Assalamulaikum frieds, this time we will try to solve a problem, on a 3-phase diesel generator using the Smartgen controller.
The Machine Spesific data
Enggine : Dongfeng Cummins 6BTA5.9G2
PRIME 106 Kw at 1500 RPM
Generator : MAGNA PLUS Singronous Generator
80 KW
Controler : SmartGen HGM 6100 series
AVR : SE350Regulator
the problem is, the engine can only start for a while and then turns off again, and the gens under voltage alarm appears on the display
Okay guys, this is video part 1. Here I will describe the steps for making adjustments to an Automatic Volt Regulator, to overcome the generator set under voltage alarm problem, which appears on this Smartgen display
the generator that we are repairing at this time uses a voltage regulator of the se350 type
later we will make adjustments to the Voltage Adjuster trimpot point
What are the steps for adjusting this AVR, please check this video?
Come on, my friends, turn on the engine to make sure what the problem is
during normal conditions. if the engine RPM has reached 1500 and the frequency is 50 Hz. then the reading on Phase To neutral should read 220 Volts . and Phase To Phase Read 380 Volts
we can see here. that the engine RPM has reached 1,500. and the frequency is 50 Hz
But the voltage that is read from phase to neutral is sometimes only around 181 volts and phase to phase is only around 332 volts
because at the default setting the permitted low voltage is 196 volts, the controller turns off the engine by disconnecting the full relay
This is what causes the engine to stop and the generator under voltage alarm indicator appears on the display controller.
OK guys.. Thats The Problem . To Be solve That we have to make adjustments . to the Automatic Voltage Regulator. that is installed on the generator body .to make the appropriate voltage,
What are the steps for adjusting this AVR, please check this video?
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Okay friends, for the first step, for the time being we have to lower the Default Settings, in the Under Voltage alarm configuration, so that the controller does not protect the engine from turning off , when we make adjustments
press up and down button to move or change.
Press enter to input .
and press home to return
For that. next we enter into the setup parameter menu. Then enter the 4-digit password. then look for the Gens Under Voltage Alarm Settings menu. here the settings have been changed to 190 volts . to make adjustments to the AVR settings, while we lower them first to 100 volts
which is no less important before making adjustments, we must make sure the main breaker on this generator is off
just to make sure, that the controller doesn't turn off the engine again, we wait a few moments. before making adjustments to the Automatic volt regulator
After that . we can restart the engine . to make adjustments to the Automatic Voltage regulator safely,
Okay, friends, we can see on the screen that the engine is still running normally, even though the voltage has dropped to almost 160 volts
Ok guys let's do it.
Make adjustments slowly.
to the Voltage Adjust trimpot points on the Automatic Volt Regulator.
while monitoring the display.
to get the voltage that should be 220 for Line To Neutral.
and 380 for Line To Line
After making adjustments to the AVR. we can see here that the voltage readings on the parameters. have been read very well. and that means we have solved the problem with this generator.
after this process is complete, don't forget to return the generator setting under voltage alarm to the parameter To 196 Volts again
please also watch video part 2, because there I explain how Solve the generator under voltage alarm , which is caused by Loose power Sensing
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