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B1. Safety instructions
Target group:
For skilled electricians and trained personnel
in accordance with national legislation,
including the relevant standards and, where
applicable, in acc. with IEC/EN 60079-17 on
electrical apparatus for explosive atmospheres.
The battery must not be operated in zone 0
or zone 20 hazardous areas!
B2. General information about
the charging technology
The microcomputer controlled charging system
measures the charging and discharging current
and transmits it to a capacity meter. Five green
light emitting diodes indicate in 20%-steps the
actual charge state of the battery
Overcharging is prevented by means of this
charging control dependent on the capacity.
Only the energy drawn is recharged. The
so-called memory effect is thus also prevented.
For electrochemical reasons charging and the
capacity are influenced at temperatures below
-5 °C and above +35 °C.
At temperatures below -5 °C and above +35 °C
charging will take a longer time and full charging
is not guaranteed.
Important notes
for battery handling
B3. Charging
B3.1 Initial Charging
Battery charging starts when the power is
switched on. On the connection of a new battery
the indication of the charge state may be delayed
by a few minutes. The first green LED might take
a few minutes to start flashing.
After a charging period of 14 hours the battery
will have reached approx. 90% of its rated
capacity. As the capacity of the battery is over
specified, this 90% will be sufficient to provide
a rated discharge for both a 90 minute and
180 minute setting.
Initial charging at 0 °C ambient temperature
might take double the time than at temperatures
of >10 °C
After first mains connection an uninterrupted
charging time of 20 hours is recommended to
avoid early ageing due to power-on power-off
situations. The battery set is only partially
charged when supplied.
Multiple switching (on - off) of the mains
circuit should be avoided before a first initial
charge (recommended 20h, minimum 14h) is
achieved. Such interruptions can significant-
ly reduce the lifetime of the battery.
Recommendation: New batteries will reach the
full utilisable capacity after approx. 3 charging /
discharging cycles.
B3.2 Charging during operation
The charging current is engineered in such a way
that a discharged battery will have within 14 h
approx. 90% and within 20 h approx. 100% of its
capacity.
In emergency operation the battery voltage is
monitored via a deep discharge protection which
prevents a deep discharge of the cells.
The microprocessor controls and recharges any
reduction of capacity due to self-discharge in
normal operation.
It is recommended to have one or two fully
discharges per year. This increases the usable life
time of the battery.
Should this not be possible due to logistic and
safety reasons at least a partial discharge of a
minimum of 40 minutes or 2 hours depending on
the setting, is recommended.
B3.3 Charging after storage
After a long storage of the batteries a full
uninterupted charge for 20 h should be applied
followed by a full discharge down to deep
discharge protection (emergency lamp off).
If the capacity indication does not show 5 green
LEDs fully lit after 14 h, the above process should
be repeated. For a storage period > 6 months it
is recommended to have 3 charging/discharging
cycles.
GB
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