Numerical Voltage Protection Relay (Non-Draw out) : IRU PRO-UOR

Range

• Design :Weight approx 1Kg
• Mounting :Rack or flush mounting.
• Front Panel: IP 54
• PC Interface:USB type B connector

Features

• Numeric DSP technology based relay
• Digital tiltering of the measured values by using discrete Fourier analysis to suppress higher harmonics and D.C. components induced by faults or system operations
• Two Groups of configuration parameter
• Protection ANSI: 27, 59, 59N, 47, 59D

Presentation

PRO range of relays provide reliable and high performance protection. The |RU_PRO is a relay tor AC voltage supervision with universal application; it protects the three-phase network against over-, under- voltage, unbalance or earth faults in isolated networks. Beside the pure RMS value measurement of the line voltage the lRU_PRO evaluates the symmetrical components (Ul , U2 & UO sequence system). By evaluating these components relay |RU_PRO can detect the phase sequence, voltage unbalance and earth faults.The relay is equipped with an independent, 2-step over- (U>, U>>) and under voltage supervision simultaneously with separately adiustable tripping values and delay times. Voltage measuring is 3-phase. In this process there is a continuous comparison of the line conductor voltages in case of a delta connection and of the phase voltages in case of a star connection with the preset limit values. The highest voltage is always evaluated for over voltage supervision and the lowest voltage for under voltage supervision.

Benefits

• Voltage supervision each with two step under-/ and over voltage detection
• Inverse as well as Detinite Trip timing curve selection tor under/over voltage
• Separate tripping elements tor over- and under-voltage and positive sequence system
• Over voltage detection in positive, negative- and zero sequence system
• Display of measuring values of the line voltages and system voltages U0, Ul and U2 as RMS values
• Suitable tor Star /Delta connection
• VT Ratio tor Primary Voltage display configuration
• Block on under voltage in case of Power failure (user selectable)
• Last TO faults saving in memory tor all line voltages and the voltages of the symmetrical components, with time stamp.
• Recording of up to last 100 Events with time stamp.
• Assignment matrix tor output relays tor all protections
• Suitable for 5OHZ/ 6OHz.
• Single Phase/ Three Phase selection
• USB tront end intertace tor PC/Laptop interlace
• Front~end Live Link simulation support tor testing of relay even without three phase injection voltage source
• Off line Trip Test mode
• Wide range SMPS based Auxiliary Supply (24-2éOVAC/24-36O\/DC)
• Front IP54 transparent dust cover.