Numerical Inverse Time Over Voltage Relay : ADR112ASpecifications1 Phase inverse time over voltage Relay or under voltage protection. Programmable (Non- Volatile) Setting By local keys Back - lit LCD display for settings. Display of fault voltage / Load voltage. IDMT Curve. Equivalent VDG11 and VDG13 of EE make relay. Design using DSP technology. Latching of fault value. Pass-word protection for setting.The ADR112A is a single element inverse time under or over voltage relay with timer suitable for capacitor bank protection, VT supervision etc.