The RET 543 Transformer Terminal is designed for the protection, control, measurement and supervision of two-winding power transformers and power generator-transformer blocks in distribution networks.
The terminals are loaded with functionality to suit your application. Besides the three-phase stabilized current differential function featuring 2nd and 5th harmonic restraint, the Basic version terminals incorporate three-phase overcurrent, non-directional earth-fault, restricted earth-fault, transformer thermal overload and phase unbalance protection.
The Multi version terminals further include overvoltage and undervoltage supervision, directional earth-fault, residual voltage and overexcitation protection, overfrequency and underfrequency protection, and underimpedance protection. Enhanced with an optional automatic voltage regulator function the terminal forms an integrated transformer management unit.
A special Control version terminal with just voltage regulator and control functions is also available.