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DSOP24V
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6. The reserve supply circuit
The power supply is equipped with intelligent charging and battery control circuits that enable adequate
maintenance and monitoring of their condition.
The system allows connection of 1 or 2 strings (circuits) of batteries, each with up to 230Ah, which allows
for a total capacity of 460Ah. In order to ensure sufficiently long battery life, the charging voltage compensation
function is used, which, together with the temperature sensor, is responsible for adjusting the voltage at the battery
terminals depending on their temperature. It is recommended to place the temperature sensor between the
batteries.
If the power supply driver detects a fault in the battery circuit, then the appropriate indication and the activation
of the APS and ALARM outputs are triggered.
6.1. Battery test.
The PSU performs the battery test every 5 minutes. During the test the power supply controller measures
the electrical parameters in accordance with the implemented measurement procedure.
A negative result occurs when the continuity of the battery circuit is interrupted, the resistance in the battery
circuit exceeds the reference resistance by 60 mΩ, or when the terminal voltage drops below 24V. Such failure
may indicate a significant battery consumption or loosening of the connection cables.
The battery test can be activated manually from the menu of the power supply (see section 5.5.1), e.g. in
order to test the replaced batteries after periodic maintenance.
6.2. Calibration of the batteries.
The power supply is equipped with a battery calibration function to be carried out when replacing the
batteries with new ones
Replacing the batteries with new ones, fitting them properly and starting the calibration
procedure should be performed with full awareness of the risks that may result from improper
operations.
According to the guidelines of the Scientific and Research Centre for Fire Protection
and VdS, batteries should be replaced after 4 years of use regardless of their condition.
When replacing batteries, make sure that they are from the same manufacturer and from the same
production batch. Battery replacement must be carried out simultaneously for all battery strings.
During the calibration process, the power supply driver measures the reference resistance for the newly
installed batteries, including connections and other circuit components.
The result of the resistance measurement is influenced by many factors. It is recommended that the new
batteries should be recharged using an external charger before installing them in the cabinet.
In addition, during the installation, special attention should be paid to mechanical connections with the battery,that
is make sure that cable terminals are properly connected with the clamp caps and check the condition of the
connecting cables.
Starting the calibration procedure
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Simultaneously press the „<,>” rightmost and leftmost buttons and hold for at
least 5 seconds
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The „tSt” parameter will be displayed
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Use the „<” or „>” buttons in order to display the "CAL" parameter
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Press the „OK” button and hold it down for at least 5 seconds
- The information about the readiness for the calibration process will be displayed