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KraftPowercon Sweden AB, Hjalmar Petris väg 49, S-352 46 Växjö, Sweden, Tel: +46 470-705200, Fax: +46 470-705201,
www.kraftpowercon.com
Interlocking:
Mid voltage measurement and the advanced battery circuit test, and thereby
alarm function, see section
5.13.3.
Fault causes:
1) Sulphated (aged) battery cells.
2) The causes specified for
Symmetry fault1
.
Other:
The delay time must be shorter than the test time which is around three
minutes. Must be set with acknowledge demand as the alarm condition will
not last.
See also
Symmetry fault 1
.
BATT.CIRCUIT FAULT
Function:
Tests the entire battery circuit, i.e. the cables, connections, fuses and battery.
Alarm condition: The charging voltage falls below the set limit value during test.
Interlocking: -
Fault causes:
1) Fault in the connections and cables
2) Defective
battery.
3) Tripped battery fuse.
Other:
Due to Its instantaneous nature, this alarm must be set using an acknowledge
demand in order to be identified.
See also the
Symmetry fault 2
alarm.
MAINS FAULT
Function:
Monitors incoming mains voltage.
Alarm condition: One of the rectifier units reports a mains fault.
Interlocking: -
Fault causes:
1) Current breaker for feeding mains open.
2) Fault in incoming mains.
3) Defective rectifier unit.
NO CHARGING
Function:
Indicates that the battery is not charged.
Alarm condition: The system voltage falls below the set limit value.
Interlocking: 1)
When
testing
with
lowered voltage, e.g. battery circuit test).
2) If the rectifier works with an output current greater than 90 % of the set
current limit.
3) Due to high temperature, the float charging voltage has been adjusted
down to a level close to the alarm limit.
Other:
In the case in point 3 above, the alarm limit is adjusted down in order to
maintain a difference of around 2 % between the float charging voltage and
the alarm limit.
RECTIFIER FAULT
Function:
Indicates faults in the rectifier unit.
Alarm condition: Individual rectifier unit reports a fault.
Interlocking:
1) For mains fault.
2) For external blocking.
Other:
For detailed information on the cause of the alarm, see section
5.7.3.2.
MEAS.CIRCUIT FAULT
Function:
Tests the circuit for measuring system voltage.
Alarm condition: The difference between the measured battery voltage and the mean value of
the output voltage from all rectifier units exceeds the set limit value (specified
in % of system voltage).
Interlocking:
1) When testing with lowered output voltage, e.g. battery circuit test).
2) For mains faults.
3) For
rectifier
faults.
4) For external blocking.
5) For
internal
faults.
6) For communications faults.
