HomeLatest NewsJSF LOTROL System

Friday, 17 February 2012 08:37

JSF LOTROLThe LOTROL™ system

The Future Arrives for On-board Vehicle Electronics - LOTROL™ System
The LOTROL™ system was developed by JS Fraser to address the operational vulnerability of mission critical vehicles initially in Command & Control vehicles operated by the Police, Ambulance and Fire Services where loss of electrical power damaged sensitive equipment, resulted in the loss of irreplaceable data, and once the conventional UPS backup had been used effectively put the on-board systems out of use for up to 8 hours.


LOTROL™ provides industrial level protection and resilience which cannot be provided by conventional on-board UPS systems.

The key technical elements of the in-house designed JSF LOTROL™ remain commercially sensitive however we can reveal some of the detail and the key operational improvements it provides:-

•    Operationally much more robust protection than that possible by conventional UPS systems
•    Operates fully automatically allowing operators to concentrate on their primary role.
•    Provides a configurable quiet runtime (typically 2 hours) with power coming from the DC battery pack via an inverter for mains equipment.
•    The system utilises programmable resilient CANbus technology and fully integrates and automatically manages and controls the entire electrical power supply system (including battery protection – auxiliary and main battery) – AC power, DC power, generator power etc. – without the need for human intervention.
•    Touchscreens and keypads linked to the CANbus system provide both system control and key information data and alerts (audible and visual) to the vehicle operators.
•    Advanced integration of matched battery technology into the overall electrical system ensures that the high power battery packs are fully protected and correctly cycled within their design criteria to preserve their 5 to 6 year life. The DC system provides power to all but the high power functions of the vehicle.
•    Within 15 seconds of an external power failure any on-board generator will automatically start without the need for human intervention while the integrated battery system automatically provides protection for key electrical systems during that short period. The generator will automatically stop when external power is restored.
•    In the event of a catastrophic failure of both external and on-board generator power supplies the system will provide the following 220-230v backup power for key equipment typically for typically 1 hour. During and after this backup period the batteries remain fully protected and within their design voltage operating range. Within 15 seconds of the restoration of external or generator power the system automatically resets to normal operation and the critical backup function is immediately available to provide further protection. The system is capable of sending an automatic signal to a PC to warn of external / generator power failure and this can be utilised by system developers to create a simple software routine to initiate a fully automatic back up of data and close down procedure for delicate equipment.