RTB Compact

Battery Charger 50-200 A 3ph

The RTB Compact is designed to cover the lower range of industrial chargers but still offering all the functions and controls with Borri microprocessor controller providing reliable operations with ease of settings and communication.

The charger is a thyristor-controlled rectifier suitable for charging nickel-cadmium or lead acid batteries while simultaneously supplying DC loads.

  • Proven microprocessor control.
  • Large LCD and LED display with mimic panel and history.
  • Wide selection of alarms, indications and measurements.
  • Electronic battery and charger output current limit.
  • 6 pulse thyristor bridge with isolation transformer.
  • Communication ports and potential free contacts.
  • 4 level battery charging including optional manual charge.
  • High MTBF and low MTTR.
  • Operates with Nickel-cadmium (vented/ gas recombination) and Lead acid batteries (vented/ gas recombination).
  • Advanced Battery Management.
  • Flexible in-built features.
  • Internal rectifier input circuit breaker and output switch.
  • 6-pulse rectifier bridge with input isolation transformer.
  • Output LC ripple filter.
  • Rectifier protection fuse.
  • Advanced Multi-functional LCD Display with active mimic diagram.
  • Audible alarm.
  • Floor mounted cabinet with IP 20 protection and IP 20 open door.
  • Power and control cable markings.
  • Halogen free cable.
  • Component markings.
  • Bottom cable entry.
  • Standard labeling / nameplate.

Tech Specs

RTB Compact 50-200 A 3-phase Battery Charger

Rating (A) 50 100 150 200


Nominal voltage 380/400 Vac 3-phase ±10% (others on request)
Frequency 50/60 Hz ±5 Hz


Nominal voltage 24/48/110/125/220 Vdc
Static voltage regulation ±1%
Voltage ripple ≤1- 2% with and without battery depending on output voltage
Overload capacity <120% for 20 min; <150% for 2 min; >150% for 20 s (protection electronic current limit)*
Charging characteristic Constant current / constant voltage (I/U as per IEC 478-1) during float charge

*available as option


Dimensions WxD (mm) Height is 1900 mm, width and depth vary with output rating (see the table below)
Rating (A) 50 100 150 200
Output voltage 24 Vdc 600x640
48/60 Vdc 600x640
100/125 Vdc 600x640
220 Vdc 600x640
Cooling Natural Forced (natural for 150 A on request)
Colour RAL 7035 (other colours optional)
Protection degree IP 20 as per IEC 60529 (other protection degrees up to IP 42 optional)
Operating temperature -10°C to +40°C (up to 55°C available as option)
Storage temperature -20°C ÷ +70°C
Altitude <1000 m (derating according to EN 62040-3)
Audible noise at 1 meter (dBA) <55 to 65 dBA at 1m depending on rating and fan redundancy

User Interface

Front panel LCD display, LED mimic, function keys. Customizable status and alarms LED’s
Standard alarms AC Fail, DC Hi, DC Low, Charger Fail, Overload, Blown Fuses, Battery Discharge, Common Alarm
(many other available as standard)
Connectivity Potential free contacts (available as option)


Safety IEC EN 50178, IEC EN 62040-1
EMC IEC EN 61000-6-2, IEC EN 61000-6-4,IEC EN 62040-2
Test and performance IEC EN 60146
Marking CE (CSA/UL certified as optional)