Studer VarioString VS-120, Руководство пользователя

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VarioString
User manual V 2.3 37
a coherent operation of multiple units which participate to the battery charging and avoids multiple
successive equalizations triggered by each charger.
9.4.5.2 Battery charge current (120 Adc) {14001}
See Basic Settings, chap. 9.4.4.2.
9.4.5.3
Battery charge current (VS-70) {14217}
See Basic Settings, chap. 9.4.4.2.
9.4.5.4
Battery under-voltage {14216}
This parameter sets the undervoltage level of the battery. In case of battery undervoltage, the red
LED will blink 1x, a message is sent to the RCC and an event based on this undervoltage can be
programmed on the auxiliary relays.
9.4.5.5
Temperature compensation {14035} (-3mV/°C/cell)
If a BTS-01 or BSP temperature sensor is used, the voltage adjustment thresholds for charging the
battery (absorption, equalization, floating…) are automatically corrected in real time according to
the battery temperature. The value of this compensation in mV/°C/cell for a reference temperature
of 25°C is set by parameter {14035} to -3mV/°C/cell. For example: for a 48V battery (24 cells of 2V) at
a temperature of 30°C, the voltage compensation is: (30-25)*24*(-3/1000) = -0.36V. For a floating
voltage value {14005} set to 54.4V the effective floating voltage (compensated) will be 54.04V.
9.4.5.6 Floating phase {14004}
9.4.5.6.1 Floating voltage {14005} (54.4 Vdc)
Determines the voltage applied when the battery is fully charged. This voltage prevents self-
discharge and keeps the battery to its optimum charge level.
9.4.5.6.2 Force phase of floating {14006}
This parameter may be used to force a battery cycle in progress to assume the final values of the
floating voltage phase. If the battery voltage level is higher, the charger momentarily switches out
until the new target voltage is reached.
9.4.5.7
Absorption phase {14007}
During this phase, the battery accumulates the last percentages of power to be stored. This phase
takes place at a constant voltage. Over the course of this phase, the necessary current diminishes
progressively. Therefore, the VarioString does not work at the optimal point of the PV generator
because all the available PV power is not required.
9.4.5.7.1 Absorption phase allowed {14008} (yes)
This parameter determines whether the absorption phase is carried out or not. When this phase is disabled,
the charger goes directly to the following authorized phase (equalization, but most often a floating phase).
9.4.5.7.2 Absorption voltage {14009} (57.6 Vdc)
Defines the applied voltage during absorption phase.
9.4.5.7.3 Force absorption phase {14010} (signal)
This signal starts again an absorption phase from the floating phase. The charge indicator (2) flashes
2x indicating that the equalization phase is on-going.
9.4.5.7.4 Absorption duration {14011} (120 min)
Use this parameter to set the absorption duration. The absorption phase starts once the set voltage
{14009} is reached. When the time is over (see chap. 7.2.2), the charger goes automatically to the
following authorized phase.
When this parameter {14036} is activated, all other parameter involved in the battery cycle
are hidden and not accessible. In this case, only the maximum charging current is
adjustable.