ABB 1MRK 505 137-BEN RED 670 Line differential protection IED

ABB 1MRK 505 137-BEN RED 670 Line differential protection IED

DESCRIPTION

The RED 670 IED is used for the protection, control and monitoring of overhead lines and cables in  all types of networks. The IED can be used up to  the highest voltage levels. It is suitable for the protection of heavily loaded lines and multi-terminal  lines where the requirement for tripping is one-,  two-, and/or three pole. The IED is also suitable  for protection of cable feeders to generator block  transformers.

The phase segregated current differential protection provides an excellent sensitivity for high  resistive faults and gives a secure phase selection.  The availability of six stabilized current inputs  allows use on multi-breaker arrangements in three  terminal applications or up to five terminal applications with single breaker arrangements. Remote  communication based on the IEEE C37.94 standard can be redundant when required for important  installations. Charging current compensation  allows high sensitivity also on long overhead lines  and cables. A full scheme distance protection is  included as independent protection or as back-up  at remote end communication failures. Eight channels for intertrip and binary signals are available in  the communication between the IEDs.

Features

• A protection, control, and monitoring IED with  extensive functional library and configuration  possibilities and expandable hardware design to  meet specific user requirements 

• For overhead lines and cables 

• For transformer feeders 

• For single and/or three phase tripping 

• High impedance differential protection for  tee-feeders 

• Phase-segregated line differential protection  with up to six stabilized inputs for up to five line  terminals with:

- Charging current compensation 

- Separate inputs for each CT in double  breaker, ring and one and a half breaker  installations for improved through fault stability 

- Suitable for multiplexed, route switched, as  well as dedicated fibre, communication networks using C37.94 protocol 

- Power transformers can be included in the  protected zone 

- Transfer of up to eight binary signals 

- Time synchronization with the echo-method  or built-in GPS

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

- All types of scheme communication 

- Load encroachment feature

• Synchrocheck and dead-line check function for  single- or multi-breaker arrangements: 

- Selectable energizing direction 

- Two functions with built-in voltage selection

• Auto-reclosing function for single- two-, and/or  three-phase reclosing: 

- Two functions with priority circuits for  multi-breaker arrangements 

- Co-operation with synchrocheck function 

- Can be switched On-Off from remote through  communication or with local switches through  binary inputs 

• Selectable additional software functions such as  distance protection, control and monitoring 

• 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

Functions

• Differential protection 

- High impedance differential protection  (PDIF, 87X) 

• Line differential protection 

- Line differential protection, 3 CT sets, 2-3 line  ends (PDIF, 87L) 

- Line differential protection, 6 CT sets, 3-5 line  ends (PDIF, 87L) 

- Line differential protection 3 CT sets, with  in-zone transformers, 2-3 line ends  (PDIF, 87LT) 

- Line differential protection 6 CT sets, with  in-zone transformers, 3-5 line ends  (PDIF, 87LT) 

• Distance protection - Distance protection zones (PDIS, 21) 

- Phase selection with load encroachment  (PDIS, 21) 

- Power swing detection (RPSB, 78) 

- Automatic switch onto fault logic (PSOF)