Main functions Protection PE80315 b Overcurrent and earth fault protection with adjustable time reset and with switching from on setting group to the other controlled by a logic order b Earth fault protection insensitivity to transformer switching b Detection of phase unbalance b RMS thermal protection which takes into account external operating temperature and ventilation operating rates b Rate of change of frequency protection (ROCOF), for a fast and reliable disconnection. Communication Sepam can be connected to a supervision communication network (S-LAN) based on the following communication protocols: b Modbus RTU b DNP3 b IEC 60870-5-103 b IEC 61850 All the data needed for centralized equipment management from a remote monitoring and control system are available via the communication port: b reading: all measurements, alarms, protection settings,... b writing: breaking device remote control orders,... Diagnosis 3 types of diagnosis data for improved operation: b network and machine diagnosis: tripping current, unbalance ratio, disturbance recording b switchgear diagnosis: cumulative breaking current, operating time b diagnosis of the protection unit and additional modules: continuous self-testing, watchdog. Control and monitoring Circuit breaker program logic ready to use, requiring no auxiliary relays or additional wiring. Sepam with basic UMI and with fixed advanced UMI. User Machine Interface 2 levels of User Machine Interface (UMI) are available according to the user’s needs: b basic UMI: an economical solution for installations that do not require local operation (run via a remote monitoring and control system) b fixed or remote advanced UMI: a graphic LCD display and 9-key keypad are used to display the measurement and diagnosis values, alarm and operating messages and provide access to protection and parameter setting values, for installations that are operated locally.