RFL 9780 FSK Powerline Carrier
The RFL 9780 is a Programmable Frequency-Shift Keyed (FSK) power line carrier system, which can be supplied as a transceiver (Tx/Rx), transmit-only (Tx), receive-only (Rx), dual transmitter (Tx/Tx), or dual receiver (Rx/Rx). All versions are available with redundant power supplies. These features include improved RFI and Surge Withstand Capabilities (meeting the requirements of ANSI/IEEE C93.5), ESD protection (per IEEE PC 37.90.3, draft A, 1/8/99) and increased flexibility through field-programmable frequencies and logic, reflected power measurement option, and no cost WindowsTM web based user interface.
Typical applications for the 9780 include Direct Transfer Trip (DTT-single or dual channel), Permissive Transfer Trip (PTT), Directional Comparison Unblocking (DCU), and dual phase comparison. For protective relaying applications, the universal I/O capabilities of the RFL 9780 allow its use with all protective relay designs currently in use, as well as many vintage relays. Often a 9780 can be configured as a direct drop-in replacement for an older PLC set.