Inverter Unusual Behaviour

Read the operating manual step by step.. you will get.. because i also faced this problem....

i appreciate your suggestion but i have already read the whole manual and i am unable to conclude any thing moreover there is no error indication shown by the inverter :-)

I changed the Inverter, without asking any question.

I had similar issues with a Schneider USA model, could not get it past 50Hz, after about 2 months I swapped it out with an Emerson SK drive. Problem solved. I to read the manual.'Sorry to say this, engineers should not write manuals. The manual reads more like a bill in Congress. Completely senseless. I suggest swapping with a different MFG. This is a very small inexpensive unit.

I am going out on a limb with this suggestion, because this is not my professional field.

I believe that the 50 HZ setting is there, in order to match the inverter's output with the electrical device that it is powering. Therefore, in France, in Europe, you would set it to 50 Hz.

However, you are connecting the inverter to a motor. I know that it makes a difference whether the motor is an inductive motor or a ?????? something else.

I also know that there are various ways to adjust the speed of a motor, and one of them involves and electronic control which "clips" the electrical wave pattern into many pieces and "selects" more or less of each "clip" to send to the motor. If your inverter is generating 50 Hz by electronic means, rather than through diodes, you may have a feed-back problem between the inverter and the variable speed controller.

As I said, I am NOT really qualified to answer the question, but wanted to throw out some ideas to explore. I understand that you were able to get the motor working, using an different inverter. But you want to know why the other one didn't work, as you expected it to. I understand that.

thank you all for giving me ideas i appreciate it.

something also came in my mind about it is that what if its a manufacturing fault in which the SCR limits the voltage to a certain point above which i doesnt allows as i have contacted the Schneider electric france i mailed them the problem and also discussed it with my senior engineers and the conclusion that we have come to is that there is a problem in the SCR of the inverter............

From the start: If you swapped the Inverter with an identical one (same make and model/size), and the settings of all the parameters are the same, and the 2nd one worked fine while the 1st one is not working as required, then definitely if is defective! So why waste time beating round the bush unless you intend to repair the unit yourself and want advice on how to repair it: In this case, either you are very competent in the field and therefore we cannot help you better than yourself, or you should not attempt the repair because it could be dangerous for you or for the equipment and users.

I reckon you're right but I would also double check by defaulting the drive back to factory settings and then re-entering the few that are needed.

I hate to think how many times I've heard they're both the same to find out after some time that some other settings were different.

Also, some 'same' versions may have different settings, e.g. comparing an Asian software to EU or US and are the same drive with minor suffix addendum to note which it is.