Electrodynamic Contact Bounce Induced by Fault Current in Low-Voltage Relays
Due to fault currents occurring in electrical installations, high electromagnetic force values may be induced in current paths of low-voltage electromagnetic relays. This force may lead to an electromagnetic bounce that will further result in an electric arc ignition between contacts, and under some...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-10-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/12/20/3926 |
| _version_ | 1811304415164891136 |
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| author | Andrzej Ksiazkiewicz Grzegorz Dombek Karol Nowak Jerzy Janiszewski |
| author_facet | Andrzej Ksiazkiewicz Grzegorz Dombek Karol Nowak Jerzy Janiszewski |
| author_sort | Andrzej Ksiazkiewicz |
| collection | DOAJ |
| description | Due to fault currents occurring in electrical installations, high electromagnetic force values may be induced in current paths of low-voltage electromagnetic relays. This force may lead to an electromagnetic bounce that will further result in an electric arc ignition between contacts, and under some circumstances, it will result in contact welding. For the proper exploitation of relays, the threshold value of the maximum current, and thus the electrodynamic force, should be known. This force depends on several factors, including: contact materials, dimensions of relay current paths, relay electromagnetic coil, etc. This paper presents the results of calculations and an experiment on electromagnetic forces, which cover these factors. A static closing force, acting on the contacts, and the fault current were measured. As a result, values of the force and current threshold were obtained, which inform when an electrodynamic bounce may occur. The obtained result may be used in designing contact rivets and relay current paths together with the selection of adequate fault protection devices. |
| first_indexed | 2024-04-13T08:05:34Z |
| format | Article |
| id | doaj.art-454958cf20fc438faa76fd6db40dec63 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-13T08:05:34Z |
| publishDate | 2019-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-454958cf20fc438faa76fd6db40dec632022-12-22T02:55:09ZengMDPI AGEnergies1996-10732019-10-011220392610.3390/en12203926en12203926Electrodynamic Contact Bounce Induced by Fault Current in Low-Voltage RelaysAndrzej Ksiazkiewicz0Grzegorz Dombek1Karol Nowak2Jerzy Janiszewski3Institute of Electric Power Engineering, Poznan University of Technology, Piotrowo 3A, 60-965 Poznan, PolandInstitute of Electric Power Engineering, Poznan University of Technology, Piotrowo 3A, 60-965 Poznan, PolandInstitute of Electric Power Engineering, Poznan University of Technology, Piotrowo 3A, 60-965 Poznan, PolandInstitute of Electric Power Engineering, Poznan University of Technology, Piotrowo 3A, 60-965 Poznan, PolandDue to fault currents occurring in electrical installations, high electromagnetic force values may be induced in current paths of low-voltage electromagnetic relays. This force may lead to an electromagnetic bounce that will further result in an electric arc ignition between contacts, and under some circumstances, it will result in contact welding. For the proper exploitation of relays, the threshold value of the maximum current, and thus the electrodynamic force, should be known. This force depends on several factors, including: contact materials, dimensions of relay current paths, relay electromagnetic coil, etc. This paper presents the results of calculations and an experiment on electromagnetic forces, which cover these factors. A static closing force, acting on the contacts, and the fault current were measured. As a result, values of the force and current threshold were obtained, which inform when an electrodynamic bounce may occur. The obtained result may be used in designing contact rivets and relay current paths together with the selection of adequate fault protection devices.https://www.mdpi.com/1996-1073/12/20/3926relayscontact materialscontact bounceelectric arccontact welding |
| spellingShingle | Andrzej Ksiazkiewicz Grzegorz Dombek Karol Nowak Jerzy Janiszewski Electrodynamic Contact Bounce Induced by Fault Current in Low-Voltage Relays Energies relays contact materials contact bounce electric arc contact welding |
| title | Electrodynamic Contact Bounce Induced by Fault Current in Low-Voltage Relays |
| title_full | Electrodynamic Contact Bounce Induced by Fault Current in Low-Voltage Relays |
| title_fullStr | Electrodynamic Contact Bounce Induced by Fault Current in Low-Voltage Relays |
| title_full_unstemmed | Electrodynamic Contact Bounce Induced by Fault Current in Low-Voltage Relays |
| title_short | Electrodynamic Contact Bounce Induced by Fault Current in Low-Voltage Relays |
| title_sort | electrodynamic contact bounce induced by fault current in low voltage relays |
| topic | relays contact materials contact bounce electric arc contact welding |
| url | https://www.mdpi.com/1996-1073/12/20/3926 |
| work_keys_str_mv | AT andrzejksiazkiewicz electrodynamiccontactbounceinducedbyfaultcurrentinlowvoltagerelays AT grzegorzdombek electrodynamiccontactbounceinducedbyfaultcurrentinlowvoltagerelays AT karolnowak electrodynamiccontactbounceinducedbyfaultcurrentinlowvoltagerelays AT jerzyjaniszewski electrodynamiccontactbounceinducedbyfaultcurrentinlowvoltagerelays |