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An efficient communication interface and protocol for motor protection relays

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dc.contributor.author Mouton, A.J.J.
dc.contributor.author Smith, C.J.
dc.contributor.author Smith, G.E.;
dc.contributor.other Central University of Technology, Free State, Bloemfontein
dc.date.accessioned 2015-09-23T12:20:21Z
dc.date.available 2015-09-23T12:20:21Z
dc.date.issued 2009
dc.date.issued 2009
dc.identifier.issn 16844998
dc.identifier.uri http://hdl.handle.net/11462/524
dc.description Published Article en_US
dc.description.abstract A company in South Africa is a three-phase induction motor protection relay manufacturer. The function of the protection relay is to capture running data, to provide protection against possible damage, to control an electric motor and to communicate this data to the System Control and Data Acquisition (SCADA) system in a control room. In the case of remote sites e.g. a pump station, the protection relays are used as standalone units. The protection relays are equipped with communication facilities to be used in an instrumentation environment. If a trip occurs or settings need to be changed a technician has to visit the remote site and address the problem. The ideal cost and time effective solution is to perform these tasks remotely via a reliable wireless network. A study was conducted to ascertain the viability of using the standard GSM cellular networks in South Africa to effectively control electric motors and to communicate with the Motor Protection Relays (MPRs) controlling the electric motors in order to determine the status of a motor, settings of the motor, trips that occurred and time of occurrence. It was shown that a node controller could be used to store all the data from various electric motors at a single location. It was also shown that the data from the different electric motors could be analysed at the node controller and that communication can then be initiated from the controller to a responsible person via the GSM network. It was further illustrated that, by making use of the GSM networks in South Africa together with the short message service (SMS), communication and control can be effectively established. SMSs proved to be a reliable means of communication between cellular phones, an embedded network and MPRs. It was shown that software protocols, although slower in communication speed, proved to be reliable and effective for the purpose of transferring information between the node controller and the motor protection relays connected to the electric motors. en_US
dc.format.extent 1 382 039 bytes, 1 file
dc.format.mimetype Application/PDF
dc.language.iso en_US en_US
dc.publisher Journal for New Generation Sciences, Vol 7, Issue 1: Central University of Technology, Free State, Bloemfontein
dc.relation.ispartofseries Journal for New Generation Sciences;Vol 7, Issue 1
dc.subject Motor protection relays en_US
dc.subject Remote GSM node controller en_US
dc.subject GSM modem en_US
dc.subject Short message service (SMS) en_US
dc.subject Modbus protocol application en_US
dc.title An efficient communication interface and protocol for motor protection relays en_US
dc.type Article en_US
dc.rights.holder Central University of Technology, Free State, Bloemfontein

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