Circutor Computer SMART III 6 User manual

INSTRUCTION MANUAL
(M015B01-03-21A)
REACTIVE ENERGY REGULATOR
Computer SMART III

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Computer SMART III
Instruction Manual

SAFETY PRECAUTIONS
DISCLAIMER
CIRCUTOR, SA reserves the right to make modifications to the device or the unit specifications set
out in this instruction manual without prior notice.
CIRCUTOR, SA on its web site, supplies its customers with the latest versions of the device specifica-
tions and the most updated manuals.
www.circutor.com
CIRCUTOR, recommends using the original cables and accessories that are supplied
with the device.
DANGER
Warns of a risk, which could result in personal injury or material damage.
ATTENTION
Indicates that special attention should be paid to a specific point.
Follow the warnings described in this manual with the symbols shown below.
If you must handle the unit for its installation, start-up or maintenance, the following should be
taken into consideration:
Incorrect handling or installation of the unit may result in injury to personnel as well as damage to the
unit. In particular, handling with voltages applied may result in electric shock, which may cause death
or serious injury to personnel. Defective installation or maintenance may also lead to the risk of fire.
Read the manual carefully prior to connecting the unit. Follow all installation and maintenance in-
structions throughout the unit’s working life. Pay special attention to the installation standards of the
National Electrical Code.
Refer to the instruction manual before using the unit
In this manual, if the instructions marked with this symbol are not respected or carried out correctly, it can result
in injury or damage to the unit and/or installations.
CIRCUTOR, SA reserves the right to modify features or the product manual without prior notification.
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Instruction Manual
Computer SMART III

CONTENTS
SAFETY PRECAUTIONS .........................................................................................................................................................3
DISCLAIMER ..........................................................................................................................................................................3
CONTENTS.............................................................................................................................................................................4
REVISION LOG .......................................................................................................................................................................6
SYMBOLS...............................................................................................................................................................................6
1. VERIFICATION UPON RECEPTION....................................................................................................................................7
2. PRODUCT DESCRIPTION .................................................................................................................................................7
3. DEVICE INSTALLATION....................................................................................................................................................9
3.1.- PRIOR RECOMMENDATIONS ....................................................................................................................................9
3.2.- RECOMMENDATIONS FOR USING THE COMPUTER SMART III REGULATOR IN MEDIUM-VOLTAGE AUTOMATIC
CAPACITOR BANKS............................................................................................................................................................9
3.3.- INSTALLATION .......................................................................................................................................................10
3.4.- DEVICE TERMINALS............................................................................................................................................... 12
3.5.- CONNECTION DIAGRAM......................................................................................................................................... 13
3.5.1.- 3 VOLTAGES + NEUTRAL AND 3 CURRENTS, COMPUTER SMART III 6 MODEL............................................. 13
3.5.2. 3 VOLTAGES + NEUTRAL AND 3 CURRENTS, COMPUTER SMART III 12 MODEL........................................... 14
3.5.3. 3 VOLTAGES + NEUTRAL AND 3 CURRENTS, COMPUTER SMART III 14 MODEL........................................... 15
3.5.4. 3 VOLTAGES + NEUTRAL AND 1 CURRENT, COMPUTER SMART III 6 MODEL ............................................... 16
3.5.5. 3 VOLTAGES + NEUTRAL AND 1 CURRENT, COMPUTER SMART III 12 MODEL.............................................. 17
3.5.6. 3 VOLTAGES + NEUTRAL AND 1 CURRENT, COMPUTER SMART III 14 MODEL..............................................18
3.5.7. 2 VOLTAGES AND 1 CURRENT, COMPUTER SMART III 6 MODEL.................................................................... 19
3.5.8. 2 VOLTAGES AND 1 CURRENT, COMPUTER SMART III 12 MODEL................................................................. 20
3.5.9. 2 VOLTAGES AND 1 CURRENT, COMPUTER SMART III 14 MODEL.................................................................. 21
3.5.10. LEAKAGE CURRENT CONNECTION, I..........................................................................................................22
3.6.- STARTING UP THE DEVICE ....................................................................................................................................23
4. OPERATION ...................................................................................................................................................................24
4.1.- DEFINITIONS..........................................................................................................................................................25
4.1.1. FOURQUADRANT REGULATOR ........................................................................................................................25
4.1.2. STAGES AND STEPS..........................................................................................................................................25
4.1.3. FCP SYSTEM FAST COMPUTERIZED PROGRAM ............................................................................................25
4.1.4. REGULATION PROGRAM ...................................................................................................................................25
4.1.5. PLUG AND PLAY................................................................................................................................................26
4.1.6. CONNECTION TIME TON AND RECLOSING TIME TREC................................................................................26
4.1.7.THD AND HARMONICS.......................................................................................................................................26
4.2.- MEASUREMENT PARAMETERS..............................................................................................................................27
4.2.1. Connection type: 3U.3C....................................................................................................................................27
4.2.2. Connection type: 3U.1C ...................................................................................................................................28
4.2.3. Connection type: 2U.1C ...................................................................................................................................29
4.3.- KEYBOARD FUNCTIONS........................................................................................................................................ 30
4.4.- DISPLAY .................................................................................................................................................................32
4.4.1. STATUS OF THE CAPACITORS ............................................................................................................................33
4.4.2. STATUS OF THE DEVICE....................................................................................................................................33
4.4.3. ANALOGUE BAR................................................................................................................................................34
4.4.4. OTHER SYMBOLS OF THE DISPLAY...................................................................................................................34
4.5.- LED INDICATORS....................................................................................................................................................35
4.6.- OPERATING STATES...............................................................................................................................................36
4.6.1. MEASUREMENT STATUS ...................................................................................................................................36
4.6.2. TEST STATUS ....................................................................................................................................................55
4.7.- INPUTS.................................................................................................................................................................. 58
4.8.- OUTPUTS.............................................................................................................................................................. 58
4.9.- COMMUNICATIONS ................................................................................................................................................59
4.9.1. CONNECTIONS...................................................................................................................................................59
4.9.2. PROTOCOL ....................................................................................................................................................... 60
4.9.3. MODBUS MEMORY MAP ................................................................................................................................... 61
4.9.4. EXAMPLE OF A MODBUS QUERY......................................................................................................................70
5. CONFIGURATION ........................................................................................................................................................... 71
5.1.- PLUG&PLAY ...........................................................................................................................................................72
5.2.- CURRENT TRANSFORMATION RATIO.....................................................................................................................75
5.3.- TARGET COS φ.......................................................................................................................................................76
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5.4.- CONNECTION AND RECLOSING TIME.....................................................................................................................77
5.5.- CONNECTION TYPE................................................................................................................................................78
5.6.- PHASE CONNECTION.............................................................................................................................................78
5.7.- NO. OF STAGES...................................................................................................................................................... 80
5.8.- PROGRAM..............................................................................................................................................................81
5.9.- C/K FACTOR ..........................................................................................................................................................82
5.10.- VOLTAGE LEVEL ...................................................................................................................................................84
5.11.- EXPERT SETUP.................................................................................................................................................... 85
5.12.- VOLTAGE TRANSFORMATION RATIO.................................................................................................................... 86
5.13.- HYSTERESIS.........................................................................................................................................................87
5.14.- STATUS OF THE STAGES...................................................................................................................................... 88
5.15.- DISPLAY .............................................................................................................................................................. 89
5.16.- ANALOGUE BAR.................................................................................................................................................. 90
5.17.- FAN...................................................................................................................................................................... 90
5.18.- UNDERVOLTAGE TRIP........................................................................................................................................... 91
5.19.- COMMUNICATIONS ..............................................................................................................................................93
5.20.- CLEAR..................................................................................................................................................................94
5.21.- ENABLING ALARMS .............................................................................................................................................95
5.22.- VOLTAGE ALARMS .............................................................................................................................................. 96
5.23.- COS φLOW ALARM.............................................................................................................................................97
5.24.- COS φHIGH ALARM ........................................................................................................................................... 98
5.25.- VOLTAGE THD ALARM......................................................................................................................................... 99
5.26.- CURRENT x I THD ALARM .................................................................................................................................100
5.27.- TEMPERATURE ALARM......................................................................................................................................102
5.28.- LEAKAGE CURRENT ALARM..............................................................................................................................103
5.29.- NO. OF OPERATIONS ALARM.............................................................................................................................104
5.30.- SIMULATION SCREEN........................................................................................................................................105
6. TECHNICAL FEATURES................................................................................................................................................106
7. MAINTENANCE AND TECHNICAL SERVICE..................................................................................................................109
8. WARRANTY..................................................................................................................................................................109
9. CE CERTIFICATE .......................................................................................................................................................... 110
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REVISION LOG
Table 1: Revision log.
Date Revision Description
05/14 M015B01-03-14A Initial Version
03/15 M015B01-03-15A Modification in sections:
3.5.- 4.2.- 4.3. - 4.9.- 9
04/16 M015B01-03-15B
Modification in sections:
2 - 3.4.- 3.5.- 4.4. - 4.4.1.- 4.6.1.1.- 4.6.1.2.- 4.6.1.3.-
4.8.- 4.9.3.- 5.7.- 5.13.- 6.
03/18 M015B01-03-18A Modification in sections:
4.9.3.- 5.14.- 9.
06/18 M015B01-03-18B Modification in sections:
4.9.3.
01/20 M015B01-03-20A Modification in sections:
2.- 4.4.- 4.5. - 4.9.3.- 5.14.
05/20 M015B01-03-20B Modification in sections:
4.9.3.- 5.17.
01/21 M015B01-03-21A Modification in sections:
4.6.1.- 4.9.3.- 5.3. - 5.13.- 5.23.- 5.24.
Note: Devices images are for illustrative purposes only and may differ from the actual device.
SYMBOLS
Table 2: Symbols
Symbol Description
In compliance with the relevant European directive.
Device covered by European directive 2012/19/EC. At the end of its useful life, do not
leave the unit in a household waste container. Follow local regulations on electronic
equipment recycling.
DC current
~AC current
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Computer SMART III
Instruction Manual

1.- VERIFICATION UPON RECEPTION
Check the following points upon receiving the device:
a) The device meets the specifications described in your order.
b) The device has not suffered any damage during transport.
c) Check the features shown on the label of the device to make sure that they are suitable for the
type of power grid to which the device will be connected. (Voltage and power supply frequency,
measurement range, etc.)
d) Perform an external visual inspection of the device prior to switching it on.
e) Check that it has been delivered with the following:
- An installation guide,
- Four retainers for rear attachment of the device,
If any problems are detected upon reception, immediately contact the transport
company and/or the CIRCUTOR S.A. after-sales service.
2.- PRODUCT DESCRIPTION
The Computer SMART III reactive energy regulator is a device that measures the power grid cosine and
controls capacitor connection and disconnection in order to correct it. It also calculates and displays the
main electrical parameters of balanced or unbalanced single-phase and three-phase networks. The
measurement is taken in RMS, via four AC voltage inputs and three current inputs.
There are 3 versions of the device, according to the number of output relays:
Computer SMART III 6, with six output relays.
Computer SMART III 12, with twelve output relays.
Computer SMART III 14, with fourteen output relays.
The device features:
- 5 keys that can be used to browse the various screens and program the device.
- 4 indicator LEDs: CPU, ALARM, FAN and Key PRESSED.
- LCD display: amber backlit, 70x60.7-mm display for viewing all the parameters.
- 2 digital inputs: for selecting the target cosine (4 target cosines).
- 2 digital outputs and 1 relay output: completely programmable as alarms.
- 1 relay output, specific for the fan.
-6 output relays (Computer SMART III 6 model) ,12 output relays (Computer SMART III 12
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model) or 14 output relays (Computer SMART III 14 model) for regulating the cos φby means
of capacitors.
- RS-485 communications, MODBUS RTU©.
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3.- DEVICE INSTALLATION
3.1.- PRIOR RECOMMENDATIONS
In order to use the device safely, it is critical that individuals who handle it follow the
safety measures set out in the standards of the country where it is being used, use the
necessary personal protective equipment, and pay attention to the various warnings
indicated in this instruction manual.
The Computer SMART III device must be installed by authorised and qualified staff.
The power supply plug must be disconnected and measuring systems switched off before handling, al-
tering the connections or replacing the device. It is dangerous to handle the device while it is powered.
Also, it is critical to keep the cables in perfect condition in order to avoid accidents, personal injury and
damage to installations.
The manufacturer of the device is not responsible for any damage resulting from failure by the user
or installer to heed the warnings and/or recommendations set out in this manual, nor for damage
resulting from the use of non-original products or accessories or those made by other manufacturers.
If an anomaly or malfunction is detected in the device, do not use it to take any measurements.
Inspect the work area before taking any measurements. Do not take measurements in dangerous ar-
eas or where there is a risk of explosion.
Disconnect the device from the power supply (device and measuring system power
supply) before maintaining, repairing or handling the device's connections.
Please contact the after-sales service if you suspect that there is an operational fault
in the device.
3.2.- RECOMMENDATIONS FOR USINGTHE COMPUTER SMART III REGULATOR IN MEDIUM-VOLT-
AGE AUTOMATIC CAPACITOR BANKS
Computer SMART III regulators can also be used for controlling medium-voltage automatic capacitor
banks, always under the full responsibility of the personnel responsible for starting it up, and taking
into account the various recommendations mentioned below, which should be strictly observed in
every case in order to avoid the possible appearance of problems in the various elements that make
up the capacitor bank.
The voltage and current measurement signals must be supplied to the regulator from
voltage and current transformers that are suitable for the tolerable ranges of the volt-
age and current measurement inputs of the regulator.
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The stage connection and reclosing times must be adapted to the discharge time of
the capacitors, and to the pre-determined operating rates, according to their specific
features, for the capacitor bank operating elements. It is important to remember that
excessively short connection times can cause serious damage to the components of the
device.
Once the device is installed, select the High Voltage option in the programming menu (“5.10.- VOLTAGE
LEVEL”).
When this option is selected the following functions are disabled in the device:
The automatic programming function (Plug&Play).
The function of automatically testing the status of the capacitors (AutoTest).
The leakage current measurement and related alarms.
3.3.- INSTALLATION
The Computer SMART III regulator is connected to devices that contain capacitors,
which are kept charged after the voltage is taken away. Wait at least 5 minutes after
the device is disconnected before handling its internal components, in order to avoid
the risk of electric shock.
Any manipulation or use of the device other than that specified by the manufacturer
may compromise user safety.
Make sure that the devices are correctly earthed before they are connected. A faulty earth connection
could lead to faulty operation and lead to a risk of electrical shock for the user or person handling the
device.
Resonance can occur when the device is connected with no load. In this case, the voltage harmonics
can be amplified, causing damage to the compensation device and other devices connected to the
mains.
The persons responsible for installing or operating the Computer SMART III must follow common
safety measures for LV or MV electrical installations in order to guarantee safe operation according to
the installation location. In addition, they must take into account all the safety warnings stated in this
instruction manual.
The device will be installed on a panel (138+1 x 138+1 mm panel boring, in compliance with DIN 43700).
All connections are inside the electric panel.
Terminals, opening covers or removing elements can expose parts that are hazardous
to the touch while the device is powered. Do not use the device until has been com-
pletely installed.
The device must be connected to a power circuit that is protected with gL fuses (IEC 269) or M fuses,
with a rating of 0.5 to 2 A. It must be fitted with a circuit breaker or equivalent device for disconnecting
the device from the power supply mains.
The power and voltage measurement circuits as well as the relay contact circuits must be connected
with cables that have a minimum cross-section of 1.5 mm2.
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One or three external current transformers (CT) need to be installed in order to measure current. Usu-
ally, the transformation ratio of these CTs is In/5 A, where In is at least 1.5 times the total maximum
load current.
The secondary cables of the current transformers (CT) must have a minimum cross-section of 2.5
mm2. For distances between the CTs and the device of more than 25 m, this cross-section should be
increased by 1 mm2for every 10 m.
The current transformers (CTs) must be installed at the power line connection point which carries all
the current of the loads to be compensated as well as the current that is specific to the capacitors
(Figure 1).
CORRECT INCORRECT
~
P1
P2
S1
S2
TC
LOAD CAPACITORS
The current transformers (CT) must
measure the combined current of the
capacitors plus the loads
If it does not work, make sure that the
CTs are not short-circuited.
~
LOAD CAPACITORS
P1
P2
S1
S2
TC
If the CTs are connected in this
position, NONE OF THE CAPACITORS
WILL BE CONNECTED, even if there
are inductive loads.
The device does not compensate.
~
LOAD CAPACITORS
P1
P2
S1
S2
TC
If the CTs are connected in this
position ALL THE CAPACITORS WILL
BE CONNECTED, but they will not be
disconnected if the load drops.
Risk of over-compensation in the
grid with no load.
Figure 1: Location of the current transformers
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3.4.- DEVICE TERMINALS
Table 3:List of Computer SMART III terminals
Terminals of the top side of the device
1: A1,Auxiliary power supply. 23: R8, Relay output 8 (Computer SMART III 12 and 14 models)
2: A2,Auxiliary power supply. 24: R9, Relay output 9 (Computer SMART III 12 and 14 models)
3: VL1, L1 voltage input 25: R10, Relay output 10 (Computer SMART III 12 and 14 models)
4: VL2, L2 voltage input 26: R11, Relay output 11 (Computer SMART III 12 and 14 models)
5: VL3,L3 voltage input 27: R12, Relay output 12 (Computer SMART III 12 and 14 models)
6: VLN, Neutral voltage input 28: A(+), RS-485
7: S1,L1 current input 29: B(-), RS-485
8: S2, L1 current input 30: S, GND for RS-485
9: S1,L2 current input 31: 1, Digital input 1
10: S2, L2 current input 32: 1, Digital input 2
11: S1,L3 current input 33: C, Common to the digital inputs
12: S2, L3 current input 34: 1, Digital output 1
13: S1,Leakage current input 35: 2, Digital output 2
14: S2, Leakage current input 36: C, Common to the digital outputs
15: COM, Common relays 37: Fan relay output
16: R1, Relay output 1 38: Fan relay output
17: R2, Relay output 2 39: NC, Alarm relay output
18: R3, Relay output 3 40: C, Alarm relay output
19: R4, Relay output 4 41: NO, Alarm relay output
20: R5, Relay output 5 42: COM, Common relays
21: R6, Relay output 6 43: R12, Relay output 13 (Computer SMART III 14 model)
22: R7, Relay output 7 (Computer SMART III 12 and 14 models) 44: R12, Relay output 14 (Computer SMART III 14 model)
3
2
145 6 7 8 9 10 11 12 13
15
14
16
17
18
19
20
21
22
23
24
25
26
27
28 29 30 31 32 33 34 35 36 37 38 39 40 41
42
43
44
Figure 2: Computer SMART III terminals.
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3.5.- CONNECTION DIAGRAM
3.5.1.- 3 voltages + neutral and 3 currents, Computer SMART III 6 model
Connection type: 3U.3C
VLN
IL2
S1
L1
L2
L3
N
VL1 VL2 VL3
S1 S2
P1 P2 S1 S2
P1 P2 S1 S2
P1 P2
S1 S1S2 S2 S2
IL3
IL1
A B
Power
Supply
COM 1 2 3 4 5 6
Relay
Power
Supply
Figure 3: 3 voltages + neutral and 3 currents, Computer SMART III 6 model.
Note: If the connection layout mentioned above is not respected, the phase must be adjusted, following
the procedure described in section “5.6.- PHASE CONNECTION”
Note: In this type of connection, the connection from Neutral to VLN is not mandatory.
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3.5.2.- 3 voltages + neutral and 3 currents, Computer SMART III 12 model
Connection type: 3U.3C
VLN IL2
S1
L1
L2
L3
N
VL1 VL2 VL3
S1 S2
P1 P2 S1 S2
P1 P2 S1 S2
P1 P2
S1 S1S2 S2 S2
IL3
IL1
A1 A2
Power Supply
COM 1 2 3 4 5 6 7 8 9 10 11 12
Relay
For Computer SMART III 12
Power Supply
Figure 4: 3 voltages + neutral and 3 currents, Computer SMART III 12 model.
Note: If the connection layout mentioned above is not respected, the phase must be adjusted, follow-
ing the procedure described in section “5.6.- PHASE CONNECTION”
Note: In this type of connection, the connection from Neutral to VLN is not mandatory.
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3.5.3.- 3 voltages + neutral and 3 currents, Computer SMART III 14 model
Connection type 3U.3C
VLN
IL2
S1
L1
L2
L3
N
VL1 VL2 VL3
S1 S2
P1 P2 S1 S2
P1 P2 S1 S2
P1 P2
S1 S1S2 S2 S2
IL3
IL1
A1 A2
Power
Supply
Power
supply
COM 1 2 3 4 5 6 7 8 9 10 11 12
Relay
13 14 COM
Figure 5: 3 voltages + neutral and 3 currents, Computer SMART III 14 model.
Note: If the connection layout mentioned above is not respected, the phase must be adjusted, following
the procedure described in section “5.6.- PHASE CONNECTION”
Note: In this type of connection, the connection from Neutral to VLN is not mandatory.
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3.5.4.- 3 voltages + neutral and 1 current, Computer SMART III 6 model
Connection type: 3U.1C
VLN
IL2
S1
L1
L2
L3
N
VL1 VL2 VL3
S1 S2
P1 P2
S1 S1S2 S2 S2
IL3
IL1
A B
Power
Supply
COM 1 2 3 4 5 6
Relay
Power
Supply
Figure 6: 3 voltages + neutral and 1 current, Computer SMART III 6 model.
Note: If the connection layout mentioned above is not respected, the phase must be adjusted, follow-
ing the procedure described in section “5.6.- PHASE CONNECTION”
Note: In this type of connection, the connection from Neutral to VLN is not mandatory.
Note: In this type of connection, the current transformer must be connected to the IL1 terminals.
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3.5.5.- 3 voltages + neutral and 1 current, Computer SMART III 12 model
Connection type: 3U.1C
VLN IL2
S1
L1
L2
L3
N
VL1 VL2 VL3
S1 S2
P1 P2
S1 S1S2 S2 S2
IL3
IL1
A1 A2
Power Supply
COM 1 2 3 4 5 6 7 8 9 10 11 12
Relay
For Computer SMART III 12
Power Supply
Figure 7: 3 voltages + neutral and 1 current, Computer SMART III 12 model.
Note: If the connection layout mentioned above is not respected, the phase must be adjusted, following
the procedure described in section “5.6.- PHASE CONNECTION”
Note: In this type of connection, the connection from Neutral to VLN is not mandatory.
Note: In this type of connection, the current transformer must be connected to the IL1 terminals.
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3.5.6.- 3 voltages + neutral and 1 current, Computer SMART III 14 model
Connection type: 3U.1C
VLN
IL2
S1
L1
L2
L3
N
VL1 VL2 VL3
S1 S2
P1 P2
S1 S1S2 S2 S2
IL3
IL1
A1 A2
Power
Supply
Power
Supply
COM 1 2 3 4 5 6 7 8 9 10 11 12
Relay
13 14 C
OM
Figure 8: 3 voltages + neutral and 1 current, Computer SMART III 14 model.
Note: If the connection layout mentioned above is not respected, the phase must be adjusted, follow-
ing the procedure described in section “5.6.- PHASE CONNECTION”
Note: In this type of connection, the connection from Neutral to VLN is not mandatory.
Note: In this type of connection, the current transformer must be connected to the IL1 terminals.
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3.5.7.- 2 voltages and 1 current, Computer SMART III 6 model
Connection type: 2U.1C
VLN
IL2
S1
L1
L2
L3
N
VL1 VL2 VL3
S1 S2
P1 P2
S1 S1S2 S2 S2
IL3
IL1
A B
Power
Supply
COM 1 2 3 4 5 6
Relay
Power
Supply
Figure 9: 2 voltages and 1 current, Computer SMART III 6 model.
Note: If the connection layout mentioned above is not respected, the phase must be adjusted, following
the procedure described in section “5.6.- PHASE CONNECTION”
Note: In this type of connection, the Neutral connection is not necessary.
Note: In this type of connection, the current transformer must be connected to the IL1 terminals, and
the two voltages must be connected to VL1 and VL2.
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3.5.8.- 2 voltages and 1 current, Computer SMART III 12 model
Connection type: 2U.1C
VLN IL2
S1
L1
L2
L3
N
VL1 VL2 VL3
S1 S2
P1 P2
S1 S1S2 S2 S2
IL3
IL1
A1 A2
Power Supply
COM 1 2 3 4 5 6 7 8 9 101112
Relay
For Computer SMART III 12
Power Supply
Figure 10: 2 voltages and 1 current, Computer SMART III 12 model.
Note: If the connection layout mentioned above is not respected, the phase must be adjusted, follow-
ing the procedure described in section “5.6.- PHASE CONNECTION”
Note: In this type of connection, the Neutral connection is not necessary.
Note: In this type of connection, the current transformer must be connected to the IL1 terminals, and
the two voltages must be connected to VL1 and VL2.
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