Over-voltage protection relay SMPR-1
over-currentphase sequenceIEC

over-voltage protection relay
over-voltage protection relay
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Measured/monitored value
over-voltage, over-current, phase sequence
Other characteristics
IEC, programmable, digital, panel-mount


Current Voltage Power Feeder Protection Relay The SMPR has been designed to measure the line and the ground RMS currents and supply RMS voltages under normal conditions or under disturbances. This information is internally processed by the microprocessor, to take the protection actions defined by the user under ANSI, IAC or IEC standards. The operational conditions of the breaker or disconnector are also signaled. Applications Primary and backup protection for utility feeder, power plants and industrial distribution systems Protection of transformers, overhead lines, cables and generators Protection and Functionality (27) Undervoltage (32) Directional power (37) Undercurrent (46) Negative sequence current (47) Phase-sequence voltage (50) Instantaneous phase overcurrent (50N/50G) Instantaneous ground overcurrent Overload alarm pickup level (51) Inverse time phase overcurrent (51N/51G) Inverse time ground overcurrent ANSI, IAC or IEC/BS142 curves included: moderately inverse normal inverse very inverse extremely inverse definite time (55) Power factor (59) Overvoltage (68) Blocking output (81) Underfrequency and Overfrequency (86) Lockout Accumulated KA per phase on breaker interruption



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