current, voltage, type of load) or do not have the necessary certificates.
• Violation of insulation integrity: Damage to the insulation of cables, conductors, which can lead to short circuits and electric shock.
• Insufficient degree of IP protection: Use of cabinets and equipment with a low degree of protection in conditions of increased dustiness or humidity, which leads to failures and danger.
• Out-of-date documentation: Inconsistency of the actual wiring diagram with the available documentation, which complicates maintenance and diagnostics.
• Improper marking: Absence or unclear marking of conductors, terminals, control devices, which leads to errors during maintenance.
• Line overloading: Use of conductors of insufficient cross-section or inadequate protective devices, resulting in overheating and risk of fire.
• Absence or malfunction of RCDs: Protective disconnecting devices (RCDs) are missing or not checked regularly.

Penalties and liability

Non-compliance with the requirements of EN 60204-1 and Ukrainian regulatory acts harmonized with it entails serious legal and financial consequences for the enterprise and its officials.

Administrative and criminal liability

• Fines: According to the Code of Ukraine on Administrative Offenses, violation of the requirements of labor protection legislation may result in the imposition of fines on company officials. Fines can reach tens of thousands of hryvnias, depending on the severity of the violation.
• Suspension of work: State supervisory bodies (for example, State Labor) have the right to suspend the operation of machines and equipment that do not meet safety standards, until the violations are completely eliminated. This leads to significant downtime and lost revenue.
• Criminal responsibility: In the event that the violation of safety requirements led to serious consequences (injuries, deaths), officials may be held criminally liable in accordance with Article 271 of the Criminal Code of Ukraine "Violation of the requirements of the legislation on labor protection", which provides for imprisonment for a term of up to seven years.

Civil liability and insurance risks

• Indemnification: The company is responsible for damage caused to the health or property of employees or third parties due to the operation of dangerous equipment. Compensation amounts can be significant and include medical expenses, lost earnings, moral damages.
• Rejection by insurance companies: In the event of an accident caused by non-compliance of equipment with safety standards, the insurance company may refuse to pay insurance compensation if it is proven that the company did not comply with the established norms.
• Reputational losses: Incidents related to security breaches can cause irreparable damage to a company's reputation, affecting its market position and relationships with partners.

For example, an accident caused by a malfunctioning emergency stop button that does not comply with EN ISO 13850 can cost a company millions of hryvnias in compensation and fines, not to mention human losses. A systematic approach to compliance is an investment in security that pays off in lives saved, reputation and business stability.

Conclusion

Compliance with the EN 60204-1 standard is not just a formal requirement, but a fundamental basis for the safe and efficient operation of industrial machines. It requires an integrated approach at all stages of the life cycle of the equipment - from design and installation to regular maintenance and repair. Investing in certified components, qualified personnel and up-to-date documentation is critical to minimizing risks, ensuring continuity of production and avoiding serious legal and financial consequences.

UNITEC-D is your trusted compliance partner. We offer a wide range of high-quality, certified electrical components that meet the strictest international and Ukrainian standards. With our products, you can be sure of the reliability and safety of your equipment.

Visit the UNITEC-D E-Catalog to view our range of certified electrical components and find solutions to ensure flawless electrical safety in your production.

Sources of information

1. EN 60204-1:2018 Safety of machinery - Electrical equipment of machines - Part 1: General requirements.
2. DSTU EN 60204-1:2019 Machine safety. Electrical equipment of machines. Part 1. General requirements (EN 60204-1:2018, IDT).
3. IEC 60364-4-41 Low-voltage electrical installations - Part 4-41: Protection for safety - Protection against electric shock.
4. EN 60947 series Low-voltage switchgear and controlgear.
5. EN ISO 13849-1 Safety of machinery - Safety-related parts of control systems - Part 1: General principles for design.
6. EN ISO 13850 Safety of machinery - Emergency stop function - Principles for design.
7. Code of Ukraine on administrative offenses.
8. Criminal Code of Ukraine.
9. Rules for the technical operation of consumer electrical installations (PTEES).
10. Law of Ukraine "On Labor Protection".