Operating instructions for KEA 291 NSTR -
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- File:
:
BA_KEA 291
NSTR_EN_Ver
2015-03-
20_EN.doc
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Alfred Kuhse GmbH
Telephone: +49(0)4171-798-0
E-mail: [email protected]
Subject to technical changes
An der Kleinbahn 39,21423 Winsen
Fax: +49(0)4171-798-117
http://www.kuhse.de
If the message is not acknowledged, the genset switches off after the idle time in automatic opera-
tion.
9.4.4.
Switching off mains impeded
The alarm is given if no M
AINS IS
O
FF
feedback is registered approx. 2 seconds after the switch-off
command for the generator circuit breaker. In the event of emergency power failure, the genset is
switched off after the idle time, as the generator operation cannot be switched over.
9.4.5.
Switching off generator 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 renewed start command and
switches into generator operation. If a switch-off alarm occurs, the genset is now stopped.
9.4.6.
Overspeed
For the overspeed monitoring, either the generator frequency or the frequency of a pick -up is used (according
to the parameterisation).
9.4.7.
Speed measurement failed
This message is always effective. If all parameterised criteria for the R
UNNING
message are with-
drawn during operation, the monitoring is switched off. For this reason, the genset is shut down and
the automatic system is locked and the
FAILED START
/
MOTOR ERROR
message is displayed.
9.4.8.
Engine does not switch off
This message is always effective. If the motor still runs after the stop process has expired (parame-
terised though the switch-on duration of the stop solenoid), the stop process is repeated and the
FAILED START
/
MOTOR ERROR
message is displayed. The automatic system is not locked, so that the
genset can immediately switch to generator operation for a start requirement (power failure or sprin-
kler requirement).
10.
Remote acknowledgement
Existing alarms can be remotely acknowledged with a signal (L-) on terminal 32. A constant signal
provides the command to unlock only once. The automatic system is also unlocked if all of the deac-
tivating fault messages can be cleared. The M
AINS CIRCUIT BREAKER TRIPPED
and G
ENERATOR CIRCUIT
BREAKER TRIPPED
signals are also cleared.
The parameterisation defines which alarms are to be cleared. If the alarm contact is still active, re-
mote acknowledgement of the message is not possible. If the automatic system has been inhibited
by the Q
UICK
S
TOP
input, it cannot be unlocked by the remote acknowledgement, but only locally by
changing the operating mode to O
FF
.
11.
Frequency regulation in emergency power operation
The automatic system provides adjusting pulses for the speed controller (if the function is enabled)
when in A
UTO
and T
EST
operating modes, if the frequency is not within the parameterised window. A
pause is made between two pulses so that the motor has time to execute the command.
12.
Emergency Stop / Emergency Off (external)
A pulse on the Q
UICK
S
TOP
(E
MERGENCY
S
TOP
) input is sufficient to trigger the Emergency Stop func-
tion. Thus, independent of the operating mode:
the generator is switched off,
the genset is shut down,
the automatic system is locked for further start processes (display:
AUTOMATIC SYSTEM LOCKED
).
In order to unlock, the system must be changed to O
FF
operating mode. If the Q
UICK
S
TOP
signal is
still pending, it cannot be unlocked. The A
UTOMATIC SYSTEM LOCKED
display remains switched on.
