In spite of the growing use of digital communication systems - especially those employing optical fibre links for which ABB produces a comprehensive line of equipment - PLC is still often the most cost effective, and reliable, solution to cover the operational needs of a power system. This applies particularly when only low volumes of data have to be transmitted over long distances. An existing PLC network represents a considerable investment made over many years, and for reasons of cost and system operation it is seldom possible, or necessary, to replace it with a digital system in a short space of time. An existing PLC network can often be usefully expanded rather than replaced, and in such cases frequency allocation must be carefully planned to mitigate any channel shortage.

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In other instances a PLC channel is used as a back-up to fiber-based digital channels, providing a dependable communication link in the most demanding of circumstances. With decades of successful involvement in the PLC and transfer tripping field, ABB continues to prove its high technical standards and competence by remaining at the forefront of PLC development.

ABB provides the latest technologies to PLC systems, with five-step variable bandwidth and flexible partitioning of digital and analog data, backed with a formidable capability in systems and applications engineering. Lg Optimus L3 E400 Cm9 Download on this page.

Product Description 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. Power Supplies • Choice of 48V/125Vdc or 250 Vdc Power Supplies. The Succession Wars Board Game Download Free.