Month: July 2025

General

This manual

This manual contains application and functionality descriptions and

connection diagrams, input and output signals, setting parameters and

technical data. The manual can be used as a technical reference during

the engineering phase, installation and commissioning phase, and during

normal service. The manual can also be used when calculating settings.

Instructions on how to operate the IED during normal service once it has

been commissioned and it can be used to find out how to handle

disturbances or how to view calculated and measured network data in

order to determine the cause of a fault.

communication module (SLM)

The optical serial channel and LON channel module is used to connect an IED to the communication that use SPA,

 LON, or IEC60870–5–103. 

The module has two optical ports for plastic/plastic, plastic/glass, or glass/glass.

Line data communication module (LDCM)

The line data communication module is used for binary signal transfer. 

Each module has one optical port, one for each remote end to which the IED communicates.

Alternative cards for Long range (1550 nm single mode), Medium range (1310 nm single mode) and

Short range (900 nm multi mode) are available.

GPS time synchronization module (GSM)

This module includes the GPS receiver used for time synchronization. 

The GPS has one SMA contact for connection to an antenna.

Transformer input module (TRM)

The transformer input module is used to galvanically separate and transform the secondary currents and voltages generated by the measuring transformers. 

The module has twelve inputs in different combinations.

High impedance resistor unit

The high impedance resistor unit, with resistors for pick-up value setting and a voltage dependent

resistor, is available in a single phase unit and a three phase unit. 

Both are mounted on a 1/1 19 inch apparatus plate with compression type termnals.

Binary input/output module (IOM)

The binary input/output module is used when only a few input and output channels are needed. 

The ten standard output channels are used for trip output or any signalling purpose. 

The two high speed signal output channels are used for applications where short operating time is essential. 

Eight optically isolated binary inputs cater for required binary input information.

mA input module (MIM)

The milli-ampere input module is used to interface transducer signals in the –20 to +20 mA range

from for example OLTC position, temperature or pressure transducers.

The module has six independent, galvanically separated channels.

Optical ethernet module (OEM)

The optical fast-ethernet module is used to connectan IED to the communication buses 

(like the station bus) that use the IEC 61850-8-1 protocol. 

The module has one or two optical ports with ST connectors.

Serial SPA/IEC 60870-5-103 and LON

Hardware modules

Power supply module (PSM)

The power supply module is used to provide the correct internal voltages and full isolation between the terminal and the battery system. 

An internal fail alarm output is available.

Binary input module (BIM)

The binary input module has 16 optically isolated inputs and is available in two versions, 

one standard and one with enhanced pulse counting capabilities on the inputs to be used with the pulse counter function. 

The binary inputs are freely programmable and can be used for the input of logical signals to any of the functions.

They can also be included in the disturbance recording and event-recording functions. 

This enables extensive monitoring and evaluation of operation of the IED and for all associated electrical circuits.

Binary output modules (BOM)

The binary output module has 24 independent output relays and is used for trip output or any signal ling purpose.

The auto-reclose for single-, two- and/or three phase reclosing includes priority circuits for multi-breaker arrangements. 

It co-operates with the synchrocheck function with high-speed or delayed reclosing.

High set instantaneous phase and earth overcurrent, four step directional or un-directional delayed phase and earth overcurrent,

thermal overload and two step under and overvoltage functions are examples of the available functions allowing the

user to fulfill any application requirement.

The IED can also be provided with a full control and interlocking functionality including co-operation 

with the synchrocheck function to allow integration of the main or back-up control.

The advanced logic capability, where the user logic is prepared with a graphical tool, 

allows special applications such as automatic opening of disconnectors in multi-breaker arrangements, closingof breaker rings, load transfer logics etc. 

The graphical configuration tool ensures simple and fast testing and commissioning.

Serial data communication is via optical connections to ensure immunity against disturbances.

The wide application flexibility makes this product an excellent choice for both new installations and the refurbishment of existing installations.

Application

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.

• Logic

– Tripping logic (PTRC, 94)

– Trip matrix logic

– Configurable logic blocks

– Fixed signal function block

• Monitoring

– Measurements (MMXU)

– Supervision of mA input signals (MVGGIO)

– Event counter (GGIO)

– Event function

– Disturbance report (RBDR)

– Fault locator (RFLO)

• Metering

– Pulse counter logic (GGIO)

• Station communication

– IEC61850-8-1 communication

– LON communication protocol

– SPA communication protocol

– IEC 60870-5-103 communication protocol

– Horizontal communication via GOOSE for interlocking

– Single command, 16 signals

– Multiple Command, 80 blocks with 16 signals each

– Ethernet configuration of links

• Remote communication

– Binary signal transfer

• Basic IED functions

– Self supervision with internal event list

– Time synchronization (TIME)

– Parameter setting groups

– Test mode functionality (TEST)

– Change lock function

– IED identifiers

– Rated system frequency

• Hardware

– Power supply module (PSM)

– Binary input module (BIM)

– Binary output module (BOM)

– Binary in/out module (IOM)

– mA input module (MIM)

– Transformer input module, standard compression connection terminals (TRM)

– Optical ethernet module (OEM)

– SPA/LON/IEC module (SLM)

– Line data communication module (LDCM)

– GPS time synchronization module (GSM)

• Accessories

– GPS antenna, including mounting kit

– External interface converter from C37.94 to  G703

– High impedance resistor unit

– Test switch module RTXP24

– On/off switch

• Voltage protection

– Two step undervoltage protection (PUVM, 27)

– Two step overvoltage protection (POVM, 59)

– Two step residual overvoltage protection (POVM, 59N)

– Overexcitation protection (PVPH, 24)

• Frequency protection

– Underfrequency protection (PTUF, 81)

– Overfrequency protection (PTOF, 81)

– Rate-of-change frequency protection (PFRC, 81)

• Multipurpose protection

– General current and voltage protection (GAPC)

• Secondary system supervision

– Current circuit supervision (RDIF)

– Fuse failure supervision (RFUF)

• Control

– Synchrocheck and energizing check (RSYN, 25)

– Autorecloser (RREC, 79)

– Apparatus control for single bay, max 8 app.(1CB) incl. Interlocking (APC8)

– Apparatus control for single bay, max 15 app.(2CBs) incl. Interlocking (APC15)

• Scheme communication

– Scheme communication logic for distance protection (PSCH, 85)

– Current reversal and weak-end infeed logic for distance protection (PSCH, 85)

– Local acceleration logic (PLAL)

– Scheme communication logic for residual overcurrent protection (PSCH, 85)

– Current reversal and weak-end infeed logic for residual overcurrent protection (PSCH, 85)

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)

• Current protection

– Instantaneous phase overcurrent protection (PIOC, 50)

– Four step phase overcurrent protection (POCM, 51/67)

– Instantaneous residual overcurrent protection (PIOC, 50N)

– Four step residual overcurrent protection (PEFM, 51N/67N)

– Thermal overload protection, one time constant (PTTR, 26)

– Breaker failure protection (RBRF, 50BF)

– Stub protection (PTOC, 50STB)

– Pole discordance protection (RPLD, 52PD)

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

– Selectable energizing direction

– Two functions with built-in voltage selection

– For automatic or manual synchrocheck and with different settings

• 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