Communication Networks

OPTIF for FOX515/512IEEE C37.94 communication interface

One of the most important applications used by any power utility is protection of high voltage power lines. Protection relays, which provide the protection functionality for power lines, need to exchange information in order to ensure correct operation. The utility's captive communications network is normally used to provide reliable communications channels for protection applications. Such communications channels demand highest availability and performance figures, espe-cially for differential protection applications which require very low and symmetrical end-to-end delay times.

Transmitting protection relay data channels via communication network instead of direct relay connection using dedicated fibres has the big advantage of complete supervision of the data chan-nel and the possibility for redundant channel routing. Beside this it also saves fibres, which are valuable assets. Supervision of the data channel and redundant channel routing allow to significantly increase the availability of protection applications.

The substation environment is usually characterized by a high level of electromagnetic fields caused by high voltages and currents in power lines. Specially during fault conditions the same can rise significantly and disturb communications channels based on copper wires. So it is recommended to use a complete optical interconnection from relay to relay via fibre optical multiplex equip-ment using the IEEE C37.94 protocol.

The IEEE C37.94 standard defines the communication of protec-tion equipment (protections relays) with communications equip-ment inside a substation using optical fibers. Accordingly no additional extern converters are required anymore. This standard is already implemented by many protection relay manufactur-ers around the world. ABB’s latest relay series REx670 and the teleprotection equipment NSD570 support this standard as well.The OPTIF module (OPtical Teleprotection InterFace) extends the FOX515/512 platform with IEEE C37.94 interfaces while ensuring compatibility with the traditional ABB SFC protocol used by legacy ABB protection relays.

2 | OPTIF for FOX515/512

OPTIF architecture The OPTIF is part of a large complement of interface modules which can be plugged into a FOX515 shelf. Like all FOX515 modules OPTIF is– powered from the FOX515 shelf– configured by UCST and– supervised by FOXMAN management system4 optical ports equipped with SFPs on the front allow indi-vidual configuration to support either– ANSI/IEEE C37.94 standard or– ABB’s traditional SFC protocol Additionally an Ethernet port is provided, compatible with DATAx and ETER1/LAWA4 module

Symmetric transmission delayDifferential protection relays usually calculate the delay times of the data channel by a round trip delay measurement. Therefore asym-metrical delay times can not be detected and lead to the possibility of wrong trips.

OPTIF solves this problem by ensuring the same data routing for the transmit and receive paths. In case of redundant channel configuration, OPTIF ensures symmetrical protection switching for differential protection data channels. This ensures equal delay times on transmit and receive paths under all circumstances and therefore avoids the possibility for false tripping of the protection relay due to asymmetrical delay times.

Main features– Fully supporting ANSI/IEEE C37.94 (64 – 768 kbit/s pay load)– 4 ports individually configurable for: – IEEE C37.94 on 850 nm multi mode fiber

– ABB’s proprietary SFC protocol on 1,310 nm single-mode fiber

– All 4 optical ports using SFPs, supporting multimode and single-mode fibers depending on selected type of interface

– 1 Ethernet port configurable as – electrical port 10/100 BaseT (RJ45), or – optical port when equipped with SFP

– Transmission delay time: Fully symmetrical bidirectional communication on normal operation and also in protected mode (working and protect-ing path)

– Fully integrated in FOX515/512 platform (1 mechanical slot)

For connections based on ABB’s SFC protocol, SFPs for single-mode fibers on 1,310 nm are required. This solu-tion has been successfully implemented for many years in substations around the world together with ABB’s protection relays REL316, REL551, REL561 or teleprotection equipment NSD570 (G1LO-interface).

In addition to these four optical dual-use ports, one additional port is added on the module operating as an Ethernet port with optical or electrical interface:– 10/100 BaseT (RJ45), electrical port or optical port when

equipped with a suitable SFP

Management SystemThe FOX515 with a variety of services are managed centrally by UCST/FOXMAN management system. Utilities save cost and accelerate the circuit provisioning process with only one element manager for all service types.

Applications with OPTIFFOX515 collects all utility specific signals and transmits the same through Wide Area Networks (WAN) using fibre optical or copper interfaces. Therefore the FOX515 provides standard data interfaces and utility specific interfaces such as the OPTIF module which provides up to four ports for differential protection signal transmission.

FOX515 multi-service multiplexer

All-optical interconnection

FOX515 with OPTIF module

4x

IEEE

C37.94

Voice

Data

HV power line

FOX515 with OPTIF module

4x

Substation "A" Substation "B"

Utility communicatione.g. STM-1 or STM-4

RED C37.94

Voice

Data

REDRED

IEEE

OPTIF for FOX515/512 | 3

General

Designed for FOX515/512, P-BUS access

Number of ports Maximum 4 ports per OPTIF module

Optical ports All optical ports require SFP for: – 850 nm (multimode) or – 1,310 nm (single-mode)

Operation mode IEEE C37.94 or ABB TPE

Module width 1 mechanical slot in FOX515

Environmental conditions According to FOX515 specification

Configuration tool UCST release R8B SP02 or higher

Maintenance – Local and remote test loops available

– Performance monitoring

Typical 1+1 switchover time

≤ 25 ms

Standard compliance IEEE C37.94

MTTF > 60 years

Technical data

SFP transceivers The optical parameters are subject to the selected SFP transceiver module. The following table shows the characteristics of the SFP transceiver modules approved for these applications:

Interfaces

Interface type IEEE C37.94 ABB type Ethernet

Max port number 4 4 1

Type of port (Connector) Optical SFP (LC-PC) Optical SFP (LC-PC) Electrical RJ45 or optical SFP

Framing complying to ANSI/IEEE C37.94 ABB SFC protocol 10/100 BaseT or 100 Base-FX

Data transmissionN x 64 kbit/s (N = 1 ... 12) 64 kbits/s – 768 kbit/s or 2,048 kbit/s transparent

N x 64 kbit/s (N = 1 ... 3)[Ch1, Ch2, RemAlm]

N x 64 kbit/s (N = 1 ... 30)or 2,048 kbit/s

Transmission bit rate 2,048 kbit/s optical 4,096 kbit/s optical ---

Signal bit rate 2,048 kbit/s (electrical) 2,048 kbit/s (electrical) ---

Optical line coding NRZ MCMI ---

Optical parameters IEEE C37.94 compliant ABB SFC protocol

Application example RED670NSD570/G1LOa

REL316, REL551, REL561NSD570/G1LO

Wavelength 850 nm 1,310 nm

Fiber type Multimode Single-mode

Optical output power (Tx)-19 - 11 dBm (62.5μm)-23 - 9 dBm (50μm)

-15 ... -8 dBm

Max allowed optical input power -3 dBm -3 dBm

Optical power budget, min13 dBm (62.5μm)11 dBm (50μm)

19 dB

Receiver sensitivity -32 dBm -34 dBm

Maximum distance (depending on total link attenuation)

2 km 30 ... 50 km

1KH

A -

001

122

- S

EN

1

000

- 03

.15

- P

rinte

d in

Sw

itzer

land

© A

BB

Sw

itzer

land

Ltd

. May

201

5 T

he r

ight

to m

odifi

catio

ns o

r de

viat

ions

due

to te

chni

cal p

rogr

ess

is re

serv

ed.

Type Despription Order number

OPTIF Optical Teleprotection Interface 1KHW001797R0001

SFP SFP Transceiver 850 nm, multimode 1KHW001871R0005

SFP SFP Transceiver 1310 nm, single-mode 1KHW001872R0001*

Optical cables: multimode

V9YE Duplex LC to ST, outside cabinet, 10 m 1KHW027541R0100

V9YF Duplex LC to LC cable, outside cabinet, 10 m 1KHW027542R0100

V9YG Duplex LC to LC cable, inside cabinet, 2 m 1KHW027543R0020

Optical cable: single-mode

V9KZ Duplex LC - FC/PC cable, outside cabinet, 10 m 1KHW027499R0100

V9KX Duplex LC - LC cable, outside cabinet, 10 m 1KHW027497R0100

V9KW Duplex LC - FC/PC cable, inside cabinet, 2 m 1KHW027496R0020

V9KU Duplex LC - LC cable, inside cabinet, 2 m 1KHW027494R0020

Electric cables: ethernet

LAN_1.005 Ethernet 1:1 cable, 3 m 1KHW027456R0030

LAN_X.006 Ethernet crossover cable, 3 m 1KHW027457R0030* SFP Transceiver modules are also suited for 100 Base-FX Ethernet applications.Other lengths available on request.

List of abbreviations

MCMI Modified Code Mark Inversion

NRZ Non Return to Zero

SFC Secure Frame Concept

SFP Small Form Pluggable

UCST Configuration Toll for

FOX515/512

For more information please contact:

ABB Switzerland Ltd. Power SystemsBruggerstrasse 72 5400 Baden, Switzerland Phone: +41 58 585 77 44Fax: +41 58 585 55 77 E-Mail: communication.networks@ch.abb.com www.abb.com/communicationnetworks

OPTIF ordering information

Substation relay & telecom cabinet

3rd party

RED 670

NSD570

REL316REL551REL561

FOX6Plus

Relay cabinet

Opticalconnector

Fiber pair Max. 4 ports

(up to 2 km)

SFP with LC-connector

AB

B S

FC IE

EE

C37

.94

FOX515

Patchpanel

OPTIF

Telecom cabinet

Opticalconnector

SDH network

Substation