Archives

Event log

To collect sequence-of-events information, the relay has a

nonvolatile memory capable of storing 1024 events with the

associated time stamps. The nonvolatile memory retains its

data even if the relay temporarily loses its auxiliary supply. The

event log facilitates detailed pre- and post-fault analyses of

feeder faults and disturbances. The considerable capacity to

process and store data and events in the relay facilitates

meeting the growing information demand of future network

configurations.

The sequence-of-events information can be accessed either via

local HMI or remotely via the communication interface of the

relay. The information can also be accessed locally or remotely

using the Web HMI.

Disturbance recorder

The relay is provided with a disturbance recorder featuring

preconfigured analog and binary channels.The analog channels

can be set to record either the waveform or the trend of the

currents and voltages measured.

The analog channels can be set to trigger the recording function

when the measured value falls below or exceeds the set values.

The binary signal channels can be set to start a recording either

on the rising or the falling edge of the binary signal or on both.

By default, the binary channels are set to record external or

internal relay signals, for example, the start or trip signals of the

relay stages, or external blocking or control signals. Binary relay

signals, such as protection start and trip signals, or an external

relay control signal via a binary input, can be set to trigger the

recording. Recorded information is stored in a nonvolatile

memory and can be uploaded for subsequent fault analysis.

Measurement

The relay continuously measures high-impedance and neutral currents.

The measured values can be accessed via the local HMI or

remotely via the communication interface of the relay. The

values can also be accessed locally or remotely using the Web HMI.

Disturbance recorder

The relay is provided with a disturbance recorder featuring

preconfigured analog and binary channels.The analog channels

can be set to record either the waveform or the trend of the

currents and voltages measured.

The analog channels can be set to trigger the recording function

when the measured value falls below or exceeds the set values.

The binary signal channels can be set to start a recording either

on the rising or the falling edge of the binary signal or on both.

By default, the binary channels are set to record external or

internal relay signals, for example, the start or trip signals of the

relay stages, or external blocking or control signals. Binary relay

signals, such as protection start and trip signals, or an external

relay control signal via a binary input, can be set to trigger the

recording. Recorded information is stored in a nonvolatile

memory and can be uploaded for subsequent fault analysis.

Control

The relay offers control of one circuit breaker or contactor with

dedicated push buttons for opening and closing via the local

HMI or a remote system, for example, PCM600.

By default, the relay is equipped with a single input interlocking

scheme. Binary GOOSE messaging can be used in the creation

of additional interlocking schemes, such as secured object

control (SOC), blocking-based protection schemes or external tripping.

These additional protection and control schemes required by

specific applications are configured using the local HMI, the

Web HMI and the optional application functionality of PCM600.

The local HMI and the Web HMI can be utilized for signal

configuration, while PCM600 is required for the configuration of

GOOSE messaging.

In addition, COM600S can be used as a local data warehouse

for the substation’s technical documentation and for the

network data collected by the devices. The collected network

data facilitates extensive reporting and analyzing of network

fault situations by using the data historian and event handling

features of COM600S. The historical data can be used for

accurate monitoring of process and equipment performance,

using calculations based on both real-time and historical

values. A better understanding of the process dynamics is

achieved by combining time-based process measurements

with production and maintenance events.

COM600S can also function as a gateway and provide

seamless connectivity between the substation devices and

network-level control and management systems, such as

MicroSCADA Pro and System 800xA.

Compared to traditional hard-wired, inter-device signaling,

peer-to-peer communication over a switched Ethernet LAN

offers an advanced and versatile platform for power system

protection. The implementation of the IEC 61850 substation

automation standard enables access to distinctive features

including fast software-based communication, continuous

supervision of the protection and communication system’s

integrity, and inherent flexibility for reconfiguration and upgrades.

At substation level, COM600S uses the data content of the bay

level devices to enhance substation level functionality.

COM600S features a Web browser-based HMI, which provides

a customizable graphical display for visualizing single-line

mimic diagrams for switchgear bay solutions. The Web HMI of

COM600S also provides an overview of the whole substation,

including relay-specific single-line diagrams, which makes

information easily accessible. Substation devices and

processes can also be remotely accessed through the Web

HMI, which improves personnel safety.

Supported ABB solutions

The 611 series protection relays together with the Substation

Management Unit COM600S constitute a genuine IEC 61850

solution for reliable power distribution in utility and industrial

power systems. To facilitate the system engineering, ABB’s

relays are supplied with connectivity packages. The

connectivity packages include a compilation of software and

relay-specific information and a full relay data model. The data

model includes event and parameter lists. With the connectivity

packages, the relays can be readily configured using PCM600

and integrated with COM600S or the network control and

management system MicroSCADA Pro.

The 611 series relays offer native support for the IEC 61850

standard, including limited binary GOOSE messaging.

Application

The high-impedance principle for busbar differential protection

provides a secure and dependable protection scheme against

faults within the measured zone. The high-impedance principle

has been used for many years for differential protection due to

the capability to manage through-faults also with heavy current

transformer (CT) saturation.

The relay’s high-impedance protection functions contain a

built-in blocking functionality, which is provided by the bus-wire

supervision functions to restrict faulty operations in case of

faults in the measurement circuits.

Additional standby (residual) earth-fault protection is provided

by the two non-directional earth-fault stages. The standby

earth-fault protection can be used together with the high

impedance protection functionality to protect motors,

generators and transformers against residual earth faults. The

measurements are taken from the earthing point of the protected object.

The residual earth-fault protection can also be used as bus-wire

supervision especially in new or retrofitting applications where

an earth-fault protection function is used for grounding the

measurement circuits where a short circuit or a break has

occurred. The grounding can be done by an external relay.

Application

REB611 offers bus-differential protection in a single zone with

bus-wire supervision. It also offers the possibility for bus

differential protection over two zones using two REB611 relays.

The combined restricted earth-fault and residual earth-fault

protection functionalities of the relay enable its use in the

protection of a motor or generator. Due to the individuality of

the high-impedance protection functions, a single relay can be

used for restricted earth-fault protection of both the high and

low voltage sides of a power transformer.

REB611 offers phase-segregated (three phases) high

impedance differential protection and non-directional earth

fault protection for busbars, motors and generators. The relay

also offers high-impedance differential-based restricted earth

fault protection for motors, generators, reactors and power

transformers. REB611 is ideally suited for backup protection.

Protection functions

REB611 offers phase-segregated (three phases) high

impedance differential protection and non-directional earth

fault protection for busbars, motors and generators. The relay

also offers high-impedance differential-based restricted earth

fault protection for motors, generators, reactors and power

transformers. REB611 is ideally suited for backup protection.

Application

REB611 offers bus-differential protection in a single zone with

bus-wire supervision. It also offers the possibility for bus

differential protection over two zones using two REB611 relays.

The combined restricted earth-fault and residual earth-fault

protection functionalities of the relay enable its use in the

protection of a motor or generator. Due to the individuality of

the high-impedance protection functions, a single relay can be

used for restricted earth-fault protection of both the high and

low voltage sides of a power transformer.