Category: Industry Trends

Tools

The protection relay is delivered as a preconfigured unit. The

default parameter setting values can be changed from the front

panel user interface (local HMI), the Web browser-based user

interface (Web HMI) or Protection and Control IED Manager

PCM600 in combination with the relay-specific connectivity package.

PCM600 offers extensive relay configuration functions. For

example, depending on the protection relay, the relay signals,

application, graphical display and single-line diagram, and IEC

61850 communication, including horizontal GOOSE

communication, can be modified with PCM600.

When the Web HMI is used, the protection relay can be

accessed either locally or remotely using a Web browser

(Internet Explorer). For security reasons, the Web HMI is

enabled by default but it can be enabled via the local HMI. The

Web HMI functionality can be limited to read-only access.

The relay connectivity package is a collection of software and

specific relay information, which enables system products and

tools to connect and interact with the protection relay. The

connectivity packages reduce the risk of errors in system

integration, minimizing device configuration and setup times.

Further, the connectivity packages for protection relays of this

product series include a flexible update tool for adding one

additional local HMI language to the protection relay. The

update tool is activated using PCM600. and it enables multiple

updates of the additional HMI language, thus offering flexible

means for possible future language updates.

Selection and ordering data

The relay type and serial number label identifies the protection

relay. The label is placed above the local HMI on the upper part

of the plug-in-unit. An order code label is placed on the side of

the plug-in unit as well as inside the case. The order code

consists of a string of letters and digits generated from the

relay’s hardware and software modules.

Relay case and plug-in unit

The relay cases are assigned to a certain type of plug-in unit.

For safety reasons, the relay cases for current measuring relays

are provided with automatically operating contacts for short

circuiting the CT secondary circuits when a relay unit is

withdrawn from its case. The relay case is further provided with

a mechanical coding system preventing the current measuring

relay units from being inserted into relay cases intended for

voltage measuring relay units.

Mounting methods

•Flush mounting

•Semi-flush mounting

•Semi-flush mounting in a 25° tilt

•Rack mounting

•Wall mounting

•Mounting to a 19″ equipment frame

•Mounting with an RTXP 18 test switch to a 19″ rack

Panel cut-out for flush mounting

•Height: 161.5 ±1 mm

•Width: 165.5 ±1 mm

Relay case and plug-in unit

The relay cases are assigned to a certain type of plug-in unit.

For safety reasons, the relay cases for current measuring relays

are provided with automatically operating contacts for short

circuiting the CT secondary circuits when a relay unit is

withdrawn from its case. The relay case is further provided with

a mechanical coding system preventing the current measuring

relay units from being inserted into relay cases intended for

voltage measuring relay units.

Mounting methods

By means of appropriate mounting accessories, the standard

relay case can be flush mounted, semi-flush mounted or wall

mounted. The flush mounted and wall mounted relay cases can

also be mounted in a tilted position (25°) using special accessories.

Further, the relays can be mounted in any standard 19”

instrument cabinet by means of 19” mounting panels available

with cut-outs for one or two relays.Alternatively, the relays can

be mounted in 19” instrument cabinets by means of 4U

Combiflex equipment frames.

For routine testing purposes, the relay cases can be equipped

with test switches, type RTXP 18. which can be mounted side

by side with the relay cases.

When the relay is in the remote mode, it can execute

commands sent from a remote location. The relay supports the

remote selection of the local/remote mode via a binary input.

This feature facilitates, for example, the use of an external

switch at the substation to ensure that all relays are in the local

mode during maintenance work and that the circuit breakers

cannot be operated remotely from the network control center.

Local HMI

The relay is equipped with a four-line liquid crystal display.

Depending on the chosen font and language, the number of

visible lines may vary. The display is designed for entering

parameter settings of the protection and control functions. It is

also suited for remotely controlled substations where the relay

is only occasionally accessed locally via the front panel user interface.

The display offers front-panel user interface functionality with

menu navigation and menu views. Depending on the

configuration, the relay displays the related measuring values.

The local HMI includes a push button (L/R) for local/remote

operation of the relay. When the relay is in the local mode, it can

be operated only by using the local front-panel user interface.

When the relay is in the remote mode, it can execute

commands sent from a remote location. The relay supports the

remote selection of the local/remote mode via a binary input.

This feature facilitates, for example, the use of an external

switch at the substation to ensure that all relays are in the local

mode during maintenance work and that the circuit breakers

cannot be operated remotely from the network control center.

The IEC 61850 standard specifies network redundancy which

improves the system availability for substation communication.

The network redundancy is based on two complementary

protocols defined in the IEC 62439-3 standard: PRP and HSR

protocols. Both the protocols are able to overcome a failure of a

link or switch with a zero switch-over time. In both the

protocols, each network node has two identical Ethernet ports

dedicated for one network connection. The protocols rely on

the duplication of all transmitted information and provide a zero

switch-over time if the links or switches fail, thus fulfilling all the

stringent real-time requirements of substation automation.

In PRP, each network node is attached to two independent

networks operated in parallel, thus providing zero time recovery

and continuous checking of redundancy to avoid failures. The

networks are completely separated to ensure failure

independence, and can have different topologies.

The relay can send binary and analog signals to other devices

using the IEC 61850-8-1 GOOSE (Generic Object Oriented

Substation Event) profile. Binary GOOSE messaging can be

employed, for example, for protection and interlocking-based

protection schemes. The relay meets the GOOSE performance

requirements for tripping applications in distribution

substations, as defined by the IEC 61850 standard (<10 ms

data exchange between the devices).

For redundant Ethernet communication, the relay offers two

galvanic Ethernet network interfaces. A third port with galvanic

Ethernet network interface is also available providing

connectivity for any other Ethernet device to an IEC 61850

station bus inside a switchgear bay, for example connection of

a remote I/O. Ethernet network redundancy can be achieved

using the high-availability seamless redundancy protocol (HSR)

or the parallel redundancy protocol (PRP) or with a self-healing

ring using Rapid Spanning Tree Protocol (RSTP) in managed

switches. Ethernet redundancy can be applied to Ethernet

based IEC 61850 and Modbus protocols.

Station communication

The 611 series protection relays support the IEC 61850 and

Modbus® communication protocols. Operational information

and controls are available through these protocols. However,

some communication functionality, for example, horizontal

communication between the protection relays, is enabled only

by the IEC 61850 communication protocol.

The IEC 61850 protocol is a core part of the relay as the

protection and control application is fully based on standard

modelling. The relay supports Edition 1 and Edition 2 versions

of the standard. With Edition 2 support, the relay has the latest

functionality modelling for substation applications and the best

interoperability for modern substations. It incorporates also full

support for standard device mode functionality supporting

different test applications. Control applications can utilize the

new safe and advanced station control authority feature.

The IEC 61850 communication implementation supports

monitoring and control functions. Additionally, parameter

settings, disturbance recordings and fault records can be

accessed using the IEC 61850 protocol. Disturbance

recordings are available to any Ethernet-based application in

the standard COMTRADE file format. The relay supports

simultaneous event reporting to five different clients on the

station bus. The relay can exchange data with other devices

using the IEC 61850 protocol.