Link Layer ..................................................................................................................................................... 3
Time synchronisation ................................................................................................................................... 9
General interrogation .................................................................................................................................... 9
Disturbance records ................................................................................................................................... 10
2.9
Blocking of monitor direction ...................................................................................................................... 10
2.11 List of events produced by the relay .......................................................................................................... 11
2.12 List of data contained in General Interrogation .......................................................................................... 13
2.14 List of the supported commands ................................................................................................................ 15
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Introduction
This Protocol Manual is for use with Thytronic Protective Relays, such as the DMC, NTG and PRO-N series that
support the IEC 870-5-103 communication protocol.
Number of loads ……32…………. For one protection equipment
NOTE - EIA RS-485 standard defines unit loads so that 32 of them can be operated on one line. For detailed
information refer to clause 3 of EIA RS-485 standard.
8.1.2 Optical Interface
Glass fibre
Plastic fibre
F-SMA type connector
BFOC/2,5 type connector
8.1.3 Transmission speed
1 200 bit/s
9 600 bit/s
2 400 bit/s
19 200 bit/s
8.2 Link Layer
There are no choices for the link layer.
4 800 bit/s
38 400 bit/s
57 600 bit/s
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8.3 Application Layer
8.3.1 Transmission mode for application data
Mode 1 (least significant octet first), as defined in 4.10 of IEC 60870-5-4, is used exclusively in this companion
standard.
8.3.2 Common address of ASDU
One C
8.3.3 Selection of standard information numbers in monitor direction
8.3.3.1 System functions in monitor direction
INF Semantics
OMMON ADDRESS
More than one C
<0> End of general interrogation
<0> Time synchronization
of ASDU (identical with station address)
OMMON ADDRESS
of ASDU
<2> Reset FCB
<3> Reset CU
<4> Start/restart
<5> Power on
8.3.3.2 Status indications in monitor direction
INF Semantics
<16> Auto-recloser active
<17> Teleprotection active
<18> Protection active
<19> LED reset
<20> Monitor direction blocked
<21> Test mode
<22> Local parameter setting
<23> Characteristic 1
<24> Characteristic 2
<25> Characteristic 3
<26> Characteristic 4
<27> Auxiliary input 1
<28> Auxiliary input 2
<29> Auxiliary input 3
<30> Auxiliary input 4
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8.3.3.3 Supervision indications in monitor direction
INF Semantics
<32> Measurand supervision I
<33> Measurand supervision V
<35> Phase sequence supervision
<36> Trip circuit supervision
<37> I>> back-up operation
<38> VT fuse failure
<39> Teleprotection disturbed
<46> Group warning
<47> Group alarm
8.3.3.4 Earth fault indications in monitor direction
INF Semantics
<48> Earth fault L
1
PRON NA60-CB0
<49> Earth fault L
<50> Earth fault L
<51> Earth fault forward, i.e. line
<52> Earth fault reverse, i.e. busbar
8.3.3.5 Fault indications in monitor direction
INF Semantics
<64> Start /pick-up L
<65> Start /pick-up L
<66> Start /pick-up L
<67> Start /pick-up N
<68> General trip
<69> Trip L
<70> Trip L
<71> Trip L
<72> Trip I>> (back-up operation)
<73> Fault location X in ohms
<74> Fault forward/line
<75> Fault reverse/busbar
<76> Teleprotection signal transmitted
<77> Teleprotection signal received
<78> Zone 1
<79> Zone 2
<80> Zone 3
<81> Zone 4
1
2
3
2
3
1
2
3
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<82> Zone 5
<83> Zone 6
<84> General start/pick-up
<85> Breaker failure
<86> Trip measuring system L
<87> Trip measuring system L
<88> Trip measuring system L
<89> Trip measuring system E
<90> Trip I>
<91> Trip I>>
<92> Trip IN>
<93> Trip IN>>
8.3.3.6 Auto-reclosure indications in monitor direction
INF Semantics
<128> CB 'on' by AR
1
2
3
PRON NA60-CB0
<129> CB 'on' by long-time AR
<130> AR blocked
8.3.3.7 Measurands in monitor direction
INF Semantics
<144> Measurand I
<145> Measurands I, V
<146> Measurands I, V, P, Q
<147> Measurands IN, V
<148> Measurands I
8.3.3.8 Generic functions in monitor direction
INF Semantics
<240> Read headings of all defined groups
<241> Read values or attributes of all entries of one group
<243> Read directory of a single entry
<244> Read value or attribute of a single entry
<245> End of general interrogation of generic data
L1,2,3
EN
, V
L1,2,3
, P, Q, f
<249> Write entry with confirmation
<250> Write entry with execution
<251> Write entry aborted
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8.3.4 Selection of standard information numbers in control direction
8.3.4.1 System functions in control direction
INF Semantics
<0> Initiation of general interrogation
<0> Time synchronization
8.3.4.2 General commands in control direction
INF Semantics
<16> Auto-recloser on/off
<17> Teleprotection on/off
<18> Protection on/off
<19> LED reset
<23> Activate characteristic 1
<24> Activate characteristic 2
<25> Activate characteristic 3
PRON NA60-CB0
<26> Activate characteristic 4
8.3.4.3 Generic functions in control direction
INF Semantics
<240> Read headings of all defined groups
<241> Read values or attributes of all entries in one group
<243> Read directory of a single entry
<244> Read value or attribute of a single entry
<245> General interrogation of generic data
<248> Write entry
<249> Write entry with confirmation
<250> Write entry with execution
<251> Write entry abort
8.3.5 Basic application functions
Test mode
Blocking of monitor direction
Disturbance data
Generic services
Private data
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8.3.6 Miscellaneous
Measurands are transmitted with ASDU 3. As defined in 7.2.6.8, the maximum MVAL can
either be 1,2 or 2,4 times the rated value. No different rating shall be used in ASDU 3, i.e., for
each measurand there is only one choice.
Measurand Max. MVAL = rated value times
1,2 or 2,4
Current L
Current L
Current L
Voltage L
Voltage L
Voltage L
Active power P
1
2
3
1-E
2-E
3-E
Reactive power Q
Frequency f
Voltage L1 - L
2
2 IEC60870-5-103 INTERFACE
The following IEC60870-5-103 facilities are supported by this interface:
1. Initialisation
2. Time Synchronisation
3. Event Record Extraction
4. General Interrogation
5. Cyclic Measurements
6. General Commands
2.1 Physical connection and link layer
Connection is available for IEC60870-5-103 through the rear RS485 port. It is possible to select both the relay
address and baud rate using the front panel interface. Following a change, a reset command is required to reestablish communications.
The parameters of the communication are the following :
• Even Parity
• 8 Data bits
• 1 stop bit
• Data rate 1200, 2400, 4800, 9600, 19200, 38400 or 57600 bauds
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2.2 Initialisation
Whenever the relay has been powered up, or if the communication parameters have been changed a reset
command is required to initialise the communications. The relay will respond to either of the two reset commands
(Reset CU or Reset FCB), the difference being that the Reset CU will clear any unsent messages in the relay's
transmit buffer.
The relay will respond to the reset command with an identification message ASDU 5, the Cause Of Transmission
COT of this response will be either Reset CU or Reset FCB depending on the nature of the reset command.
The following information will be contained in the data section of this ASDU:
Internal Software ID: internal Firmware ID
ASCII ID: Relay model
2.3 Time synchronisation
The relay time and date can be set using the time synchronisation feature of the IEC60870-5-103 protocol. The
relay will correct for the transmission delay as specified in IEC60870-5-103.
2.4 Spontaneous events
The events created by the relay will be passed using the standard function type/information numbers to the
IEC60870-5-103 master station. Private codes are not used, thus any events that cannot be passed using the
standardised messages will not be sent.
Events are categorised using the following information:
• Common Address
• Function Type
• Information number
The common address is used to differentiate in circumstances where the relay produces more events of a certain
type than can be passed using the standardised messages.
For example if the relay produces starts and trips for three stages of overcurrent only two stages can be passed
using the standardised messages.
Using the different common address for two of the overcurrent stages allows each stage to be indicated.
2.5 General interrogation
The GI request can be used to read the status of the relay, the function numbers, information numbers and
common address offsets that will be returned during the GI cycle are indicated in 2.11.
2.6 Cyclic measurements
The relay will produce measured values using ASDU 3 on a cyclical basis, this can be read from the relay using a
Class 2 poll (note ADSU 9 is not used).
It should be noted that the measurands transmitted by the relay are sent as a proportion of either 1.2 or 2.4 times
the rated value of the analogue value. The selection of either 1.2 or 2.4 for a particular value is indicated in 2.11.
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2.7 Commands
A list of the supported commands is contained in 2.11. The relay will respond to other commands with an ASDU 1,
with a cause of transmission (COT) of negative acknowledgement of a command.
2.8 Disturbance records
The relay does not support the exchange of disturbance data through the mechanism defined in the IEC60870-5103 standard.
2.9 Blocking of monitor direction
The relay does not support a facility to block messages in the Monitor direction.
2.10 Acronyms
FUN: Function Type
INF: Information Number
TYPE: Type of ASDU
COT: Cause of Transmission
BIDI: Bidirectional event
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LIST OF FAULTS
DSC
TYP
2.11 List of events produced by the relay
Two kinds of ASDU can be generated for the events :
Type ASDU 1 (time-tagged message)
Type ASDU 2 (Time-tagged message with relative time)