Transcript DCRK DIGITAL POWER FACTOR CONTROLLERS

DCRK DIGITAL POWER FACTOR
CONTROLLERS
DCRK DIGITAL POWER FACTOR
CONTROLLERS
96X96mm
• DCRK5 5 steps
• DCRK7 7 steps
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144X144mm
• DCRK8 8 steps
• DCRK12 12 steps
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
OPERATING FEATURES
MEASUREMENTS
• Present cosj
• Present L-L voltage + maximum 
• Present current + maximum 
• Dkvar e kvar
• Weekly average P.F.  and present P.F.
• Capacitor overload % + maximum 
• Present panel temperature + maximum .
 Measurement logged in non-volatile memory and keypad clearable.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
OPERATING FEATURES
BUILT-IN PROTECTIONS
• Capacitor current overload
• Capacitor over-voltage
• Panel over-temperature
• No-voltage release.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
OPERATING FEATURES
SETUP
• Base setup with most common settings
(6 parameters)
• Advanced setup with special settings
(16 parameters)
• Fast PC setup
• Fully automatic setup
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
OPERATING FEATURES
ALARMS
• A01 Under-compensation
• A02 Over-compensation
• A03 Low current
• A04 High current
• A05 Low voltage
• A06 High voltage
• A07 Capacitor overload
• A08 High temperature
• A09 No voltage release.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
ADVANTAGES
• Extensive number of measurements
(V-A- kvar- ecc.)
• Capacitor overload protection
• Measurement of weekly average power
factor
• Built-in temperature sensor
• TTL/RS-232 serial communication interface
• Manual or Automatic set-up
• Programmable alarms
• Automatic identification of CT current flow
• Easy CT setting for the final user
• Measurement of power factor as well as
cosj
• Keypad lock function.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
CERTIFICATIONS
cULus (UL for USA and Canada)
COMPLIANCE
IEC61010-1; IEC/EN 61000-6-2;
CISPR 11/EN 55011
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
COMPARISON
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
COMPARISON
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
COMPARISON
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
TECHNICAL SPECIFICATIONS
TRMS = TRUE ROOT MEAN SQUARE
DCRK measurements are calculated in TRMS, to give exact
values also in presence of harmonic distortion.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
TECHNICAL SPECIFICATIONS
COSj = DISPLACEMENT POWER FACTOR
It is in the cosine of the displacement angle between
voltage and current.
DCRK regulators can read correctly the D.P.F.
regardless of the presence of harmonics on current and
voltage waveforms.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
TECHNICAL SPECIFICATIONS
POWER FACTOR
The Power Factor (P.F.) or Total Power Factor (TPF) is
the ratio between active power (W) and apparent
power (VA).
In a system without harmonics, the power factor is
the same value as COSj.
In other conditions, the power factor is less than the
COSj.
Power factor correction systems can adjust the COSj
to the required value and can thereby obtain the best
possible power factor.
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W
P.F. =
VA
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
TECHNICAL SPECIFICATIONS
MEASUREMENT OF WEEKLY
AVERAGE POWER FACTOR
This reading considers the last 7 days of the DCRK
operation.
It is calculated in the same way used by energy
suppliers, storing active and reactive energy meters
in DCRK internal memory.
This value is therefore a true efficiency index of the
entire reactive power correction system.
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Wh
Wh
P.F. =
Varh² ++ Wh²
Wh²
Varh²
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
TECHNICAL SPECIFICATIONS
AUTOMATIC IDENTIFICATION OF CT
CURRENT FLOW
At power up, the DCRK controller automatically
recognizes the current flow direction through the
Current Transformer (CT).
This avoids inverting the CT connections during
installation.
In cogeneration plants, where it is necessary to operate
in 4-quadrant, the CT connection sense must be set
manually.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
TECHNICAL SPECIFICATIONS
EXTREME REDUCTION OF STEP
SWITICHING
A control algorithm provides for the maximum
reduction of the number of operations.
The adjustment is conducted in a precise manner and
not by consecutive attempts.
The reduction of the number of operations
substantially lowers the capacitor and contactor
wear.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
TECHNICAL SPECIFICATIONS
HOMOGENEOUS USE OF EQUAL
RATED STEPS
Each step is provided with one operation counter
and one hour meter, in order to provide an equal
usage of capacitors with the same rating. The
uniform operation of the steps prolongs the life and
efficiency of both the capacitors and contactors.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
TECHNICAL SPECIFICATIONS
AUTOTRIMMING
Consents to the ongoing control of the steps power
installed.
In case of step wear, all the relative power parameters
are automatically recalculated. This allows the DCRK
unit to work rapidly and efficiently, that is with fewer
and quicker operations.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
TECHNICAL SPECIFICATIONS
OVERLOAD PROTECTION OF
CAPACITORS
The capacitor overload can be caused by overvoltage
or, more often, by non-linear loads that cause
harmonic distortion on the voltage line.
The voltage waveform is analysed by special
algorithm that calculates the exact percentage of the
current flowing in the capacitors.
Once the set current overload threshold limit is
exceeded, the capacitors are disconnected within a
time inversely proportional to the exceeding limit.
THD (Total Harmonic Distortion) does not change
with harmonic frequency, and therefore it is not an
indicator of capacitor overload.
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5% 5th HARM
U THD = 5%
CAP OVRL = 102.5%
5% 7th HARM
U THD = 5%
CAP OVRL = 105.5%
5% 11th HARM
U THD = 5%
CAP OVRL = 114.5%
5% 13th HARM
U THD = 5%
CAP OVRL = 120%
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
TECHNICAL SPECIFICATIONS
NO VOLTAGE RELEASE
This function can prevent damage to the capacitors by
disconnecting them from the mains when short power lossess
are detected.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
TECHNICAL SPECIFICATIONS
PROTECTION AGAINST
OVER-TEMPERATURE
The DCRK controllers include an internal temperature
sensor, which monitors the temperature variation of
the electric panel.
This temperature value is displayed and the maximum
value is logged.
By setting related parameters, a threshold can be set
to switch on a relay to operate a ventilation system.
It is also possible to set an higher threshold to
generate an overtemperature alarm.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
TECHNICAL SPECIFICATIONS
M
G
FOUR-QUADRANT OPERATION
When a plant is equipped with a co-generation system, it means there are conditions where energy is
imported (consumed) and others where it is exported (generated).
In these circumstances, the displacement angle between voltage and current can vary between 0° and
360° (four quadrants) so the DCRK must be programmed accordingly.
It is possible to set two independent cosφ setpoints, one for imported and the other for exported
energy.
When working with cogeneration plants, automatic CT connection feature cannot be used.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
TECHNICAL SPECIFICATIONS
EASY CURRENT TRANSFORMER
SETTING
The manufacturer of power factor correction
panels can set all of the setup parameters of the DCRK
except the CT primary, since it depends on the final
customer plant.
In this case, during the system installation and once the
controller is powered up, the display will show a
flashing CT indicating that the CT has
not been programmed.
Just selecting the correct value from the list and storing
it with one key will enable the DCRK operation.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
TECHNICAL SPECIFICATIONS
AUTOMATIC SETUP
Allows the installation of the DCRK controllers
without programming any parameter.
Just pushing two keys, the user is able to put the
DCRK into operation.
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5sec
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
TECHNICAL SPECIFICATIONS
KEYPAD LOCK
The activation of this function is made by a
combination of keys.
Once programmed, the following operations will be
locked:
• Access to parameter setup
• Changing of COSj setpoint
• Changing the operating mode (AUT/MAN)
• MAX values clearing
1° MODE
2° 3 x
3° 2 x
However, all the measurements will be still
accessible.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
TECHNICAL SPECIFICATIONS
TTL / RS-232 INTERFACE
By using the DCRK SW software and the TTL/RS-232 interface, a quick set-up of the controller can be
achieved via PC, avoiding in this way, possible parameter setting errors.
The DCRK programmed parameters can also be stored on the PC and quickly downloaded into an
unlimited number of units, which require the same programming.
The customising of alarm properties can be made as well as the automatic panel testing with the
control of the power installed and the test report printing too.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
DCRK SW SOFTWARE
TTL / RS-232
COMMUNICATION PORT
• Full system monitoring:
- Graphic and numeric
measurements display
- DCRK status
- Virtual front panel
• For each step:
-
Function
Status
Reactive power
Operation counter
Hour meter.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
DCRK SW SOFTWARE
MONITORING THE CAPACITORS EFFICIENCY
• Measurement of the
actual kVar of each
capacitor step.
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• Counter for the number
of switching operations
of each capacitor step.
• Time counter for the
total connection time
of each capacitor step.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
DCRK SW SOFTWARE
TTL / RS-232 COMMUNICATION
PORT
• Access to all setup parameters in
four languages
• Save / Load / Print parameters
• Highlighted user changes
• Back-to-default button.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
DCRK SW SOFTWARE
TTL / RS-232
COMMUNICATION PORT
• Alarm properties customization
- Alarm enable
- Alarm relay activation
- Step disconnection
- Alarm trip delay.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
DCRK SW SOFTWARE
TTL / RS-232
COMMUNICATION PORT
• Automatic testing of
electric panel.
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
SPECIAL POWER FACTOR CORRECTION CONTACTORS
Kvar (400V)
60
60
50
45
38
40
30
8
20
BF25K
20
15
BF20K
30
12,5
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Contactor
BF80K
BF65K
BF50K
BF40K
BF12K
BF9K
10
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
SPECIAL POWER FACTOR CORRECTION CONTACTORS
KITS TO ASSEMBLE BF..K CONTACTORS
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DCRK DIGITAL POWER FACTOR
CONTROLLERS
Other products for your power factor correction system
Push buttons and selectors
Switch disconnectors
Digital multimeters
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THANK YOU AND GOODBYE
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