CIRCUTOR MAX Plug Play User Manual
Power factor regulators
computer MAX 6 / computer MAX 12
Instructions Manual
( M98228201-03-14A)
M98228201-03-14A computer MAX 6 / computer MAX 12
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M98228201-03-14A computer MAX 6 / computer MAX 12
Index______________________________________________________________
1 INTRODUCTION AND SAFETY RECOMMENDATIONS ....................................................................... 4
1.1 DELIVERY SPOT CHECK.................................................................................................................................... 4
1.2 STARTING SCREEN ........................................................................................................................................... 5
1.3 DEFINITIONS .................................................................................................................................................... 5
1.3.1 Four quadrant regulators ...................................................................................................................... 5
1.3.2 FCP program (FAST Computerized Program). .................................................................................... 5
1.3.3 Stages and steps .................................................................................................................................... 5
1.3.4 Stages ratio program ............................................................................................................................. 5
1.3.5 Plug & Play. .......................................................................................................................................... 6
2 GENERAL CHARACTERISTICS .................................................................................................................. 6
3 FRONT PANEL: SCREEN AND KEYBOARD ............................................................................................. 7
3.1 DISPLAY SCREEN ............................................................................................................................................. 8
3.2 MEASURED PARAMETERS ................................................................................................................................ 8
3.3 ERRORS AND ERROR MESSAGES .................................................................................................................... 8
3.4 ALARM RELAY ................................................................................................................................................. 8
3.5 REGULATOR STATUS AND KEY FUNCTIONS ...................................................................................................... 9
3.5.1 Key functions in normal RUN status. .................................................................................................... 9
3.5.2 Key functions in SET-UP status. ........................................................................................................... 9
4 INSTALLATION AND START UP .............................................................................................................. 10
4.1 TECHNICAL CHARACTERISTICS ..................................................................................................................... 10
4.2 DEVICE INSTALLATION .......................................................................................................................... 11
4.2.1 Mechanical Installation ....................................................................................................................... 11
4.2.2 Connections ......................................................................................................................................... 11
4.2.3 Cabling cross sections and protections ............................................................................................... 12
4.2.4 Schematics ........................................................................................................................................... 12
5 CONFIGURABLE PARAMETERS .............................................................................................................. 13
5.1 PLUG&PLAY FUNCTION ................................................................................................................................. 13
5.2 TARGET COSΦ ................................................................................................................................................ 13
5.3 SMALLER AVAILABLE CAPACITOR STEP ......................................................................................................... 13
5.4 C/K PARAMETER CALCULATION .................................................................................................................... 14
5.5 STAGE’S CONFIGURATION OF PF CORRECTION EQUIPMENT (CONFIGURATION PROGRAM) ............................ 14
5.6 CONNECTION AND RE-CONNECTION TIME SETTINGS: ..................................................................................... 15
5.7 SELECTION OF THE NUMBER OF STAGES. ........................................................................................................ 15
5.8 U,I PHASE ANGLE SETTING............................................................................................................................. 15
5.9 PROGRAMMING THE CT RATED CURRENT (PRIMARY). .................................................................................. 16
6 SET-UP MENU AND PROCEDURE. ........................................................................................................... 16
6.1 HOW TO ACCESS THE SET-UP MENU. .............................................................................................................. 16
6.2 NAVIGATION SCHEMATIC. ............................................................................................................................. 17
7 RUN STATUS .................................................................................................................................................. 18
7.1 FUNCTIONS OF THE DEVICE IN NORMAL RUN MODE. ..................................................................................... 18
7.2 COMPUTER MAX BEHAVIOUR IN ALARM MODE ......................................................................................... 19
8 MAINTENANCE ............................................................................................................................................ 19
9 TECHNICAL SERVICE ................................................................................................................................ 19
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M98228201-03-14A computer MAX 6 / computer MAX 12
1 INTRODUCTION AND SAFETY RECOMMENDATIONS
CIRCUTOR S.A. would like to thank you for showing your trust by choosing one of our Computer
series regulators. These units are constructed with the latest state-of-the-art technology, including a
powerful processor to calculate the optimum algorithms for achieving the best compensation of cosφ.
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
the procedures required to install, commission and operate the units.
Computer MAX series regulators and shows the user
MAX
SAFETY
The installation and maintenance of the unit must be performed by duly trained and
authorised staff and in accordance with the national and international standards. Any
inappropriate manipulation or use of this equipment out of the conditions specified by the
CAUTION!
DANGER!
During the installation, maintenance or commissioning of equipment regulated by a Computer
unit, the following safety precautions must be observed:
manufacturer may involve serious dangers to the user.
Before performing any maintenance operation on the Computer and associated PF
compensation equipment, be sure to disconnect the main switch. After disconnecting the
switch, wait at least 5 minutes to ensure that the capacitors are totally discharged.
MAX
Before connecting the equipment make sure that the earth terminals have been properly connected.
A defective earth connection may cause a wrong operation of equipment and involves a danger of
electric shock to the user or system operator.
Maintenance must be performed taking the necessary precautions to avoid electrocution and electric
shock. Ensure that the unit has been disconnected and wait the necessary time to ensure that the
capacitors are totally discharged before any maintenance action. We recommend the use of safety
goggles and gloves when cabinet doors are open and protection covers removed.
If a PF compensation unit is connected to mains and capacitors are accidentally connected without
load, a resonance may occur. In such condition voltage harmonics may be amplified, cause
overvoltage and damage the compensation unit and other equipment connected to the mains.
The start-up and interruption procedures indicated in the manual must be followed to avoid
damaging the PF equipment and/or other equipment connected to mains.
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.
1.1 Delivery spot check
After unpacking the equipment check the following points:
Check that equipment has not suffered any damage during transport.
The equipment corresponds to type you ordered. (See label at the rear face, fig. 1.1)
Check that the characteristics in the label are suitable for the site where the regulator has to be
installed. (Supply voltage and frequency, measuring range, etc.)
Follow the instructions in section 3 for installation and set-up.
If you may observe any anomaly during the installation or set-up, contact with CIRCUTOR,
technical service.
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M98228201-03-14A computer MAX 6 / computer MAX 12
Fig. 1.1.- Rear face label
1.2 Starting screen
When the Computer MAX is started (just after supply connection) the screen
shows a code indicating the device version. It’s important to indicate this code in
case of reporting any device fault or error.
1.3 Definitions
In this section we shall give several definitions which will be useful to understand several sections of this
manual
1.3.1 Four quadrant regulators
This term is used to describe the regulators which are able to perform measure and control, either if the
active power flows from the utility to the customer network (the common case of a consuming facility) or if
it flows in the reverse sense. The later is the case of facilities containing power generation equipment
which export some amount of generated power to the utility.
1.3.2 FCP program (FAST Computerized Program).
The units having FCP program, control the switching of capacitor stages in order to minimize the number
of switching operations to reach the required PF compensation. Moreover, the program assigns the
capacitor stages to be connected or disconnected using a FIFO criterion (FIFO= First IN, first OUT), that
way the times of use of all stages are equalized.
1.3.3 Stages and steps
We must distinguish between these two terms. In this manual we call STAGE to each of the capacitor
groups that constitute the PF correction unit. The capacitor stages in PF correction equipment may have
all the same power or not, as explained in the following paragraphs.
The term STEP is used to describe the minimum fraction of reactive power in which the PF correction
equipment is divided. Usually this is the power of the lower stage.
1.3.4 Stages ratio program
Powers of successive capacitor stages in PF correction equipment generally follow certain patterns called
stages ratio program or simply “Program”. The stages program indicates the relationship between the
different capacitor stage powers. Most common stages ratio programs are the as follows:
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M98228201-03-14A computer MAX 6 / computer MAX 12
Program 1:1:1. All capacitor stages have the same rated power (kvar). For instance, a 5-stage unit of
100 kvar would be formed by 5 equal stages of 20 kvar and would be described as a unit of (5 x 20) kvar.
Program 1:2:2. All capacitor stages from the second and up have a rated power (kvar) which is twice the
rated power of first stage. For instance, a 5-stage unit of 180 kvar would be formed by a first stage of 20
kvar and 4 equal stages of 40 kvar, and would be described as a unit of (20 + 4 x 40) kvar.
Program 1:2:4. The rated power of the second stage is twice the rated power of the first stage and the
rated power of third stage and up is 4 times the power of the first stage. For instance, a 5-stage unit of
300 kvar would be formed by a first stage of 20 kvar, a second stage of 40 kvar and 3 equal stages of 80
kvar, and would be described as a unit of (20 + 40 + 3 x 80) kvar.
Other switching programs. Other switching programs are also commonly available, like 1:2:2:4 or
1:1:2:2, etc. Abbreviated designation form, as can be deduced from previous cases, consists of a
sequence of numbers giving the relationship between the different stage powers (kvar), and the first
stage power, which value is taken as unit (1 ). The successive stages will be designated by 1, or 2 or 4,
etc. meaning that the kvar ratio of such stages with regard to first stage are equal, twice, four times, etc.
1.3.5 Plug & Play.
When a reactive energy regulator is installed, a series of parameters must be configured for its correct
operation. Some of these parameters might be hard to know, such as, for example, the voltage phases or
the voltage corresponding to the current measured, as well as the current transformer ratio. The
Computer MAX features a smart automatic process that detects the necessary parameters, such as:
- C/K: calculates the ratio between the current transformer and the power of the smallest step.
- Phase: identifies the phase sequence between voltages and the correspondence with the connected
current.
2 GENERAL CHARACTERISTICS
The power factor regulators, of types Computer
MAX 6 and MAX 12 measure the cos φ
(sometimes called Displacement Power Factor,
DPF) in a supply network and control the connection
and disconnection of power capacitors in order to
regulate such parameter.
The difference between the two types is the number
of output relays, which determines the number of
stages that they can control.
Type MAXimum Nr of
output relays
computer MAX 6
computer MAX 12
Among the most important features of this PF regulator series we can stand out the following:
- FCP regulation system, which minimizes the number of switching operations.
- Wide choice of switching programs: 1:1:1, 1:2:2, 1:2:4 , 1:1:2:2, etc. which allows the split up of
the total power into up to 31 steps in
- Four quadrants control (see fig.2.1) , display of the connected stages, of cos φ
MAX 6 or up to 79 steps in MAX 12.
6 relay outputs
12 relay outputs
and active and
reactive power signs (inductive or capacitive )
- LCD display screen with three seven segments characters plus 20 icons to sign up the different
possible working conditions.
- Regulator set-up with only three keys and without disconnecting the device from the supply.
- Multiple supply frequency range, either 50 or 60 Hz
- Main electrical parameters displayed during RUN mode
- Easy panel mounting, without the need of tools.
- Front frame size (144 x 144 mm) according to DIN 43 700 (panel hole 138
- Measurement and power supply in one single input.
- Four quadrant regulation (suitable for installations importing or exporting energy)
+1
x 138+1 mm)
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