Ista AMF2.0 Operator's Manual

Automatic mains failure unit

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AMF2.0 automatic mains failure unit is a microprocessor based digital unit monitoring the 3

phases of the mains and controls the changeover of mains and generator contactors if a mains

failure on any phase is detected. The module offers a very cost effective and space saving

solutions as it is able to display all the parameters which are essential for the basic gen-set

control. The module has 3 operation modes.Stop, test and Auto operation modes can be

chosen via the push-buttons mounted on the front panel. While the module is in Stop mode, if

the menu button is pressed, the 41 parameter settings, which are used for controlling the

generator, can be adjusted. So the module can be adapted to all the generator without the need

of any other unit or module.

Features:



Micro-processor based design



Automatic engine starting and stopping



Automatic load transfer



Configurable via front panel



Automatic shut down on fault condition



Test mode



Operate with cranking dropouts



Preheat, auto ready and engine start outputs



Stop/fuel solenoid selection



3 phase true RMS voltage measuring and monitoring



Generator phase true RMS voltage measuring and monitoring



Generator frequency measuring and monitoring



Digitally adjustable low&high mains and generator voltage limits

AMF2.0 AUTOMATIC MAINS FAILURE UNIT

OPERATORS MANUAL

INTRODUCTION

AUX. OUT

AMF

2.0

TEST

AUX.

Automatic

Mains

Failure

AMF2.0/ENG/K.K/01

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Summary of Contents for Ista AMF2.0

Page 1 Mains Failure AMF2.0 automatic mains failure unit is a microprocessor based digital unit monitoring the 3 phases of the mains and controls the changeover of mains and generator contactors if a mains failure on any phase is detected. The module offers a very cost effective and space saving solutions as it is able to display all the parameters which are essential for the basic gen-set control.
Page 2  Digitally adjustable generator start timings  Digitally adjustable generator overspeed /underspeed limits  Digitally adjustable generator stop timings  Digitally adjustable generator failure control timings  Digitally adjustable auxiliary inputs specifications  Digitally adjustable auxiliary outputs specifications  Digitally adjustable preheat, cooling and load transfer timings ...
Page 3 Front View Display LEDs Display Menu Button Automatic Button Failure LEDs TE ST Test Button Off Button AUX . AUX . O UT Autom atic A M F Mains 2 .0 Failu re Mains Contactor LED Generator Contactor LED Display: By pressing the menu button in auto or test mode, the voltage and frequency parameters can be displayed on the unit.
Page 4 Mains Contactor Led: Mains contactor LED is activated when the unit energies the mains contactor .It blinks during the mains voltage safety time after the mains voltage returns. Generator Contactor Led: Generator contactor LED is activated when the unit energies the generator contactor .It blinks during the cooling time of the generator.
Page 5 OPERATION MODES OFF Mode: The module is placed into off mode by pressing off button. Off button is used for reseting alarm and failures. It is also used for stopping the engine. If off button is pressed while the module is in auto or test mode, the module will de-energies start relay, pre-heat relay and generator contactor output relay if they are energized and if the engine is running on load, the module allow the alternator to run off load to cool it adequately.
Page 6 If the mains voltage become outside of the acceptable limits, the module transfer the load from mains supply to generator. GENERATOR START SEQUENCE If the module requires starting the engine, the following sequence will occur: 1. Generator at Rest: While generator is at rest, there must be no generator voltage, frequency charge and oil pressure.
Page 7 7. Failure: When the module indicates any failure, it wouldn’t initiate start sequence unless reset the failures. By using off buttons, the indicated failures have to be reset to start cranking. INPUTS/OUTPUTS DC Supply Input: Battery + DC supply is connected to BATT+ terminal. Battery – DC supply is connected to BATT- terminal.
Page 8 Generator Contactor Relay Output: Generator contactor output is used for energizing the generator contactor to transfer load to the generator. It outputs R phase of the generator from its normally open terminal. Alarm Relay Output: Alarm output is used for indicating any failure event. It outputs battery + supply voltage.
Page 9 LED will illuminate and alarm output is energized. If the oil pressure remains high after maximum stopping time is expired, start/stop and LOP failure LEDs will illuminate and alarm output is energized. Charge Failure (shutdown or warning): If the module does not detect a voltage from the warning light terminal on the auxiliary charge alternator, the relevant failure LED will illuminate and alarm output is energised.The failure can be adjusted as a shutdown or warning failure by P26 number of parameter.
Page 10 Mains contactor delay Oil pressure control delay Fault control delay Generator frequency upper limit 53 Hz 40Hz 99 Hz Generator frequency lower limit 47 Hz 10 Hz 90 Hz Generator voltage upper limit 250V 350V Generator voltage lower limit 170V 250V Generator fault control delay Mains voltage lower limit...
Page 11 to start have been completed, the module will indicate start fail. P02 Starting Attempt Duration The engine is cranked for the duration of the starting attempt duration. (Crank Timer): P03 Waiting Duration Between If the engine not fire on the first attempt and the crank timer Starting Attempts(Crank expires, the module will rest the starter for the duration of the crank rest timer.
Page 12 P15 Generator Voltage Lower If the voltage of the generator output falls below generator voltage lower limit a shutdown is initiated. The module will Limit: indicate voltage failure. P16 Generator Fault Control If the generator voltage or frequency is out of acceptable limits, the module will wait during the generator fault control Delay: delay timer before indicating any alarm condition.
Page 13 P26 Charge failure type: a-red(Shutdown): If the module does not detect a voltage from the warning light terminal on the auxiliary charge alternator, the relevant failure LED will illuminate and alarm output is energised.The engine is stopped. b-yel(Warning): If the module does not detect a voltage from the warning light terminal on the auxiliary charge alternator, the relevant failure LED will illuminate and...
Page 14 this code. It can not be configured. P38 Test On Load: a-y(Yes): The module supplies the load in test mode. b-n(No):In test mode, if there is no failure in mains voltage, load is supplied by the mains voltage. In case of mains failure, the load is supplied from the generator.
Page 15 67x67mm Panel Cut Out Front panel mounted with rear metal screw fixings Mounting Installation Max. allowable mounting panel thickness 3mm DIMENSIONS AND MOUNTING Dimensions in mm...
Page 16 CONNECTIONS L O A D M A IN S G E N E R A T O R Ş G E N E R AT O R C O N T A C T O R R E L A Y M A IN S C O N T A C T O R R E L A Y A M F 2 .0...