The proven industry standard for over 10 years, the Autostart 700 provides fully automatic start up, load transfer, fault monitoring and shutdown of a stand-by diesel generator. Key features • Keyswitch selectable operating mode:- Auto, Test/Manual, Lamp Test or Off/Reset • 96 x 96mm DIN standard, front panel mounted case • 7 fault/status LED indicators:- mains fail, start fail, overspeed, low oil pressure, high engine temperature, charge fail, plant fail • Magnetic pickup or AC alternator speed sensing • Fully adjustable timer and control options Operation The 4 position, front facia keyswitch is used to select Autostart's operating mode. Green and red LEDs around the switch indicate the selection of Auto or Test (manual) modes. The key is common to all units and is removable in the Off and Auto positions only. Off/reset Removes all power from the unit and resets all alarms. Lamp test Lights all LEDs and activates a lamp test output. Operation otherwise as for Auto mode. Auto mode When Autostart and the generator are required to be on standby, positive DC must be applied to the mains failure terminal (pin 23). When a mains failure occurs, power is removed from pin 23 and Autostart waits for a user adjustable 'start delay'. If mains is restored in this period, the timer resets and the system returns to standby. If the mains supply remains failed, Autostart initiates an automatic start sequence, consisting of up to 9 engine crank/rest attempts, with each crank/rest 'pulse' period adjustable to give a maximum of 0.5 to 30 seconds. If a successful engine start is detected (engine speed above 40%), Autostart disengages and latches out the starter motor. If Autostart does not detect that the engine is running after the set number of start attempts, a 'start fail' fault is signalled. Once the engine is fully running - with speed above 90%, AC voltage above 66%, and oil pressure good - Autostart attempts to load the generator by activating it's Load Relay. A mains return is signalled by re-applying battery positive to pin 23. The generator continues to run on load until the end of the user adjustable 'change-back' delay. Autostart then takes the generator off load, but allows it to run on for an adjustable 'cool' time before stopping the engine and returning the system to standby. |