F-Type Residual Current Relays
To prevent undesirable consequences caused by fluctuations in grid voltage and to ensure reliable protection, F-Type Residual Current Relays stand out, particularly with their high immunity levels. Frequency changes occurring during grid voltage fluctuations can cause unwanted tripping in many relay types. However, the operating frequency of F-type relays spans a wide range, from 10 Hz to 1000 Hz. This feature means the relay has the ability to detect changes in voltage and provide immunity to complex frequencies. Thanks to this characteristic, F-type relays are unaffected by fluctuations in grid frequency and prevent unnecessary tripping.
F-type relays can be used effectively, especially in non-harmonic conditions. These relays do not contain harmonic filters, and their operating principle is based on their immunity to voltage fluctuations. It is not possible to find the term 'harmonic filter' in the catalogs of major international brands for F-type relays.
No special laboratory is needed to test product performance. A simple test with a machine equipped with a drive is sufficient to demonstrate the reliability of F-type relays. The video below shows a test conducted on a machine with 7 drives, featuring an ISKRA A-type (K) harmonic filtered relay, a B-Type Relay, an F-type relay, and an SI-type relay. This test, which demonstrates the inability of F and B-type relays to operate reliably in a 40 Amp machine when they do not contain harmonic filters, allows users to perform similar tests on their own machines.
Applications of F-Type Relays:
- UPS output sockets
- Residential buildings, apartments, villas
- Lighting systems
F-type relays can operate without the need for an auxiliary power supply and can be used effectively in systems that do not utilize a neutral conductor. F-Type Residual Current Relays, with their test and quality certificates obtained from Germany according to international standards, offer a reliable and effective solution.
- F-Type Residual Current Relays Download
