DCRK DIGITAL POWER FACTOR CONTROLLERS

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DCRK DIGITAL POWER FACTOR CONTROLLERS
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DCRK DIGITAL POWER FACTOR CONTROLLERS
96X96mm
144X144mm

• DCRK5 5 steps
• DCRK7 7 steps

• 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.
W
W
P.F.
P.F.
VA
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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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
5 5th HARM U THD 5 CAP OVRL 102.5
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.
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
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 cosf 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.
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
• However, all the measurements will be still
  accessible.

1 MODE 2 3 x 3 2 x
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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

• Counter for the number
• of switching operations
• of each capacitor step.

• Time counter for the
• total connection time
• of each capacitor step.

• Measurement of the
• actual kVar 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
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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
www.LovatoElectric.com