Usually the power of
board alternator is not enough to maintain the normal level of the board
battery state of charge (~ 70%). Cases of battery capacity reduction
to 30% of nominal occur are frequent. In such cases the internal resistance
of the board battery increases, the starting current decreases and the
cranking time of the engine shaft rotation before stable starting increases
too. This situation (together with ageing of a battery) reduces the
reliability of locomotive operation greatly, sometimes breaking down
its starting
All these difficulties can be obviated in case of using a battery together
with an engine starting system SPD-2200, which includes a set of capacitors
with all the necessary additional equipment.
Test results of a battery + SPD 2200, reveal that:
- the capacitor set, operating together with a battery,
takes upon all power functions during maximum starting
energy demand (initial seconds of engine starting); its power
exceeds the starter board battery power in several times;
- the battery is not subjected to large current loading during starting,
its operating conditions become more
moderate; its life time increases;
- state of charge of the battery does not affect the starting characteristics;
- starting is possible without board battery or with a battery of several
times reduced capacity;
It should be noted, that the capacitor set
pillar is a compact unit and the fact, that capacitors are sealed and
maintenance free, makes it possible to arrange the capacitor set in
almost inaccessible places of the locomotive compartments. Besides,
the above mentioned advantages of the combined system prove its high
reliability during operation and practical independence of many exposure
factors.
Efficiency aspects of a combined system application may be subdivided
into long-term and short-term.
Short-term aspect means that the capacitor set fully compensates the
capital expenses for 2- 4 months from the beginning, taking into consideration
fuel cost and operation intensity.
Additional long-term economy is determined on the base of:
- increasing of system service life;
- reducing of maintenance expenses;
- warranted starting of the locomotive out of locomotive depot;
- increasing of resources for locomotive engine.
Economic effect of using SPD-2200 for a locomotive exceeds 4,000 USD
per year.
Products 
Application 
