Operating instructions for KEA 252 PA
13 / 25
File: BA_KEA 252 PA_EN_Ver 2016-07-01
______________________________________________________________________________________
Alfred Kuhse GmbH
Telephone: +49 4171-798-0
Subject to technical changes
An der Kleinbahn 39, D-21423 Winsen (Luhe)
Fax: +49 4171-798-117
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 O
FF
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 G
ENERATOR 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).
