ADR233A – Communicable 3 Pole Differential


General Description

ADR233A is a numerical differential transformer protection relay with dual bias characteristic for two winding transformer.

ANSI IEC Protection Functions
50 - Dual Bias Differential Protection.

Model Functional Details Cabinet Style
ADR233A Communicable Numerical Differential transformer protection relay for two winding transformer. CSD-V-120

Numerical 3 Pole Differential Transformer Protection ADR233A Relay


  • Online display of Phase Current / Differential Current.
  • Latching of fault current value
  • High Speed operation.
  • Operation is based on fundamental frequency value.
  • Harmonics restrain for Transformer charging and CT saturation condition.
  • Programmable Internal ICT (Interposing CT) ratio to match different transformers having different vector groups.
  • Programmable dual bias setting.
  • SCADA compatibility. IEC60870-5-103 protocol.
  • Latching of Last 5 fault along with date and time stamp.
  • 25 Cycle of disturbance record and 100 Event memory.