Description

ABB RET 545 Transformer terminal Numerical Relay

ABB TRANSFORMER TERMINAL RET 545 NUMERICAL RELAY THE RET 545 TRANSFORMER TERMINAL IS USED FOR THE PROTECTION, CONTROL, MEASUREMENT AND SUPERVISION OF TWO-WINDING POWER TRANSFORMERS AND POWER GENERATOR-TRANSFORMER BLOCKS IN DISTRIBUTION NETWORKS.

ABB RET 545 Relay 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 over-current, non-directional earth-fault, restricted earth-fault, transformer thermal overload and phase unbalance protection.

These multi-version terminals further include over-voltage and under-voltage supervision, directional earth-fault, residual voltage and over-excitation protection, over-frequency and under-frequency protection, and under-impedance protection. Enhanced with an optional automatic voltage regulator function the RET 545 terminal forms an integrated transformer management unit.

A special control version terminal with just voltage regulator and control functions is also available.

Scope

Transformer protection relay

Product benefits

• Withstands harsh environments e.g. in heavy industry, marine and offshore applications
• Programmable logic functions (PLC)
• Wide support for different communication protocols
• Optical communication for fast disturbance-free communication

ABB RET 545 Relay features

• Three-phase current differential protection with stabilized and instantaneous stages for fast and selective winding short-circuit and interturn fault protection
• Optional automatic on-load tap-changer control function for single or parallel transformers
• Support for IEC 61850 and Profibus DP protocols through adapters
• 34 binary inputs and 26 output relays

ABB delivers a full range of genuine IEC 61850 protection and control products also including network automation. ABB’s IEC 61850 compliant solutions offer a unified user experience for operating power distribution systems from the secondary substation level up to the network control center level. ABB distribution automation products are built to withstand the rigors of the most demanding environments including marine and offshore, industrial facilities such as mines and paper and petrochemical plants, as well as utilities in urban and rural locations.

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