Saft has been the main supplier of batteries for applications such as traveller information terminals, electric Bus applications (Ni-Cd STM batteries, Ni-MH and Li-ion batteries), hybrid Bus applications (Ni-Cd STH batteries,Li-ion high power and medium range batteries) and asset tracking (LS, LSH, T, LO, G, LM and MP), offering an attractive combination of cost-effectiveness, reliability and the capacity to supply autonomous energy wherever needed.
2. Diesel locomotives & Multiple unit
DMUs(Diesel Multiple Units) require and independent power source for the diesel engine starting (SRX, SBH, SCH S). They require also energy to back-up the low voltage system (MATRICS MRX
, SRX, SRM, SBM). More and more rail transit companies use asset tracking (LS, LSH, T, LO, G, LM and MP) equipment such as GPS or RFID, depending on the environment and the system in which it is integrated.
3. Electric locomotives & Multiple unit
On electric locomotives, batteries are used to raise and lower the pantograph to connect the overhead catenary and also to supply emergency power as back-up for the low voltage system (MATRICS MRX, SRX, SRM, SBM).
With both EMUs and electric locomotives, emergency power is required for systems such as lighting and air-conditioning, computing, communication and door control.
4.High speed train & Tilting train
Batteries perform two distinct functions.
One function is to provide power for back-up braking and/or tilting systems (MATRICS MRX, SRX, SRM, SBM), which require a high current for a short period of time.
The other function is provision of back-up lighting, air-conditioning and radio communication for passenger coaches for up to 90 minutes.
This back-up of the low voltage system (MATRICS MRX, SRX, SRM, SBM) requires detailed analysis for the optimum solution.
5.Light rail vehicles
LRV's require an independent power source to back-up the on-board low voltage system (MATRICS MRX, SRX, SRM, SBM), for door control, lighting and air conditioning, radio communication, and computing systems, typically for 30 min.
For metros and rapid suburban transit networks, batteries must be able supply power for up to one hour for emergency lighting and air conditioning, computing systems, and the opening of automatic doors. In addition radio communication from the driver's cab to the control unit must also be maintained. (MATRICS MRX, SRX, SRM, SBM)
7. Passenger coaches
Batteries are used on conventional train passenger coaches to provide a reliable emergency power supply (SRM SCM-S SBL and SLM) in case of failure of the main power supply. They may come into operation not only for emergency purposes, but also whenever the train is at a standstill with the engine still running. These batteries maintain lighting, ventilation, air-conditioning and switching & transmission systems.
8. Rail infrastructure
Signaling (SPL Ni-Cd) and communication are complex and critical factors in a rail system. In many applications along the track, batteries are used to meet peak electricity demand and to provide back-up power to all security systems (SBL and SLM, VHT AA and VHT Cs, Ni-Cd VT range) in case of emergency ((SBL and SLM, VHT AA and VHT Cs, Ni-Cd VT range). The batteries may also provide storage for solar and wind-powered generators (Sunica.plus ) along the track.
These switchgear and transmissions systems (SBL / SBM / SBH , SLM, SPH) are frequently installed in unattended operation and must be capable of operating for long periods with total reliability and without maintenance.
With the improvements in system economics, the use of solar and wind-powered generators (Sunica.plus) is becoming more widespread.
In addition, Substationss require UPS systems (SBH and SPH, SLM, VHT AA and VHT Cs, Ni-Cd VT range) and auxiliary generator set with its associated engine starting (SBH, SPH) battery to protect their control system (block battery SB range, SPH and Ultima SLM) and emergency and security systems (SBH and SPH, SLM, VHT AA and VHT Cs, Ni-Cd VT range, VT Cs, VT D and VT F) as well as data and information systems and process control to protect other systems.