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Hi, I am Businessman I found this sample from https://www.indotrade.co and think it might be useful to you. ------------------------------------------------------- earth fault relay ABB SPAS 120C 3 Directional Earth-fault Relay Product Guide SPAS 120 C Features • Two-stage directional earth-fault relay for distribution networks • Directional low-set earth-fault stage with definite time characteristic • Directional high-set earth-fault stage with instantaneous operation or definite time characteristic • Operation direction of the high-set earth- fault stage either the same as that of the low-set stage, or the opposite • Output relay functions to be freely config- ured by the user • Flexible adaptation of the relay to different applications • Manual selection or remote control of the operation characteristic I0sinÕ or I0cosÕ • Digital display of settings, measured quan- tities, recorded fault values, etc. • Extensive two-way data communication via fibre-optic serial bus • Continuous self-supervision of hardware and software including auto-diagnosis • Powerful software support for parameter- ization and supervision of the relay Application The directional earth-fault relay SPAS 120 C is designed to be used for selective feeder earth-fault protection in isolated neutral and impedance earthed networks. The relay is especially useful in networks, where the oper- ation characteristic of the earth-fault relay must be remotely controllable. The directional earth-fault relay can also be used for the earth-fault protection of power generators and large motors. For detailed information, please go to http://www.indotrade.co/pteanco/2978345
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