www.pulsar.pl EN54C
RED POWER plus
18
6. Reserve power supply circuit.
The PSU is fitted with intelligent circuits: battery charging circuit with the function of the accelerated
charging and battery control, which main task is to monitor the condition of the batteries and the connections in
the circuit.
If the controller detects a power failure in the battery circuit, appropriate indication and change of the
ALARM technical output.
6.1. Battery detection.
The control unit of the PSU checks the voltage at the battery terminals and, depending on the measured
values, determines the appropriate reaction:
U
BAT
below 4 V - batteries not connected to the PSU circuits
U
BAT
= 4 to 20 V - faulty batteries
U
BAT
over 20 V - batteries connected to the PSU circuits
6.2. Protection against short-circuit of the battery terminals.
The PSU is fitted with the circuit protecting against short-circuit of the battery terminals. In case of short
circuit, control circuit immediately disconnects the batteries from the rest of the power supply circuit, so the loss
of output voltage on power supply outputs is not observed. Automatic reconnection of the batteries to the PSU's
circuits is only possible after the removal of the short-circuit and correct connection of the circuits.
6.3. Protection against reverse battery connection.
The PSU is protected against reverse connection of the battery terminals. In case of incorrect
connection, the F
BAT
fuse in the battery circuit becomes blown. The return to normal operation is possible only
after replacing the fuse and correct connection of the batteries.
6.4. Deep discharge battery protection UVP.
The PSU is fitted with the disconnection system and the battery discharge indication. If the voltage at
the battery terminals drops below 20
V±0.2 V during battery-assisted operation, acoustic indication will be
activated and the batteries will be disconnected within 15s.
The batteries are reconnected to the power supply unit automatically once the 230 V mains supply is
restored.
6.5. Battery test.
The PSU runs battery test every 5 minutes. During testing, the control unit of the PSU measures the
electrical parameters according to the implemented measuring method.
A negative result occurs when the:
- battery circuit continuity is interrupted,
- resistance in the battery circuit increases above 300
mΩ
- terminal voltage drops below 24 V.
The battery test will also be automatically locked when the PSU is in the operating mode, in which the
battery test is impossible. Such condition occurs, for example, during battery assisted operation.
6.6. Measurement of the resistance of the battery circuit.
The PSU is checking the resistance in the battery circuit. During the measurement, the PSU driver takes
into account the key parameters in the circuit,
and once the limit value of 300m ohms is exceeded, a failure is
indicated.
A failure may indicate considerable wear or loose cables connecting the batteries.
6.7. Battery temperature measurement.
Temperature measurement and compensation of the battery charging voltage can extend the life of the
batteries.
The PSU has a temperature sensor to monitor the temperature parameters of installed batteries. It is
recommended to place the temperature sensor between the batteries. Be careful not to damage the sensor
when moving the batteries.
