Study of fire hazards in electrical connections of various types
Kalchenko Yaroslav
National University of Civil Protection of Ukraine
https://orcid.org/0000-0002-3482-0782
Oliinyk Volodymyr
National University of Civil Protection of Ukraine
https://orcid.org/0000-0002-5193-1775
Borsuk Olena
National University of Civil Protection of Ukraine
https://orcid.org/0000-0001-5759-4506
Kostyrka Olesia
National University of Civil Protection of Ukraine
https://orcid.org/0000-0002-3225-6604
Kirichenko Ilya
National University of Civil Protection of Ukraine
https://orcid.org/0009-0006-2579-9017
DOI: https://doi.org/10.52363/2524-0226-2026-43-13
Keywords: lamp temperature, overvoltage, undervoltage, fire hazard
Аnnotation
Studies have been conducted to determine the temperature of electric lamps of various types in emergency modes of operation of power grids, namely overvoltage. Graphs of the dependence of the temperature of the bulb of incandescent lamps, arc mercury lamps and LED lamps on the voltage applied to them. Mathematical models of the value of the heating temperature of the bulb of the electric incandescent lamp, the arc mercury lamp and the LED lamp are obtained depending on the time. It is determined that the temperature of the bulb of the incandescent electric lamp increases exponentially and stabilizes after about 300 seconds. The temperature of an arc mercury lamp also varies exponentially, but, compared to an incandescent lamp, it is not so fast, but stabilizes after about 600 seconds. It is determined that in emergency modes of operation, the temperature of incandescent lamps and arc mercury lamps may exceed the normative values of temperature groups, as a result of which, when used in environments where explosive gases or vapors are present, they can become a source of ignition and lead to explosion or ignition of these substances. It is determined that the temperature of the LED lamp changes according to the linear law and after 300 seconds stops growing. Temperature dependencies of different elements of the LED lamp are built depending on the electric voltage applied to it. It was found that the driver, namely the power control chip, heats up most when the LED electric lamp is operating. It is determined that when the electric voltage decreases, the power control chip heats up more, but not significantly. It was found that the LED lamp is the best from the point of view of fire safety, since it has the lowest temperature, and also the change in the voltage of the electrical network reacts the least, which is explained by its design and principle of operation.
References
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Received by the editorial board: 10.03.2026
Accepted for publication: 13.04.2026
Date of publication (release): 31.05.2026
Didovets Iurii
National University of Civil Protection of Ukraine
https://orcid.org/0009-0003-2757-7299
Kozhemiaka Oleksiy
National University of Civil Protection of Ukraine
https://orcid.org/0009-0008-1064-9213
Lazorenko Oleksiy
National University of Civil Protection of Ukraine
https://orcid.org/0009-0005-3569-2208
Mykhailovska Yuliia
National University of Civil Protection of Ukraine
https://orcid.org/0000-0003-1090-5033
DOI: https://doi.org/10.52363/2524-0226-2026-43-12
Keywords: digital technologies, geographic information systems, humanitarian demining, spa-tial analysis, unmanned platform
Аnnotation
The article substantiates a scientific and applied approach to integrating digital technologies and geographic information systems into humanitarian demining processes. It shows that moving from fragmented use of individual digital tools to a coherent digital geospatial ecosystem significantly improves decision quality during non-technical survey, technical survey, clearance, quality assurance and land handover. The key components of such integration are identified as standardized digital data, geospatial models, satellite and aerial imagery, unmanned platforms, mobile field data collection tools, analytical dashboards, spatial prioritization algorithms and decision-support systems. A mathe-matical framework is proposed for assessing the digital-geospatial maturity of an operator, prioritizing hazardous areas and forecasting operational productivity depending on data quality, information la-tency, contamination uncertainty and terrain accessibility. It is argued that the practical effect of in-tegration lies in reducing the time needed for field-data processing, increasing the precision of haz-ardous-area boundaries, decreasing duplicated routes, improving resource allocation and strengthening reporting transparency. The scientific novelty lies in the development of an integrated model combin-ing a digital-geospatial maturity coefficient, a data –quality index, a spatial-priority index and an ex-pected operational-efficiency function. The practical significance of the results lies in the possibility of applying the proposed provisions to humanitarian demining management, personnel training, digi-tal architecture design and information-management improvement under conditions of large-scale contamination by explosive ordnance in Ukraine. The model is adaptable to national and operator-level workflows.
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Received by the editorial board: 10.03.2026
Accepted for publication: 13.04.2026
Date of publication (release): 31.05.2026
Durieiev Viacheslav
National University of Civil Protection of Ukraine
https://orcid.org/0000-0002-7981-6779
Oliinyk Volodymyr
National University of Civil Protection of Ukraine
http://orcid.org/0000-0002-5193-1775
Bondarenko Serhiy
National University of Civil Protection of Ukraine
https://orcid.org/0000-0002-4687-1763
Antoshkin Oleksiy
National University of Civil Protection of Ukraine
https://orcid.org/0000-0003-2481-2030
Yakukhin Serhiy
National University of Civil Protection of Ukraine
https://orcid.org/0009-0001-0224-0513
Derevyanko Oleksandr
National University of Civil Protection of Ukraine
https://orcid.org/0000-0002-3602-2055
DOI: https://doi.org/10.52363/2524-0226-2026-43-10
Keywords: detector, sensitive element, mathematical model, ferrite, time constant, operating parameters, inertia
Аnnotation
A mathematical model of a fire detector based on the principle of magnetic induction depend-ence on temperature is presented. The dynamics equations of the detector are given, taking into ac-count the magnetic properties of the ferrite contacts of the sensitive element, the conditions of heat exchange with the environment, the parameters of magnetization, magnetic induction, the type and structure of the material of the contacts that affect the operation of the detector. A characteristic fea-ture of the mathematical model of the detector is the comprehensive consideration of the influence of the magnetic properties and characteristics of the ferrite material of the contacts on the detector oper-ation parameters. The dynamics equations obtained from the mathematical model of the detector de-scribe its operation in transient modes and represent first-order inertial links written in relative varia-bles with constant coefficients. Magnetic induction and magnetization of contacts are represented by relative variables, inertia and gain are taken into account by constant values. Dynamics equations al-low for a convenient study of the operation of a fire detector and to perform parametric calculations of its triggering parameters, taking into account the dependence of the magnetic properties of the contacts of the sensitive element on the temperature and structure of the ferrite material of the con-tacts. The obtained results of calculations of the detector triggering parameters confirm the correct-ness of the adopted hypothesis. The difference in the temperature and triggering time obtained in the calculations does not exceed 5 % of the experimental data. As a limitation of the use of the presented model, the use in calculations of the specified parameters of the magnetic field of a permanent mag-net, the characteristics of the substance of ferrite contacts, the determined dependences of the mag-netic induction of contacts on temperature and conditions of convective heat exchange of the detec-tor with the surrounding environment is used. As constructive ways to improve the detector’s operat-ing parameters, recommendations are given on the structure of the sensitive element, namely, in-creasing the total area of thermal contact to improve the conditions of convection heat transfer, re-ducing the mass of the sensitive element contacts to reduce the inertia, time and temperature of de-tector operation.
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Received by the editorial board: 10.03.2026
Accepted for publication: 13.04.2026
Date of publication (release): 31.05.2026
Risk management during the detection and disposal of explosive ordnance
Hubenko Andrii
National University of Civil Protection of Ukraine
https://orcid.org/0009-0007-3647-3909
Zolochevskyi Denus
National University of Civil Protection of Ukraine
https://orcid.org/0009-0000-3076-5272
Diadchenko Arsenii
Military Institute of Armored Forces of
National Technical University “Kharkiv Polytechnic Institute”
https://orcid.org/0009-0007-0518-3562
Korniienko Ruslan
National University of Civil Protection of Ukraine
https://orcid.org/0000-0003-4854-283X
DOI: https://doi.org/10.52363/2524-0226-2026-43-11
Keywords: risk management, detection, identification of explosive objects, explosive objects, disposal
Аnnotation
Substantiates a scientific and applied approach to risk management in the course of explosive ordnance detection and destruction (disposal) operations within Mine Action. It is shown that the safety of such operations is determined not only by compliance with established procedures, but also by the quality of explosive ordnance identification, the completeness of baseline information, the complexity of the operational environment, the technical reliability of detection and destruction (dis-posal) equipment, environmental conditions, the human factor, and the level of managerial coordina-tion. An integrated risk assessment model is proposed, based on weighting the key influencing fac-tors, normalizing their values, and introducing a scenario coefficient that takes into account the spe-cific characteristics of the task location. A scale for interpreting risk levels, a calculation example, and the results of the model sensitivity analysis are presented. It is established that the greatest influence on the final risk level is exerted by the probability of a hazardous event, the severity of possible con-sequences, the complexity of the operational environment, technical reliability, and the human fac-tor. It is demonstrated that the application of a formalized risk management model makes it possible to improve the validity of managerial decisions, enhance work planning, reduce the likelihood of per-sonnel errors, and strengthen task execution safety. The practical significance of the obtained results lies in the possibility of using the proposed approach in the training of mine action specialists, the organization of operations, and the development of departmental risk assessment procedures. The proposed approach may be adapted to various operational scenarios, including open terrain, built-up areas, locations near critical infrastructure facilities, and conditions of restricted access, which ensures its versatility for SES of Ukraine EOD units. This expands the possibilities for its application in both training and operational activities.
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Received by the editorial board: 10.03.2026
Accepted for publication: 13.04.2026
Date of publication (release): 31.05.2026
Features of ensuring safe operation of robots for fire extinguishing
Tsymbal Bohdan
National University of Civil Protection of Ukraine
https://orcid.org/0000-0002-2317-3428
Rybka Evgeniy
National University of Civil Protection of Ukraine
https://orcid.org/0000-0002-5396-5151
Holoborodko Evgeniy
National University of Civil Protection of Ukraine
https://orcid.org/0009-0005-7915-8058
Pohrebniak Volodymyr
National University of Civil Protection of Ukraine
https://orcid.org/0000-0002-7735-3408
Petryshchev Artem
National University «Zaporizhzhya Polytechnic»
https://orcid.org/0000-0003-2631-1723
DOI: https://doi.org/10.52363/2524-0226-2026-43-9
Keywords: safe operation, occupational risks, emergency and rescue operations, equipment failures
Аnnotation
The theoretical and applied aspects of ensuring the safe operation of robotic systems for fire extinguishing in complex, dynamic, and hazardous environments are studied. The relevance of implementing robotic technologies in fire response practice is substantiated, taking into account the need to reduce occupational risks and improve the efficiency of emergency and rescue operations. A generalized analysis of the current state of development of robotic fire extinguishing systems is carried out, which made it possible to determine their main functional capabilities, technical characteristics, and advantages compared to traditional means. It is established that, despite significant technological potential, the use of such systems is accompanied by a number of limitations, including insufficient adaptability to high temperatures and smoke conditions, limited autonomy, instability of communication channels, and difficulties in integration into existing organizational response structures. The study identifies the main hazardous factors and risks associated with the operation of robotic systems, including equipment failures, software malfunctions, sensor inaccuracies, the impact of aggressive environments, as well as the human factor, in particular operator errors under conditions of limited time and increased psycho-emotional stress. A methodology for assessing occupational risks is proposed, based on a systematic approach and involving sequential hazard identification, analysis of conditions of occurrence, determination of the probability of realization and severity of consequences, followed by risk ranking according to the level of criticality. The expediency of applying an integrated approach to ensuring the safe operation of robotic systems is substantiated, combining technical, organizational, and legal measures. It is established that the implementation of the proposed approaches contributes to increasing the efficiency of functioning of robotic systems.
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Received by the editorial board: 10.03.2026
Accepted for publication: 13.04.2026
Date of publication (release): 31.05.2026
Сторінка 2 із 26








