janitza Prophi Operating Instructions Manual

Key 3

Key 2

Key 1

www.janitza.com

Doc no. 1.020.009.m

Serie II

Prog

Janitza electronics GmbH
Vor dem Polstück 6
D-35633 Lahnau
Support Tel. [phone]
Fax [phone]
e-mail: [e-mail]
Internet: http://www.janitza.com

w

Reactive Power Controller

Operating instructions

Brief instructions see last page

Peak value
Fix stages
Password
Capacitive
Required capacitive
power
Cosinus ϕ
Inductive
Automatic mode
Harmonics
Manual mode
Target cos(phi1)
Target cos(phi2)

Lowest value
Capacitive stage active
Alarm output active

Expanded programming
Number of stages
Stage ratio
Power of 1st stage
Learning of configuration
CT ratio

cap
cos

ϕϕ

ϕϕ

ϕ Qc

ind

1 2 3 4 5 6 7 8 9 10 11 12 Error

ϕϕ

ϕϕ

ϕ1

ϕϕ

ϕϕ

ϕ2 learn 1:1... Prog

Article no. 33.03.027

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Reactive Power Controller

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Expanded programming 25

Fix stages 25
Discharge time 26
Disconnection pause 26
Power station service 27
Stage power 28
Choke degree 28
Voltage transformer ratio 29
Harmonic thresholds 30
Switching frequency 31
Alarm output 32

Alarm call 32
Give a receipt for alarms 32
Lower voltage (1) 33
Overvoltage (2) 33
Underscoring of the measurement current (3) 33
Exceeding of measuring current (4) 33
Insuff icient capacitor output (5) 33
Supply of real power (6) 33
Harmonic thresholds (7) 33
Overtemperature (8) 33

Averaging time for the mean value cos(phi) 34
Averaging time of reactive power 34
Ventilator control 35
Ventilation control 35

Upper temperature limit 35
Lower temperature limit 35
Switching output 35

Overtemperature disconnection 37

Upper temperature limit 37
Lower temperature limit 37
Pause time 37

Indication in manual mode 38
Password 39
Program password 39
Enter password 39
Change password 39
Contrast 40
Reset programming 41
Connection conf iguration 42

Correction angle 42

Software release 43
Serial number 43
Serial interface (Option) 44

Device address 44
Transmission protocol 44
Baud rate 45
Modbus RTU 45
Profibus DP V0 45
Table Modbus 46
Table Profibus 47

Contents

Receipt Control 4

Meaning of the symbols 4

Hints for usage 4
Product description 5

Intended use 5
Data protection 5
Hints for maintenance 5

Repairing and calibration 5
Front foil 5
Waste management 5

Funktional description 6

Measurement 6
Switching of capacitor stages 6
Switching outputs 6
Net return 6

Hints for installation 8

Mounting place 8
Measurement and supply voltage 8

Sum current measurement 9
Current measurement 9

Installation and putting into service 10

Measurement and supply voltage 10
Current measurement 11
Real power 11
Switching outputs 12

Transistor outputs 12
Target-cos(phi) changeover 13
Alarm output 13
Check alarm output 13

RS485 Interface (Option) 14

Transmission protocols 14
Bus structure 14
Shielding 14
Cable length 14
Terminal resistors 14

Removal of errors 15
Service 16

Display and use 17

Automatic mode 17
Manual mode 17
Key functions 18

Standard programming 19

Target cos(phi) 19
Current transformer ratio 20
Learning of the configuration 21
Stage power 22
Stage ratio 22
Switching outputs 23
Delete peak and lowest values 24

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Display overview 48

Measured value indications 48
Display in standard programming 50
Display in expanded programming 51

Configuration data 53

Setting range 53
Manufacturer's presetting 53

Technical data 54

Ambient conditions 54
Inputs and outputs 54
Measurement 54
Measurement accuracy 54
Back Side 55
Side view 55

Short manual 56

All rights reserved. No part of this manual may be re­produced or duplicated without the written permission
of the author. Any contraventions are punishable and
will be prosecuted with all legal means.

No liability can be taken for the faultless condition of
the manual or damage caused by the use of it. As fail­ures cannot be avoided completely, we shall be very
grateful for any advice. We will try to remove any fail­ures as soon as possible. The mentioned software and
hardware descriptions are registered trademarks in the
most cases and are subjected to the regulations by law.
All registered trademarks are property of the correspond­ing companies and are fully recognized by us.

Page 4

Reactive Power Controller

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Receipt Control

In order to ensure a perfect and safe use of the device, a
proper transport, expert storage, erection and mounting
and careful usage and maintenance are required. When
it may be supposed, that a safe operation is no longer
possible, the device has to be put out of service and be
protected against unintentional putting into service.

A safe operation can no longer be assumed, when the
device

• shows visible damage,
 does not work in spite of intact net supply,
 has been exposed to disadvantageous conditions for a
longer time (e.g. storage out of the allowed climate
without adaption to the room climate, dew etc.) or trans­port use (e.g. falling from great height, even without
visible damage).

Please test the contents of delivery for completion, be­fore starting the installation of the device. All delivered
options are listed on the delivery papers.
In the attached description doc. no.: 1.020.030.x all de­livery types and options for the reactive power control­ler Prophi are listed.

Hints for usage

Safe and failure free operation can only be granted,
when the device is operated according to this manual!

This device may be put into service and used by quali­fied personnel according to the safety regulations and
instructions only. Please mind the additional legal and
safety regulations for the respective application.

Qualified personnel are persons, familiar with erection, mounting,
putting into service and usage of the product and having the qualifi­cations such as:

 education or instruction / entitlement to switch, re­lease, ground or characterize current circuits and de­vices according to the standards of safety techniques.

 education or instruction in the care and usage of suit­able safety equipment according to the standards of
safety techniques.

Warning of dangerous electrical voltage.

This symbol shall warn you of possible dangers, which can occur during maintenance, putting into service
and while usage.

Protective wire connection

c
m

Meaning of the symbols

Attention!
This manual also describes options and
types, which were not delivered and there­fore, do not belong to the contents of deliv­ery.

m

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Reactive Power Controller

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Product description

Intended use

The reactive power controller Prophi together with ex­ternal capacitor stages, serves for step by step control­ling of the phase shift angle cos(phi) in 50/60Hz low
voltage networks. Depending on the type of the reac­tive power controllers Prophi, contactors or semi con­ductor switches can be controlled directly.
Additionally, the following electrical quantities are meas­ured and indicated:

- Voltage L2-L3,

- Current in L1,

- Frequency,

- Sum real power (Consumption/supply),

- Sum reactive power (ind./cap.),

- uneven current harmonic waves 1. - 19. in %,

- uneven voltage harmonic waves 1. - 19. in %.
The harmonic contents are related to the rated voltage
or rated current.

The connection is carried out on the back side via touch
proof spring power terminals.
Measurement and supply voltage are taken from the
measurement voltage and must be connected to the
building installation via a separation (switch or power
switch) and an overcurrent protection (6,3A).
The current measurement is carried out via a ../5A or
../1A current transformer in one outer conductor.

The relay outputs are suitable for contactor control, the
transistor outputs are provided for the control of fast
switching thyristor modules, switching at zero crossing.

Hints for maintenance

Before delivery the device is tested in various safety
checks and marked with a seal. If the device is opened,
these checks must be repeated.
There is no guarantee for devices, which are opened
out of the manufacturing works.

Repairing and calibration

Repairing and calibration work can be carried out in the
manufacturing works only.

Front foil

The cleaning of the front foil must be done with a soft
cloth using a common cleansing agent. Acid or acidic
agents may not be used for cleaning.

Waste management

The device can be disposed as electronical waste ac­cording to the legal regulations and recycled.

Data protection

The data protection is carried out in a none volatile
memory (EEPROM).
Changed programming data are saved immediately.

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Switching of capacitor stages

Prophi calculates the required reactive power to reach
the set target-cos(phi) from the current from one outer
conductor and the voltage between two outer conduc­tors. If the cos(phi) deviates from target cos(phi), exter­nal capacitor stages or transistor outputs are switched
on or off.
In automatic mode the capacitor stages are switched in
or off, when the required reactive power is higher or
equal to the smallest stage power.
If the power of the first capacitor stage is three times as
high as the measured real power, all capacitor stages
are switched off.

Switching outputs

Depending on the variety of Prophi, relay or transistor
outputs serve as switching outputs.
The relay outputs are suitable for controlling contactors
and the transistor outputs can switch thyristor modules,
that switch in zero crossing of voltage.
For relay outputs the time between two connections or
disconnections is set to two seconds. Transistor outputs
have no limitation of the switching period.

Net return

After net return, the set discharge time runs for the
relay outputs. The transistor outputs do not mention the
discharge time.

Funktional description

Measurement

The measurement is suited for 3 phase systems with or
without neutral conductor for frequencies of 50Hz or
60Hz. The electronical measurement system records and
digitalizes the effective values of voltage between L2
and L3 (L-N Option) and the current in L1.
In each second several snap check measurements are
carried out. As the current is only measured in one
outer conductor, and the voltage only between two outer
conductors, the measured values, which are related to
all three outer conductors, are exact for equal loaded
outer conductors only.
The following electrical quantities are calculated:

Current and current harmonics
Voltage and voltage harmonics
Real power, sum
Apparent power,sum
Reactive power, sum
Reactive power for each stage
Reactive current for each stage
Cos(phi),
Net frequency.

The following information can be indicated:

Number of switchings of each stage,
total connection time of each stage and

the inner temperature.
Prophi measures the frequency of the measurement and
supply voltage and shows the average over 10 seconds.

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Diagr.: Connection example, power factor controller with measurement and supply voltage L2-L3,12 relais outputs,
target cos(phi) changeover and alarm output.

Prophi

Diagr.: Connection example, power factor controller with measurement and supply voltage L-N,12 relais outputs,
target cos(phi) changeover and alarm output.

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Reactive Power Controller

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Hints for installation

Mounting place

The reactive power controller Prophi is suited for mount­ing and operation in reactive power compensation sys­tems.

The connection is carried out on the back side via touch
proof spring power terminals.

Measurement and supply voltage

The measurement is suited for 3 phase systems with or
without neutral conductor. Measurement and supply
voltage are taken from the measurement voltage and
must be connected to the building installation via a
separation (switch or power switch) and an overcurrent
protection (2A...10A).

The reactive power controller measures and supervises
the voltage between two outer conductors. If one of
those two fails, the reactive power controller gets no
more measurement and operating voltage, and switches
on the capacitive stages after net return according to
the programmed times.
If the third outer conductor is missing, this will not be
recognized by the reactive power controller. If the con­tactors are supplied by this outer conductor, the contac­tors can attract simultaneously and without considera­tion of the discharge time after net return.

Falsch
False

Einspeisung
Supply

Verbraucher
Consumer

EVU­Messung
Electricity­Meter

Prophi

Einspeisung
Supply

Verbraucher
Consumer

EVU­Messung
Electricity­Meter

Prophi

Falsch
False

Einspeisung
Supply

EVU­Messung
Electricity­Meter

Prophi

Falsch
False

Verbraucher
Consumer

Richtig
Correct

Einspeisung
Supply

Verbraucher
Consumer

EVU­Messung
Electricity­Meter

Prophi

Attention!
The operating voltage for the contactors
should be taken from an outer conductor con­nected to the reactive power controller.

m

Abb.: Anschluss der Mess- und Hilfsspannung zwischen
L2-L3 und der Strommessung über Stromwandlers.

Prophi

Messung

Measurement

0,01 .. 5A

L/L

siehe Typenschild

see type label

../5(1)A

L1
L2
L3

PE

k l

2 .. 10A

Verbraucher
Consumer

kl L2L3

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Reactive Power Controller

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Diagr. Measurement with Amperemeter in series

Diagr. Measurement via sum current transformers

Current measurement

The current measurement is carried out via ../5A or ../
1A current transformers.
If the current must be measured with an Amperemeter
additionally to Prophi, it must be connected in series.

Sum current measurement

If Prophi is connected to a sum current transformer, the
total transformation ratio must be programmed.

Attention!

For unequal load of the outer conductors, the
current should be measured in the outer con­ductor, which is loaded most heavily.

Verbraucher 1

Consumer 1

Verbraucher 2

Consumer 2

Einspeisung 1

Supply 1

Einspeisung 2

Supply 2

Prophi

L l

k K

l L

K k

AK AL BK BL

kl

kl

Verbraucher

Consumer

Prophi

Einspeisung

Supply

L l

K k

A

k

l

m

Abb.: Anschluss der Mess- und Hilfsspannung zwischen
L1-N und der Strommessung über Stromwandlers.

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Installation and putting into service

Measurement and supply voltage

The controller Prophi can be delivered in two connec­tion varieties for the measurement and supply voltage.
In the version measurement L-L, the measurement and
supply voltage must be taken from two outer conduc­tors. In version measurement L-N, the measurement
and supply voltage must be taken between outer con­ductor L and neutral N.

Before connection, please ensure, that the local net con­ditions match the data on type plate. The range of the
measurement and supply voltage is given by the type
plate and is connected via a fuse (2…10A, time lag type)

Diagr.: Connection of measurement and supply voltage
(L2-L3) and current transformer.

c

c

Prophi

Messung

Measurement

0,01 .. 5A

L/L

siehe Typenschild

see type label

../5(1)A

L1
L2
L3

PE

k l

2 .. 10A

Verbraucher
Consumer

kl L2L3

Diagr.: Connection of measurement and supply voltage
(L1-N) and current transformer.

If the measurement and supply voltage is within the
allowed range, Prophi indicates the voltage on the ter­minal.
While measuring via voltage transformers, the voltage
transformer ratio must be programmed.

Attention!

The measurement and supply voltage must
come from the low voltage net, which is su­pervised.

The connected measurement and supply voltage may
not exceed the voltage, mentioned on type plate for
more than 10% or underscore for more than 15%.
To ensure, that the connected measurement and supply
voltage is within the allowed range, please check the
voltage at the terminal with a voltmeter.

Attention!

Voltage, which is out of the indicated range
on type plate can destroy the instrument.

c

Attention!

The operating voltage for the contactors should
be received from an outer conductor connected
to the controller.

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Current measurement

The current transformer is connected to the clamps k
and l (/5A or /1A) from the outer conductor L1.
Please ensure during the installation of the current trans­former, that the current transformer is passed by the
consumer current but not by the compensation current.
The current can be measured by an Amperemeter to
compare it with the current indicated by Prophi to check.
Please note, that the factory's presettings of the current
transformer ratio is set to 10 and must be adapted to the
existing current transformer.
If you should short-circuit the current transformer, the
indicated value on Prophi must decrease to 0A.

Examples for the setting of the current transformer
Example 1
Current transformer 200A/5A
Set Prophi to 40

Example 2
Current transformer 500A/1A
Set Prophi to 500

Example 3
Sum current transformer 1000A+1000A/1A
Set Prophi to 2000

Attention!

For unequal load of the outer conductors, the
current should be measured in the outer con­ductor, which is loaded most heavily.

Real power

If current and voltage are connected to Prophi accord­ing to the connection diagram, a positive real power is
displayed in case of real power consumption. Real power
with a negative sign in the indication points to the sup­ply of real power or an error of connection.
Possible error:

- Voltage and current are measured in the wrong outer
conductor.

- The current transformer clamps (k-l) are exchanged.

m

m

Attention!

None earthed current transformer clamps can
be live.

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Switching outputs

The reactive power controller Prophi can be equipped
with up to 12 switching outputs. The switching outputs
can be equipped either with relay or transistor outputs.
If a device is equipped with relay or transistor outputs
it is not shown on display. The equipment can be seen
in the connection diagram on the back of Prophi.

Relay outputs
Capacitor contactors can be connected to the relay out­puts according to the connection example "Relay out­puts".

Transistor outputs

Semi conductor switches, switching at zero crossing,
must be connected to the transistor outputs of the reac­tive power controller.
The transistor outputs switch the voltage of an external
d.c. net supply to the semiconductor switches.

Check switching outputs
Please switch in the capacitor stages in manual mode:
The inductive reactive power is decreased by the power
of the respective capacitor stage.
Please switch off the capacitor stages in manual mode:
The inductive reactive power is increased by the power
of the respective capacitor stage.

Possibility of errors:
The outputs do not switch

- Relay output defective.

- Transistor output defective.

The change of the reactive power is faulty

- The current is measured incorrectly.

- A wrong current transformer ratio is set.

- The current is measured in the wrong outer
conductor.

- The voltage is measured in the wrong outer
conductors.

- The current transformer clamps k-l are exchanged.

The reactive power does not change

- The current transformer is installed at the wrong
place.

- Switching outputs faulty.

- The wrong control voltage is connected to the
switching outputs.

Diagr.: Connection example "Transistor outputs"

Attention !
For devices with relay or transistor outputs,
there are different control voltages applied
to the switching outputs.

15-30VDC

F0,2A

Prophi

1

2

3

C1

Diagr.:Connection example "Relay outputs"

Attention!

The relai and transistor outputs are live.

c

m

Prophi

C1

1

2..10A

max. 250V

2

3

Attention!

If a switching frequency of 50Hz is programmed
for the transistor outputs, the serial interface
does not work!

m

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Target-cos(phi) changeover

Via the input target-cos(phi) changeover it can be
changed over between target-cos(phi1) and target-
cos(phi2).
If there is no voltage at the input, the target-cos(phi1)
is active. If there is a 85 bis 265V AC connected to the
input, the target-cos(phi2) is active.

In the standard display (please see example), apart from
the active channels and the actual cos(phi) also the ac­tive target-cos(phi) is indicated.

Target-cos(phi1) is active.

cos

ϕϕ

ϕϕ

ϕ

ind

1 2 3

ϕ1ϕ1

ϕ1ϕ1

ϕ1

Actual cos(phi) mean
value

Target-cos(phi2) is active.

cos

ϕϕ

ϕϕ

ϕ

ind

1 2 3

ϕ2ϕ2

ϕ2ϕ2

ϕ2

Actual cos(phi) mean
value

Diagr.: Connection diagram target-cos(phi) changeover

85 - 250V AC

15

16

ϕ1

ϕ2

Prophi

Alarm output

The alarm relay attracts in undisturbed operation, and
the contact of the alarm output is closed. If a distur­bance occurs, the alarm relay releases and the contact is
opened. Various events can be assigned to the alarm
output via OR-logic interconnections. Each event is as­signed to an alarm number, an alarm delay and alarm
duration.

Check alarm output

If there is no alarm, the alarm relay attracts immedi­ately. In order to trigger off an alarm, the threshold for
overtemperature can be set to zero, for instance, and
the alarm relay releases immediately.

Diagr.: Connection diagram alarm output

13

14

T6,3A

max. 250V

Error

Prog

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RS485 Interface (Option)

Transmission protocols

Two tran smiss ion pr otoco ls are availa ble fo r the c onnec ­tion to an existing field bus system:

0 - Modbus RTU (Slave) and

1 - Profibus DP V0 (Slave) .

Wi th Mod bus pro tocol you can have ac cess t o the da ta of
table 1, and with Profibus protocol you can have access
to the data of table 2.

Bus structure

All devices are connected in bus structure (line). In one
segment up to 32 participiants can be assembled. At the
end and the beginning of each segment, the cable must
be terminated by resistors. In

Prophi

you can activate
these resistors with two plug-ins.
For more than 32 participiants you must use a repeater
(line amplifier) to connect the single segments.

Shielding

For connections via RS485 interface, you need a pro­tected and twisted cable. To achieve a sufficient protec­tion result, the shielding must be connected at both ends
extensively to the housing or parts of the cabinet.

Cable specifications
The maximum cable length depends on cable type and
transmission speed. We recommend cable type A.

Cable parameter Type A Typ B

Impedance 135-165Ohm 100-130Ohm

(f = 3-20MHz) (f > 100kHz)
Capacity < 30pF/m < 60pF/m
Resistance < 110 Ohm/km ­Diameter >= 0,34mm2 >= 0,22mm2

(AWG22) (AWG24)

Cable length

The following table shows the maximum cable length in
meters (m) for various transmission speed
.

Baud rate (kbit/s)
Cable type 9.6 19.2 93.75 187.5 500 1500

Type A 1200 1200 1200 1000 400 200
Type B 1200 1200 1200 600 200 70

Terminal resistors

If

Prophi

is connected to the end of the bus cable, the
bus cable must be terminated at this point with resistors.
The required resistors are integrated within the

Prophi

and are activated in position ON.

Diagr. Connection RS485 interface

1

0200740

392R 221R 392R

23

22

21

A

B

+5V

OFFON

GND

GND

Termination

Prophi

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Removal of errors

Possible cause

- Wrong measurement and supply voltage
connected.

- Prefuse (10A time-lag type) has triggered.

- Current measurement in the wrong outer
conductor.

- Wrong current transformer ratio.

- Current out of measuring range.

- Current transformer clamps are bridged.

- One current transformer line is interrupted.

- A current measuring device is connected
parallely.

- Wrong voltage transformer ratio.

- Uneven load of the outer conductors.

- Wrong voltage transformer ratio.

- Voltage and/or current are measured incor­rectly.

- Voltage and current are measured in the
wrong outer conductors.

- Voltage and/or current are measured incor­rectly.

- The current transformer connection (k-l) is
exchanged.

The measuring current is smaller but 10mA.
The measuring voltage is interrupted.
The current transformer clamps are bridged.

- Voltage is measured incorrectly.

- Current is measured incorrectly.

- Real power is measured incorrectly.

The current transformer is installed after the
measurement of the energy supplier.

Current and voltage are connected in-cor­rectly.

The capacitor current is not detected by the
current transformer.
Capacitive stages are faulty.

The measurement and operating voltage is
exceeded by more than 10%.

Current measurement in wrong phase.
L1 and L3 are exchanged.

The device is defective.

Remedy

Please check measurement and sup­ply voltage.

Please check current measurement.

Please check voltage measurement.

Please check current and voltage
measurement.

Please check current and voltage
measurement.

Please check current measurement.

Please check current and voltage
measurement.

Check and correct connection.
(Please see hints for installation)

Check and correct connection.
(Please see hints for installation)

Check and correct mounting posi­tion of the current transformer.
Check capacitive stages.

Check measurement and operating
voltage.

Check measurement and operating
voltage.

Send the device to the manufacturer
with an exact description of the error.

Description of the error

No indication.

Current
too little / too high.

Voltage
L2-L3 too little / too high.

Real power
too little / too high.

Real power supply/con­sumption exchanged.

Cos(phi) = 0.00

Cos(phi)
too high / too little.

Cos(phi) does not change,
although all capacitor
stages were switched in.

Cos(phi) is indicated ca­pacitive on Prophi, but,
nevertheless, the reactive
power meter measures re­active power.
Prophi only connects
stages, but does not dis­connect.

The outputs can only be
disconnected.

Prophi shows a cos(phi) of
0,2 - 0,4 capacitive.

It does not work.

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Service

If certain questions appear, which are not mentioned in
this handbook, please call us directly.
To be able to support you, we require the following
information:

- Device description (see type plate),

- Serial number (see type plate),

- Software Release,

- Measurement and supply voltage and

- Exact description of the error.

You can reach us:
Monday to Thursday from 07:00 to 15:00
and on Friday from 07:00 to 12:00

Janitza electronics GmbH
Vor dem Polstück 1
D-35633 Lahnau
Support:

Tel. [phone]

Fax [phone]
e-mail: [e-mail]

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ϕ1 ϕ2ϕ1 ϕ2

ϕ1 ϕ2ϕ1 ϕ2

ϕ1 ϕ2 learn 1:1... Prog

Display and use

In the front side of Prophi there is a digital indication
and three keys, with which you can question data and
program the device.
If you are in automatical mode, you can change be­tween the operating modes using key 1:

automatic mode,
manual mode,
standard programming and
expanded programming

automatic mode
manual mode
standard programming
expanded programming

In standard programming often needed settings are car­ried out such as current transformer ratio or the number
of stages.
In expanded programming those settings are carried out,
which are used not as often, such as discharge time or
choke degree.

To reach the expanded programming from automatic
mode, leaf through the standard programming using key
1 until the symbol "Prog" appears. Confirm selection
with key 2, and you are in expanded programming.

Automatic mode

Automatic mode is marked by the symbol .
In automatic mode, there is:

- the switching condition of capacitive stages,

- the actual value of cos(phi) indicated,

- Connection and disconnection of capacitive stages,

- all 15 minutes saving of
peak and lowest values,
number of switchings of the capacitor stages and
the switching times of capacitor stages.

- Indication of measured values using key 2 and 3.

There are three possibilities to reach automatic mode:

- after net return,

- pressing key 1 for about 2 seconds,

- pressing no key in programming mode for
1 minute.

Automatic mode

cos

ϕϕ

ϕϕ

ϕ

ind

1 2 3

ϕ1ϕ1

ϕ1ϕ1

ϕ1

Actual value cos(phi)

Manual mode

In manual mode, you can switch in capacitor stages
using key 3, and switch off capacitor stages using key

2. The time between two switchings is only limited by

the programmed discharge time. If one stage shall be
connected in manual mode and a discharge time is run­ning, the number and capacitor stage is flashing.
If no capacitors are switched in manual mode, an
automatical jumpback to automatical mode is carried
out after 15 minutes.

Manual mode
Reactive power

Connected stages

k VAr

ind

1 2 3 4 5