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This is first time I am dealing with something what is not instrumentation. Maybe my questions are iritating, but it is way of learning...

motor picture 1/2http://files.engineering.com/getfile.aspx?folder=85168c54-fb69-41c9-bd46-874050def1f1&file=Capture1.PNG

Ok, I got all documentation maybe not in best languages. See link for vfd http://invertek.com.au/ODE-2-24150-3KA4X.html?sc=2&category=16748 See attachments for motor 2/2http://files.engineering.com/getfile.aspx?folder=831db8e8-9b44-4f58-b784-cdaa6d9b3e05&file=Capture2.PNG

Warros I have to use vfd. Kr

Brian thank you. I understand now the range of frequency better. Is it practice to connect 2kw motors in delta over vfd? It has to be simple. Problem is technical documentation which is very bad. There is hard to find answers... You can search on sodeca web page and you will find nothing...

Forum is here to ask stupid questions and answering on them correctly or incorrectly. There is no reason for arguing... Who know is it my school project maybe? Does anyone from here can answer me on question? If there is no enough informations please ask me... Do not think on ex zone vents are...

OK, I get you technical charactertistics of fans, also maximamal airflow (m3/h) for every fan is: MAX1. 10650 m3/h MAX2. 12750 m3/h I realised that with fvd I will use only one type of connection or star or delta. If I want provide those two maximal airflows, which type of...

Dont worry I will not do what you say without checking it with qval. Person... Here i am to find direction for solution

I have been never working with vfd s. So i have questions... I need to find out min and max rated speed of motors after that i need to calculate which speeds i need for my needs and thats all. If star is higher (400V) I connect it like star only. This should be simple like this. Any other...

Thank you on your answer... It means I can connect motor as delta? For first speed I use lower frequency and for max speed I use 50Hz? What is usual practice in those situations? Kind regards

Dear Friends, I need technical solution for my problem; Specification: I have two motors, type: 1. HCT/ATEX 45-2T-2 (R/MIN=2800), (400V-3,60A), (KW-1,50) 2. HCT/ATEX 45-2T-3 (R/MIN=2860), (400V-5,00A), (KW-2,20) Also, every motor has its own inverter: Inverters are from INVERTEK DRIVES...