KONpro - Model RFX -Numerical Protection Relay

Thanks to our rich experience in development and application of protection relays, the research and development team of the company KONCAR – Electronics and informatics, Inc., has developed a series of devices, which answer all requests set for this sort of equipment. The protection relay type RFX is a sequel of KONPRO generation of protection relays, built for protection of distribution and industrial medium voltage electrical power installations. RFX offers the complete range of protection functions necessary for reliable protection of medium voltage busbar feeders and ability of oversight and control of complete switchgear. Thanks to its circuit architecture and modular software support, it is suitable for protection of power grids with all types of grounding. Integrated directional protection with energy flow supervision allows swift protection of radial and looped grids. Aside from its primary protective role, RFX enables several other options required from present-day protection relays, allowing reduction of devices needed in the field, which in turn reduces equipment maintenance costs. Key options include local and remote display of all current measured values, supervision of devices connected in the field, switchgear management, and fault record of electric values during the time of failure, energy measurement, THD measurement, circuit breaker wear monitoring, fault location and transfer of data to the SCADA system. Delayed operation time characteristics in accordance with IEC and IEEE standards allow simple integration of the relay into existing protection systems, while retaining time selectivity applied in the system. Three levels of protective functions parameters allow quick protection adaptation to changes in the system. High level of programmability using the integrated program matrix allows simple signal interconnection to binary inputs and relay outputs of the device.

Predefined switchgear schemes add to the simplicity of relay configuration with the possibility of adding new schemes if current ones do not comply with buyers’ demands. Modular design of the circuits and software architecture of the relay allow implementation of additional protection functions along with implementation of basic protection functions, which are part of the common programming package of the device, in accordance with customer needs. Integrated software support allows change of most parameters of protection functions using the control panel. Complete parameterization and parameter read-out is achieved using a computer.