5 BASIC INSTRUCTIONS TO BROWSE THE MENUS ..................................................................................... 21
5.1 BROWSING THE MENUS:FUNCTIONS OF THE KEYS ............................................................................................. 21
5.2 MAIN MENU AND DEFAULT MENU ...................................................................................................................... 21
5.3 BASIC OPTIONS OF THE MAIN MENU .................................................................................................................. 22
5.4 EDITING NUMERICAL OR LITERAL FIELDS ........................................................................................................... 23
6.2 DEVICE SETUP MENU .......................................................................................................................................... 25
6.3 ALARM SETUP MENU .......................................................................................................................................... 26
6.4 ALARM STATUS MENU ........................................................................................................................................ 27
6.5 HARMONICS MENU ............................................................................................................................................. 28
6.6 TEST MENU ........................................................................................................................................................ 29
7 DEVICE SETUP: SETUP MENU ......................................................................................................................... 29
7.3.1 General information about the Setup menu ............................................................................................... 37
7.3.2 Entering the setup menu ............................................................................................................................ 37
7.3.3 Adjusting Capacitor Power ....................................................................................................................... 38
7.3.4 Adjusting and configuring the nominal voltage of capacitors................................................................... 39
7.3.5 Adjusting the connections of current transformers (CT) ........................................................................... 39
7.3.6 Adjusting the transformer ratios ............................................................................................................... 40
7.3.7 Adjusting the cos objective..................................................................................................................... 41
7.3.8 Adjusting the Tact and Trec times ............................................................................................................. 42
7.3.9 Adjusting the compensation mode ............................................................................................................. 42
7.3.10 Adjusting the Date and Time ..................................................................................................................... 43
7.3.11 Adjusting the Display ................................................................................................................................ 44
7.3.12 Adjusting Communication Settings ........................................................................................................... 45
9.3 CONFIGURING EACH ALARM .............................................................................................................................. 53
9.4 SPECIAL ALARM SCENARIOS .............................................................................................................................. 54
9.4.1 Alarm Ileak (A) I leak ................................................................................................................................ 54
9.4.2 IC Alarm out of the margin ....................................................................................................................... 54
9.4.3 Current Failure Alarm .............................................................................................................................. 54
9.5 PROGRAMMING THE ALARM RELAY ................................................................................................................... 55
10 VIEWING THE STATE OF THE ALARMS .................................................................................................. 55
10.1 OPENING THE ALARM DISPLAY MENU ................................................................................................................ 56
10.2.1 Parameters displayed on the alarm status screens. .................................................................................. 57
10.2.2 I leak alarm ............................................................................................................................................... 59
10.2.3 IC out of the margin Alarm. ...................................................................................................................... 59
10.2.4 Current Fault Alarm.................................................................................................................................. 59
12 TEST .................................................................................................................................................................... 62
12.1 OPENING THE TEST MENU .................................................................................................................................. 63
12.2 TEST COS AND RESONANCE TEST .................................................................................................................... 63
12.3 CAPACITORS TEST ............................................................................................................................................. 64
13 CONNECTION OF COMPUTER PLUS WITH CPC3I CARDS .................................................................. 65
17 TECHNICAL SERVICE .................................................................................................................................... 69
4
INTRODUCTION
CAUTION!
The installation and maintenance of the unit must be performed by duly
trained and authorised staff, in accordance with the national and
international standards.
DANGER!
Before performing any maintenance operation on the cos φ regulation units,
be sure to disconnect the main switch. After disconnecting it, wait at least 5
minutes to ensure that the capacitors are totally discharged.
CIRCUTOR S.A. would like to thank you for showing your trust by choosing one of our Computer plus
series regulators
These units are constructed with state-of-the-art technology, including a powerful DSP to calculate the
optimum algorithms for achieving the best compensation of cos φ.
The units comply with the Electrical Safety Standard EN 61010, in accordance with the requirements of the
Low Voltage Directive (LVD) 73/23/EC and EMC Directive (2004/108/EC) and, therefore, they are certified to
carry the CE mark.
This user manual describes the operation of the Computer plus TF series regulators and shows the user
the procedures required to install, commission and operate the units.
SAFETY
During the installation, maintenance or commissioning of the units regulated by a Computer plus unit, the
following safety precautions must be observed:
Before connecting the units make sure the earth terminals have been connected correctly. A
defective earthing connection may cause the unit to work incorrectly and represent a danger of
electric shock to the user the person operating it.
5
Maintenance must be performed taking the necessary precautions to avoid electrocution and electric
shock. Before any intervention, we recommend you ensure the unit has been disconnected and wait
during the time necessary for the capacitors to be totally discharged. We recommend the use of
safety goggles and gloves when necessary.
If the PF compensation units are connected without load, resonance may occur, so that the voltage
harmonics may be amplified and may damage the compensation unit and other equipment
connected to the network.
The start-up and interruption procedures indicated in the manual must be followed to avoid
damaging the unit and/or adjacent units.
The adjustment or replacement of components or parts of the unit must be made with original
replacement parts and in accordance with the procedures described in the corresponding instruction
manual.
The regulators in the Computer plus series are power factor regulators that incorporate the latest advances
in technology regarding power factor compensation and harmonic filtering, both in systems with contacts and
in fast systems. The core of the controller is a state-of-the-art DSP processor that allows the quick and
efficient execution of advanced control algorithms.
The Computer plus TF regulators described in this manual are static switching regulators to be used with
contactor-driven capacitor banks. For information about the Computer plus T8 and T14 types for
contactors, see manual M98223001-01-AAx. (AAx: AA are the last two digits of the year of revision and x is
an alphabetical character, A…Z, used to indicate the version).
Fig. 1 .- Schematic diagram of connections
7
TYPE
VOLTAGE
(Vac)
OUTPUT
MEASURE
MENT
OTHER FUNCTIONS
Computer plusTF-C
110-480
16 static
outputs
Threephase
Basic type for static capacitor banks
(Includes Communications)
Computer plusTF-CDI
110-480
16 static
outputs
Threephase
Basic type of static capacitor banks +
Leakage measurement + Measurement of I
capacitors
Types and basic functions:
8
Auxiliary power supply:
110 to 480 Vac (50…60 Hz) (± 10%)
Consumption of the unit:
6.6 VA / 230 V ÷ 19 VA / 400 V ÷ 24.9 VA / 480 V
Voltage circuit:
Measurement margin
5% to 120 % for Un = 300 Vac (phase-neutral)
5% to 120 % for Un = 520 Vac (phase-phase)
Maximum consumption
< 0.6 VA
Frequency
45 ... 65 Hz
Intensity circuit:
Nominal current
Transformers In / 5 Aac or In / 1 Aac
Admissible overload
6 A permanent, 100 A t< 1 s
Consumption (…/5 A and …/ 1
A)
< 0.45 VA
Integrated control system
FCP or Linear / 4 quadrants
Integrated control algorithms
Three-phase and Phase-Phase (Star or Delta)
Communications of Computer
plus with CPC3i (Nonconfigurable):
Bauds
38400 bps
Parity
NO
No. Bits \ Stop
8 / 1
Frame
See Section 13
Environment:
Operating temperature
-10º to +50 ºC
Storage temperature
-20º to +65 ºC
Maximum relative humidity
95 % non-condensing
Maximum operating altitude
2000 m (over sea level)
Installation category
Installation category III, in accordance with IEC 61010
Contamination level
2, in accordance with IEC 61010
Protection degree
IP 51 front panel - IP 20 rear panel
Safety:
Installation category
Installation category III, in accordance with IEC 61010
Protection to electric shock
Double insulation class II
Designed and identified with the CE mark
2 TECHNICAL SPECIFICATIONS
9
Construction features:
Connection
Direct connection terminals for rigid 2.5 mm wire (4,5 mm2) or flexible
(AWG 11)
The unit is intended to be installed in the panel door (138+1 x 138+1 mm in accordance with DIN 43 700).
10
L1
L2
L3
N
AC SUPPLY
CO
M
AL1
L
C
1G1
1K1
1G2
1K2
2G1
2K1
2G2
2K2
3G1
3K1
3G2
3K2
Power Block
CPC3i-xRS
0V
230V
400V
2G2
2K2
2G1
2K1
3G2
3K2
3G1
3K1
1K2
1G2
1G1
1K1
AL1
COM
SH
RS+
RS-
A
B
C
D
E
ADJ
CO
M
AL1
L
C
1G1
1K1
1G2
1K2
2G1
2K1
2G2
2K2
3G1
3K1
3G2
3K2
CPC3i-xRS
0V
230V
400V
2G2
2K2
2G1
2K1
3G2
3K2
3G1
3K1
1K2
1G2
1G1
1K1
AL1
COM
SH
RS+
RS-
A
B
C
D
E
ADJ
CO
M
AL1
L
C
1G1
1K1
1G2
1K2
2G1
2K1
2G2
2K2
3G1
3K1
3G2
3K2
CPC3i-xRS
0V
230V
400V
2G2
2K2
2G1
2K1
3G2
3K2
3G1
3K1
1K2
1G2
1G1
1K1
AL1
COM
SH
RS+
RS-
A
B
C
D
E
ADJ
F1 F2 F4F3
313233
A+
B-
S
S
B-
A+
S
B-
A+
S
B-
A+
1
2
2S2
1S1
1S2
2S1
3S2
3S1
7
8
9
10
11
12
To external current
transformers
Power Block
Power Block
3 STANDARD CONNECTION DIAGRAMS
Fig. 3 .- Connection of Computer plus with various CPC3i-RS cards
11
L1
L2
L3
N
AC SUPPLY
CO
M
AL1
L
C
1G1
1K1
1G2
1K2
2G1
2K1
2G2
2K2
3G1
3K1
3G2
3K2
Power Block
CPC3i-xRS
0V
230V
400V
2G2
2K2
2G1
2K1
3G2
3K2
3G1
3K1
1K2
1G2
1G1
1K1
AL1
COM
SH
RS+
RS-
A
B
C
D
E
ADJ
F1 F2F4F3
313233
S
B-
A+
1
2
2S2
1S1
1S2
2S1
3S2
3S1
7
8
9
10
11
12
To external current
transformers
345
OPTIONAL
6
A+
B-
S
IMPORTANT: Computer plus TF-C and TF-CDI always use static capacitor banks with the CPC3i-xRS card
and both are connected through an RS-485 channel. The peripheral number must be configured on each
CPC3i-xRS card (see Section 13).
Fig. 4 .- Details of the connection of a step to CPC3i-RS
12
Card A: Com + Measure C + Leakages
Card B: Relays
Card C: P.S. + measure + Alarm relay
w
w
w
Computer plusTF includes two printed circuit
boards or cards.
Card A: Communications. Capacitor Current
Measurement and Leakage Measurement
Card C: Power supply and measurement of line
voltages and currents
CARD C TERMINALS
FUNCTION
1
Power supply
2
Power supply
3
Voltage 1
4
Voltage 2
3.1 Cards and Functions
3.2 Allocation of terminals
3.2.1 Card C: Power supply and measurement
Fig. 5.- Power supply and measurement terminals
13
5
Voltage 3
6
Neutral
7
Secondary 1 Current IA
8
Secondary 2 Current IA
9
Secondary 1 Current IB
10
Secondary 2 Current IB
11
Secondary 1 Current IC
12
Secondary 2 Current IC
13
Alarm Relay NC Contact
14
Alarm Relay Common
15
Alarm Relay NO Contact
3.2.2 Card A: Communications, measurement of I in capacitors and measurement of I in
leakages
Fig. 6.- Card A Terminals for Computer plus TF-C
Fig. 7.- Card A Terminals for Computer plus TF-CDI
14
CARD A TERMINALS
ALLOCATION
FUNCTION
31
A+
Terminal A+ RS-485 (control of capacitors Only TF versions)
32
B-
Terminal B- RS-485 (control of capacitors Only TF versions)
33 S Terminal S- RS-485 (control of capacitors Only TF versions)
34
A+
Terminal A+ Communications RS-485
35
B-
Terminal B+ Communications RS-485
36
S
Terminal S Communications RS-485
37
COM (1)
Common Digital Inputs
38
D1 (1)
Digital Input 1
39
D2 (1)
Digital Input 2
40
D3 (1)
Digital Input 3
41
D4 (1)
Digital Input 4
42
D5 (1)
Digital Input 5
43
IF - S1 (1)
Earth leakage transformer, I leakages Secondary 1
44
IF - S2 (1)
Earth leakage transformer, I leakages Secondary 2
45
IC1 - S1 (1)
Metering transformer, I capacitors, phase 1. Secondary 1
46
IC1 - S2 (1)
Metering transformer, I capacitors, phase 1. Secondary 2
47
IC2 - S1 (1)
Metering transformer, I capacitors, phase 2. Secondary 1
48
IC2 - S2 (1)
Metering transformer, I capacitors, phase 2. Secondary 2
49
IC2 - S1 (1)
Metering transformer, I capacitors, phase 3. Secondary 1
50
IC1 - S2 (1)
Metering transformer, I capacitors, phase 3. Secondary 2
(*) The grey boxes are only available in Computer plus TF-CDI
15
3.3 Connection of current transformers
The unit measures the current of the three input phases with three current transformers. The PF equipment
requires current transformers, which must be installed at the mains supply line, so that the total current of the
installation can flow through them (load current + current of the capacitors).
16
Fig. 8 .- Connection of the line current transformers
17
4 SETTINGS AND START-UP
Read the safety instructions in the introduction of this manual. You must respect these conditions to
guarantee the safe operation of the unit and keep it in good condition regarding safety. The unit must not be
used and programmed until it has been installed in its final position in the electrical panel with the adequate
protection elements.
If you use the unit in a way that is not specified by the manufacturer, the protection of the unit may
be compromised.
If the unit has been damaged, burnt or hit by any element, the internal circuits might have been damaged
and the safety protection elements might not been in full working order. In this case, disconnect the power
supply and contact the authorised Technical Service to request a replacement.
4.1 Verifications that must be carried out before powering the unit:
Before powering the unit, check the following points:
a.- Auxiliary power supply:
- Voltage: 110 - 480 Vac (± 10%)
- Frequency: 50 ... 60 Hz
b.- Nominal voltage in the voltage measurement circuit:
- Maximum nominal voltage: U
: 300 Vac / U
p-N
: 520 Vac
p-p
- Frequency: 45 ... 65 Hz
c.- Nominal current in the current measurement circuit:
- Secondary … / 5 A:5 Aac
- Secondary … / 1 A:1 Aac
d.- Operating conditions:
- Operating temperature: -10º to +50 ºC
- Relative humidity: < 95 % non-condensing
e.- Safety:
- Designed for CAT III 300/520 Vac installations, in accordance with EN61010.
- Double-insulated electric shock protection class II.
The unit is intended to be installed in the panel door (drill panel, in accordance with DIN 43 700):
- Drill panel 138+1 x 138+1 mm
18
All connections are inside electric panel.
Remember that with the unit connected, the terminals may be hazardous to the touch, and
opening the covers or removing elements may provide access to parts that are dangerous to
the touch. The unit must not be used until it is fully installed.
The regulator should be connected to a power supply circuit protected by gl type (IEC 269) or
M type fuses (IEC 127), rated between 0.5 and 2 A. It should be provided with a MCB or
equivalent device to switch off the system from the power supply circuit. Both power supply and
voltage measuring circuits as well as connections to different relays will be wired with cables of
a minimum cross-section of 1 mm2 (AWG 17). The current transformer secondary side
connection line should have a minimum cross section of 2 mm2 (AWG 14) and with a minimum
temperature rating of 60 ºC.
To connect a Computer plus regulator to a power factor compensation unit, follow these steps:
Connect the power supply terminals (1 and 2 in Card C) to the control panel's voltage source.
Connect terminals VL1, VL2, VL3 and the neutral N (if available) to the network's phases and neutral.
VERY IMPORTANT!
The device considers that phase 1 is the phase connected to the VL1; phase 2 will be that connected
to VL2 and phase 3 that connected to the regulator's VL3. (Cables L1, L2 and L3 of the power supply
connection).
Connect current transformers T1, T2 and T3 to phases 1, 2 and 3, respectively. If you do not connect
each transformer to the corresponding phase, the “Plug and Play” setting can be used to detect them
automatically. In addition, they can be configured manually with the Connection of Transformers V-I
option in the Setup menu folder.
Make sure that the cables (S1-S2) coming from the secondary connections of the current transformers
are connected to terminals S1-S2 of the Computer plus unit. If you do not connect each transformer to
the corresponding phase, the “Plug and Play” setting can be used to detect them automatically. In
addition, they can be configured manually with the Connection of Transformers V-I option in the Setup
menu folder.
19
4.2 Energising the regulator.
The device can be energised once the power supply and measuring cables have been connected.
After energising the Computer plus unit and waiting for a start-up time of 10 seconds, the device will
start to display the values measured. Some information might not be coherent (cos out of reasonable
margins, active power values with a negative sign, etc.). This is usually the result of incorrect
connections (current transformers connected to the incorrect phase or inverting S1-S2).
Any of these errors can be solved without changing the cables; simply enter the setup menu of the
device, select option Connection of Transformers V-I(see section 7.3), or execute the “Plug and Play”
option (see section 7.2).
NOTE: If you connect the unit and it does not operate, remember that it must be put in the RUN mode
(section 7.3.9). In particular, this is essential when working with static capacitor banks, given their
fast operation, in order to avoid the connection of all capacitors when they are powered, causing an
accident due to an overcompensation.
4.3 Regulator settings.
ATTENTION:
The Computer plus TF-C and TF-CDI regulator is delivered with the outputs disabled as the default
factory settings. Therefore, when you connect the voltage and before adjusting the setup, do not
connect any capacitor step. If any capacitor is connected, set the Computer plus in the STOP status
(See Section 7.3.9) and adjust it in accordance with the instructions in Section 7.
When the regulator is installed on a CIRCUTOR capacitor bank, it has already been set-up and its
final location will only need you to select the “Plug & Play” option (see section 7.2).
If you are sure that the regulator has not been set-up and a capacitor connects, this indicates that
something is working incorrectly. In this case, check the settings in accordance with the instructions
in section 7.
Follow these steps to adjust the unit:
Apply voltage to the unit and follow the set-up instructions in section 7.
Configure the alarms according to your needs by following the instructions in section 8.
If you have a communications network and you wish to integrate the PF compensation unit into the
SCADA Power Studio, follow the instructions in section 11.
20
Fig. 9.- Start screen
Fig. 10.- Information screen
5 BASIC INSTRUCTIONS TO BROWSE THE MENUS
5.1 Browsing the menus: Functions of the keys
The Computer plus system has four dynamic keys, marked F1F2F3 and F4. Dynamic means that the
functions of these keys is not always the same, because it changes on each screen. The function of each
key is shown on the lower line of the corresponding screen. For example, on the screens on Fig. 10 and 11,
the functions of the keys correspond to the indications on the boxes on the lower part of the screen.
In general, you can return to the main menu from any screen, by pressing the F1 key until the screen shown
on Fig. 12 is displayed.
5.2 Main menu and default menu
Normally, when you power the device it performs an initial test and during this time it shows the start screen
(Fig. 9). After 5 seconds, it will show an information screen (Fig. 10) with the model, software version,
language, date and time and serial number.
After 5 seconds showing the information screen, the unit will display the default screen by default in the
STOP mode (Fig. 11). If the unit is in the RUN MODE, the Fig.12 displayed on screen will be displayed,
indicating the kvar connected in each phase.
ATTENTION: If the unit has not been set-up, and the screen shown on Fig. 12, is displayed set the unit in
the STOP mode (press the Stop) key and return to the screen shown on Fig.10. Next, check the settings,
following some of the procedures described in Section 7.
21
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