MA-5191A
21-10-2021
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12.
EQUIPMENT TOTALLY TURNED OFF:
When the charger is off and the batteries are connected, a small residual current
flows through the charger due to the measurement channels and the leakage
current of the internal solid state relay. By optimising the charger, it has been
possible to minimise this current, obtaining a value lower than 150µA (normally
lower than the self-discharge current of the batteries used). In this way, the
discharge effect of the batteries due to the charger can be considered negligible.
13.
EQUIPMENT TURNED ON AND WITHOUT MAINS INPUT:
As soon as the grid disappears, the charger switches to the batteries as a power
source. This energy will be used to power the charger control and the charges
connected to its outputs. The power consumption of the control in this situation
is less than 4% of the nominal power for the EDT-150-5191 (intended to maintain
the functionality of the charger status machine, digital outputs, light indications
and communications via Ethernet).
When the battery voltage drops below a parameterised minimum level, the
equipment opens the solid state relay that connects the output to the battery (to
prevent deep discharge and damage to the battery) and stoppage.
13.1.1.1
CONFIGURATION:
The configuration of the charger parameters can be done by means of an XML configuration
file and/or by means of a WEB browser. In addition, the parameters can only be modified
within the range established for each one of them for safety reasons.
13.1.1.2
POWER-UP:
T
he “Power
-
up” process is defined as the start
-up of the charger equipment and the charges
connected to its output, after applying power to its input.
During this process, output 1 of the equipment will go from 0Vdc to the minimum possible
value in less than 1 second (as long as the batteries and charges are not damaged). After
detecting that output 1 has started correctly, the charger starts output 2 and output 3.
The following defines the behaviour of the equipment during the power-up process in different
situations:
-If the battery is not connected:
-The charger is started and starts feeding the output. If the start-up occurs
with charges that generate current transients, the equipment will limit its
output 1 current for self-protection.
-If during this process the power demanded at output 1 is higher than the
maximum that the equipment can supply, it will regulate the output current
and voltage to avoid exceeding the charger limits.
-If the nominal speed is not reached after a certain time, the equipment enters
the overload recovery process (which will be discussed below).