Ormazabal ekor.rci Instruction manual

LIB
ekor.rci
Integrated control unit
General instructions
IG-158-EN, version 09, 15/11/2016

In view of the constant evolution in standards and design, the characteristics of the elements contained in this manual are subject
to change without prior notice. These characteristics, as well as the availability of components, are subject to confirmation by
Ormazabal.
CAUTION!
When medium-voltage equipment is operating, certain components are live, other parts may be in movement and some may
reach high temperatures. Therefore, the use of this equipment poses electrical, mechanical and thermal risks.
In order to ensure an acceptable level of protection for people and property, and in compliance with applicable environmental
recommendations, Ormazabal designs and manufactures its products according to the principle of integrated safety, based on
the following criteria:
• Elimination of hazards wherever possible.
• Where elimination of hazards is neither technically nor economically feasible, appropriate protection functions are
incorporated in the equipment.
• Communication about remaining risks to facilitate the design of operating procedures which prevent such risks,
training for the personnel in charge of the equipment, and the use of suitable personal protective equipment.
• Use of recyclable materials and establishment of procedures for the disposal of equipment and components so
that once the end of their service lives is reached, they are duly processed in accordance, as far as possible, with the
environmental restrictions established by the competent authorities.
Consequently, the equipment to which the present manual refers complies with the requirements of section 11.2 of Standard
IEC 62271-1. It must therefore only be operated by appropriately qualified and supervised personnel, in accordance with the
requirements of standard EN 50110-1 on the safety of electrical installations and standard EN 50110-2 on activities in or near
electrical installations. Personnel must be fully familiar with the instructions and warnings contained in this manual and in other
recommendations of a more general nature which are applicable to the situation according to current legislation[1].
The above must be carefully observed, as the correct and safe operation of this equipment depends not only on its design but also
on general circumstances which are in general beyond the control and responsibility of the manufacturer. More specifically:
• The equipment must be handled and transported appropriately from the factory to the place of installation.
• All intermediate storage should occur in conditions which do not alter or damage the characteristics of the equipment
or its essential components.
• Service conditions must be compatible with the equipment rating.
• The equipment must be operated strictly in accordance with the instructions given in the manual, and the applicable
operating and safety principles must be clearly understood.
• Maintenance should be performed properly, taking into account the actual service and environmental conditions in
the place of installation.
The manufacturer declines all liability for any significant indirect damages resulting from violation of the guarantee, under any
jurisdiction, including loss of income, stoppages and costs resulting from repair or replacement of parts.
Warranty
The manufacturer guarantees this product against any defect in materials and operation during the contractual period. In the
event that defects are detected, the manufacturer may opt either to repair or replace the equipment. Improper handling of this
equipment and its repair by the user shall constitute a violation of the guarantee.
Registered Trademarks and Copyrights
All registered trademarks cited in this document are the property of their respective owners. The intellectual property of this manual
belongs to Ormazabal.
[1] For example, in Spain the “Regulation on technical conditions and guarantees for safety in high-voltage electrical installations” – Royal Decree
337/2014 is obligatory.

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General instructions
ekor.rci
Index
Index
1. General description ...................................................4
1.1. General functional characteristics ............5
1.2. Parts of the ekor.rci unit......................6
1.2.1. Electronic relay ..............................6
1.2.2. Current sensors ..............................7
1.3. Communications and programming
software .....................................8
2. Applications ...............................................................9
2.1. Remote controlled transformer substation....9
2.2. Automatic sectionaliser .....................10
2.3. Automatic transfer . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.4. Detection of a phase with earthing ..........11
2.5. Detection of cable breaks ...................11
2.6. Earthing prevention interlocks ..............11
3. Detection, automation and control functions.......12
3.1. Overcurrent.................................12
3.2. Earth ultrasensitive device...................14
3.3. Presence/absence of voltage ................15
3.4. Fault detection..............................15
3.4.1. Non-directional earth fault indication........16
3.4.2. Directional earth fault indication ............18
3.5. Zero-sequence voltage metering ............19
3.6. Automatic sectionalizer .....................20
3.7. MV monitoring .............................20
3.8. Switch control ..............................21
3.9. Remotecontrol..............................22
4. Metering functions ..................................................23
4.1. Current (I)...................................23
4.2. Voltage (V) .................................23
4.3. Active power (P) ............................23
4.4. Reactive power (Q)..........................23
5. Sensors......................................................................24
5.1. Functional characteristics ...................24
5.2. Vector sum/zero-sequence wiring (current) ...25
5.3. Voltage .....................................26
6. Remote terminal unit (RTU) function.
Medium-voltage monitoring ..................................27
6.1. Medium-voltage monitoring functions ......27
6.2. Hardware characteristics ....................27
6.3. Communication with the dispatching centre.
IEC 60870-5-104 protocol ...................28
6.4. Web server. checking and configuring
parameters .................................28
6.4.1. Access to the web server ....................28
6.4.2. Checking and modifying parameters ........29
6.5. Input and output configuration
of the ekor.rci with remote terminal
unit (RTU) function..........................31
7. Technical characteristics..........................................32
7.1. Rated values ................................32
7.2. Mechanical design ..........................32
7.3. Insulation tests..............................32
7.4. Compatibilidad electromagnética ...........32
7.5. Climatic tests ...............................33
7.6. Mechanical tests ............................33
7.7. Power tests .................................33
7.8. CE conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
8. ekor.rci integrated control unit...............................34
8.1. Configurator ................................35
8.2. Functional description ......................36
8.3. Definition of Inputs/outputs.................37
8.4. Cubicle installation..........................40
8.5. Electrical diagram...........................42
8.6. Installation of toroidal-core current
transformers ................................43
8.6.1. Phase toroidal transformers .................43
8.6.2. Zero-sequence toroidal-core current
transformer.................................44
8.7. Checking and maintenance .................44
8.8. Busbar connection applications .............45
9. Setting and handling menus...................................46
9.1. Keypad and alphanumeric display ...........46
9.2. Display .....................................47
9.3. Parameter setting ...........................49
9.4. Fault recognition............................52
9.5. Menu map (quick access)....................53
10. Communications ......................................................55
10.1. Physical medium: RS485 and optical fibre....55
10.2. MODBUS protocol ..........................55
10.2.1. Read/write functions........................56
10.2.2. Password-protected registrer write ..........57
10.2.3. CRC generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
10.2.4. Register map ...............................58
10.3. PROCOME protocol .........................62
10.3.1. Link level ...................................62
10.3.2. Application level ............................64

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General description General instructions
ekor.rci
1. General description
The automation needs of power distribution networks,
resulting from more stringent supply quality requirements,
have made the use of equipment which can monitor
medium-voltage and control switches in secondary
distributioncubiclesincreasinglynecessaryandwidespread.
The ekor.rci integrated control unit includes MV
monitoring functions:
• Detection:
- Fault detection (directional and non-directional)
- Voltage presence or absence
- Anomalies
• Metering:
- Current (I)
- Voltage (V)
- Active and reactive power (P and Q)
• Alarms, etc.
• The ekor.rci unit is equipped with outputs which allow
the switch of the cubicle where the unit is installed to be
opened and closed both locally and remotely, as well as
with inputs which detect the status of this switch.
The applications that can be implemented with the
ekor.rci integrated control unit include, among others:
automatic disconnection of fault lines, local control,
remote controlled operations, automations, interlocks,
etc., related to present and future automation needs of
transformer and switching substations.
Figure 1.1. Integrated control units: ekor.sys family
It can be used in feeder functions of Ormazabal’s
cgmcosmos and cgm.3 systems.
This ekor.rci integrated control unit has been designed
to meet the requirements of the following standards and
guidelines:
IEC 60255, IEC 61000, IEC 62271-200, IEC 60068, IEC 60044,
IEC 61958
Designed to be integrated in a cubicle, the ekor.rci
integrated control unit also provides the following
advantages over conventional systems:
1. Compact remote terminal unit (RTU) integrated into
cubicle, minimising the need to install control boxes on
the cubicles.
2. Reduction in handling of interconnections when
installing the cubicle. The only connection required is
limited to MV cables.
3. V, P and Q metering without the need for Voltage
Transformers.
4. Voltage and current sensors are installed in the cubicle
cable bushing.
5. Avoidanceofwiringandinstallationerrors;minimisation
of commissioning time.
6. The entire unit is factory installed, adjusted and
checked; each piece of equipment (cubicle + control +
sensors) also undergoes a comprehensive check before
being installed. The nal unit tests are carried out once
the unit is incorporated in the cubicle before delivery.
7. Display of a broad range of overcurrents with the same
model (5 A to 1200 A for phases; 0.5 A to 480 A for
earth). Directional fault detection from values of 0.5 A
upwards.

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General instructions
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General description
1.1. General functional characteristics
All relays of the ekor.rci integrated control unit include
a microprocessor for processing the signals from the
metering sensors. They process the current and voltage
measurements without requiring auxiliary converters, thus
eliminating the inuence of transient phenomena. They
also calculate the necessary magnitudes for the detection
functions, such as overcurrent, presence and absence of
voltage, directional or non-directional fault, etc. In addition,
theecient currentvalues,which providetheinstantaneous
value of these installation parameters, are determined.
Theyareequipped with ascreenandkeypadforlocal display,
setup and operation of the unit, as well as communication
ports to handle these functions from a computer, whether
locally or remotely. A user-friendly design has been
employed, so that the use of the various menus is intuitive.
The current is measured by means of several current sensors
with a high transformation ratio, making it possible for the
same equipment to detect a wide range of current levels.
Voltage is detected by capturing the signal via a capacitor
divider built into the cubicle bushing.
The unit is equipped with an event log which stores the
last two faults detected by ekor.rci. In addition, the total
number of detected faults is saved, as well as the various
setting parameters.
The local interface uses menus to provide the instantaneous
values of the current metering for each phase and zero-
sequence current, as well as the setting parameters of
the fault detection functions, the unit that detected the
fault, voltage detection parameters, etc. These can also be
accessed through the communication ports.
From a maintenance perspective, the unit has a series of
features that reduce the time and the possibility of errors
in the test and service restoration tasks. Among the main
characteristics, the most prominent are the toroidal-core
current transformers installed in the cubicle bushing, their
built-in test contacts for checking purposes and a terminal
block for physically checking the relay inputs and outputs.
Therefore, the unit allows local testing means in addition to
the communication ports.
Figure 1.2. ekor.rci integrated control unit frontal view

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General description General instructions
ekor.rci
1.2. Parts of the ekor.rci unit
The ekor.rci integrated control unit contains the following
parts: electronic relay, voltage and current sensors, terminal
block and wiring.
1Terminal block
3ekor.rci electronic relay
4Voltage and current sensors
5Connection cables
Figure 1.3. Example of installation of an ekor.rci unit in cgmcosmos-l
2Terminal block (inner)
3ekor.rci electronic relay
4Voltage and current sensors
5Connection cables
Figure 1.4. Example of installation of an ekor.rci unit in cgm.3-l
1.2.1. Electronic relay
The electronic relay has keys and a display to set and view
the detection, measurement and control parameters.
Depending on the model, it also allows the switch to
be opened and closed from the front keypad. The relay
includes a seal on the <<SET>> key to ensure that once the
settings have been made they cannot be changed unless
the seal is broken.
Detected faults are registered on the display with the
following parameters: value of the fault, fault direction,
duration of fault or detection time according to parameter
T1, voltage checking time and time and date of the event.
Depending on the model. Consult Ormazabal.
The ‘On’ LED is activated when the equipment receives
power from an external source. In this situation, the unit is
operational to perform the detection, metering and control
functions.
The voltage and current input signals are conditioned
internally by small transformers that isolate the electronic
circuits from the rest of the installation.

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General description
The communication ports on the electronic equipment are
RS232 on the front for local conguration and RS485 on
the rear for remote control. The standard communication
protocols for all models are MODBUS and PROCOME.
1‘On’LED indicator
2Display of measurements and settings
3SET key
4Scroll keys
5RS232 front communication port
6Scroll keys and keys to open/close the switch
Figure 1.5. ekor.rci relay elements
1.2.2. Current sensors
The current sensors are toroidal-core transformers with a
high transformation ratio. Their range of action is the same
as the switchgear where they are installed. They are always
factory-installed in the cubicle bushings, which signicantly
simplies the on-site assembly and connection. In this
way, once the MV cables are connected to the cubicle, the
detection unit is operational.There are no sensor installation
errors, due to earthing grids, polarities, etc. since they are
directly factory installed and tested. See section 8.6
The current sensors have an integrated protection
against the opening of secondary circuits, which prevents
overvoltage.
1Current sensors
2Pasatapas
Figure 1.6. Location of the current sensors

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General description General instructions
ekor.rci
1.3. Communications and programming software
The ekor.rci integrated control unit has two serial
communication ports.The standard RS232 front port is used
to set the parameters with the ekor.soft program[2]. At the
rear, there is an RS485 port which is used for remote control.
This remote control connection can use braided wiring and
optical bre, if desired
The standard communication protocols implemented in
all equipment are MODBUS in RTU remote terminal unit
transmission mode (binary) and PROCOME, although other
specic protocols can be implemented depending on the
application.
1ekor.ccp
2ekor.bus
3ekor.rci
4ekor.rci
5ekor.rpt
6ekor.rpg
Figure 1.7. Intercommunicated units of the ekor.sys family
The ekor.soft setup program has four main operating
modes:
1. Display: indicates the unit status, including electrical
measurements, current settings, date and time.
2. User settings: allows to change the earth fault indicator
and the sectionaliser parameters.
3. Event log: display the parameters of the last and
penultimate detected fault, as well as the total number
of faults detected by the corresponding integrated
control unit.
4. Test mode: allows to generate information on the unit
inputs/outputs, without direct electrical interaction
with the switchgear adjoining terminal block, so that it
can be sent to the dispatching centre without cutting
o the power.
Minimum system requirements for installing and using the
ekor.soft software:
1. Processor: Pentium II
2. RAM: 32 Mb
3. Operating System: MS WINDOWS
4. CD-ROM/DVD
5. RS232 serial port
Figure 1.8. ekor.soft screens
[2] For more information about the ekor.soft program, consult Ormazabal’s IG-155 document.

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General instructions
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Applications
2. Applications
2.1. Remote controlled transformer substation
The ekor.rci integrated control unit makes it possible to
handle remote control applications of the transformer
and switching substations, by implementing the control
and monitoring of each switch through the ekor.rci units
associated with each function
1Power supply
2Communications
3Remote control cabinet + ekor.ccp
Figure 2.1. Remote controlled switching substation
The use of integrated control units and a remote control
terminal allows the user to display and operate each
functional unit remotely.
Figure 2.2. Viewing the stations remotely

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Applications General instructions
ekor.rci
2.2. Automatic sectionaliser
The automatic sectionaliser makes it possible to disconnect
the fault section of a line. The operation of the sectionaliser
is similar to that of the fault detector, supplemented by
automatic opening of the switch once the main circuit
breaker has cleared the fault.
This opening can be done in any of the reclosings that the
main recloser can perform. Therefore, a line fault implies the
tripping of the protection of the transformer or switching
substation and then the rst reclosure attempt. If this is
not successful, the main switch will be tripped again. The
sectionaliser detects this and checks that there is no voltage
by opening the line for the section where it is installed. The
second reclosing manages to feed the line again without
the section where the fault is located.
This operation can be scheduled to be performed after the
second reclosing. Therefore, the second reclosing will not
be successful and the main switch will trip again. When this
occurs, the automatic opening of the corresponding switch
will be ordered.
Figure 2.3. Automatic sectionaliser
2.3. Automatic transfer
The automatic transfer of lines minimises power outages in
loads fed by transformer or switching substations with more
than one incoming line, thereby improving the continuity
of service.
Under normal conditions with voltage present on two
possible incoming lines, the switch selected as preferred
will remain closed and the reserve one will be opened. A
voltage drop in the preferred line will cause the switch of
this line to open and the reserve switch to close afterwards.
Once normality has been re-established in the preferred
line, the inverse cycle is performed, returning the system to
its initial status.
Figure 2.4. Automatic transfer