DCRK DIGITAL POWER FACTOR CONTROLLERS. 2 M23 GB 21 07 03 DCRK DIGITAL POWER FACTOR CONTROLLERS...

DCRK DIGITAL POWER FACTOR DCRK DIGITAL POWER FACTOR CONTROLLERSCONTROLLERS


2M23 GB 21 07 03


96X96mm

• DCRK5 5 steps

• DCRK7 7 steps

144X144mm

• DCRK8 8 steps

• DCRK12 12 steps

3M23 GB 21 07 03


OPERATING FEATURES

MEASUREMENTS

• Present cos• Present L-L voltage + maximum • Present current + maximum • kvar 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.

4M23 GB 21 07 03


OPERATING FEATURES

BUILT-IN PROTECTIONS

• Capacitor current overload

• Capacitor over-voltage

• Panel over-temperature

• No-voltage release.

5M23 GB 21 07 03


OPERATING FEATURES

SETUP

• Base setup with most common settings

(6 parameters)

• Advanced setup with special settings

(16 parameters)

• Fast PC setup

• Fully automatic setup

6M23 GB 21 07 03


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.

7M23 GB 21 07 03


ADVANTAGES• Extensive number of measurements (V-A- kvar- ecc.)

• Capacitor overload protection

• Measurement of weekly average powerfactor

• 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 cos• Keypad lock function.

8M23 GB 21 07 03


CERTIFICATIONS

COMPLIANCE

cULus (UL for USA and Canada)

IEC61010-1; IEC/EN 61000-6-2;

CISPR 11/EN 55011

9M23 GB 21 07 03


COMPARISON

10M23 GB 21 07 03


COMPARISON

11M23 GB 21 07 03


COMPARISON

12M23 GB 21 07 03


TECHNICAL SPECIFICATIONS

TRMS = TRUE ROOT MEAN SQUAREDCRK measurements are calculated in TRMS, to give exact

values also in presence of harmonic distortion.

13M23 GB 21 07 03



COS = 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.

14M23 GB 21 07 03

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 COS.In other conditions, the power factor is less than the COS.Power factor correction systems can adjust the COS to the required value and can thereby obtain the best possible power factor.



POWER FACTOR

P.F. = W

VA

P.F. = W

VA

15M23 GB 21 07 03



MEASUREMENT OF WEEKLY AVERAGE POWER FACTORThis 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.

Wh Wh

Varh² + Wh² Varh² + Wh² P.F. = P.F. =

16M23 GB 21 07 03



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.

17M23 GB 21 07 03



EXTREME REDUCTION OF STEP SWITICHINGA 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.

18M23 GB 21 07 03

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.



HOMOGENEOUS USE OF EQUAL RATED STEPS

19M23 GB 21 07 03



AUTOTRIMMINGConsents 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.

20M23 GB 21 07 03



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% 5th HARM

U THD = 5%

CAP OVRL = 102.5%

5% 5th HARM

U THD = 5%

CAP OVRL = 102.5%

5% 7th HARM

U THD = 5%

CAP OVRL = 105.5%

5% 7th HARM

U THD = 5%

CAP OVRL = 105.5%

5% 11th HARM

U THD = 5%

CAP OVRL = 114.5%

5% 11th HARM

U THD = 5%

CAP OVRL = 114.5%

5% 13th HARM

U THD = 5%

CAP OVRL = 120%

5% 13th HARM

U THD = 5%

CAP OVRL = 120%

21M23 GB 21 07 03



NO VOLTAGE RELEASE

This function can prevent damage to the capacitors by disconnecting them from the mains when short power lossess

are detected.

22M23 GB 21 07 03



PROTECTION AGAINST OVER-TEMPERATUREThe 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.

23M23 GB 21 07 03



FOUR-QUADRANT OPERATIONWhen 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.

GGMM

24M23 GB 21 07 03



EASY CURRENT TRANSFORMER SETTINGThe 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.

25M23 GB 21 07 03



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

26M23 GB 21 07 03

1° MODE

2° 3 x

3° 2 x

1° MODE

2° 3 x

3° 2 x



KEYPAD LOCKThe 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 COS setpoint • Changing the operating mode (AUT/MAN) • MAX values clearing

However, all the measurements will be still accessible.

27M23 GB 21 07 03



TTL / RS-232 INTERFACEBy 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.

28M23 GB 21 07 03


DCRK SW SOFTWARE

• Full system monitoring:

- Graphic and numeric measurements display - DCRK status - Virtual front panel

• For each step:- Function

- Status - Reactive power - Operation counter - Hour meter.

TTL / RS-232

COMMUNICATION PORT

29M23 GB 21 07 03


DCRK SW SOFTWAREDCRK SW SOFTWARE

• Measurement of theactual kVar of each capacitor step.

MONITORING THE CAPACITORS EFFICIENCYMONITORING THE CAPACITORS EFFICIENCY

• Counter for the numberof switching operations

of each capacitor step.

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

30M23 GB 21 07 03


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.

31M23 GB 21 07 03


DCRK SW SOFTWARE

• Alarm properties customization

- Alarm enable

- Alarm relay activation

- Step disconnection

- Alarm trip delay.

TTL / RS-232

COMMUNICATION PORT

32M23 GB 21 07 03


DCRK SW SOFTWARE

• Automatic testing of electric panel.

TTL / RS-232

COMMUNICATION PORT

33M23 GB 21 07 03

SPECIAL POWER FACTOR CORRECTION CONTACTORS


Kvar (400V)60

812,5

15 20

30

38

BF

9K

BF

20

K

45

BF

12

K

BF

25

K

BF

40

K

BF

50

K

BF

65

K

BF

80

K

Co

nta

cto

r

10

20

30

40

50

60

34M23 GB 21 07 03

KITS TO ASSEMBLE BF..K CONTACTORS


SPECIAL POWER FACTOR CORRECTION CONTACTORS

35M23 GB 21 07 03

Switch disconnectors


Other products for your power factor correction system

Push buttons and selectors

Digital multimeters

THANK YOU AND GOODBYE

www.LovatoElectric.com

DCRK DIGITAL POWER FACTOR CONTROLLERS. 2 M23 GB 21 07 03 DCRK DIGITAL POWER FACTOR CONTROLLERS...

Documents

Transcript of DCRK DIGITAL POWER FACTOR CONTROLLERS. 2 M23 GB 21 07 03 DCRK DIGITAL POWER FACTOR CONTROLLERS...