The assessment of exploitation process of power for access control system

Wiśnios, M.; Paś, Jacek

doi:10.1051/e3sconf/20171901034

Cited by 4 publications

(2 citation statements)

References 20 publications

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“…The correct operation of all ESSs functioning in SCI areas and buildings depends on the power supply's reliability. This is an important issue, which is approached separately under ESS functional reliability [25][26][27].…”

Section: Application Of Integrated Fas With Varying Functional Struct...mentioning

confidence: 99%

The Dynamic Change in the Reliability Function Level in a Selected Fire Alarm System during a Fire

Paś,

Klimczak,

Rosiński

et al. 2024

Sensors

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This article discusses fundamental issues associated with the functional reliability of selected fire alarm systems (FASs) in operation during building fires. FASs operate under diverse external or internal natural environmental conditions, and the operational process of FAS should take into account the impacts of physical phenomena that occur during fires. Their operation is associated with the constant provision of reliability. FAS designers should also consider the system’s reliability when developing fire control matrices, tables, algorithms, or scenarios. All functions arising from an FAS control matrix should be implemented with a permissible reliability level, RDPN(t), prior to, as well as during, a fire. This should be assigned to the controls saved in the fire alarm control unit (FCP). This article presents the process by which high temperatures generated during a fire impact the reliability of FAS functioning. It was developed considering selected critical paths for a specific scenario and the control matrix for an FAS. Such assumptions make it possible to determine the impact of various temperatures generated during a fire on the reliability of an FAS. To this end, the authors reviewed that the waveform of the R(t) function changes for a given FAS over time, Δt, and then determined the fitness paths. The critical paths are located within the fire detection and suppression activation process, using FAS or fixed extinguishing devices (FEDs), and the paths were modeled with acceptable and unacceptable technical states. The last section of this article defines a model and graph for the operational process of a selected FAS, the analysis of which enables conclusions to be drawn that can be employed in the design and implementation stages.

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Section: Application Of Integrated Fas With Varying Functional Struct...mentioning

confidence: 99%

The Dynamic Change in the Reliability Function Level in a Selected Fire Alarm System during a Fire

Paś,

Klimczak,

Rosiński

et al. 2024

Sensors

Self Cite

View full text Add to dashboard Cite

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“…For the correct assessment of electrical parameters before and after compensation, an appropriate method of power measurement [56][57][58][59] should be adopted. When the analysis takes into account the nonlinearity of the load [29,[60][61][62], additional analytical problems will appear.…”

Section: Introductionmentioning

confidence: 99%

Decomposition of the Voltages in a Three-Phase Asymmetrical Circuit with a Non-Sinusoidal Voltage Source

Zajkowski,

Duer

2023

Energies

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This article presents the concept of a mathematical description of a three-phase, four-wire asymmetrical electric circuit in decomposition into Voltages’ Physical Components (VPC), associated with distinctive physical phenomena in the load. This is an alternative method of mathematical description to the Currents’ Physical Components (CPC) still being developed since the end of the last century. According to previous studies, the improvement of the power factor in three-phase systems is possible by observing several components. Compensation for the scattered power is possible only by using a reactive compensator connected in series with the load. Thanks to the presented analytical method, it is possible to design compensators connected in series with the load. The VPC power theory opens the possibility of improving the power factor in three-phase networks for loads with asymmetry between phases. Due to the unfavorable impact of high currents on the compensator branches, the method proposed in the article can improve the energy quality in local low-power grids. However, the possibility of its practical use in high-power industrial networks is questionable.

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The Impact of Temperature of the Tripping Thresholds of Intrusion Detection System Detection Circuits

2021

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This research paper discusses issues regarding the impact of temperature on the tripping thresholds of intrusion detection system detection circuits. The objective of conducted studies was the verification of a hypothesis assuming that the variability of an intrusion detection system’s (considered as a whole) operating environment temperature can impact the electrical parameters of its detection circuits significantly enough so that it enables a change in the interpretation of the state observed within a given circuit fragment from the state of “no circuit violation” to “circuit violation”. The research covered an intrusion detection system placed in a climatic chamber with adjusted temperature (−25.1 ÷ +60.0 [°C]). The analysis of the obtained results enabled determining the relationships that allow selecting detection circuit resistor values. It is important since it increases the safety level of protected facilities through proper resistor selection, thus, correct interpretation of a detection circuit state.

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The assessment of exploitation process of power for access control system

Cited by 4 publications

References 20 publications

The Dynamic Change in the Reliability Function Level in a Selected Fire Alarm System during a Fire

The Dynamic Change in the Reliability Function Level in a Selected Fire Alarm System during a Fire

Decomposition of the Voltages in a Three-Phase Asymmetrical Circuit with a Non-Sinusoidal Voltage Source

The Impact of Temperature of the Tripping Thresholds of Intrusion Detection System Detection Circuits

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