Beluk CX plus Operating Manual

MB_EN_ACXplus-R_BEL_02

Beluk GmbH

Tel.: [phone]

Taubenstrasse 1

Fax: [phone]

86956 Schongau

[email protected]

Germany

http://www.beluk.de

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CX plus Operating Manual

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General safety notes

Failure to observe the following instructions can lead to serious

injury or death !

During installation, there is a risk of electric shock. For this reason,
electrical devices may only be installed, operated, serviced and maintained
by qualified personnel. A qualified person is one who has the ability,
experience and knowledge necessary for the construction, installation and
operation of electrical equipment and is trained in the detection and
prevention of potential hazards.
During installation and maintenance, the relevant regulations for
installation of switchgear and for preventing accidents must be observed
and complied with.

Devices with damaged or open housings or terminals may not be
connected to the mains and must be disconnected immediately.

After disconnection of the device, wait for 10 minutes until the capacitors
are discharged before removing doors or covers. After that, check to
ensure that the compensation system has been de- energised.

Beluk GmbH assumes no responsibility or liability for injury to persons or
damage to equipment due to improper installation or installation not for
the intended use carried out by qualified personnel.

New features of the CX plus over the BLR- CX

 Modbus: no longer as an external add- on module,

now optionally installed internally.

 Alarm memory: enables the storage of the last 10 alarms
 New alarms: THD I alarm
 I-Low alarm: can be disabled via digital input now:

SETUP/ 500/ 518 → “YES” = I-Low alarm blocked

 Control algorithm: in addition to LIFO, AUTOMATIC (best fit) and

PROGRESSIVE, the FIFO algorithm has now also been implemented

 Outputs: 6 or 12 stages, separate fan relay (can be used as 7

th

/13th

stage)

 Display: to extend the service life of the backlight, it is turned off

60 seconds after last usage.

 Storage U

max

and THD U

max

 Digital input:

Choice between target cosϕ1 and target cosϕ2, signalisation of an
external alarm or to disable the I-Low alarm

 Temperature sensor: NTC now internal.

Installation and commissioning:

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

compared with the data of the supply network and 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 short­circuited. Adjacent live parts must be covered 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 to the PE terminal of the metal

back of the CX plus.

7) Connect the connecting lines as shown in the wiring diagram.

(Current transformer: K [power plant] to S1, L [load] to S2)

8) Remove current transformer jumper.

9) Switch on voltage.

10) With a proper connection and correct connection data, the LCD lights

and the LCD test is active for 1 second.

11) Activation of user-guided initial commissioning “FIrSt SEtUP“ after

confirming “YES“. Afterwards all required parameters are requested
by CX plus. The choice of “NO” requires, that the user implements the
following parameters (12) … 15)) manually.

12) The current transformer factor (Ct) must be entered.

13) The nominal voltage (Un) and the voltage transformer factor (Pt)

must be entered, too.

14) Start the “Automatic initialisation” (AI) or enter the Phaseoffset

(PO) manually.

15) If the „Automatic initialisation” was successfully finished, the

message “AUTO” appears on the LCD.
Control starts after the discharge time lock.

Questions during commissioning:

1) No AUTO display → control stopped

Reasons: Manual operation, control is switched off, temperature is
too high, current is less than 15 mA, voltage or THD of voltage are not
permitted

2) U ALARM display → voltage out of tolerance

Check settings for rated voltage (SETUP/ Un) and
voltage transformer (SETUP/ Pt)

3) I Lo ALARM display → no current flow

Possible causes: Connection from the current transformer to
the controller is not correct; current transformer
jumper is not removed; transformation ratio is too large; no current

4) EXPORT display → feeding back of active power

If there is no real feeding back, connect voltage and
check current (phase polarity)
→ section Incorrect connections/ AI – automatic initialisation

5) Incorrect Cos phi → incorrect connection

Connect voltage and check current (phase, polarity)
→ section Incorrect connections/ AI – automatic initialisation

6) Outputs are switched off again immediately

→ section Incorrect connections/ AI – automatic initialisation

7) Frequent switching of the outputs

→ output of the capacitors first needs to be detected

Display:

INFO: Stage database
AUTO: Automatic operation
MANUAL: Manual operation
SETUP: Settings menu
ALARM: Alarm memory

EXPORT: Feeding back of active power
NT: 2nd target cosϕ is active
ALARM: Flashes if there is an

alarm notification

1st line:

I) cos ϕ/ menu items
II) inductive/ capacitive

2nd line:

I) code of metered and set values
II) metered and set values/ alarm
codes
III) units

Stage display:

Status of the stage (on/ off)
Stage faulty (flashing)

I

II

III

II

I

Operation:

The controller is operated using 4 keys.

Increase values

Select menu items

Exit menus/ Esc
Cursor to the left

Reset alarm (5 sec.)

Opens menus/ Enter
Cursor to the right

Settings

Decrease values

Select menu items

Input parameters:

↑, ↓

→

↑, ↓

→

←

Digit adjust (up/ down)

Move to next position

After the last digit is set, selection of:

- Multiplier k (kilo) or M (Mega)

- Preceding sign i (inductive) or c (capacitive) (flashing of i or c)

Application of values at the end

Abort entry

Main menu:

Select menu items with ↑, ↓, enter the submenu with →

Measurement value display:
(Change with ↑, ↓)

ULL, ULN, I, P, Q, ΔQ, S, THD U, 3.-19. Har. U,
THD I, 3.-19. Har. I, cosϕ, PF, APF, Hz(F), t(°C),

thi (°C), OPh (h), tanϕ, U hi, THD U hi

INFO stage database:
Power and power loss of stages, number of
switching operations, stage type, operating hours.
(→ section INFO stages database)

MANUAL operation:
Intentional switching on and off of
switching outputs.
(→ section MANUAL operation)

SETUP settings menu:
Rated voltage (Un), current transformer (Ct),
voltage transformer (Pt), automatic initialisation
(AI), control on/ off (PFC), target cosϕ 1 (CP1),
switching time (St), stage type (Out)
(→ section SETUP settings menu)

ALARM memory:
Memory buffer shows the last 10 alarms. The most
recent alarm is in the first position.

INFO stage database:

Please note: The current status of the outputs is not displayed.

Browse through stages with ↑, ↓ and select with →. The selected
stage flashes. ↑, ↓ displays the following information:

Current capacitor output
The output relates to Un

Output reduction of the capacitor:

Current output/ nominal output in %

Number of operation cycles

Stage type:
AUTO: Automatically controlled stage
Fon: Fixed stage on
Foff: Fixed stage off
FLty: Stage faulty and disabled

Operation hours:

Shows how many hours the corresponding stage has
already been in operation. Selected stage flashes.

MANUAL operation:

Enter manual operation by pressing → for three seconds.

Browse stages with ↑, ↓. The selected stage is displayed in line 2 as a
number. → switches the stage on or off.

Exit manual operation with ←.

Important information:

- In the menu Manual operation, only stages with stage type AUTO can

be switched. In LIFO mode, FIFO mode and combined filter mode, the
menu Manual operation is disabled. (→ Reference Manual)

- The discharge time lock is also active in manual operation.

(Stages are disabled for a certain time after shutdown)

- The voltage must be within the tolerances, otherwise all stages will

shut down. The respective stages can not be switched in Manual
operation.

- THD U-, THD I- and overtemperature- Alarm block the switching of

stages in manual mode.

- After exiting manual mode, there is automatic control starting from

the set status.

SETUP settings menu:

After opening SETUP, submenu 100 appears. → Open menu 100.
↑, ↓ Menu 200 - 600 & 800, with optional Modbus: 200 - 800

(locked with password → Reference Manual)

Un

Ct

Pt

AI

PFC

CP1

St

OUt

Rated voltage (correct setting is very important)

For voltage monitoring and stages database reference.

Current transformer ratio (must be set)
The value is used for calculation and activation of some
measurement values in the measurement menu.

Voltage transformer ratio
Important as the basis for setting Un

Automatic initialisation
→ section Incorrect connection/ AI – Automatic initialisation

CONTROL ON/ OFF/ HOLD
Switching on, switching off, freezing the control

Target cosϕ 1

Basis for compensation target

Switching time

Defines the speed of the controller

Stage type

Defining stage type: AUTO, Fon, Foff,
Reset faulty stages (FLty)

Incorrect connection/ AI – automatic initialisation:

In case of incorrect connection of the voltage or current path (phase, polarity),
the reactive power controller cannot be operated. Thus, the connection should
be corrected. Since this is not always possible, the CX plus alternatively
provides the following functions:

Automatic initialisation: SETUP/ 100/ AI

The AI switches all outputs on and off several times. This takes a few minutes.
Unused outputs are set to “Foff”.
Stage values are not detected during this process.

After the end of the AI, the function of the controller should be checked.

Requirements for a successful operation of the AI:

- The voltage is within the tolerance

- The current transformer is connected (no simulation)

- Capacitor banks are installed, functional and secured

Possible issues for successful AI:

- Load fluctuations

- Small current signals

Error messages AI/ Abrt:

AI was aborted because no clear result was possible; the control is OFF.

The Phaseoffset can be entered manually as well:

Entering of the correct Phaseoffset SETUP/ 206 → Reference Manual

Stage detection:

During each switching operation, the stage value is determined (except if
this feature is disabled SETUP/ 308 → Reference Manual).
The detected values are updated in the stages database. A loss of capacity
can be determined there.
If a stage does not work in the first three switching operations, it is
automatically assigned to the stage type Foff.

After commissioning, the existing stages have stage type Foff:

Is the current transformer jumper removed?
Is the position of the current transformer correct?
Are all currents and measuring/ operating voltages present?

Faulty stages:

A stage that switches three consecutive times without measurable
success is declared to be faulty. After 24 hours, another test is started.

Stage display: flashes
Status: Flty, stage is disabled

Procedure:
Do individual stage symbols flash during operation mode?

Check fuse, contactor and capacitor output of the corresponding stage.

Acknowledgement in SETUP/ 100/ OUt or restart (interruption of the
measuring/ supply voltage) of the CX plus.

Alarms:

Alarm system settings: SETUP/ 500 → Reference Manual

U

ALARM:

Measuring voltage out of tolerance

I Lo

ALARM:

Measuring current < 5 mA (check I-measuring path)
SETUP/ 500/ 518 → “YES” = I-Low alarm blocked

I Hi

ALARM:

Measuring current > 6 A (transformation ratio of the
built-in current transformer is too small)

PFC

ALARM:

Compensation target unreachable (check system)

HArU

ALARM:

Limit for THD U has been exceeded

HArI

ALARM:

Limit for THD I has been exceeded

StEP/ FLtY

ALARM:

Faulty stages have been detected

SPL/ Nr

ALARM:

Power loss levels below 75 %
Stage number and error code will flash alternately

thi

ALARM:

Overtemperature shutdown of the stages

OPH

ALARM:

Max. operation hours device reached (maintenance)

OPC/ Nr

OPHS/ Nr

ALARM:

Max. operation cycles/ operation hours stages
reached (maintenance)
Stage number and error code will flash alternately

AI/ Abrt

ALARM:

Abort of the automatic initialisation
Re-start the AI when the grid is calmer
or manual setting of the phase offsets
(SETUP/ 206 → Reference Manual)

Factory settings

SETUP/ 100
IMPORTANT SETTINGS

open

Un/ rated voltage

400 V

Ct/ current transformer

1

Pt/ voltage transformer

1

AI/ start Ai

NO

PFC/ control

ON

CP1/ target cosϕ 1

1

St/ switching time

10 s

Out/ stage type

AUTO

SETUP/ 200
MEASUREMENT

locked
201/ rated voltage

400 V

202/ current transformer

1

203/ voltage transformer

1

204/ tolerance voltage

10 %

205/ voltage LL

NO

206/ phase offset

0

207/ start Ai

NO

208/ synchronisation

AUTO

209/ temperature offset

0°C

SETUP/ 300
CONTROL SETTINGS

locked
301/ sensitivity

60 %

302/ target cosϕ1

1.00

303/ target cosϕ2

i 0.95

304/ EXPORT cosϕ2

NO

305/ switching time

10 s

306/ St stage exchange

2 s

307/ active stage exchange

YES

308/ active stage detection

YES

309/ lock faulty stages

YES

310/ control on/off/hold

ON

311/ control algorithm

1

312/ offset reactive power

0 var

313/ asymmetry factor

1

314/ Qcap stages Off

NO

315/ stage distribution

NO

316/ detect. def. stages

YES

SETUP/ 400
STAGE DATABASE

locked

401/ discharge time lock

75 s

402/ nominal stage value

c 3 var

403/ stage type

AUTO

404/ operation cycles

0

405/ stage operation h

0 h

406/ fan relay as stage 13

NO

Factory settings

SETUP/ 500
ALARM SETTINGS

locked
501/ manual reset

NO

502/ THD U Limit

20 %

503/ THD stages off

NO

504/ delay of harm. alarm

60 s

505/ I= 0 freeze controller

NO

506/ maintenance alarm

NO

507/ operating cycles limit

500 k

508/ limit OPh

65.5 kh

509/ limit OPh stage

65.5 kh

510/ THD I limit

50 %

511/ DI= Hi active

YES

512/ Temp1 limit

30 °C

513/ Temp2 limit

55 °C

514/ control alarm

NO

515/ faulty stages alarm

NO

516/ power loss

NO

517/ alarm illumination

NO

518/ digital input function

CP 2

519/ info lock I-Low

NO

520/ DI-Alarm switch off
stages

NO

521/ I-Low-Alarm

YES

522/ delay I-High-Alarm

10 s

523/ switch off interval

60 s

SETUP/ 600
RESET

locked

601/ factory settings

602/ stages database

603/ operating hours

604/ average power

factor

605/ max. temperature

606/ alarm

607/ firmware info

608/ password change

242

SETUP/ 700
MODBUS SETTINGS

locked

701/ baud rate

19200

702/ parity

EVEN

703/ address

1

SETUP/ 800
Backlight Options

locked

801/ backlight
Commissioning-Mode

NO

802/ delay time

0,25 h

Technical specifications:

Voltage:

90- 550 V, 1 ph., 50/60 Hz, 6 VA

Current:

5 mA- 6 A, 1 ph., <1 VA,

Switching outputs:

Relay, NO contact,
common contact supply: max. 10 A 250 V
AC/ 5 A, 400 V AC/ 1 A

Digital input:

90- 250 V AC

Temperature measurement:

NTC, internal

Signal contact:

Pot.- free relay, normally closed contact,
48 V DC/ 1 A, 250 V AC/ 5 A, 400 V AC/ 1 A
Optional NO/ NC

Fan control:

Pot.- free relay,
48 V DC/ 1 A, 250 V AC/ 5 A, 400 V AC/ 1 A

Interface:

Optional: RS485 Modbus

Ambient temperature:

Operation: -20 °C to 70 °C
Storage: -40 °C to 85 °C

Humidity:

0 %- 95 %, condensing not allowed

Overvoltage category:

300 V LN/ 519 V LL CAT III
or 550 V/ CAT II

Connection:

Screw terminals, pluggable

Housing:

Front: Instrument housing, plastic
Back: Metal

Protection type:

Front: IP41, Back: IP20

Technical specifications:

Weight:

Approx. 0.6 kg

Dimensions:

Housing: 144 x 144 x 58 mm (WxHxD)
Cut-out: 138 (+0.5) x 138 (+0.5) mm

Alarm memory:

Storage of the last 10 alarms

Standards:

IEC 61010- 1
IEC 61000 6- 2
IEC 61000 6- 4: level B
IEC 61326- 1
UL 61010

Conformity:

CE, NRTL(UL), c NRTL (cUL), EAC

Algorithms:

AUTOMATIC (best fit)
LIFO
FIFO
PROGRESSIVE
Combined filter

Max. operating height:

≤ 2000 m

Max. contamination level:

2