TEBIT for FOX515/512
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Utility Communications TEBIT for FOX515/512 Teleprotection and binary interface Teleprotection is a key application demanded by any utility communications system. Distance protection relays need to exchange information in order to operate correctly and provide fast reaction times in case of any fault on the power line. Reaction times within milliseconds are essential to prevent damage to industrial assets worth millions of investment. The relays exchange trip signals between each other which allows the relays to localize a fault faster and more selectively. Such critical applications ask for very fast signal transmission on one hand and for very high dependability (probability to miss a command) and security (probability of a false, unwanted command) on the other. The communications service needs to be guaranteed at any time, so accordingly highest availability of the teleprotection interfaces and communications channel needs to be ensured. The TEBIT Teleprotection interface module provides four command inputs and outputs for distance protection applications and guaranties highest reliability and dependability of the communications channel. Continuous supervision of the availability of the data channel, fastest switchover from main to protecting channel (< 5 ms) and automatic loop test for delay measurement make the TEBIT interface the ideal solution for distance protection signal transmission. Accordingly the FOX515 can be directly interconnected with the protection relay and be used for teleprotection signal transmission via WAN network. FOX515 can be used as a combined communication/teleprotection equipment and thus provides a unique solution optimised for power utilities. The FOX515/TEBIT solution helps to save costs by providing several benefits such as less space requirements, fully integrated solution with one configuration tool and management system for all services.

TEBIT – outstanding features for ABB's demanding customers Specially designed for utilities The TEBIT interface has been specifically designed for distance protection applications. Therefore it provides exactly the features required by power utilities. Having a fibre optic multiplexer integrated solution allows to provide optimized end to end solutions for your mission critical application. Besides, TEBIT also saves space and ensures full supervision by the network management system (FOXMAN). An 8 bit command addressing scheme ensures correct cross connection and the very fast 1+1...

TEBIT – optimised teleprotection solution It is possible to protect more than one power line using one TEBIT module (e.g. if only two commands are used per power line). Station C of the picture below shows such a configuration. Station A, B and C are connected in a Tee-line configu- ration. Trip signals (Trip signal 1 and 2) are broadcast to the two opposite stations. Trip-signal 3 and 4 are configured in a point-to-point connection. A GPS receiver provides an accurate time reference for the event recorder. Power Line Trip 1 Trip 2 Trip 3 Trip 4 Powerline Trip 1 Trip 2 Trip 3 Trip 4 TEBIT...

Teleprotection inputs / outputs Command inputs 4 Nominal input voltage 24 VDC up to 250 VDC configurable with UCST Threshold 60% of nominal input voltage Command outputs 4 (PowerMosFET normally open) Tripping command 250 VDC, < 2 A, Ton/Toff < 1/3; Aux. outputs 2 relays, NO/NC contacts Propagation delay time Typical 3.5 ms (optimized for speed 24 ... 125 VDC) Standard compliance IEC 60834-1 Binary signal inputs / outputs Binary inputs 8 (Opto coupler) Nominal input voltage 24, 48, 60 VDC; low -72 ... +9 VDC; high +18 ... +72 VDC Input current low < 1.5...