Kuhse KEA 252 PA User manual

______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
Operating instructions
Automatic start/stop system for parallel systems
for product: KEA 252 PA
File: BA_KEA 252 PA_EN_Ver 2016-07-01 (replaces version 2014-09-22)
__________________________________________________________________
1. Use and basic operation
The KEA 252 PA automatic system is used in systems in which several gensets are operated in parallel. It can
be used as a peak load genset, CHP module, for emergency power systems, for pure standalone operation or
all resulting combinations. It is designed so that genset fields that equipped with this automatic system can be
easily cascaded. A central controller must take over the activating of any mains and coupling switched and the
selection of gensets.
The synchronisation unit, the power and cos φ controller, the load distribution in standalone operation and the
power failure protection in accordance with VDE-AR-N 4105 and the voltage monitor (from Version 8) according
to E VDE-AR-N 4120 during the mains parallel operation are included. All functions and displays required in
VDE 0108, including the drag indicator display, are fulfilled by this automatic system. Also, the requirements for
the control of a diesel motor have been fulfilled in accordance with VdS 2100-22.
The function of the output relays and the parameters can be set with a PC.
Because the KEA 252 has the same dimensions and fastenings as its predecessor, replacement is simple.
Four dedicated operating messages and four programmable operating displays can be labelled by re-
placeable paper strips and are indicated by LEDs. All other alarms and all actual and reference values are
shown on the display. The illuminated display shows two lines with up to 16 characters with a character height
of 10 mm so that it can be read from a greater distance.
The parameterisation can be carried out via the keys and the display or via the serial interface (LWL or USB
–automatic switching) with the parameterisation program PARAWIN.
Two CAN bus interfaces are available for coupling to a ZLT and to a motor management system. However, the
protocol for the motor management system must be known and implemented.
The automatic system can be cost-effectively integrated in a communication system (KUHSE TELEMON) via the
public telephone or GSM mains by plugging in a modem.
Important note! The functions for the mains parallel operation deviate in part from the previous model KEA 102
PA because of compliance with the new VDE regulation.
GEN.VOLTAGE [V]
231 233 229

Operating instructions for KEA 252 PA 2 / 25 File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
2. Revision history
Version
Changed
15-03-16
First edition
01-07-2016
Change the header
3. Content
1. Use and basic operation........................................................................................................................ 1
2. Revision history...................................................................................................................................... 2
3. Content .................................................................................................................................................. 2
4. Warnings................................................................................................................................................ 4
4.1. Regulations and instructions.......................................................................................................... 4
4.2. Installation and commissioning...................................................................................................... 4
4.3. Connections................................................................................................................................... 4
4.4. Battery and supply voltage ............................................................................................................ 4
4.5. Coils............................................................................................................................................... 4
5. Functions ............................................................................................................................................... 5
6. Function differences to the preceding model KEA 102 PA.................................................................... 5
7. Automatic operation............................................................................................................................... 5
7.1. Back synchronisation..................................................................................................................... 5
7.2. Peak load operation....................................................................................................................... 5
8. Test operation........................................................................................................................................ 6
9. Basic operation of automatic system..................................................................................................... 6
9.1. Operation of the display................................................................................................................. 6
9.2. Display contrast setting.................................................................................................................. 6
10. Parameterisation.................................................................................................................................... 7
11. Display and control elements................................................................................................................. 8
11.1. Monitoring on ................................................................................................................................. 8
11.2. Automatic system locked............................................................................................................... 8
11.3. Start control.................................................................................................................................... 8
11.4. Fault............................................................................................................................................... 9
11.5. Four programmable displays ......................................................................................................... 9
11.6. Mimic diagram / Voltage monitor ................................................................................................... 9
11.7. Keys for operating mode................................................................................................................ 9
11.8. Start key......................................................................................................................................... 9
11.9. LED Test button............................................................................................................................. 9
11.10. Alarm Off button........................................................................................................................... 10
12. Operating modes ................................................................................................................................. 10
12.1. Controlling the auxiliary drives..................................................................................................... 10
12.2. Off operating mode...................................................................................................................... 10
12.3. Manual operating mode............................................................................................................... 10
12.3.1. Manual speed adjustment........................................................................................................ 10
12.3.2. Manual voltage adjustment...................................................................................................... 10
12.4. Auto operating mode.................................................................................................................... 11
12.4.1. Peak load without mains failure control function ..................................................................... 11
12.4.2. Standalone operation without peak load.................................................................................. 11

Operating instructions for KEA 252 PA 3 / 25 File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
12.4.3. Peak load with mains failure control function .......................................................................... 11
12.4.4. Sprinkler prompt....................................................................................................................... 11
12.5. Test operating mode.................................................................................................................... 11
12.5.1. General.................................................................................................................................... 11
12.5.2. Generator operation................................................................................................................. 11
12.6. Sprinkler operation....................................................................................................................... 12
13. Alarm messages.................................................................................................................................. 12
13.1. Display and acknowledgement of alarms.................................................................................... 12
13.2. Description of the alarms............................................................................................................. 13
13.2.1. Engine does not switch off....................................................................................................... 13
13.2.2. False start................................................................................................................................ 13
13.2.3. Motor fault................................................................................................................................ 13
13.2.4. Overspeed ............................................................................................................................... 13
13.2.5. Alarms 13 and 14..................................................................................................................... 13
13.2.6. Battery voltage monitor............................................................................................................ 13
13.2.7. Analogue input alarms............................................................................................................. 13
13.2.8. Generator circuit breaker tripped............................................................................................. 13
13.2.9. Generator switch-off impeded.................................................................................................. 13
13.2.10. Alarms of the voltage monitor.................................................................................................. 13
13.2.11. Monitoring the flows................................................................................................................. 13
13.2.12. Synchronisation fault ............................................................................................................... 14
13.2.13. Power controller defective ....................................................................................................... 14
13.2.14. Cos φ controller defective........................................................................................................ 14
13.2.15. Reverse power......................................................................................................................... 14
13.2.16. Maintenance interval reached.................................................................................................. 14
13.2.17. Maintenance interval exceeded............................................................................................... 14
14. Display of the actual values................................................................................................................. 15
15. Further functions.................................................................................................................................. 16
15.1. Frequency controller in standalone operation ............................................................................. 16
15.2. Voltage controller in standalone operation.................................................................................. 16
15.3.Power controller........................................................................................................................... 17
15.4. Cos φ controller ........................................................................................................................... 17
15.5. Synchronisation unit .................................................................................................................... 17
15.6. Quick stop (Emergency Stop/Emergency Off)............................................................................. 17
15.7.Start program............................................................................................................................... 17
16. Technical data ..................................................................................................................................... 18
16.1. KEA controller.............................................................................................................................. 18
16.2. Analogue inputs and outputs ....................................................................................................... 18
16.3. Relay unit KRK-12....................................................................................................................... 18
16.4. Additional relay unit KRK-27........................................................................................................ 18
16.5. Serial interfaces........................................................................................................................... 18
16.6. KNG for coupling to other systems (option)................................................................................. 18
17. Thermal overload tripping characteristic curve.................................................................................... 19
18. Connection diagrams........................................................................................................................... 20
18.1. Connection diagram KEA 252 PA................................................................................................ 20
18.2. Analogue inputs connection......................................................................................................... 21
18.3. Connection diagram KRK-12/27 (KRK-27 optional).................................................................... 22
18.4. Terminal layout KEA 252 PA....................................................................................................... 23
18.5. Circuit board KRK-12/27 (KRK-27 optional)................................................................................ 24
18.6. Drilling template scale 1:1 –print out without scaling.................................................................. 25

Operating instructions for KEA 252 PA 4 / 25 File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
4. Warnings
4.1. Regulations and instructions
1. Applicable regulations, especially those of the VDE must be observed.
2. The information in the service instructions must be complied with prior to commissioning.
3. The parameterisation of the unit must be carried out in such a way that endangerment of persons and
property is excluded.
4.2. Installation and commissioning
The installation and commissioning must only be carried out by sufficiently qualified personnel.
4.3. Connections
1. The connection of the unit must be carried out carefully, as a wrong connection could lead to the destruc-
tion of the unit. The connection regulations must be observed!
2. The PE(N) must be connected to the terminal 5 of X403.
3. The shields of the analogue signals must only be connected to the earthing screw next to terminal strip
X401 and otherwise no other connection to metal parts.
4. Converter connections k must be connected to the protective conductor.
4.4. Battery and supply voltage
1. If the battery has to be disconnected, the charging unit must be switched off.
2. The battery negative potential must be earthed at the input terminal on the switchboard. The minimum
cross-section is 10 mm2.
3. The supply voltage (12 or 24 V DC) is selected using a switch located on the KRK-12.
4. If the supply voltage of the automatic system was switched off, it must only be switched on again after
approx. 20 seconds.
5. The leakage current of the noise filter upon a 2-phase voltage loss is 22 mA.
4.5. Coils
All the coils must be provided with a freewheeling diode (for DC voltage) or with a quench circuit matching the
inductance of the coil. This also applies for all relays and inductances that are used in the switchgear or are
externally activated.

Operating instructions for KEA 252 PA 5 / 25 File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
5. Functions
The following functions are implemented:
1. Start/stop for diesel and gas motor with check of start preconditions
2. Sensors for busbar and generator voltage, frequency and rotating field (asymmetry). A second voltage
and frequency sensor pair is provided for pure emergency power operation (consumer protection).
3. Generator current sensor: Overload, short-circuit, asymmetric load and thermal overload (bimetallic relay)
4. 64 alarm messages, 35 of which are parametrised specific to the customer (text and control) and the con-
trol of another 4 alarms can be parametrised
5. Event memory for 127 messages with real-time clock stamp
6. Integrated check synchroniser and synchronisation unit (2-channel)
7. Integrated power controller
8. Load distribution
9. Integrated cos φ controller
10.Sealable power failure protection. The following can be monitored:
11.Static undervoltage/overvoltage
12.Overvoltage as an average value over 10 minutes
13.Static underfrequency/overfrequency
14.In addition to the requirements in accordance with VDE-AR-N 4105:
15.Vector shift
16.Voltage and frequency change du/dt and df/dt
17.Control of a diesel motor in accordance with VdS 2100-22:2008-11.
18.Battery monitor and four additional analogue inputs for direct recording of analogue sensors
19.Control of two alarms via limit values for each analogue input
20.Two potential-free analogue outputs, e.g. for direct control of speed, cos φ or other controllers
21.Parameterisation via LWL or USB interface –automatic switching –or direct via the keys and the display
22.Two CAN bus interfaces
23.Diverse expansion options: Modem, pressure control, Profibus coupling, etc.
6. Function differences to the preceding model KEA 102 PA
The automatic system is primarily designed for the use of multi-module systems. All functions are optimally
implemented for this use. However, it can also be used in single systems. Additional functions of the KEA 201
SPL are provided because of the VDE specifications concerning mains parallel operation. Thus, compared with
the previous model KEA 102 PA, functional deviations occur.
As no input is provided for peak load operation for the control designed for the parallel operation of gensets
among themselves, different functions are activated due to the sequence of the MAINS IS ON and START COMMAND
signals.
7. Automatic operation
7.1. Back synchronisation
Back synchronisation can be carried out by an external control. If the mains (external) has been synchronised to
do this after standalone operation, the load of the consumers is slowly transferred to the mains. The external
control can then remove the start command for a required low load of the genset so the generator switches off
and the genset shuts down after the run-on time. If the start command is still pending, the system switches to
peak load operation.
7.2. Peak load operation
The sequence of the signal transmission of start command and mains coupling on specifies this functional
process. If the start command is issued with a mains coupling on signal available, peak load operation is imme-
diately started. If the mains coupling on signal is issued after the start command pending (the system is in
standalone operation), the back synchronisation is first initiated by transferring the consumer load to the mains
and then switches to peak load operation when the start is still pending.

Operating instructions for KEA 252 PA 6 / 25 File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
8. Test operation
As test operation mainly provides for manual operation, some of the specified automatic processes of the VDE
can be manually oversteered during peak load operation. For this reason, only auto operating mode and not test
mode should be selected during peak load operation (the start command and the mains coupling on signal are
pending) to maintain operation in accordance with the VDE specifications.
9. Basic operation of automatic system
The automatic system can be operated very easily, as with all previous models and without menu navigation.
The operating mode can be selected using four buttons. In manual and test mode, the generator is switched on
and off using the buttons arranged in the mimic diagram.
In Manual mode, the Start button is programmed for a manual start. The LED Test and Alarm Off buttons are
self-explanatory.
During normal operation, the display is only required to display pending alarms and the actual values. The menu
is also easy to use here: Use the [→] and [←] keys to select the required group (alarms or actual values) and
use the [↑] and [↓] keys to display the required actual value or pending alarms.
9.1. Operation of the display
You select a parameter or a value just like you read a book. The different groups are saved as 'pages'. The
groups can be scrolled through forwards and backwards using the [→] and [←] cursor keys. Within a group,
they are read like 'lines' of a text from top to bottom. The lines are selected by pressing the cursor buttons [↓]
(down) and [↑] (up). If the ‘end of the page’ is reached, it starts again from the top or the bottom.
To change a parameter, first enter the valid ID number. A Group 0 parameter, -General Parameters-, can be
changed without entering a valid ID number. A parameter is changed as described above.
1. Select the group of the desired parameters with the [←] and [→] buttons.
2. The display with the required parameter is selected using the [↑] or [↓] key. A maximum of two parameters
are displayed.
3. Press the Off and LED Test buttons (function Para on or Para off) at the same time. The parameterisation
mode is initiated and is indicated by the solid cursor [ █ ]. The group or the displayed parameter may no
longer be deselected.
4. The required parameter is selected with the [↑] or [↓] key.
5. By simultaneously pressing OFF and ALARM OFF (ENTER function), the displayed line is defined, which is
indicated by the cursor shape that then displays the parameter position to be chan
]. The line may no longer deselected.
6. The parameter position to be changed is selected using the [←] and [→] cursor buttons and a numeric
parameter is increased or decreased by 1 using the [↑] and [↓] buttons. A parameter that is displayed by a
letter (prefix, alarm coding), is changed using these buttons in reverse order.
7. The displayed parameter is applied by simultaneously pressing Off and Alarm off. If you want to cancel the
parameterisation step, simultaneously press the Off and LED Test buttons instead of Off and ALARM OFF.
9.2. Display contrast setting
The display contrast is increased by holding the LED Test button and pressing the [↑] button (display becomes
darker) or decreased by holding the [↓] button (display becomes brighter).

Operating instructions for KEA 252 PA 7 / 25 File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
10. Parameterisation
The parameterisation is described in the service manual. The parameterisation of the basic settings, group 0, is
explained in the following. These parameters can be changed without an ID number. Group 0 is selected using
the [←] and [→] keys. The basic parameter group is displayed in the following.
KEA 252 PA
KUHSE GmbH
90567 ORDER NO
12345 F-NUMBER
SOFTWARE
010/01/07/2014
***** IDENT-NO
***** PIN NUMBER
LIGHTING
120 sec DURATION
DISPLAY PARAMETER
+ [+]YES [-]NO
....LANGUAGE
0 0=DE, 1=UK
Automatic type display
Display the Kuhse order number and the production number of the automatic
system. This information is necessary for any questions.
Version number and date of the software.
Entry of the ID and the PIN number. The parameterisation is described in the
service manual. The parameters of this group can be changed without a valid ID
number.
Switch-on time of the display lighting. After pressing any button, the background
lighting is switched on for the configured time. The switch-off delay starts after the
last button is pressed. The time can be entered in the range between 10 and 2400
seconds with increments of 10 seconds. With pending alarms, the lighting is not
switched off.
During normal operation, it is useful to quickly use the buttons [←] and [→] to toggle
between the display of the actual values and the pending alarms. If this parameter
is set to [-], the groups with the parameters are skipped.
If a parameter is to be changed, [+] must be entered here so that the parameter
groups are displayed.
Regardless of this setting, you can use the keyboard shortcut LED Test and [←] to
switch to Actual values and with LED Test and [→] to switch to Pending Alarms.
All texts are saved in two languages (German and English here). The language is
selected using this parameter. The entry [0] selects the text in German and [1]
selects the text in English.
03/05/2014
12:17:35
Display of date and time. The automatic system is equipped with a battery-buffered
hardware clock that bridges any voltage failure.

Operating instructions for KEA 252 PA 8 / 25 File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
11. Display and control elements
Display and control elements:
A1: 4 important operating displays A2: 4 programmable displays
B1: Generator voltage B2: Generator ON B3: Generator OFF B4: Generator ON display
C1: Button for parameterisation C2: Button for operating mode C3: Other buttons
D1: Display, illuminates, 2 lines, each with 16 characters, character height 10 mm D2: Cursor buttons
Parameterisation
Off and LED Test buttons
Function: PARA ON
Off and Alarm Off buttons
Function: ENTER
Contrast setting
LED Test and ↑ buttons
More contrast
LED Test and ↓ buttons
Less contrast
11.1. Monitoring on
This green display (after the genset start-up) signals the release of the operating-dependent delayed alarms. As
soon as the motor has started up, this display flashes until the monitoring is enabled. The display goes out at
the beginning of the shut-down process.
11.2. Automatic system locked
This red display illuminates if an alarm to be switched off has elapsed or the external quick stop was actuated.
In order to unlock the system, the Off operating mode must be selected. If the signal cannot be cleared even in
Off, the external quick stop is still active.
11.3. Start control
The message will be activated as soon as a start request is present in automatic mode or if manual or test mode
has been selected. The display flashes as long as there is no start release. The display goes out as soon as the
genset exceeds the ignition speed during start-up (recognised from the D+ signal of the generator or from the
revolution transmitter signal). Switching on the starter is then inhibited, even if attempted manually. The starting
generator voltage interrupts the start but does not cause the START CONTROL indicator to extinguish.

Operating instructions for KEA 252 PA 9 / 25 File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
11.4. Fault
This yellow indicator flashes and the horn sounds once a new alarm occurs. Only the horn signal is acknowl-
edged using the Alarm Off key. The display automatically shows the page with the actual alarms.
If there are multiple alarms pending at the same time, the alarm to be acknowledged is selected using the [↑]
and [↓] cursor keys. For identification purposes, 'New' at the start of the line stands for an unacknowledged or
'ACKN' for an already acknowledged alarm.
The yellow indicator lights up permanently once all alarms are acknowledged and goes out after all alarms are
cleared.
11.5. Four programmable displays
The functions of the four indicators of the right row are programmable within broad limits. You can display
selected, important alarms or used them as operating messages. Despite the direct display, alarms are also
shown on the display.
In addition, each of the 29 digital inputs can be used as an input for an parametrised operating message.
11.6. Mimic diagram / Voltage monitor
The mimic diagram displays the generator and the busbar. The position of the generator circuit breaker is indi-
cated through the green display underneath the keys. Four red and two green indicators are provided for moni-
toring the generator voltage. They show whether the voltage is in the nominal range or whether and which
deviations are present. These indicators arranged under the generator symbol signal:
The green indicators signal that the monitored functions of voltage and frequency are within the tolerances. The
red LEDs only indicate a voltage error if the respective function is enabled for monitoring
All functions (U<, U>, f<, f>) and the response values of the voltage monitors can be parametrised. The un-
dervoltage display also appears if the measuring voltage is connected with a left rotation field or if the voltage
has too large an asymmetry of the vectors.
If an enabled monitoring signals a deviation from the nominal range, the respective red indicator flashes. Both
green indicators remain switched on for the duration of the drop-out delay of the monitor output. After the delay
expires, they go out and the red indicator illuminates continuously. The function is now processed internally.
As soon as the voltage and frequency values are within the tolerance range again, the red display goes out
immediately and a release delay time is started. During this time, both green indicators flash that start illuminat-
ing continuously when the time has expired. The voltage is then recognised internally as ‘good’.
The indicators are switched off if the Off operating mode is selected or if there is no start command pending in
automatic operation.
11.7. Keys for operating mode
The respective operating mode is selected by actuating the Off, Manual, Auto or Test keys. The selection can
be blocked by a key switch (via an input on the additional relay unit).
The speed can be manually set in the Manual and Test operating modes. For this, the speed or the power must
be displayed under actual values and the Manual or Test key must be kept pressed. The speed signal for the
machine can be increased or decreased with the [↑] or [↓] cursor keys.
11.8. Start key
The motor can be started in MANUAL operating mode by actuating this button. If the start program for a gas motor
is parametrised, the start sequence is processed accordingly. If the motor needs to be preheated, the pre-
heating device must be externally controlled. Actuating this key is ineffective when the machine is running or
also in any other selected operating mode.
11.9. LED Test button
The functioning of all LEDs of the automatic system can be tested by this button. It is also used as a multifunc-
tion button when parametrising and for the contrast setting.

Operating instructions for KEA 252 PA 10 / 25 File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
11.10. Alarm Off button
An actuation pulse from this key is used to switch off the acoustic signal issued by a new alarm. If you press it a
second time, the alarm is deleted if the alarm-triggering event is no longer pending. Additional functions are
described in the alarm messages document.
12. Operating modes
The operating modes are selected by four keys. The selected operating mode is signalled by the LED above the
key. The keys can be electrically locked by an input (e.g. by connection of an external key-operated control
switch) so any unauthorised or random change of a defined operating mode is prevented. The operating modes
described below can be selected using the keys.
12.1. Controlling the auxiliary drives
Before each start (if parameterised), a relay with the Auxiliary drives on function picks up. The Start Control
indicator flashes. If the start is released (e.g. gas tightness is checked, exhaust flap open, lubricating pressure is
reached), feedback must be provided. The flashing Start Control indicator lights up permanently after the start
release is issued (when the machine is at a standstill) and the engine can be started.
If no start release is required, the input must be permanently connected with the negative potential as
otherwise no start is carried out.
12.2. Off operating mode
The Off position is automatically selected (reset function) during the application of battery voltage in order to
prevent the triggering of an unintentional start-up. When switching to OFF from another operating mode:
a genset operation is immediately ended
Previously displayed alarms, except fault messages 13 and 14, are deleted as long as the respective
alarm contact is still active
The automatic system is unlocked, even if there is no signal on the quick stop input (emergency stop).
12.3. Manual operating mode
After selecting the Manual operating mode, any auxiliary drives are switched on and, after start enable carried
out, the motor can be started with the Start key. If the generator voltage is within the parametrised nominal
values and no alarm that switches off the generator is pending, genset operation can be switched to with the
Gen. On key (I). The automatic system checks that the busbar is voltage-free and that no switch is switched on
which must be locked out. If this is the case, the switch is directly switched on, otherwise the synchronisation is
selected. The generator is switched off after actuating the Gen. Off key (O). All controllers (power, voltage,
frequency, speed, Cos phi) are switched off.
The actuation of the On key remains ineffective if the generator voltage does not lie within the specified limits.
An external start order does not lead to the automatic switch-on of the generator.
In order to switch off the genset, the Off or (if the automatic start is not present) Automatic operating mode must
be selected.
12.3.1. Manual speed adjustment
The reference value for an electronic speed controller can be set in this Manual operating mode (e.g. during
maintenance of the motor). To do so, the speed must be displayed under actual values and the Manual key
must be kept pressed. The speed signal for the machine can be increased or decreased with the [↑] or [↓]
cursor keys.
12.3.2. Manual voltage adjustment
The voltage can be set manually. To do so, the generator voltage must be displayed under actual values and
the Manual or Test key must be kept pressed. The control voltage for the generator voltage controller can be
increased or decreased with the [ ↑ ] or [ ↓ ] cursor keys.

Operating instructions for KEA 252 PA 11 / 25 File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
12.4. Auto operating mode
12.4.1. Peak load without mains failure control function
Systems that are only intended for peak load operation, i.e. without mains failure control function, can be inde-
pendently operated without a central control system (ZLT). All control functions that are specified by VDE-AR-
N 4105:2021-08 are fulfilled. Mains disconnection is carried out by the generator circuit breaker. The busbar
monitor is used to detect a return of power as the mains voltage is measured continuously here.
The control orders (power specification and limitation) for the automatic system are either issued via the con-
nections of the relay unit or can be issued by a central control system (ZLT) over the CAN_0 bus. Systems with
several gensets must be linked together over the CAN_0 bus.
A remote start is only possible when all requirements of the VDE-AR-N 4105 with regard to the load enable, and
mains voltage and frequency are fulfilled.
In the event of a mains failure (detected by the internal busbar monitor), the generator is immediately switched
off and a switch-off pulse is issued for the external mains switch. If several gensets are switched on, they are
switched off simultaneously by a broadcast telegram on the CAN bus.
If the power enable falls back to 0%, the genset is relieved and shuts down.
12.4.2. Standalone operation without peak load
The mains coupling on signal (connection 21 of the KRK-12) is permanently not issued. This deactivates the
voltage monitor in accordance with VDE-AR-N 4105 or E VDE-AR_N 4120, as only standalone operation is
intended. With a remote start command, the genset starts up and only switches to the bar while observing the
locking conditions. The locked connection is made as described below. If several gensets are used, one genset
is dynamically determined as a master and ensures the load distribution.
A deselected, relieved genset (except for the last one) switches off and shuts down after the run-on time.
12.4.3. Peak load with mains failure control function
For mains voltage monitoring of the emergency current operation, an external voltage monitor must be used. A
mains failure during mains parallel operation is detected by the internal voltage monitor, as the mains voltage is
on the busbar. The external voltage monitor is required for detecting a return of power and mains failure outside
mains parallel operation.
The genset is always started by the remote start input. For an automatic start, any auxiliary drives are switched
on and the parametrised start program is triggered after the start function is enabled. If the genset has not
started at the end of the start program, the failed start alarm is issued and the automatic system inhibited.
After the genset has started up, the generator is switched on while observing the locking conditions as soon as
the nominal generator voltage and frequency are reached.
After removing the start command, the genset switches the generator off, continues to run without load for the
set run-on time and is then shut down.
12.4.4. Sprinkler prompt
The genset is started and can only be stopped by the Off or Emergency Stop key. The exact process (according
to VDS 2100-22) is described further below.
12.5. Test operating mode
12.5.1. General
Test operation is a manual operating mode in which some functions run automatically for safety reasons. If a
remote start command occurs during test operation, the system switches to generator operation. In these cases,
it is no longer possible to switch off the generator circuit breaker manually. It is then necessary to switch back to
Auto in order for all subsequent processes to be carried out automatically in accordance with the VDE specifica-
tions, and cannot be manually overridden.
12.5.2. Generator operation
After selecting the test position, any auxiliary drives are switched on and the parametrised start program is
triggered after the start function is enabled. If the generator voltage with its voltage and frequency values are
within the nominal ranges, generator operation can be switched to using the keys arranged in the mimic dia-
gram.

Operating instructions for KEA 252 PA 12 / 25 File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
12.6. Sprinkler operation
The following functions are intended for the operation of an electrical sprinkler pump:
Switching over of all alarms to be switched off to warning
Start program with 10 (parametrisable) start attempts
for the duration of the start-up time of the sprinkler pump in accordance with the parameterisation switch-off
of the emergency power consumers or no interruption of the emergency supply.
For ending the sprinkler requirements in accordance with the parameterisation:
Cancellation of sprinkler operation after the sprinkler run-on time or only manually switched off
The time stage for sprinkler operation run-on time can be set in the range 10 to 2400 seconds. If it is para-
metrised to 0 sec., the genset does not automatically switch off.
In this case, the display of the Off operating mode flashes.
The genset can then only be stopped by the quick stop or Off operating mode.
The interruption of the emergency current operation for the switching on of the sprinkler pump can be para-
metrised in the range 0 to 24 sec. For the 0 sec. setting, there is no switching-off of the consumers. The switch-
ing-off of the consumers begins with the SPRINKLER OPERATION signal.
If the sprinkler requirement is met, the emergency power consumers are also switched on during a power failure
or remote start. For return of the power or after removal of the remote start command, the emergency power
consumers are switched back to the mains after the switch-back delay.
Switching off the generator or shutting it down due to an alarm is suppressed. However, if a switch-off alarm
occurs, the collective switch-off alarm is output.
13. Alarm messages
For contact inputs, the respective alarm is triggered with the closing (operating current circuit) or with the open-
ing (standby current circuit) of the signal contact against negative potential, and for analogue signals, with the
exceeding or falling below of the set limit values. Alarms 11 to 14 can also be parametrised as a failsafe signal
on output relays, i.e. the respective relay attracts if the alarm is not pending.
13.1. Display and acknowledgement of alarms
If there is no new actual pending, the Actual Alarms group is selected with the [→] and [←] buttons or by simul-
taneously pressing LED Test and [←] button.
When a new alarm occurs, the fault indicator flashes (yellow indicator in the left row of the panel). At the same
time, the acoustic signal is switched on. The horn is switched off and the display is automatically switched to the
page with the pending alarms using the Alarm Off button.
Either <NEW> for unacknowledged alarms or <ACKN> for acknowledged alarms comes before the text of the
pending alarm.
Unacknowledged alarm Acknowledged alarm Display without pending alarms
The displayed alarm is acknowledged or if the fault cause is remedied, an already acknowledged alarm is
deleted by pressing the Alarm Off button. If all alarms are acknowledged, the Common Alarm indicator lights up
permanently. It starts flashing again with a new alarm. If all alarms are deleted, the common alarm indicator is
switched off. The pending alarms are displayed successively and can be acknowledged or deleted using the [↑]
and [↓] buttons.
From the next page (accessible by pressing the [→] button), all pending alarms are displayed successively in
one second intervals. Alarms can no longer be acknowledged or deleted here.
If no alarms are pending, no alarms pending is displayed when opening the pages.
If the generator is switched off due to a warning alarm in automatic operation, the engine is stopped after the
idle time and the automatic system is locked.
NEW GENERATOR
OVERLOAD
ACKN GENERATOR
OVERLOAD
THERE ARE NO
ALARMS PENDING

Operating instructions for KEA 252 PA 13 / 25 File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
13.2. Description of the alarms
13.2.1. Engine does not switch off
If the running message of the motor is still pending after the stop time expires, the Motor does not come to a
standstill alarm is activated. This indicates that the stop equipment (e.g. burned stopping solenoid, jamming gas
solenoid valve) of the motor is defective.
13.2.2. False start
The alarm is activated if the genset has not started at the end of the start program. The automatic system is
locked for any further automatic start-up.
13.2.3. Motor fault
The alarm starts up if the motor is already running and is brought to a standstill without a stop command. The
automatic system is locked at the same time.
13.2.4. Overspeed
For the overspeed monitoring, either the generator frequency or the frequency of a pick-up is used. If the gener-
ator frequency is used for detecting the overspeed, the Generator undervoltage alarm must be parametrised
as an alarm to be switched off in order to ensure the protection of the machine, even in the event of generator
voltage failure
13.2.5. Alarms 13 and 14
Both these alarms are delayed by 0 to 240 sec. by the signal transmission, i.e. for the alarm contact to issue an
error, the signal must be pending for a parametrised time. Furthermore, both these alarms are also effective in
the Off operating mode (Off), but without switching on the horn. This means criteria (such as tank overfilling,
leakage warning) that must always be signalled can be monitored.
13.2.6. Battery voltage monitor
On the direct monitoring output, a relay can be parameterised (at standby current) such that the message is
passed on with standby current even when in OFF operating mode.
13.2.7. Analogue input alarms
The analogue inputs can be equipped with corresponding modules for adapting to different sensors. A variety of
sensors (PT100, PT1000, current loops, thermocouples, VDO sensors, MotoMeters for motor temperature and
oil pressure, etc.) can be connected. For each analogue value, two threshold values can be parametrised, which
trigger an alarm if the value is exceeded or fallen below.
13.2.8. Generator circuit breaker tripped
If parametrised, the generator circuit breaker is monitored for self-activated switch-off (e.g. by attached overcur-
rent trigger). The alarm is internally controlled if no generator feedback occurs after the GENERATOR IS ON
switch-on pulse has expired.
13.2.9. Generator switch-off impeded
The alarm is given if no generator is off feedback is registered approx. 2 seconds after the switch-off command
for the generator circuit breaker. The genset includes a repeated start command and switches to generator
operation or to mains parallel operation for peak load systems.
If an alarm to be switched off now occurs, the genset is switched of and an additional coupling switch or the
mains can be switched off by an output to be parametrised so the genset is not operated further due to reverse
power.
13.2.10. Alarms of the voltage monitor
The frequency and voltage deviations of the busbar and of the generator can be displayed as error messages.
An alarm does not affect the voltage monitor output. If the Gen. underfrequency alarm, for example, has been
activated as a warning message but the frequency is back in the window, this message remains. However, the
generator voltage is recognised as ‘good’ for the control process in the automatic system.
13.2.11. Monitoring the flows
If required, the generator flows can be monitored for overcurrent (e.g. 110%), short-circuit (e.g. 300%), asym-
metric load and thermal overload (bimetallic relay).

Operating instructions for KEA 252 PA 14 / 25 File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
The tripping characteristic curve of a bimetallic relay is recreated for thermal monitoring.
The thermal overload tripping characteristic curve is displayed further below.
13.2.12. Synchronisation fault
A timing element is started with the beginning of the synchronisation process. If no synchronisation is carried
out after this time has expired, the error message is activated. It is possible to parametrise whether an interrup-
tion should be switched now or if attempts should still be made to synchronise the systems.
13.2.13. Power controller defective
If the power controller has not settled after a parametrised time (the actual value must have been within the
dead zone), this alarm is issued. Optionally the genset can be shut down, or a peak load start command can be
cancelled, for example.
13.2.14. Cos φ controller defective
If the cos φ controller has not settled after a parametrised time (the actual value must have been found within
the dead zone), this alarm is issued. Optionally the genset can be shut down, or a peak load start command can
be cancelled, for example.
13.2.15. Reverse power
If the drive motor fails in parallel operation, the generator must be switched off.
13.2.16. Maintenance interval reached
The remaining time to the next maintenance is displayed under actual values. If the remaining time has expired,
a warning alarm is triggered. During the maintenance, the interval is set to the number of operating hours until
the next maintenance.
13.2.17. Maintenance interval exceeded
After the remaining time has expired, a rest period duration until the next maintenance is given during which the
maintenance must be carried out. If this time has expired, another alarm is triggered. This alarm can only be
deleted by the maintenance company.

Operating instructions for KEA 252 PA 15 / 25 File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
14. Display of the actual values
The Actual Values group is selected with the [→] and [←] buttons or by simultaneously pressing LED Test and
[←] button. The displays listed below are displayed using the [↓] and [↑] keys. The [↓] button selects the exam-
ples in the order listed below. Symbolically, they are read from top to bottom like the lines of a book page with
the [↓] key, or from bottom to top with the [↑] key. If the ‘end of the page’ is reached, it starts again from the top
or the bottom.
1
230 233 231 V
50.02 Hz bar
Bar voltage L1, L2 and L3 and frequency. If the grid coupling is on, the
mains or otherwise the generator voltage is displayed
2
398 403 400 V
L1-2 L2-3 L3-1 N
Phase-conductor voltages of the bar. If the grid coupling is on, the mains or
otherwise the generator voltage is displayed
3
230 233 231 V
MIDDLE PHASE TO
NEUTRAL
Average value over 10 minutes of the phase-to-neutral voltages of the bar.
Display only if VDE AR-N-4105 is selected.
4
398 403 400 V
MIDDLE TRIANGLE
Average value of the phase-conductor voltages of the bar over 10 minutes.
Display only if VDE AR-N-4105 is selected.
5
233 231 230 V
50.02 Hz GEN.
Display of the generator voltage against the neutral conductor in the order
L1, L2 and L3 and the generator frequency.
6
403 400 398 V
L1-2 L2-3 L3-1 G
Display of the phase-to-phase voltages from the generator. Sequence L1,
L2 and L3.
7
GENERATOR CURRENT
742 748 740 A
Generator flows in the sequence L1, L2 and L3
8
+ 512 kVA GEN.
+ 445 kW 0.87 in
Display of apparent generator power, performance and middle cos φ
9
MAX. GEN. CURRENT
740 730 735 A
Display of the drag indicator ammeter. The display is reset by pressing the
Alarm Off key for approx. 5 seconds.
10
98 % GEN. LOAD
3 % ASYMMETRIC
Power load of the generator for THERMAL OVERLOAD alarm.
Maximum asymmetric load of the three generator flows.
11
POWER CONTROLLER
300 kW TARGET
Actual reference value of the power controller. As a check, the value of the
external reference value specification or the load slope can be read.
12
230 V 50.00 Hz
234 V 50.23 Hz
Double voltmeter and frequency meter. The upper display shows the mains
or the bar, the lower one shows the system that is synchronised for it.
13
..>.....|.......
................
Display of the synchroscope. The [>] or [<] symbol runs as for the indicator
synchroscope. Synchronism is at the [| ] sign.
14
BATTERY
26.6 V VOLTAGE
Display of the battery voltage. The measuring signal must be on terminal 1
of X401.
15
MOTOR SPEED
1500 rpm
Display of the speed. Either the frequency signal of a pick-up is used or the
generator frequency is converted into a speed.
16
000010 STARTS
000103 h OPERATION
6-digit start counter. Setting the counters under Other parameters.
6-digit operating hours counter.
17
PARALLEL OPERATION
000.025 h
Operating hours in mains parallel operation.

Operating instructions for KEA 252 PA 16 / 25 File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
18
RUNTIME
+ 230 h
Runtime until the next maintenance.
19
DAILY RUNTIME
010:25 h:m
Resettable short time counter. The counter can be reset to 00:00 here.
20
5.6 BAR
OIL PRESSURE
Example of the analogue channel 1 display. The text can be entered with
ParaWin.
21
98 DEGREES
WATER TEMPERATURE
Example of the analogue channel 2 display. The text can be entered with
ParaWin.
22
CHANNEL 3
NOT USED
Example of the analogue channel 3 display. The text can be entered with
ParaWin.
23
+ 300 kW GEN.
PWR REF. VALUE
Example of the analogue channel 4 display. Here the external reference
value specification for peak load operation. The text can be entered with
ParaWin.
24
+ 3400 mV
SPEED CONTROLLER
The example of the display of analogue output channel 5. Here the signal
to the speed controller. The text can be entered with ParaWin.
25
+ 1205 mV
COS PHI CONTROLLER
In the example of the display of analogue output channel 6. Here the signal
to the cos φ controller. The text can be entered with ParaWin.
Display 13, synchroscope
If the synchronisation is not selected, the synchroscope lettering appears instead of the symbols. If the system to be con-
nected is too fast, the indicator runs in a clockwise direction; if it is too slow, it runs anti-clockwise. This display is analogue
to the display of an indicator synchroscope.
Display 18, runtime until the next maintenance
The operating hours counter until the next maintenance is decremented from a maximum value. If the counter reading
reaches 000000, an alarm is triggered (if parametrised). A grace period during which the maintenance must be carried out
can be parametrised. The runtime counter until the maintenance now shows negative operating hours. If no maintenance
has been carried out even after the grace period has expired, another alarm can be activated.
If the grace period is set to 000000, the counter does run into the negative range. It can be set on the display. Thus, the
Maintenance interval reached alarm is deleted.
If a grace period of > 0 is entered (e.g. during the guarantee period), the counter can only be set by the supplier and only
with ParaWin. Therefore, the Maintenance interval and Maintenance interval exceeded alarms can only be deleted by
authorised persons.
Display 19, daily runtime
Here, the operating hours are counted up to 999 hours and 59 minutes. It is used for recording short runtimes (e.g. during
trial operations or mains failures). It can be set to 00:00 without the main operating hours counter being changed.
15. Further functions
15.1. Frequency controller in standalone operation
The automatic system issues commands for the speed controller if the function is enabled if the frequency is not
within the parametrised window. A break is taken between two commands in order for the motor to have time to
carry out the order.
15.2. Voltage controller in standalone operation
The automatic system issues commands for the generator voltage controller if the function is enabled and if the
voltage is not within the parametrised window. A break is taken between two commands in order for the genera-
tor voltage control to settle.

Operating instructions for KEA 252 PA 17 / 25 File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
15.3. Power controller
The process is described in detail in the service manual due to the limitations of the VDE-AR-N 4105 or the E
VDE-AR-N 4120. The power controller can be parametrised as a fixed value or slip value controller. The control-
ler is only enabled for a peak load requirement. It loads the machine in mains parallel operation with a fixed
value control with the parametrised nominal load, or with slip value control in accordance with a specified refer-
ence value recorded via analogue channel 4. A power reduction can be prescribed by the network operator.
After parallel switching, the machine is loaded with 20% of the reference value. During the parametrised loading
time, the reference value is increased from 20% to 100%. If the actual value was in the reference value window,
this ramp function is switched off, i.e. the machine immediately follows a changing reference value specification.
If the genset has been deselected, the load on the generator is relieved. If the actual value has fallen below
approx. 10% of the nominal power, the generator circuit breaker is switched off. A timer is started at the begin-
ning of the relieving sequence. If no relieving is carried out within the specified time, there is probably an error in
the speed controller and the switch is switched off independently of the load of the generator.
15.4. Cos φ controller
The controller is enabled in mains parallel operation. The cos φ controller is activated if the generator power of
L2 (this cos φ is used as an actual value) has exceeded 10% of the generator nominal current. The process is
described in detail in the service manual. The excitation of the generator is controlled in such a way that this cos
φ is within the parametrised window. The readjustment is carried out via adjustment pulses to a motor-operated
setpoint adjuster, or directly to the generator via an analogue signal.
After suspension of parallel operation, the generator voltage is controlled in the parametrised window for the
voltage control in standalone operation during the run-on time.
15.5. Synchronisation unit
The internal synchronization unit is a two-channel device with an adjustable switch reaction time. The second
channel is largely independent of the first and implemented by an adjustable check synchroniser. The two
output commands are connected extremely reliably via relay contacts. The synchronisation time can be moni-
tored and an alarm can be issued if it is exceeded. Furthermore, it is possible to parametrise whether an inter-
ruption should then be switched or if attempts should still be made to synchronise the systems. A voltage ad-
justment of the two systems can be carried out prior to the synchronisation.
After selecting the synchronisation unit, a check is made of whether the difference frequency and voltage differ-
ence lies within the permitted tolerance. If this is not the case, appropriate correction commands are issued. If
the difference frequency is below 0.05 Hz, a position command is issued in the ‘higher’ direction.
15.6. Quick stop (Emergency Stop/Emergency Off)
The input can optionally be activated with an NC or NO contact. A pulse actuation is sufficient to trigger this
function. Thus, independent of the operating mode, the generator is switched off, the genset is shut down and
the automatic system is locked for further start processes (display: AUTOMATIC SYSTEM LOCKED).
15.7. Start program
The standard process for gas motors is as follows:
1. Starter on:
2. if the starter speed is exceeded, the ignition is
switched on (e.g. 2 sec.),
3. then (approx. 2 sec.) solenoid valve open,
4. starter now on for 7 seconds
5. then close gas solenoid valve,
6. starter off,
7. ignition off after 6 sec.,
8. new start sequence after 1 sec.
The start process for diesel motors is parametrised as follows:
1. Start delay 2 sec.
2. Starter on for 10 sec.
3. Pause 7 sec.
4. 3 start attempts,
5. delay monitoring on 7 sec.,
6. switch-back delay 60 sec.,
7. run-on time 180 secs.,
8. stop time 30 secs.
If a diesel motor is used with a preheating system, an external preheating button must be provided in the
Manual operating mode. The start delay serves as a preheating time during automatic starts.

Operating instructions for KEA 252 PA - 18 / 25 - File: BA_KEA 252 PA_EN_Ver 2016-07-01.docx
_________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
16. Technical data
16.1. KEA controller
Unit for front installation, dimensions: (,, depth) 260 x 170 x 100 mm
Weight approx. 2.2 kg, any installation position, protection rating (installed) IP 44
Ambient temperature: Storage -20 °C ... +70 °C, operation 0 °C ... +55 °C,
Switchable supply voltage 9-12-15 V or 14-24-35 V DC
3 parametrisable relays, 35 V DC, 1 Amp. (e.g. for acoustic transducer),
Standards/regulations VDE 100, part 710.
16.2. Analogue inputs and outputs
Busbar and generator voltage monitor 3-phase, adjustable in 1-Volt steps. With incorrect rotation field,
display <U. class accuracy 1 appears.
Unom 231/400 Volt, adjustable 50 - 300 Volt.
Busbar and generator frequency monitor 50 or 60 Hz, continuously adjustable from 40 to 70 Hz.
Generator current measurement 3-phase. Class accuracy 1.
Inom 5 A: Measuring range 0.1 –15 Amp., adjustable in 20 mA steps.
Analogue input 0-20 mA (channel 4) for variable power specification in mains parallel operation.
Battery voltage monitor.
Input for pick-up.
Three free analogue inputs can be optionally equipped with sub-boards for
PT 100/PT1000
Current loops
0 - 10 V DC
Thermocouple NiCr-Ni
Temperature and pressure: Encoder from VDO
Channel 4 is reserved for an external reference value specification 20mA
1 analogue output is equipped with an output card 0 –10V DC for the speed adjustment
as an option, can be equipped with an additional sub-board for further actuations
(Cos-Phi controller)
16.3. Relay unit KRK-12
equipped with:
o 14 connections for alarm contacts, of which 8 can be parametrised
o 14 general control inputs
o 12 relays, contact loading: 30 Volt, 1 Amp. DC
o Additional relay KRK-27
16.4. Additional relay unit KRK-27
equipped with:
o 14 connections for alarm contacts, of which 22 can be parametrised
o 14 general control inputs
o 27 relays, contact loading: 30 Volt, 1 Amp. DC
16.5. Serial interfaces
LWL or USB interface –automatic switching –for parameterisation
CAN bus interface to a central control system (ZLT)
CAN bus interface to the motor management J1939 (protocol must be known and implemented)
16.6. KNG for coupling to other systems (option)
Device for clipping onto top-hat rails: KNG (Kuhse Network Gateway) for coupling to other systems via
PROFIBUS DP or Modbus RTU

Operating instructions for KEA 252 PA - 19 / 25 - File: BA_KEA 252 PA_EN_Ver 2016-07-01.docx
_________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
17. Thermal overload tripping characteristic curve

Operating instructions for KEA 252 PA - 20 / 25 - File: BA_KEA 252 PA_EN_Ver 2016-07-01.docx
_________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: [phone]
[email protected]e
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: [phone]
www.kuhse.de
18. Connection diagrams
18.1. Connection diagram KEA 252 PA