Toshiba G1IF1 User manual

6F2S0755
INSTRUCTION MANUAL
OPTICAL INTERFACE UNIT
(CROSS-SITE FIBRE LINK UNIT)
G1IF1
© Toshiba Energy Systems & Solutions Corporation 2017
All Rights Reserved.
( Ver. 0.7 )

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Safety Precautions
Before using this product, please read this chapter carefully.
This chapter describes the safety precautions recommended when using the optical interface unit
type G1IF1. Before installing and using the equipment, this chapter must be thoroughly read and
understood.
Explanation of symbols used
Signal words such as DANGER, WARNING, and two kinds of CAUTION, will be followed by
important safety information that must be carefully reviewed.
Indicates an imminently hazardous situation which will result in death or
serious injury if you do not follow the instructions.
Indicates a potentially hazardous situation which could result in death or
serious injury if you do not follow the instructions.
CAUTION Indicates a potentially hazardous situation which if not avoided, may result in
minor injury or moderate injury.
CAUTION Indicates a potentially hazardous situation which if not avoided, may result in
property damage.
DANGER
WARNING

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Exposed terminals
Do not touch the terminals of this equipment while the power is on, as the high voltage generated
is dangerous.
Residual voltage
Hazardous voltage can be present in the DC circuit just after switching off the DC power supply.
It takes approximately 30 seconds for the voltage to discharge.
Fibre optic
When connecting this equipment via an optical fibre, do not look directly at the optical signal.
CAUTION
Earth
The earthing terminal of the equipment must be securely earthed.
CAUTION
Operating environment
The equipment must only used within the range of ambient temperature, humidity and dust
detailed in the specification and in an environment free of abnormal vibration.
Ratings
Before applying the DC power supply to the equipment, check that they conform to the
equipment ratings.
Connection cable
Carefully handle the connection cable without applying excessive force.
Modification
Do not modify this equipment, as this may cause the equipment to malfunction.
Disposal
When disposing of this equipment, do so in a safe manner according to local regulations.
WARNING

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Contents
Safety Precautions 1
1. Introduction 4
2. Application 4
3. Description 5
3.1 General Description 5
3.2 Electrical Connections 6
3.3 Indications 10
3.4 Response during Communication Fail 10
4. Installation 11
4.1 Receipt of Relays 11
4.2 Mounting 11
4.3 Electrostatic Discharge 11
4.4 Handling Precautions 11
4.5 External Connections 12
5. Commissioning and Maintenance 13
5.1 General 13
5.2 Precautions 13
5.3 Preparation 13
5.4 Commissioning Procedure 14
5.5 Maintenance 14
Appendix A Outline of Optical Interface Unit 15
Appendix B Technical Data 19
The data given in this manual are subject to change without notice. (Ver. 0.7)

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1. Introduction
The Optical interface unit G1IF1 facilitates connection of the fibre optic protection signalling
channel of the GRL100 line differential relay to remote multiplexing equipment associated with
a switched telecommunications network. This manual should be used in conjunction with the
manual for the GRL100 relay.
Table 1 G1IF1 Models
Model
Telecommunication
Outer case
G1IF1-01
X.21
With outer case
G1IF1-02
CCITT-G703-1.2.1
Option(*)
G1IF1-03
CCITT-G703-1.2.2 or -1.2.3
Option(*)
G1IF1-04
X.21
Option(*)
(*): If the outer case is required, it is ordered separately as option. See Appendix C.
2. Application
The Optical interface unit G1IF1 provides a connection between a fibre optic communications
channel and a switched telecommunications network. It is applied in the protection signalling
channel of the GRL100 line differential relay, allowing two GRL100 relays to communicate over
a telecommunications channel.
The G1IF1 provides an interface for connection of the fibre optic protection signalling port of the
GRL100 relay to remote multiplexing equipment having a standard CCITT G703 or X.21 type
interface to the electrical connections of a telecommunications system. Figure 2.1 illustrates the
application of the G1IF1 unit.
Figure 2.1 Application of G1IF1 Unit
In most situations the telecommunications equipment is remote from the protection equipment in
the substation. The G1IF1 unit is normally located close to the multiplexer and may be up to 2km
away from the GRL100 relay. The fibre optic cable must be either 50/125m (for distances up to
1km) or 62.5/125m (for distances up to 2km) and should be terminated with standard ST type
connectors.
The G1IF1 is connected to the switched telecommunications network via a multiplexer. The
interface is defined according to the CCITT G703 or X.21 standard. The connections should be
made using shielded, twisted pair cable.
GRL100
Line
Diff.
Relay
G1IF1
Switched
Telecomms
Muliplexer
Fibre
Optic
Cable
CCITT G703
or X.21
Interface

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3. Description
3.1 General Description
Figure 3.1 illustrates the operation of the Optical interface unit. The GRL100 relay and the
telecommunications multiplexer are illustrated to facilitate the explanation.
The G1IF1 unit provides three fibre optic connectors. The transmitter / receiver pair TX/RX
connect to the GRL protection signalling channel. The clock transmitter CLK can be used to
transmit the CCITT-G703-1.2.3(1.2.2) or X.21 timing signal, although it is not required in
applications such as this, where the receive signal from the G703-1.2.3(1.2.2) or X.21 is
synchronized to the clock signal. The CLK is not used for the CCITT-G703-1.2.1 interface. An
additional connection point, labelled SPARE (not shown in Figure 3.1), can be used for fitting of
a spare fibre optic cable.
Optical to electrical and electrical to optical conversion is performed on the transmit and receive
signals from the GRL100 relay respectively. CMI type encoding is used for the optical signals.
CMI encoding always results in a 50% duty factor, making the signals easy to check during
commissioning.
Code conversion is performed for connection to the CCITT-G703 or X.21 interface. G703 or
X.21 is a synchronous interface, and provides a 64kHz timing signal, which the G1IF1 uses for
synchronisation. The connections to the G703 or X.21 interface use balanced drivers and
receivers in accordance with the G703 or RS422A/V.11 standard.
GRL100
G1IF1
Telecomms
Muliplexer
50/125m
62.5/125m
Fibre
CCITT G703
Cable
Code
Conversion
Sync.
E/O
E/O
Serial
Comms
Interface
Sync.
64kHz
O/E
O/E
Code
Conversion
+
-
Auxiliary DC
Supply
DC/DC
Converter
TX
TX
RX
RX
CLK
E/O
O/E
CLK
()
(): not required for CCITT G703 1.2.1.
Figure 3.1 Operation of G1IF1 Unit

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3.2 Electrical Connections
A 12-way ring terminal, connector TB1 of G1IF1 provides connections for the auxiliary dc
supply as well as test points for the telecommunications channel. The G1IF1-01 provides the
additional X.21 connector is a 15-way DIN type.
The G1IF1 auxiliary dc supply input has a nominal 48V rating as standard for communications
equipment. However the G1IF1 can also be provided with dc 110/125V rating or dc 220/250V
rating for 110/125V or 220/250V substation battery supplies.
The connections to the G1IF1-01 are shown in Figure 3.2 (a), not including the test points. The
figure also illustrates the functions of three removable links. The X.21 interface circuit is
designed for 500V isolation against the rest of the system. However, it may not be desirable to
leave the common connection floating, particularly where high levels of interference are
expected. Therefore the X.21 common can be tied via a 10kresistance to the frame ground, by
fitting link J1. Alternatively, the fitting of links JIG and JFG connects the X.21 common directly
to the frame ground.
It is recommended that a shielded cable be used for the X.21 interface. The shield should be tied
directly to the frame ground by the fitting of link JFG.
ＤＣ／ＤＣ
I
S
O
L
A
T
I
O
N
Code
Conversion
GRL100 Relay
Fibre-optic cable
O/E
E/O
TX
RX
+5V
0V
+
-
Code
Conversion
A ４
A6
8
TX
CLK
RX
Communication
equipment
(X.21 interface
:D-sub 15pin)
Power on
Data from COM
Data from Relay
CLK from COM
TB1-2
TB1-1
TB1-3
FG
P
N
E/O
CLK
SG
R
CG
1
JFG
JIG
J1
A2
B9
B11
B13
FG
LG
FG
Figure 3.2 (a) Connection Diagram for G1IF1-01 and G1IF1-04

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Figure 3.2 (b) shows the connections for G1IF1-02 and -03.
TB1-12
Code
Conversion
GRL100 Relay
Fibre-optic cable
O/E
E/O
TX
RX
Code
Conversion
TB1-8
TB1-10
TX
CLK
RX
Communication
equipment
Power on
TX from COM
TX from RELAY
CLK from COM
E/O
CLK
TB1- 6
TB1- 7
TB1-9
TB1-11
+5V
0V
+
-
TB1-2
TB1-1
TB1-3
FG1
P
N
LG
FG
G703 1.2.3(1.2.2)
I/F only
FG2
ＤＣ／ＤＣ
Figure 3.2 (b) Connection Diagram for G1IF1-02 and G1IF1-03

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Figure 3.3 shows the signal definitions for the G703 or X.21 connection, note that a number of
the signals specified for the standard are not required for this application. Table 3.1 specifies all
electrical connections to the G1IF1 unit.
(a) Signal Definitions for G1IF1-01 (X.21) Interface
(b) Signal Definitions for G1IF1-02 and -03 (G703) Interface
Figure 3.3 Signal Definitions
11
1
6
7
8
9
10
Shield Ground
Ta
FG
Tb
Ra
Rb
Sa
Sb
CG
Transmit
Receive
Signal
Timing
G1IF1-02, 03
Telecommunications
Multiplexer
(G703 1.2.3, 1.2.2 I/F only)
13
1
2
9
3
10
4
11
5
12
6
7
15
8
14
Shield Ground
Ta
SG
Tb
Ra
Rb
Sa
Sb
CG
Common Ground
Transmit
Receive
Signal
Timing
G1IF1-01
Telecommunications
Multiplexer

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Table 3.1 Electrical Connections
(a) Electrical Connections to the G1IF1-01 and -04 (X.21)
Circuit
Signal
Signal
Terminal Numbers
Name
Type
TB1
X.21
Transmit
Ta
V.11/RS422
6
2
Tb
V.11/RS422
7
9
Timing
Sa
V.11/RS422
10
6
Sb
V.11/RS422
11
13
Receive
Ra
V.11/RS422
8
4
Rb
V.11/RS422
9
11
Power
Supply
P
2
-
N
3
-
Ground/
Common
FG
Frame Ground
1
-
LG
Internal Common
-
-
SG
Shield Ground
-
1
CG
Common Ground
12
8
(b) Electrical Connections to the G1IF1-02 and -03 (G703)
Circuit
Signal
Signal
Terminal Numbers
Name
Type
TB1
Transmit
Ta
CCITT G703
6
Tb
CCITT G703
7
Timing
Sa
CCITT G703
10
Sb
CCITT G703
11
Receive
Ra
CCITT G703
8
Rb
CCITT G703
9
Power
Supply
P
2
N
3
Ground/
Common
FG1
Frame Ground
1
LG
Internal Common
-
FG2
Shield Ground
12
CG
Common Ground
-
DC rated voltage
48V dc

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3.3 Indications
The G1IF1 unit provides four light emitting diodes (LEDs) for indication purposes. Table 3.2
details the labels, colours and functions associated with each LED.
Table 3.2 Indication LEDs
LED Label
Colour
Function
Power
Green
Lit when auxiliary dc power is present
TX from COM
Yellow
Indicates data transmission from the telecommunications channel to the
GRL100 relay
TX from RELAY
Yellow
Indicates data transmission from the GRL100 relay to the
telecommunications channel
CLK from COM
Yellow
Indicates the timing signal from the G703 or X.21 interface.
3.4 Response during Communication Fail
(1) When the data transmission from telecommunication multiplexer to G1IF1 is stopped:
The LED “TX from COM”turns off and the data “0”is transmitted to the relay. At that time,
the relay at local terminal detects a communication failure.
(2) When the data transmission on fibre optic interface from the relay to G1IF1 is stopped:
The LED “TX from RELAY”turns off and the send signal (the voltage between terminals
TB1-6 and TB1-7) becomes “0V”. “0V”means undefined data in G703-1.2.1 and means “0”
data in G703-1.2.2 / 1.2.3.
(3) When the timing signal from telecommunication multiplexer to G1IF1 is stopped:
The LED “CLK from COM”turns off and the data transmission on fibre optic interface from
G1IF1 to the relay is stopped. The data transmission to telecommunication multiplexer is
continued. The relay at the remote terminal detects a communication failure intermittently
because the bit synchronising between the relay at the local terminal and telecommunication
multiplexer.

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4. Installation
4.1 Receipt of Relays
On receiving the G1IF1, carry out the acceptance inspection immediately. In particular, check for
damage during transportation, and if any is found, contact the vendor.
Always store the unit in a clean, dry environment.
4.2 Mounting
Refer to Appendix A for details of mechanical fixings.
4.3 Electrostatic Discharge
CAUTION
The printed circuit board (PCB) within the G1IF1 is not intended to be a removable module. Do
not remove the PCB from the unit case, since electronic components on the PCB are very
sensitive to electrostatic discharge. If it is absolutely essential to take the PCB out of the case, do
not touch the electronic components and terminals with your bare hands. Additionally, always
put the PCB in a conductive anti-static bag when storing it.
4.4 Handling Precautions
A person's normal movements can easily generate electrostatic potential of several thousand
volts. Discharge of these voltages into semiconductor devices when handling electronic circuits
can cause serious damage, which often may not be immediately apparent but the reliability of the
circuit will have been reduced.
The electronic circuits are completely safe from electrostatic discharge when housed in the case.
Do not expose them to risk of damage by removing the PCB unnecessarily.
The unit incorporates the highest practicable protection for its semiconductor devices. However,
if it becomes necessary to remove the PCB, precautions should be taken to preserve the high
reliability and long life for which the equipment has been designed and manufactured.
CAUTION
Before removing the PCB, ensure that you are at the same electrostatic potential as the
equipment by touching the case.
Handle only the edges of the PCB. Avoid touching the electronic components, PCB
surface or connectors.
Do not pass the PCB to another person without first ensuring you are both at the same
electrostatic potential. Shaking hands achieves equipotential.
Place the PCB on an anti-static surface, or on a conducting surface which is at the same
potential as yourself.
Do not place the PCB in a polystyrene tray.
It is strongly recommended that detailed investigations on electronic circuitry should be carried
out in a Special Handling Area such as described in the IEC 60747.

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4.5 External Connections
External connections to the G1IF1 are shown in section 3.2. There are three types of connection
to the unit.
The fibre optic connections are made with standard ST type connectors. Transmitters are of the
LED type. When handling fibre optic cables, care should be taken so as not to cause damage by
rough treatment or by exceeding the minimum bend radius of the fibre.
The CCITT G703 interface connection is made with a ring terminal block labeled TB1. The X.21
interface connection is made with a standard 15-way DIN type connector.
The power supply and safety earth connections should be made with ring-type crimp terminals to
the terminal block TB1.

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5. Commissioning and Maintenance
5.1 General
The G1IF1 should be commissioned in conjunction with the GRL100 relay with which it is
specified.
Test personnel must be familiar with general relay testing practices and safety precautions to
avoid personal injuries or equipment damage.
5.2 Precautions
CAUTION
The unit is provided with a grounding terminal.
Before starting the work, always make sure the unit is grounded.
Ensure that the auxiliary supply connections are properly fixed to their terminals.
Before turning on the power, check that the polarity and voltage of the power supply are
correct.
Turn off the auxiliary supply before checking the interior of the unit.
While the power is on, do not mount/dismount the PCB.
Failure to observe any of the precautions above may cause damage or malfunction of the unit.
Refer to section 4.4 for information on handling precautions.
5.3 Preparation
Test equipment
The following test equipment is required for the commissioning tests.
DC power supply.
Calibrated voltmeter.
Visual inspection
After unpacking the product, check for any damage to the case. If there is any damage, the
internal module might also have been affected. Contact the vendor.
Unit ratings
Check that the items described on the nameplate on the front of the unit conform to the user’s
specification. The items are: unit type and model, and auxiliary DC supply voltage rating.

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5.4 Commissioning Procedure
The G1IF1 should be commissioned in conjunction with the GRL100 relay with which it is
specified. Refer to the GRL100 manual for full details. It is necessary to commission both ends of
the protection scheme together.
Ensure that all necessary communication connections are made at each end of the protection
scheme. Apply auxiliary power to both GRL100 relays and to both G1IF1 units. Any failure in
communication will be indicated by the GRL100 relays. If communication is healthy then
proceed with commissioning of the GRL100 relays.
5.5 Maintenance
Periodic maintenance is not necessary.

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Appendix A
Outline of Optical Interface Unit

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Dimensions and Connections
ＴＯＳＨＩＢＡ
168
180
195
130
66
2- Φ5
2-5×9
RX
ＴＢ１
1
12
TX
CLK
SPARE
X.21
156
Power
TX from COM
TX from RELAY
CLK from COM
For G1IF1-01, and
G1IF1-04 only

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Outer Case Dimensions for G1IF1-01
4-Φ6
166
200
226
246
266
300
326
346
87
CROSS SITE FIBRE LINK UNIT

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Outer Case Dimensions for G1RK7-0102 and -0103 (Option)
4-Φ6
166
200
226
246
266
300
326
346
87
OPTICAL INTERFACE UNIT
For G1RK7-0103 only

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Appendix B
Technical Data