Measurement and protection relay0 pages

The SMPR-1 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 signalized

 Primary and backup protections for power plants, utility and industrial distribution systems.

Օ Protection of transformers, overhead lines, cables and generators.

 Allows the opening of the switch/disconnector within the limits of its capacity, leaving the circuit interruption to the back-up fuses in case of short circuit.

Օ (27) Undervoltage.

 (46) Negative sequence current [on request].

Օ (49) Thermal image [on request].

 (50) Instantaneous phase overcurrent.

Օ (50N/50G) Instantaneous ground overcurrent.

 Overload alarm pickup level.

Օ (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

Օ (55) Power factor.

 (59) Overvoltage.

Օ (59N) Homopolar voltage [on request].

 (67/67N) Directional phase/ground overcurrent [on request].

Օ (79) Automatic reclose [on request].

 (81) Underfrequency and Overfrequency.

Օ Accumulated KA per phase on breaker interruption.

 Remote communication using a PC or PLC by RS422 or RS485.

Օ Remote programming of the setpoints.

 Remote breaker opening or closing.

Օ CT primary ratio selectable in 5 A steps (10 to 5000 A).

 Touchpad programming.

Օ 1 trip relay and 1 alarm relay.

 1 breaker close relay.

Օ Power loss or internal fault control relay.

 4 digital inputs: breaker status, breaker earthed, external reset and input 1).

Օ Breaker operation failure alarm on trip command.

 LED and LCD display indication.

Օ Last trip cause and relative data.

 Indication and storage of fault condition and their values.

Օ Indication of the braker or disconnector status (open, close, earthed)

 RMS line and ground currents.

Օ Maximum instantaneous line and ground currents.

 RMS line or phase voltages.

Օ Active power (kW), reactive power (kvar) and apparent power (kVA).

 Active energy (MWh) and reactive energy (Mvarh).

Օ Power factor and system frequency.

 Positive and negative real power (kW) and reactive power (kvar).

Օ Running and maximum demand: current per phase (A), real power (kW), reactive power (kvar) and apparent power (kVA).

Systems: 3 and 4 wire three phase

systems

Frequency 50 and 60 Hz

Current: 5000 A maximum

Voltage: 69 kV maximum

Quality certified ISO 9001:2000 smpr-i_gbbr_o5osos