Service Manual

Type KITZ 103

K-Bus to Optimho Interface Unit
 Service Manual
Type KITZ 103
K-Bus to Optimho Interface Unit

HANDLING OF ELECTRONIC EQUIPMENT

A person's normal movements can easily generate electrostatic potentials 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 of GEC ALSTHOM T&D Protection & Control Limited products are immune to the
relevant levels of electrostatic discharge when housed in their cases. Do not expose them to the risk of
damage by withdrawing modules unnecessarily.
Each module incorporates the highest practicable protection for its semiconductor devices. However, if it
becomes necessary to withdraw a module, the following precautions should be taken to preserve the high
reliability and long life for which the equipment has been designed and manufactured.
1. Before removing a module, ensure that you are at the same electrostatic potential as the equipment by
touching the case.
2. Handle the module by its front-plate, frame, or edges of the printed circuit board.
Avoid touching the electronic components, printed circuit track or connectors.
3. Do not pass the module to any person without first ensuring that you are both at the same electrostatic
potential. Shaking hands achieves equipotential.
4. Place the module on an antistatic surface, or on a conducting surface which is at the same
potential as yourself.
5. Store or transport the module in a conductive bag.
More information on safe working procedures for all electronic equipment can be found in BS5783 and
IEC 147-0F.
If you are making measurements on the internal electronic circuitry of an equipment in service, it is preferable
that you are earthed to the case with a conductive wrist strap.
Wrist straps should have a resistance to ground between 500k – 10M ohms. If a wrist strap is not available,
you should maintain regular contact with the case to prevent the build up of static. Instrumentation which may
be used for making measurements should be earthed to the case whenever possible.
GEC ALSTHOM T&D Protection & Control Limited strongly recommends that detailed investigations on the
electronic circuitry, or modification work, should be carried out in a Special Handling Area such as described
in BS5783 or IEC 147-0F.
 Contents

SAFETY SECTION 6
1. INTRODUCTION 10
2. HANDLING AND INSTALLATION 10
2.1 General considerations 10
2.2. Electrostatic discharge (ESD) 10
2.3. Unpacking 11
2.4. Storage 11
2.5 Setting communication address 11
3. KITZ FEATURES 11
4. CONNECTION 12
4.1 RS232 connection 13
4.2 K-Bus connection 14
5. KITZ 103 OPTION SWITCHES 15
5.1 Option switch settings 15
5.2 Data rate selection 16
5.3 RS232 frame parity 16
6. KITZ LED INDICATIONS 16
7. INTERFACE FUNCTION 18
7.1 Interface modes 18
7.2 General 18
7.3 OPTICOM mode 18
7.4 Propagation delay 18
7.5 Courier mode 19
7.5.1 Menu data table 19
7.6 Courier interface 20
8. TECHNICAL DATA 22
8.1 Ratings – auxiliary supply 22
8.2 Burden – auxiliary supply 22
8.3 Fuse rating 22
Maximum recommended fuse rating is 16A. 22
8.4 Accuracy 22
8.5 Operation indicator 22
8.6 Communication ports 23
8.7 High voltage withstand 23
8.8 Environmental 24
8.9 Mechanical tests 24
8.11 Model number 25

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9. COMMISSIONING 25
9.1 Commissioning preliminaries 25
9.2 Auxiliary supply tests 26
9.3 Settings 27
10. PROBLEM SOLVING 27
10.1 Green supply indication led is off 27
10.2 Fuse blows on power-up (AC version only) 27
10.3 RS232 Rx or Tx led remains on after power-up. 27
10.4 Failure to detect unit on K-Bus 27
10.5 Unit fails to log on to Optimho. 28
10.6 Slow communications response (many retries). 28
APPENDIX I 29
KITZ 103 menu data table. 29
APPENDIX II 31
List of KITZ 103 implementation of Courier commands 31

Page 5
 SAFETY SECTION
This Safety Section should be read before commencing any work on the equipment.

Health and safety

The information in the Safety Section of the product documentation is intended
to ensure that products are properly installed and handled in order to maintain
them in a safe condition. It is assumed that everyone who will be associated
with the equipment will be familiar with the contents of the Safety Section.
Explanation of symbols and labels
The meaning of symbols and labels which may be used on the equipment or in
the product documentation, is given below.

Caution: refer to product documentation Caution: risk of electric shock

Protective/safety *earth terminal

Functional *earth terminal.

Note: this symbol may also be used for a protective/
safety earth terminal if that terminal is part of a
terminal block or sub-assembly eg. power supply.

*Note: The term earth used throughout the product documentation is the direct
equivalent of the North American term ground.

Installing, Commissioning and Servicing

Equipment connections
Personnel undertaking installation, commissioning or servicing work on this
equipment should be aware of the correct working procedures to ensure safety.
The product documentation should be consulted before installing,
commissioning or servicing the equipment.
Terminals exposed during installation, commissioning and maintenance may
present a hazardous voltage unless the equipment is electrically isolated.
If there is unlocked access to the rear of the equipment, care should be taken
by all personnel to avoid electric shock or energy hazards.

Page 6
Before energising the equipment it must be earthed using the protective earth
terminal, or the appropriate termination of the supply plug in the case of plug
connected equipment. Omitting or disconnecting the equipment earth may
cause a safety hazard.
The recommended minimum earth wire size is 2.5 mm2, unless otherwise stated
in the Technical Data section of the product documentation.
Before energising the equipment, the following should be checked:
Voltage rating and polarity;
CT circuit rating and integrity of connections;
Protective fuse rating;
Integrity of earth connection (where applicable)
Equipment operating conditions
The equipment should be operated within the specified electrical and
environmental limits.
Battery replacement
Where internal batteries are fitted they should be replaced with the
recommended type and be installed with the correct polarity, to avoid possible
damage to the equipment.
Insertion of modules and pcb cards
These must not be inserted into or withdrawn from equipment whilst it is
energised, since this may result in damage.
Current transformer circuits
Do not open the secondary circuit of a live CT since the high voltage produced
may be lethal to personnel and could damage insulation.
External resistors
Where external resistors are fitted to relays, these may present a risk of electric
shock or burns, if touched.
Insulation and dielectric strength testing
Insulation testing may leave capacitors charged up to a hazardous voltage.
At the end of each part of the test, the voltage should be gradually reduced to
zero, to discharge capacitors, before the test leads are disconnected.
Insertion and withdrawal of heavy current test plugs
When using a heavy current test plug, CT shorting links must be in place before
insertion or removal, to avoid potentially lethal voltages.
Fibre optic communication
Where fibre optic communication devices are fitted, these should not be viewed
directly. Optical power meters should be used to determine the operation or
signal level of the device.

Page 7
Decommissioning and Disposal
Decommissioning: The auxiliary supply circuit in the relay may include
capacitors across the supply or to earth. To avoid electric
shock or energy hazards, after completely isolating the
supplies to the relay (both poles of any dc supply), the
capacitors should be safely discharged via the external
terminals prior to decommissioning.
Disposal: It is recommended that incineration and disposal to water
courses is avoided. The product should be disposed of in a
safe manner. Any products containing batteries should have
them removed before disposal, taking precautions to avoid
short circuits. Particular regulations within the country of
operation, may apply to the disposal of lithium batteries.

Page 8
Technical Specifications

Protective fuse rating

The recommended maximum rating of the external protective fuse for protective
relays is 16A GEC Red Spot type or equivalent, unless otherwise stated in the
Technical Data section of the product documentation. Specific types of relays
use a maximum rated external protective fuse of 6A GEC Red Spot type or
equivalent, consult GEC ALSTHOM T&D Protection & Control Limited for advice
regarding these products.

Insulation class: IEC 1010-1: 1990/A2: 1995 This equipment requires a

Class I protective (safety) earth
EN 61010-1: 1993/A2: 1995 connection to ensure user
Class I safety.

Installation IEC 1010-1: 1990/A2: 1995 Distribution level, fixed

Category Category III installation. Equipment in
(Overvoltage): EN 61010-1: 1993/A2: 1995 this category is
Category III qualification tested at 5kV
peak, 1.2/50µs, 500Ω,
0.5J, between all supply
circuits and earth and also
between independent
circuits.

Environment: IEC 1010-1: 1990/A2: 1995 Compliance is

Pollution degree 2 demonstrated by reference
EN 61010-1: 1993/A2: 1995 to generic safety standards.
Pollution degree 2

Product safety: 73/23/EEC Compliance with the

European Commission
Low Voltage Directive.
EN 61010-1: 1993/A2: 1995 Compliance is
EN 60950: 1992/A3: 1995 demonstrated by reference
to generic safety standards.

Page 9
Section 1. INTRODUCTION
The K-Bus communication system was developed to allow connection of remote
slave units to a central access point (a master control unit eg. a PC and a KITZ
unit), thus allowing remote control and monitoring functions to be performed
using an appropriate communication language. The system was initially
developed for use in the electrical supply industry at distribution voltage levels,
but can equally be applied to other voltage levels or indeed to other systems
which would benefit from such a communication system.
This document details the KITZ 103 interface unit which provides a K-Bus
interface for the GEC ALSTHOM T&D Protection & Control Optimho relays,
enabling Optimho relays to be combined with K-series relays on the K-Bus
system. It describes the operation and features of the unit in sufficient detail to
allow users to interface this unit.
This guide should be used in conjunction with the Optimho service manual.
The unit provides conversion between the K-Bus/Courier and RS232/Opticom
data formats, enabling communications with the Optimho relay using PC based
Courier Access software and an enhanced/upgraded version of the Opticom
software.

Section 2. HANDLING AND INSTALLATION

2.1 General considerations
2.1.1 Receipt of KITZ units
Although the KITZ 103 interface unit is of a generally robust construction, the unit
requires careful treatment prior to use on site. Upon receipt, the unit should be
examined immediately, to ensure no damage has been sustained in transit.
If damage has been sustained during transit, a claim should be made to the
transport contractor, and a GEC ALSTHOM T&D Protection & Control
representative should be promptly notified.
2.2. Electrostatic discharge (ESD)
The KITZ unit uses components that are sensitive to electrostatic discharges.
The electronic circuits are well protected by the metal case and the internal
components should not be exposed by removal of the top or front of the case.
There are no user setting adjustments within the unit.
A person’s normal movements can easily generate electrostatic potentials 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.
When transporting the unit, care should be taken so that the RS232 port is not
subjected to ESD. Touching the case will ensure you are at the same electrostatic
potential as the unit.
Page 10
 If you are making measurements on the internal electronic circuitry of an
equipment in service, it is preferable that you are earthed to the case with a
conductive wrist strap. Wrist straps should have a resistance to ground between
500k–10M ohms. If a wrist strap is not available, you should maintain regular
contact with the case to prevent a build-up of static. Instrumentation which may
be used for making measurements should be earthed to the case whenever
possible.
More information on safe working procedures for all electronic equipment can
be found in BS 5783 and IEC 147-OF. It is strongly recommended that detailed
investigations on electronic circuitry, or modification work, should be carried out
in a Special Handling Area such as described in the above-mentioned BS and
IEC documents.
2.3. Unpacking
Care must be taken when unpacking and installing the unit to prevent damage.
2.4. Storage
If the KITZ unit is not to be installed immediately upon receipt it should be stored
in a place free from dust and moisture in the original carton.
Where de-humidifier bags have been included in the packing they should be
retained.
The action of the de-humidifier crystals will be impaired if the bag has been
exposed to ambient conditions and may be restored by gently heating the bag
for about an hour, prior to replacing it in the carton.
Dust which collects on a carton may, on subsequent unpacking, find its way into
the unit; in damp conditions the carton and packing may become impregnated
with moisture and the de-humidifier will lose its efficiency.
Storage temperature –25°C to +70°C.
2.5 Setting communication address
The communication address of the unit will be set to 255 when it leaves the
factory. This is the global address of all K-Bus slave units on the network and
requires changing to a unique address in order to operate as a slave device on
K-Bus. This is accomplished using the Courier Access Software or Protection
Access Software & Toolkit. For details of how to change the communication
address of the unit, refer to the section ‘Establishing Network Communication’ of
the appropriate software manual. Note that it will be necessary to enter the serial
number of the unit as part of the installation process.

Section 3. KITZ FEATURES

The main features of the KITZ 103 interface unit are as follows:
Back of panel mounting
Wide range of auxiliary supply inputs.
Interface of K-Bus to Optimho relay
Conversion of K-Bus messages to Opticom format.
Conversion of Opticom data to K-Bus format.
Use of Opticom over the K-Bus communications network
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 When fitted
Section 4.

Typical Typical
K Range K Range
KITZ 101/102
Relay Relay
Auxiliary supply K-Bus/IEC870 Interface
voltage
* 150R Terminals
2 1 54 54
2 TX
3 RX
7 Signal ground 56 56
Screen
1 Protective ground

All points are Screen Link

CONNECTION

internally connected

* 2 off externally mounted resistor

assemblies FT 0113 001 supplied with
K-Bus/IEC870 interface

Page 12
LFZP 100 (Optimho) Relay KITZ 103 K-Bus
Auxiliary supply LFZP 100 (Optimho) Interface
voltage
* 150R
(Rear port) 2 1
2 TX 2
3 RX 3
7 Signal ground 7
Screen
IBM or compatible PC 1 Protective ground 1
(for pin assignment numbers
see Table 1) All points are
internally connected

Figure 1: A typical application diagram: LFZP (Optimho) to K-Bus interface.

4.1 RS232 connection
4.1.1 Recommended cable
A standard serial port interface cable (with the connections listed in Table 1)
should be used. It is essential that the cable screen is earthed at one end to
ensure adequate screening. The connectors should be screw-locked to the
KITZ 103 and the Optimho.
4.1.2 Cable length
The maximum recommended length of cable from the RS232 Communications
port is 2 metres (6 feet) or 2500 pF total cable capacitance.
4.1.3 Data rates
The RS232 port of the KITZ 103 is capable of supporting serial communications
rates of 115,200 bauds, according to the switch settings details of the
KITZ 101/102 user guide (R8521). However, since the maximum operating
baud rate of the Optimho is limited to 4800 bauds, then this is the maximum
speed at which both the KITZ 103 and the Optimho are limited to.
The recommended connection from the KITZ 103 to the Optimho is at the rear
serial port of the Optimho, but it is possible to use the Optimho front serial port,
taking account of the pin connections shown in Table 1.
The following table shows the connections required to interface a KITZ 103 to an
Optimho front and rear serial data port.
Note that the terms “Receive Data” and “Transmit Data” (in Table 1) refer to the
named connector and not to a nominated end.

KITZ 103 Optimho (rear port) Optimho (front port)

25 Pin ‘D’ MALE 25 Pin ‘D’ FEMALE 25 Pin ‘D’ FEMALE
CONNECTOR (DTE) CONNECTOR (DTE) CONNECTOR (DCE)
1 – Protective Ground 1 – Protective Ground 1 – Protective Ground
See note
2 – Transmit Data 2 – Transmit Data 2 – Receive Data
3 – Receive Data 3 – Receive Data 3 – Transmit Data
7 – Signal Common 7 – Signal Common 7 – Signal Ground
Connector Shell to
Cable Screen (see note)

Table 1 KITZ 103/Optimho port inter-connections.

Note: The RS232 cable screen should be connected to earth at one end only, to
prevent earth loops.
Pin 7 (Signal Common) or Pin 1 (Protective Ground) can be used as an
alternative to the Connector Shell.

Page 13
 MODEM CONTROL
The KITZ 103 does not support the use of modems between the Optimho relay
and itself; however, in remote communication systems where modems are
essential, the connection must be established between the PC and the
KITZ 101/102 device, see reference R8521.
4.2 K-Bus connection
4.2.1 Recommended cable
Twisted pair of wires with outer screen, to DEF STANDARD 16-2-2c 16 Strands
of 0.2mm diameter, 40mΩ per metre per core, 171pF per metre (core to core),
288pF per metre (core to screen).
4.2.2 Connection method
K-Bus is a multi-drop standard. The K-Bus cable extends from a KITZ 101/2
interface unit and is daisy-chained from one slave device to the next in a radial
fashion. The total K-Bus cable from the master control unit to the farthest slave
device is known as a spur. No branches may be made from the spur.
Since the KITZ 103 and the Optimho relay together behave as a slave device on
K-Bus, the former should be connected to the K-Bus as a standard K-Series relay,
following the recommendations for cabling.
4.2.3 Cable termination
Four millimetre looped screw termination or fast-on connection (as per MIDOS
standard terminations). The outer screen should be earthed at one point of the
cable only, preferably at the connection to the KITZ unit. The transmission wires
should be terminated using a 150Ω resistor at both extreme ends of the cable.
4.2.4 Cable polarity
Polarisation is not necessary for the 2 twisted wires.
4.2.5 Maximum cable (spur) length
The maximum cable length is 1000m.

Page 14
Section 5. KITZ 103 OPTION SWITCHES

KITZ 103 K-Bus TO OPTIMHO INTERFACE

K-Bus RS 232 OPTIONS

1
Rx Tx Rx Tx
0
01234567

K-Bus No
SW 1 2 Vx V

AUXILIARY SUPPLY
VOLTAGE

Figure 2: KITZ 103 – Front plate layout and rear comnnections.

5.1 Option switch settings

The option switches on the KITZ front plate allow the user to configure the KITZ to
suit the application requirements.
The following table lists the valid KITZ 103 option switch functions.

Switch No. Function

0 to 2 RS232 data rate selection
3 RS232 (10/11 bit) frame format
4 to 7 Not used

Table 2. KITZ 103 valid option switch functions.

A switch function is operational when in the UP position (marked 1). The switch
position at power-up determines which features are enabled (or settings apply).
Any changes made to the switch positions while the supply is present will not
affect the operation.

Page 15
5.2 Data rate selection
The three left-hand switches (switches 0 to 2) control the KITZ 103 RS232 port
data communication rate setting.
The RS232 port is capable of supporting asynchronous serial communication at
the data rates specified in Table 3. The corresponding switch settings are also
shown in the table.

Data Rate Switch 0 Switch 1 Switch 2

1200 Position 0 Position 0 Position 0
2400 Position 1 Position 0 Position 0
4800 Position 0 Position 1 Position 0

Table 3. KITZ 103 RS232 Port data rate selection.

5.3 RS232 frame parity

The fourth switch (switch 3) allows the frame format of the RS232
communications port to be set to the following modes:
Position 0 Asynchronous 11 bit (1 start bit, 8 data bits, 1 parity, 1 stop bit)
Position 1 Asynchronous 10 bit (1 start bit, 8 data bits, no parity, 1 stop bit)
The normal operational mode of the KITZ 103 unit uses the 11 bit frame format.
The use of the 10 bit frame format will result in a less secure communications
protocol.
Note that the data, parity, stop bit pattern of the serial control communication
setting of the Optimho relay must be set correspondingly to either 8, even,
1 or 8, none, 1 respectively.
Notes: It is important to realise that the KITZ 103 arrangement presented in
Figure 1 imposes the following constraints:
The PC and the KITZ 101/102 must be matched to the same baud rate
and data bit frame format, whereas the KITZ 103 and the Optimho relay
must be similarly matched.
Also ensure that the Optimho serial control lines should be set to ‘NOT
IN USE’

Section 6. KITZ LED INDICATIONS

The KITZ unit has five led indications.

The green led indicates that the KITZ 103 unit is in the powered-up state.
The four yellow leds indicate the status of the K-Bus and Optimho
communications.
The Receive K-Bus message led (K-Bus Rx) indicates that a message is being
received on the K-Bus communications port.

Page 16
The Transmit K-Bus message led (K-Bus Tx) indicates that a message is being
transmitted on the K-Bus communications port.
The Receive RS232 message led (Rx) indicates that a character is being received
on the RS232 communications port from the Optimho.
The Transmit RS232 message led (Tx) indicates that a character is being
transmitted on the RS232 communications port to the Optimho.
A detailed description of the led indication operation is shown below.

Indication “On” State “Off” State

Green led Supply present No supply
K-Bus Rx When the first address (1) When the end of message is
character of the K-Bus received (Closing Flag 7Eh).
message is received. (2) When a time-out error occurs.
(3) When disabled (ie. when a
valid RS232 character has
been received on the other
channel).
K-Bus Tx When a K-Bus message is (1) When all message characters
ready for transmission have been transmitted,
(loaded in transmit buffer). including the Closing Flag.
(2) When a time-out error occurs.
RS232 Rx (1) When a character is being After receipt of a character from the
received from the Optimho Optimho.
(2) When permanently on,
it indicates that the KITZ 103
is in an unconfigured state.
RS232 Tx (1) When a character is being After the end of a character
transmitted to the Optimho. transmission to the Optimho.
(2) When permanently on, it
indicates that the KITZ 103
is being configured.

Table 4. KITZ 103 led indications.

Page 17
Section 7. INTERFACE FUNCTION
7.1 Interface modes
The main purpose of the KITZ 103 is to make it possible to use Optimho relay
over the K-Bus network, along with other relays in the K-Series family.
The KITZ 103 interface unit provides in one device the facilities required to open
the communication channels between an Optimho relay and the following
software packages:
● OPTICOM 100 version 5.0/OPTICOM 140 version 3.0
● COURIER BASED APPLICATION SOFTWARE PACKAGES.
7.2 General
The KITZ 103 functions in two stable operating modes: OPTICOM mode and
COURIER MODE. It boots up by default in Courier mode until it receives a
message packet with a distinctive OPTICOM identifier. It stays in OPTICOM
mode until an incoming message packet contains the Courier identifier or the
system is reset.
7.3 OPTICOM mode
The OPTICOM 100 and OPTICOM 140 software packages have been updated
to version 5.0 and version 3.0 respectively, to give them a Courier style message
packaging so that the RS232 serial communication link between the PC and the
KITZ 101/102 can carry data messages compatible to both Opticom and any
Courier based application software.
In this mode, a data link is established between an Optimho relay and a PC
running Opticom. Data is received/transmitted over the RS485 K-Bus and the
RS232 serial port, using the Courier/IEC 870 frame format, but not the full
IEC-870 FT1.2 frame protocol, as the Opticom message protocol is left to deal
with error detection. Opticom messages are brought into compliance with the
Courier protocol by assigning them a unique DTL (Data Type Length) control byte
for identification purposes. On detection of this special DTL, the KITZ 103
extracts the Opticom data message from the Courier data message and passes it
on unaffected to the relay. When the relay sends a reply to the PC, the DTL is
added to form a Courier packet.
In the Opticom mode therefore, the KITZ 103 acts as a simple data messenger
between the PC running Opticom and the Optimho relay, in the same capacity
as the KITZ 101/102 or any intervening modems.
7.4 Propagation delay
Due to the effect of the communication link between the PC running Opticom
and the Optimho relay, a delay is introduced into the communications link.
To compensate for this effect, Opticom requires the user to enter a channel
propagation delay, depending on the different baud rates between the PC and
the Optimho. The following table gives suggested minimum values (in seconds)
for the channel propagation delay setting.

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 PC baud Optimho Opticom Channel
rate baud rate Propagation Delay
9600 4800 1.1
2400 1.2
1200 1.8
4800 4800 1.0
2400 1.2
1200 1.8
2400 2400 1.2
1200 1.8
1200 1200 1.8

7.5 Courier mode

The KITZ 103 not only boots up in Courier mode, but it spends most of its
operating time in that mode, cyclically refreshing its own internal Courier menu
database from the Optimho relay and responding to Courier Access requests as
and when they occur. In this mode, the interface unit effectively acts a Courier
slave device on the K-Bus, receiving Courier commands from the PC and
responding to them as well performing a master function to the Optimho relay.
7.5.1 Menu data table
In the Courier mode, the menu data table represents the interface between the
request/reply messages at the K-Bus side and the Opticom command/response
protocol.
The KITZ 103 does not support the full Courier menu table. The table in
Appendix I shows the list of Optimho data items accessible via Courier and
mapped onto the Courier menu cell format.
7.5.2 System data cells
For more information on the format and purpose of the password, model number,
plant reference and communication level cells within the System Data column,
the Courier User Guide (reference R6512) should be consulted. The model
number string is constructed from a fixed string LFZP and part of the Optimho
relay version number (eg. “111“).
7.5.3 Unit software cell
This cell contains the software version of the interface unit. It is presented as a
fixed 16 character string.
7.5.4 Log on status cell
On powering up the KITZ 103/Optimho system, the interface unit will
automatically attempt to log on the relay, using by default, the identifier it
already holds. This cell contains the communication status of the LFZP relay

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 (ie. Logged on/Logged of); however, the cell contents can be changed from the
Courier Access Software package . As a result of this manual change, the
interface unit will carry out the appropriate logging action, updating the cell
status if the communication link fails.
7.5.5 K-BUS address
The interface unit requires a unique address in order to operate as a slave device
on the K-Bus. The address format is defined in the K-Bus Interface Guide
(Reference R6509).
7.6 Courier interface
The KITZ 103 unit is responsible for responding to the commands issued by the
Courier Access Software and operates effectively as a K-Bus slave device.
It complies with the rules of the Courier protocol. Appendix II lists the Courier
commands supported by the interface unit and those not supported. The Courier
commands are detailed in R6512, and the user should refer to the Protection
Access Software & Toolkit manual (R8514) for more information on Courier
applications.
7.6.1 Logging on
Before remote communications can be established with the Optimho relay, the
unit must log-on to the Optimho, involving the transmission of the user identifier.
The unit contains a user identifier setting which is saved in non-volatile memory.
Note that the user identifier in the unit must be set to the Optimho group 1 user
identifier in order to log-on. If the unit is connected to the Optimho front port a
user identifier of TESTONLY can be used. The KITZ 103 unit automatically
initiates the log-on procedure on detection of the ‘Reset Remote Link’ Courier
command from the Access software.
Once logged on, the interface unit remains logged on with the message “Serial
Comms Logged On” displayed on the relay lcd unit, blocking off any local user
access.
7.6.2 Logged off
The Logoff procedure is initiated by the interface unit when the value of the
Log-on status cell is manually changed to “LOGGED OFF”. Whilst operating in
Courier mode, the KITZ 103 automatically logs off the Optimho relay on receipt
of a data packet from the Opticom software package.
7.6.3 Updating cell values
The interface unit constantly updates the contents of the menu data cells.
The cells are categorised as fixed and dynamic cells:
the contents of fixed cells such as the identification string, are uploaded, when
the communication link is first established between the Access Software and the
Optimho
the contents of the dynamic cells, on the other hand, such as those with metering
or fault record information, are refreshed on a cyclical basis or on receipt of a
request from the Access Software.

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7.6.4 Request for metering information
Any requests for metering information from the Courier Access Software are
acted upon immediately. Cells with metering information are updated from the
Optimho on a cyclic basis, independently of any requests. The turnaround time
for metering information is therefore dependent on the transmission rate between
the interface unit and the Optimho and also on the time taken by the latter to
prepare and despatch the required cyclic information.
7.6.5 Request for fault record information
Within the Courier Fault Record Column, an additional setting cell is allocated to
designate the number of the fault record to be retrieved. The value of this cell is
set by default to 1. The process of updating fault record cell values is started
when a valid record number is entered.
Cells containing fault record data become immediately available.
After a successful “log - on” procedure, the interface unit maintains a continuous
scan of the relay’s fault record pointer; on detecting a fault, it uploads the
appropriate fault record values.
7.6.6 Changing settings group
A menu data table cell is provided to enable the active settings group to be
changed.
7.6.7 Communications failure
If the communication link between the KITZ 103 and the Optimho fails whilst the
former is operating in Courier mode, it will automatically update the value of the
logon status cell. It will stop polling for measurements values and will return to the
Access Software the error code ERR_NODATA in response.
All error code replies are defined in the Courier User Guide R6512.
7.6.8 Event Records
The KITZ 103 will automatically generate a Courier event record when it detects
and extracts a fault record from an Optimho. The time tag of the event record is
created using the time of the extracted fault record. The text message of the event
is the fault record description, as displayed on the relay. The distance fault
record value is the binary representation of the distance fault record (format as
defined in company document: ‘Optimho Serial Communications’ Section 9.4.3).
The format of the (type 0) event record is as follows:

Packet DTL Data Description

#
1 46h 00 01 Menu cell reference (0100)
2 37h + 7 xx xx xx xx xx xx xx IEC Time tag
3 18h + “Z1Y DELAY AB” ASCII text message – 33 characters
21h
4 26h yy zz Distance fault record value
yy - 1st byte (fields 1 & 2)
zz - 2nd byte (fields 3, 4 & 5)

Page 21
7.6.9 Issue KITZ 103B software
Two additional menu cells have been created:
Menu cell (0403) containing the KITZ 103-Optimho link status in the format of an
unsigned integer (0 = logged off/1 = logged on).
Menu cell (0404) which disables/enables the unit from generating Courier event
records when the KITZ 103-Optimho link status changes.
The format of the (type 0) event record created when the KITZ103-Optimho link
status changes is as follows:

Packet
DTL Data Description
#
1 46h 03 04 Menu cell reference (0403)
2 37h + 7 00 00 80 00 00 00 00 IEC Time tag (IV = Invalid value)
3 18h + “Logged on” ASCII text message – 10 characters
0Ah (“Logged off”/“Logged on”)
4 26h 01 00 Link status value (0/1)

Note that the IEC time tag contains a fixed value of 0 (with the invalid (IV) bit
set), as the real time value of the event is unknown.

Section 8. TECHNICAL DATA

8.1 Ratings – auxiliary supply

Auxiliary supply Nominal (V) Operative Range (V)

24/125V ac/dc 19 – 150V dc
50 – 133V ac 50/60 Hz
48/250V ac/dc 33 – 300V dc
87 – 265V ac 50/60 Hz

8.2 Burden – auxiliary supply

KITZ 103 (ac) <5VA
(dc) <3W
8.3 Fuse rating
Maximum recommended fuse rating is 16A.
8.4 Accuracy
8.4.1 Software communication timers
K-Bus data receive character gap timer: 33 bits +2.0/–0ms
K-Bus data transmit maximum transmit time: 500 ms +0/–1.0ms
8.5 Operation indicator
5 light emitting diodes – internally powered.

Page 22
8.6 Communication ports
8.6.1 K-Bus port
Language: COURIER
Transmission: Synchronous – RS485 voltage
levels
Transmission Coding: FM0 Biphase Space
(Differential Manchester)
Frame Format: HDLC
Baud Rate: 64k/bit per second
K-Bus Cable: Screened twisted pair
K-Bus cable length: 1000m of cable (maximum)
K-Bus Loading: 32 units (multi-drop system)
Isolation: 2kV rms for one minute
Voltage signals
(Based on RS485 differential voltage level):
Unloaded driver differential output: ±5V
Receiver input sensitivity: ±200mV
8.6.2 RS232 port
Language: OPTICOM FORMAT
Transmission: Asynchronous – RS232 voltage
levels
Transmission coding: NRZ
Frame format (switch 3 = position 0): Asynchronous – 11 bit
(1 start bit, 8 data bits,
1 parity (even) 1 stop bit)
Frame format (switch 3 = position 1): Asynchronous – 10 bit
(1 start bit, 8 data bits, no parity,
1 stop bit)
Baud rate: 1200 to 4800 bits per second
RS232 cable: RS232 serial interface lead
RS232 cable length: 15m of cable (maximum)
(or 2500pF total cable
capacitance)
RS232 Loading: 2 units (point to point system)
8.7 High voltage withstand
The high voltage withstand tests can be performed on the following
independent circuits:
Auxiliary supply
K-Bus communication port

Page 23
 The RS232 port is earthed locally and should not be tested for high voltage
withstand. It is protected by the cable screen.
8.7.1 Dielectric test (Insulation) IEC 255-5, BS 5992-3
2.0kV rms for one minute between all terminals wired together and case earth.
2.0kV rms for one minute between terminals of independent circuits.
8.7.2 High voltage impulse IEC255-5, BS 5992-3
5kV peak, 1.2/50µs, 0.5J between all terminals of independent circuits and
terminals of independent circuits to case earth.
0kV peak on IEC-870 port
8.7.3 High frequency disturbance IEC255-22-1, BS 142-1.4.1
Class III 2.5kV peak between independent circuits and independent
circuits to case.
Class III 1.0kV between terminals of same circuit
0kV peak on RS232 port
8.7.4 Electrical fast transient IEC255-22-4, BS 142-1.4.4, IEC 801-4
Auxiliary supply Class III 2kV
K-Bus communication port Class III 2 kV - capacitive coupling
RS232 Port None
8.7.5 Electrostatic discharge IEC 255-22-2, IEC 801-2
Class II 4kV - point contact discharge.
Note: The RS232 port will not withstand electrostatic discharges (air or contact).
8.8 Environmental
8.8.1 Temperature IEC 68-2-1, BS 2011 Part 2.1A & IEC 68-2-2, BS 2011 Part 2.1B
Storage and transit: –25°C to +70°C
Operating: –25°C to +55°C
8.8.2 Humidity IEC68-2-3, BS 2011 Part 2.1 Ca
56 days at 93% relative humidity and 40°C
8.8.3 Enclosure Protection – IP20 (IEC529)
8.9 Mechanical tests
8.9.1 Vibration IEC 255-21-1 Class I
8.9.2 Shock and bump IEC 255-21-2 Class I
8.9.3 Seismic IEC 255-21-3 Class I.
8.10 Battery
A battery is no longer fitted to current production models of the KITZ 103. For
older models fitted with a battery consult with GEC ALSTHOM T&D Protection
and Control Limited for advice on battery replacement/disposal.

Page 24
8.11 Model number

Section 9. COMMISSIONING
9.1 Commissioning preliminaries
The KITZ 103 unit should be commissioned in conjunction with the both the
K Range Protection Access Software & Toolkit and Opticom Software (running on
a PC), a KITZ 101/102 and an Optimho relay.
See R8514 Protection Access Software & Toolkit or publication R8515 Courier
Access Software which are provided with the software and the OPTICOM
package (R5928 Opticom 100 version 5.0 or later/Opticom 140 version 3.0
or later).
9.1.1 Module connection
Reference should be made to Section 3 of this manual and to the user manual of
the computer (PC) on which the Protection Access Software & Toolkit is to be run.
9.1.2 Electrostatic discharge (ESD)
See recommendations in Section 2 of this user manual before handling the
module.
9.1.3 Inspection
Carefully examine the unit and case to see that no damage has occurred since
installation.
9.1.4 Earthing
9.1.4.1 Mains earthing
The KITZ103 unit must be earthed.
Page 25
 If the mains supply has no earth connection, the KITZ103 interface unit earthing
connection on the rear of the case must be used to connect the unit to a local
(mains) earth.
9.1.4.2 K-Bus earthing
The K-Bus cable screen should only be connected to earth at one point in the
communication system. This will normally involve connecting the cable at the
master station end to the KITZ101/2 interface unit earth connection and not at
any other point.
9.1.5 Insulation
Insulation tests only need to be done when required.
Isolate all wiring from the earth and test the insulation with an electronic or
brushless insulation tester at a dc voltage not exceeding 1000V.
Terminals of the same circuits should be temporarily strapped together.
The main groups on the relays are given below:
Auxiliary voltage supply
K-Bus Communication port
Case earth
This test should not be performed on the Optimho(RS232) communications port.
9.1.6 Equipment required
The KITZ units require the following:
AC voltmeter 0 – 300V
DC voltmeter 0 – 200V
A portable PC, with Protection Access Software & Toolkit, a KITZ 101/102 and
a LFZP Optimho relay are essential for commissioning the KITZ 103
K-Bus/Optimho interface unit.
9.2 Auxiliary supply tests
The unit will operate from either a 24/125V dc auxiliary supply or a
110V/120V ac auxiliary supply, but it is essentially a battery operated device.
Since the unit will accept both ac and dc supplies from the same input
connections then the polarities are immaterial.
The incoming voltage must be within the operating range specified in Table 5.

Nominal Operative
KITZ 103
110/120V ac 99 – 138V ac 50/60Hz
24/125V dc 19 – 150V dc

Table 5: KITZ auxiliary supply rating.

Page 26
 The green supply indication should be on when the auxiliary supply voltage is
greater than the minimum specified level.
9.3 Settings
When the KITZ interface unit is used to allow a PC (running Courier Access
software) to communicate with K Range relays (ie. normal operation),
the following applies:
Check baud rate (option switches 0 – 2) setting on the RS232 port corresponds
to the data communication rate of the Optimho. The standard setting is 4800 bps
and the following option switch positions apply:
Option switch 0 is set to 0 (down)
Option switch 1 is set to 1 (up)
Option switch 2 is set to 0 (down)
Option switch 3 (RS232 frame format) should be set to the 0 (down) position for
11 bits
Option Switch 4 to 7should be left in the down position (not used).
The option switch settings are applied at power-up.
If changes are made to the settings, the auxiliary supply must be switched off.
The unit should not be re-energised before at least 5 seconds.

Section 10. PROBLEM SOLVING

Common operational faults are listed in this section. The solutions offered are for
guidance only.
10.1 Green supply indication led is off
Check correct auxiliary supply is present (no supply or 110/120V applied to a
220/240V version).
Check fuse.
10.2 Fuse blows on power-up (AC version only)
Check that excesive auxiliary supply voltage is not being used (220/240V
applied to 110/120V version)
10.3 RS232 Rx or Tx led remains on after power-up.
Unit not configured - return unit to factory for configuration.
10.4 Failure to detect unit on K-Bus
Check K-Bus connection details (see Figure 1).
Check KITZ 101/102 setting/connection details.
Check/set unit K-Bus address (1-254).
Check Master Station is polling.

Page 27
10.5 Unit fails to log on to Optimho.
Check RS232 connection details as in Table 1.
Check user identifier setting in unit matches group 1 user identifier in Optimho.
Check unit and Optimho communication settings are matched (baud rate and
frame format).
Check Optimho communication port set correctly (local/remote).
10.6 Slow communications response (many retries).
No termination resistor fitted to K-Bus, or incorrect value.

216.0

205.0
179.0

AUXILIARY SUPPLY
VOLTAGE
181.0

V
174.0 163.0

No
Vx 2
K-Bus
1
SCN

4 (Typ)
4 off mounting lugs

57.5

Figure 3: Outline drawing for KITZ 103

Page 28
APPENDIX I
KITZ 103 menu data table.
Column 00 Relay Type LFZP
Row Item Format Type Description
00 SYSTEM DATA
02 SYS Password ASCII string PWP Password
04 SYS Description ASCII string PWP Relay description string
05 SYS Plant Ref. ASCII string PWP Plant reference string
06 SYS Model No. ASCII string READ Model number string
08 SYS Serial No. ASCII string READ Serial number string
0A SYS Comms Level Unsigned integer READ Communications level
0B SYS Rly Address Unsigned integer SET Remote communications address
11 SYS Software Ref ASCII string READ Unit software reference string
12* SYS Distance s/w ASCII string READ Distance software version
13* SYS Flt Loc s/w ASCII string READ Fault locator software version

Column 01 Relay Type LFZP

Row Item Format Type Description
00 FAULT RECORDS
01* FLT Record No Index string SET Fault record number
02* FLT Fault Desc1 ASCII string READ Description of fault (top line)
03* FLT Fault Desc2 ASCII string READ Description of fault (bottom line)
04* FLT Time/Date ASCII string READ Time and date of fault
05** FLT Location ASCII string READ Location of fault
06** FLT Location ASCII string READ Location of fault in ohms
(LFZP 14x versions only)
07** FLT Duration ASCII string READ Duration of fault
08** FLT Pre-flt Va ASCII string READ A-phase pre-fault voltage
09** FLT Pre-flt Vb ASCII string READ B-phase pre-fault voltage
0A** FLT Pre-flt Vc ASCII string READ C-phase pre-fault voltage
0B** FLT Pre-flt Ia ASCII string READ A-phase pre-fault current
0C** FLT Pre-flt Ib ASCII string READ B-phase pre-fault current
0D** FLT Pre-flt Ic ASCII string READ C-phase pre-fault current
0E** FLT Fault Va ASCII string READ A-phase fault voltage
0F** FLT Fault Vb ASCII string READ B-phase fault voltage
10** FLT Fault Vc ASCII string READ C-phase fault voltage
11** FLT Fault V0 ASCII string READ Zero sequence fault voltage
12** FLT Fault V2 ASCII string READ Negative sequence fault voltage
13** FLT Fault Ia ASCII string READ A-phase fault current
14** FLT Fault Ib ASCII string READ B-phase fault current
15** FLT Fault Ic ASCII string READ C-phase fault current
16** FLT Fault I0 ASCII string READ Zero sequence fault current
17** FLT Fault I2 ASCII string READ Negative sequence fault current
18** FLT Fault Im ASCII string READ Mutual fault current

Page 29
 Column 02 Relay Type LFZP
Row Item Format Type Description
00 METERING
01** MET Va ASCII string READ A-phase voltage
02** MET Vb ASCII string READ B-phase voltage
03** MET Vc ASCII string READ C-phase voltage
04** MET Ia ASCII string READ A-phase current
05** MET Ib ASCII string READ B-phase current
06** MET Ic ASCII string READ C-phase current
07** MET P real ASCII string READ Real power
08** MET P reac ASCII string READ Reactive power

Column 03 Relay Type LFZP

Row Item Format Type Description
00 RELAY SETTINGS
01* RLY Settings Grp Unsigned integer SET Relay settings group (1- 8)
02* RLY Relay Type ASCII string READ Relay type description
03* RLY Access Level Index string READ Access level (Full/Limited)

Column 04 Relay Type LFZP

Row Item Format Type Description
00 UNIT SETTINGS
01 UNT Logon Status Index string SET Comms logon status
(Logged On/Logged Off)
02 UNT User Identifier ASCII string SET Optimho User Identifier (Group1)
03 UNT Link Status Unsigned Integer READ KITZ103-Optimho Link status (0/1)
04 UNT Lnk Stat Events Index string SET Link status events (Disable/Enable)

Cell types:
PWP – Password protected settings cell
READ – Read only cell
SET – Settings cell
*/** Menu cells only available when KITZ 103 interface unit is logged on to an LFZP relay.
** Menu cells only available on LFZP relay versions with fault locator fitted.

Page 30
APPENDIX II
List of KITZ 103 implementation of Courier commands

UNSUPPORTED COURIER
COMMANDS SUPPORTED COURIER COMMANDS
GET DEVICE LIST POLL BUFFER
RESET TRIP INDICATION POLL STATUS
LDU GET DISPLAY RESET REMOTE LINK
LDU LOG OFF SEND EVENT
LDU LOG ON ACCEPT EVENT
LDU SEND KEY PRESS CHANGE DEVICE ADDRESS
LOAD SHED BY GROUP GET COLUMN HEADINGS
LOAD SHED TO LEVEL GET COLUMN TEXT
SELECT SETTING GROUP GET COLUMN VALUES
ENTER CALIBRATION MODE GET DISPLAY
EXIT CALIBRATION MODE GET STRINGS
GET TEXT
GET VALUE
ENTER SETTING MODE
PRELOAD SETTING
ABORT SETTING
EXECUTE SETTING
RESET MENU CELL
SEND BLOCK
ENTER CONFIGURATION MODE
EXIT CONFIGURATION MODE

Page 31
 GEC ALSTHOM T&D PROTECTION & CONTROL LIMITED
St Leonards Works, Stafford ST17 4LX, England
Tel: 44 (0) 1785 223251 Telex: 36240 Fax: 44 (0) 1785 212232

GEC ALSTHOM T&D PROTECTION & CONTROLE

Avenue de Figuières - 34975 Lattes Cedex - France
Tél: (33) 4 67 20 54 54 Télex: 485 093 F Fax: (33) 4 67 20 54 99
Email: enquiries@pcs.gecalsthom.co.uk – Internet: www.gecalsthomgpc.co.uk
Our policy is one of continuous product development and the right is reserved to supply equipment which may vary from that described.
©1997 GEC ALSTHOM T&D Protection & Control Limited.

Publication R8532D Printed in England.