MiCOM P921/P922/P923 - Schneider - error

IntroductionP92x/EN IT/H42MiCOM P921/P922/P923 Page 5/63. INTRODUCTION TO THE MiCOM P921, P922 & P923 RELAYSThe range of MiCOM protection relays is built on the success of the MIDOS, K and MODNranges by incorporating the last changes in numerical technology. Relays from the MiCOMP92x range are fully compatible and use the same modular box concept.MiCOM P921, P922 and P923 relays provide comprehensive voltage and frequencyprotection.In addition to its protective functions, each relay offers control and recording features. Theycan be fully integrated to a control system so protection, control, data acquisition andrecording of faults, events and disturbances can be made available.The relays are equipped on the front panel with a liquid crystal display (LCD) with 2 x 16back-lit alphanumerical characters, a tactile 7 button keypad (to access all settings, clearalarms and read measurements) and 8 LEDs that indicate the status of MiCOM P921, P922and P923 relays.In addition, the use of the RS485 communication port makes it possible to read, reinitialiseand change the settings of the relays, if required, from a local or remote PC computer loadedwith MiCOM S1 software.Its flexibility of use, reduced maintenance requirements and ease of integration allow theMiCOM P92x range to provide an adaptable solution for the problems of the protection ofelectric networks.