BAC 25A-50L XXX

Battery Charger BAC Series

• Lightweight – only 10 kg / 22 Ibs
• Instrument max power – up to 2,7 Kw
• Voltage range up to 300 V DC
• Current range up to 50 A DC
• Measurement resolution – current 0,1 A, voltage 0,1 V
• Two charging modes available: IU - constant current + constant voltage, UU - constant voltage + constant voltage, with current limit
• Adjustable alarm and shutdown parameters for preventing excessive charge

Powerful and Portable Battery Charger Description Following a power outage, various power engineering objects such as power plants should be kept operating on batteries. It is necessary batteries to be charged in order to compensate its energy loss and keep their voltage within the predefined limits. BAC series devices are a portable battery charger used for charging LeadAcid, Ni-Cd and Li-ion batteries. BAC series devices are intended to support the main charger in order to charge battery much faster or to quickly recharge a battery following a discharge test. Using two charging modes it provides the possibility of maintaining and recharging the batteries either with a constant current or a constant voltage. BAC Series contains two models, depending of maximum charging current by different voltage levels:

• BAC25A model can generate currents up to 25 A, with a maximum output voltage of 300 V (the maximal current is 10 A at 300V)
• BAC50L model can generate currents up to 50 A (for voltages up to 50 V), with a maximum output voltage of 60 V (the maximal current is 30 A at 60 V) In addition, BAC Series devices are equipped with thermal, overcurrent, and over-voltage or under voltage protection. Provided display enables users to read all relevant information during a charging process and to adjust the charging current, charging time, etc.

In addition, BAC Series devices are equipped with thermal, overcurrent, and over-voltage or under voltage protection.

Provided display enables users to read all relevant information during a charging process and to adjust the charging current, charging time, etc.

Benefits and Features

1. Display - Values of output voltage, current and other working status information are displayed on the LCD screen.
2. Keyboard - used for controlling and operating the instrument.
3. Status indicating LED diodes
4. PT100 probe connector for ambient temperature measurement.
5. USB PC Interface.
6. Overvoltage alarm terminal - used for triggering external alarm.
7. Undervoltage alarm terminal - used for triggering external alarm.
8. Current and voltage sense terminals - connecting the current and voltage sense cables.

Application example

Typical application is charging batteries that serve as a backup power supply in:

• Power plants
• Generator excitation systems
• Substations
• Protection and control systems
• UPS battery strings

The BAC series devices is connected to a test battery using the current cables. The voltage sense cables may be used optionally. Next step is to set the current and the voltage alarm levels. After starting the charging process BAC series devices keeps the current or voltage level constant depending on the selected charging mode. When applying the IU charging mode, the battery is charged with a constant current. The voltage increases to a level close to the final voltage (boost voltage), the device switches to a constant voltage (float voltage) mode and the current begins to decrease. Cut off occurs when a predetermined minimum current value, which indicates a full charge, has been reached. When opting for the UU charging mode the battery will be charged under a constant voltage. If the battery current becomes larger than the defined current limit, the charger will switch into a constant current mode and continue charging with constant current that is equal to specified current limit.

Otherwise, the charger keeps charging under the selected constant voltage, the current will decrease over time until it reaches a predetermined minimum value. At this point of time the charger will switch to a float charge stage and decrease to a selected float voltage.

BAC Series – models

BAC 25A

• Applicable to 10 – 300 V DC battery voltages
• Weight – 10 kg (22 lbs)
• Instrument max power – up to 2,7 kW
• Current range – up to 25 A

BAC 50L

• Applicable to 1 V – 60 V DC battery voltages
• Weight – 10 kg (22 lbs)
• Instrument max power – up to 2,5 kW
• Current range – up to 50 A