Beluk CX plus Manuale utente

Technical documentation Rev. 02

Reactive Power Controller CX plus

Beluk GmbH

Taubenstrasse 1

D-86956 Schongau

Germany

Tel.: +49/(0)8861/2332-0

Fax: +49/(0)8861/2332-22

E-Mail: [email protected]

http://www.beluk.de

REFERENCE MANUAL

REACTIVE POWER CONTROLLER

CX plus

Technical documentation Rev. 02

Reactive Factor Controller CX plus

1Safety notes.................................................................................................................................... 3

2Installation and commissioning....................................................................................................... 5

3Wiring diagrams.............................................................................................................................. 6

3.1 List of options......................................................................................................................... 6

4Connection data.............................................................................................................................. 7

5Commissioning ............................................................................................................................... 9

6Questions during commissioning.................................................................................................. 10

7Indications on the display ............................................................................................................. 15

8Operation:..................................................................................................................................... 19

9Menu CX plus ............................................................................................................................... 21

9.1 Measurement value menu.................................................................................................... 21

9.2 INFO (step database)........................................................................................................... 24

9.3 MANUAL (manual operation: Manually switch steps on and off)......................................... 26

9.4 SETUP (setup menu)........................................................................................................... 28

9.5 Expert SETUP menu CX plus.............................................................................................. 31

9.6 100 Quick START setup ...................................................................................................... 33

9.7 200 Settings Measurement.................................................................................................. 35

9.8 300 Settings control ............................................................................................................. 37

9.9 400 Settings step database.................................................................................................. 41

9.10 600 RESET menu................................................................................................................ 51

9.11 700 Settings MODBUS (communication interface).............................................................. 52

9.12 Alarm memory menu............................................................................................................ 53

10 Technical specifications................................................................................................................ 55

11 Troubleshooting............................................................................................................................ 57

12 Applications................................................................................................................................... 63

12.1 Additional switching output for a step .................................................................................. 63

12.2 Fan activation....................................................................................................................... 64

12.3 Over-temperature switch-off steps....................................................................................... 65

12.4 THD-U / THD-I protection..................................................................................................... 66

12.5 Switching to target Cos 2 via the digital input................................................................... 67

12.6 Suppression of the I-LOW alarm by the digital input ........................................................... 67

12.7 Detection of step power loss (Step Power Loss)................................................................. 69

13 Identification / manual entry of step sizes..................................................................................... 70

13.1 Step identification is activated –Automatic identification of the step size........................... 70

13.2 Problems regarding the step identification........................................................................... 70

13.3 Step identification is deactivated / manual entry of the step sizes ...................................... 71

14 Identification / resetting of defective steps.................................................................................... 72

15 Adding additional steps................................................................................................................. 72

16 Automatic distribution of switching operations to steps................................................................ 73

16.1 Distribution of the switching operations via the switching cycles......................................... 73

16.2 Distribution of the switching operations via the operating hours.......................................... 73

17 Automatic initialisation .................................................................................................................. 73

17.1 Procedure of the automatic initialisation .............................................................................. 74

17.2 Problems during the AI / cancellation of the AI.................................................................... 75

18 Control algorithm........................................................................................................................... 76

18.1 BEST FIT (AUTO)................................................................................................................ 76

18.2 LIFO ..................................................................................................................................... 77

18.3 Combi filter........................................................................................................................... 77

18.4 Progressive .......................................................................................................................... 78

18.5 FIFO..................................................................................................................................... 78

19 Transformer compensation........................................................................................................... 80

19.1 Setting of the offset reactive power:..................................................................................... 80

19.2 Mixed measurement:............................................................................................................ 81

20 Default and customer settings ...................................................................................................... 82

21 Revision list................................................................................................................................... 84

22 Annex............................................................................................................................................ 84

22.1 Setting of phase correction angles depending on the connection....................................... 84

22.2 Connection in case of mixed measurement......................................................................... 84

Technical documentation Rev. 02

Reactive Factor Controller CX plus

1 Safety notes

Read these safety notes and instructions attentively and carefully first. Familiarise yourself with the

device prior to installation, commissioning and operation. The following symbols are used in the

manual and on the device label on the back of the device in order to indicate dangers and problems or

to give specific instructions.

!DANGER

DANGER indicates a dangerous situation which, if not avoided, may cause death or severe

injuries.

!WARNING

WARNING indicates a dangerous situation which, if not avoided, may cause death or severe

injuries.

!CAUTION

CAUTION indicates circumstances which may damage or destroy the device in case of non-

observance, but do not cause injuries.

NOTE: Further information in order to describe special technical features

in a more detailed way.

Technical documentation Rev. 02

Reactive Factor Controller CX plus

!DANGER

During the installation of the CX plus, there is a risk of electric shock. For this reason, installation,

commissioning and maintenance may exclusively be performed by a skilled electrician with the

necessary qualification. A skilled electrician is a person who has the ability, experience and

knowledge necessary for the construction, installation and operation of electrical equipment and

systems and who is trained in the detection and prevention of potential hazards.

During installation, the relevant regulations for the installation of switchgear and for the prevention

of accidents must be observed and complied with. Devices with damaged or open housing or

terminals may not be connected to the mains and must be disconnected immediately.

The current transformer must be short-circuited prior to disconnecting the current measurement

path at the device resp. at the current transformer. Otherwise, there may be a life-threatening

voltage at the connections of the current measurement path resp. of the transformer. In the long

run, the transformer will be destroyed by the high voltage.

Technical documentation Rev. 02

Reactive Factor Controller CX plus

2 Installation and commissioning

1) Before installation, the connection data of the CX plus must be compared with the data of the

supply network and of the installation.

2) The working area must be disconnected from voltage and secured against unauthorised and

unintentional restart. The absence of voltage must be verified with a standardised instrument /

testing device. The voltage-free system must be grounded and short-circuited. Adjacent live

parts must be covered and / or placed behind barriers.

3) The current transformer must be short-circuited. A current transformer that has NOT been

short-circuited generates very high voltages posing a danger to persons and equipment. The

current transformer can thereby be destroyed.

4) Disconnect and remove the old reactive power controller.

5) Plug the CX plus into the switch panel section and fix it with the two mounting brackets.

(Section 138 x 138 mm)

6) Connect the protective conductor at the PE terminal of the metal back of the CX plus.

7) Connect the connecting lines as per the wiring diagram (current transformer: K to power plant,

L to load).

8) Remove the current transformer jumper.

9) Switch on voltage.

10) With a proper connection and correct connection data, the display lights and all symbols are

visualised on the LCD in the course of a display test for 1 second.

11) The current transformer factor must be entered.

12) If necessary, also enter the correct nominal voltage and the voltage transformer factor.

13) Execute the “Automatic initialisation” (AI).

14) If the “Automatic initialisation” was successfully finished, the message AUTO appears on the

display. Control starts after the discharge time lock (default: 75 s).

Technical documentation Rev. 02

Reactive Factor Controller CX plus

3 Wiring diagrams

CX plus-12R

3.1 List of options

Designation

Explanation

CX plus

-06R

6 output / step relay

-12R

12 output / step relay

-MB

Modbus RTU –Connection via RS485 3-wire bus

-m

Signalling / alarm relay with break contact

Technical documentation Rev. 02

Reactive Factor Controller CX plus

4 Connection data

Measuring and supply voltage

Combined voltage measurement and supply

Range: 90 –550 V AC, 45 –65 Hz

Terminals: U1 / U2

A transformer factor can be set when using voltage transformers.

Range 1.0 –350.0

Current measurement

Range: 5 mA –6 A AC, 45 –65 Hz.

The use of x/1 and x/5 transformers is possible.

Terminals: S1 (K) / S2 (L)

Transformer factor adjustable from 1 –9600

Switching outputs relay

only option -xxR

Equipment with 6 (option: -06R) or 12 switching outputs (option: -

12R)

Switching outputs potential-free with common root

Terminals: C / 1 –12

Switching capacity 5 A / 250 V AC

Fan relay

Closes the contact when exceeding the pre-set temperature limit 1.

Terminals: F1 / F2

Switching capacity 5 A/ 250 V AC

The fan relay may be used alternatively as 7th or 13th switching

output for a step.

This function is described in more detail in the chapter

“APPLICATIONS”, paragraph “Additional switching output for

a step”.

Alarm relay

Normally open contact, closed in normal operating condition.

Opens in case of alarm and in case of a failure of the supply

voltage (life contact).

Terminals: AL1 / AL2

Switching capacity 5 A / 250 V AC

Digital input

Digital input either for switching to the second target cos or for

supressing the I-LOW alarm.

Adjustable logic: HIGH or LOW active

Terminals: I1 / I2

Input signal: 90 –250 V AC

Temperature measurement

internal NTC (under the housing cover)

MODBUS interface

only option: -MB

Protocol: MODBUS-RTU

Interface: RS485

Terminals: + / GND / -

TTL interface

Technical documentation Rev. 02

Reactive Factor Controller CX plus

Service interface. For service purposes only.

!CAUTION

Exception: The current transformer factor (SETUP/Ct) must be

entered in order to correctly calculate the measurement values

and to correctly identify the step sizes.

Technical documentation Rev. 02

Reactive Factor Controller CX plus

5 Commissioning

The CX plus is pre-programmed with default values, which enable an operation

almost without further settings, if connected to a 400 V supply network according to

the wiring diagram.

The measurement values of current and power are only displayed, if the current

transformer factor has been set.

NOTE: If the connection of measuring voltage and current results in a phase

between voltage and current not equal to 0° resp. 90°, execute the AUTO

INITIALISATION (AI) first or manually set the phase correction angle (setup menu:

206) correctly. The table with the phase correction angles depending on the

connection of measuring voltage and current can be found in the annex, paragraph

Setting of phase correction angles.

NOTE: The “Automatic initialisation” only identifies the correct phase between

measuring voltage and current. Furthermore, the AI determines which switching

outputs are occupied and which not. Switching outputs which are not occupied are

set to the step type “FOFF”. The step sizes are determined at first via the control in

the normal control mode.

After applying the mains voltage, the message “AUTO” appears on the display and

the currently measured COS is displayed, if measuring voltage and current are

within the tolerance. Normally, the COS should be inductive (display of a small i

behind the first line). From this moment on, the discharge time lock of the capacitors

is active (factory setting: 75 sec.). After the discharge time lock, the CX plus starts

controlling. In the process, the step sizes are determined automatically. Step outputs

which are not occupied are set to the step type “FOFF” (Fix-Off), if the first three

switching processes have been unsuccessful. I.e. the control ignores these steps.

!CAUTION

Exception: The current transformer factor (SETUP/Ct) must be entered in order to correctly

calculate the measurement values and to correctly identify the step sizes.

Technical documentation Rev. 02

Reactive Factor Controller CX plus

6 Questions during commissioning

1) “AUTO”is not displayed control stopped or switched off.

Possible causes:

Manual operation, control has been stopped or switched off in the setup menu.

Current is less than 5 mA, voltage of THD of voltage or current are out of tolerance, temperature is too

high, “Automatic initialisation (AI)” was cancelled with error.

Control is switched off

2) Display “U ALARM”measuring voltage out of tolerance

Possible causes:

Over- or under-voltage in the system, the set nominal voltage and the voltage transformer factor do

not correspond to the system.

Solution:

Check the settings for nominal voltage (SETUP/100/Un) and voltage transformer

(SETUP/100/Pt). The set voltage tolerance range is too small.

Solution:

Check the settings of the tolerance range (SETUP/204).

3) Display “I Lo ALARM”no current

Possible causes:

Connection from the current transformer to the controller is not correct; current transformer jumper is

not removed; transformation ratio of the transformer is too large current is less than 5 mA no

current

4) Display “EXPORT”feeding back of active power

There is no real feeding back, please check the connection of measuring voltage and current (phase,

polarity).

Possible causes:

The set phase correction angle does not correspond to the connection of measuring voltage and

current

Solution:

Correct the connection, execute the “Automatic initialisation (AI)” or manually set the phase

correction angle correctly.

Measuring voltage or current has been connected at a twisted angle of 180° from the direction of

connection (U2 / U1 instead of U1 / U2 resp. S2 / S1 instead of S1 / S2).

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