REBC 4.5 kW Battery Charger for LHB Coaches

MAK Controls as a Trusted Vendor for Indian Railways

MAK Controls & Systems Pvt. Ltd. has been a trusted vendor to Indian Railways for more than four years, successfully supplying over 650 units of the REBC 4.5 kW Battery Charger for LHB (Linke Hofmann Busch) coaches.

This high-efficiency, high-technology charger is designed and manufactured with advanced power-electronics architecture, ensuring precise charging control, superior reliability, and energy optimization under diverse field conditions. Each unit adheres to stringent RDSO and Indian Railway specifications, reflecting MAK’s uncompromising commitment to engineering excellence and quality assurance.

With proven field performance across multiple railway zones, the REBC 4.5 kW charger has become a benchmark product for LHB coach battery-charging applications, contributing to Indian Railways’ goals of enhanced operational efficiency and reduced maintenance.

Through consistent innovation and dependable service, MAK Controls continues to be a key technology partner in the modernization of India’s railway infrastructure.

Technical details of 4.5 kW Regulated Battery Charger (RBC)
Parameter	Details
Type	Constant voltage with current limiting feature
Input Voltage
Mains Nominal Voltage	415 V AC, three Phase, 4-wire system
Minimum Voltage	350 V AC, three Phase
Maximum Voltage	480 V AC, three Phase
Frequency	50 Hz ± 3%
THD (max) Voltage	10%
Output (DC)
Type	Fully insulated from coach body on both positive and negative sides
Output voltage	110 to 135 volts (settable with the help of key pad)
	122 volts±2% (During normal operation of battery charging)
Output current	35A
a. Battery charging current	10A to 15A (settable with the help of key pad)
b.Other loads	20A
Output Power	4.5 kW (max.)
Type & Ah rating of Battery	Lead acid, 70/ 120 Ah (both flooded and VRLA)
Efficiency	≥ 92% @ Full Load, ≥ 85% @ Half Load
Voltage ripple	≤ 2 % of set voltage
Current ripple	≤ 3 % of set current
Frequency	50 Hz ± 3%
Frequency	50 Hz ± 3%
Dimension (charger unit) (as per RDSO/PE/SK/AC/200 -2018 (Rev.0)	Length (max)- 900mm
	Depth (max) - 440mm
	Height (max) - 650mm
Weight (Charger unit)	<120 kg

PROTECTIONS AND INDICATIONS FOR RBC

The RBC has the following protective features

Technical details of 2.5 Emergency Battery Charger (EBC)
Parameter	Details
Input nominal voltage	240 V ± 15% AC Single phase
Frequency	50 Hz ± 3%
Output voltage	110V ± 5% DC
Output current	22A
Output power	2.5 kW (max.)
Efficiency	≥ 90% @ Full Load
Output voltage ripple	≤ 2 % of set voltage at full load

PROTECTIONS AND INDICATIONS FOR EBC

The EBC has the following protective features