System {10038} (Menu) - Studer VarioTrack VT-40 User Manual

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VarioTrack
during which the battery voltage is lower than a threshold- is met. These 2 voltages related to 2
durations are configurable. Usually a higher voltage is used for a longer duration and a lower voltage
for a shorter duration.
Voltage 1 for a new cycle {10030} (12.2V/24.4V/48.8V)
Duration under voltage 1 for a new cycle {10033} (30min.)
Voltage 2 for a new cycle {10032}(11.8V/23.6V/47.2V)
Duration under voltage 2 for a new cycle {10033} (2min.)
8.4.9.3 Maximum limit of the cycle repetition {10034} (Yes)
The repetition of the charge cycles can be limited establishing the minimum time between each
cycle using parameter {10035}.
8.4.9.4 Minimum interval between cycles {10035} (1h)
Determines the minimum interval (time) between each cycle when parameter {10034} activates this
function.
If the parameter {10034} is activated and the interval parameter {10035} is set to 24h, there
will be only one charge cycle per day. In this case, if the conditions are met for a new cycle,
it will not take place until the next day and the charger will keep the battery at floating
voltage.
8.4.9.5 Correction coefficient for battery temperature {10045} (-3mV/°C/cell)
If a battery temperature sensor (BTS-01) is used in the system, the charging voltages are automatically
adapted to the battery temperature. The compensation is given in millivolts per degree Celsius (°C)
and per battery cell. For example, at 30°C for a 24V battery having thus 12 cells of 2V: (30-25)*12*(-
3/1000) = -0.18V, a floating set to 27.2V is compensated to a value of 27.02V.
8.4.9.6 Battery charging current {10002} (80A)*
The VarioTrack tries to maximize the battery charging current up to its rated current; however, it is
possible to limit this current using this parameter for small capacity batteries. The current appropriate
to the battery is reported in its technical data. The value set by this parameter is used during the bulk
phase.
*Note: On the VT-65 model, the displayed (factory) value remains 80A but the maximum effective
value will be 65A. On the VT-40 model, the displayed (factory) value remains 80A but the maximum
effective value will be 40A.
If no information to determine the charging current is available, the most frequently used
value is of one fifth of the battery capacity. Ex. for 500Ah: 500/5 = 100A.
Caution: if your batteries are in series, to calculate the capacity, only one has to be
taken into account and not the sum. If the battery bank is composed of several strings,
to calculate the capacity, the sum of the capacities of a battery of each string has to
be taken into account.
8.4.10 System {10038} (menu)
8.4.10.1 Prevents the configuration made by DIP switches {10054} (no)
Blocks the operating mode chosen by means of the DIP switches inside the VarioTrack.
If Parameter {10054) is set on "yes", the DIP switches will remain disabled even if the RCC is
removed after configuration. This secures the configuration of the facility and to prohibit
any subsequent changes with the DIP Switches.
8.4.10.2 Checking the earthing {10060} (no control)
When the battery negative pole is earthed as per recommendations in chap. 4.6, this connection
can be checked by the VarioTrack continuously. Should this connection be faulty, the equipment
turns off immediately and a fault is displayed (see chap. 6.4) or notified by an alarm message on the
RCC (see chap. 8.4.4.1). The various earth connection types that can be checked are the following:
36 V 4.0 User manual