Description
Beside the pure RMS value measurement of the line voltage the IRU_PRO evaluates the symmetrical components (U1, U2 & U0 sequence system). By evaluating these components relay IRU_PRO can detect the phase sequence, voltage unbalance and earth-faults, Neutral displacement for capacitor protection purpose.
KEY FEATURES
- Numeric DSP technology based relay..
- Two Groups of configuration parameter.
- 2 Stage Under & Over voltage Protection.
- Inverse as well as Definite Trip timing curve selection for under/over voltage.
- Separate tripping elements for over- and under voltage and positive sequence system.
- Display of measuring values of the line voltages and system voltages U0, U1 and U2 as RMS values.
- Suitable for Star /Delta connection.
- VT Ratio 1- 1000 for Primary Voltage display configuration.
- Block on under voltage in case of Power failure ( Mains Fail Detection – user selectable).
- Last 10 faults with date & time stamp.
- 100 Events with date & time stamp.
- Suitable for 50Hz/ 60Hz.
- Single Phase/ Three Phase selection.
- USB front end interface for PC/Laptop interface.
- Off line Trip Test mode.
