ABB 1MRK504053-BEN RET670 Transformer protection IED Features

Features

• A protection, control, and monitoring IED with extensive functional library and configuration

possibilities and expandable hardware design to meet specific user requirements

• For power transformers, autotransformers, shunt reactors, T-protection, generator transformer

blocks, phase shifting transformers and small busbar systems

• For two- and three-winding transformers with up to six stabilized inputs

• For multi- or single-breaker arrangements

• Transformer differential protection with:

- Percentage bias restraint for through faults

- Waveform and Second harmonic restraint for transformer inrush

- Fifth harmonic restraint for overexcitation

- High sensitivity for interturn faults

• Restricted earth fault protection for all direct or low impedance earthed windings

- Extremely fast operation

- High sensitivity

- High and low impedance based

• Full scheme phase-to-phase and phase-to-earth distance protection with up to five zones:

- Load encroachment feature

• Instantaneous high speed short circuit function with low transient overreach

• Directional overcurrent protection with four steps for each winding

- Each step can be inverse or definite time delayed

- Each step can be directional or non-directional

• Instantaneous high speed earth fault function with low transient overreach

• Directional earth fault protection with four stages for each winding

- Each step can be inverse or definite time delayed

- Each step can be directional or non-directional

- Each step can be blocked on second harmonic component

• Synchrocheck function for single- or multi-breaker arrangements:

- Selectable energizing direction

- Two functions with built-in voltage selection

• Selectable additional software functions such as

breaker failure protection for each breaker, voltage protection, overexcitation protection, control and monitoring

• Tripping from Buchholtz, temperature devices etc. through binary inputs stabilized against capacitive discharges

• Built-in data communication modules for station bus IEC 61850-8-1

• Data communication modules for station bus IEC 60870-5-103. LON and SPA

• Integrated disturbance and event recorder for up to 40 analog and 96 binary signals

• Time synchronization over IEC 61850-8-1. LON, SPA, binary input or with optional GPS module

• Analog measurements accuracy up to below 0.5% for power and 0.25% for current and voltage and with site calibration to optimize total accuracy

• Versatile local human-machine interface

• Extensive self-supervision with internal event recorder

• Six independent groups of complete setting parameters with password protection

• Powerful software PC tool for setting, disturbance evaluation and configuration

• Remote end data communication modules for C37.94 and G.703