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Hi davidbeach and waross, Thank all of you for enlighting me. I think I got the point that you explained. Regards

Hi davidbeach, Are you trying to say that 2 single core cable per phase,in 3 phase system can be called 'one circuit'? And it doesn't need derating factor? Likewise, 3 single core cable per phase,3 phase system also can be called 'one circuit',right? Becasue I still do not have clear picture...

Hi wilsonv (Electrical) I have same idea that you have. And I know a bit of VB6 but I am not able to program it. I read a couple of VB books and sample programmes but so far no clue. How is your 'project' so far? Appreciate it if you can share your experience. Or anybody has any suggestion? Any...

Hi ScottyUK, Thank you for your reply. Again appreciate it if you can explain what one circuit mean.Because I have confussion about "one circuit". Let me repeat my above question, a system (which supply to single load) has 8 nos of single core cables, in other words, 2 cables per phase plus 2...

ScottyUK How do you define "system" for above table? For example, a system has 8 nos of single core cables, in other words, 2 cables per phase plus 2 cables for neutral,do I need to use derating factor? scenerio 2: There are two system and each system is the same as above,then what will be the...

Hi AllanUK, Thank you for your inputs. However Pumps are located at non-hazardous area. Regards

Thank you, waross and itsmoked for your valuable inputs and quick response. Regards

Hi Presently, there are few set of pumps(motors) started by softstarters. Due to the changes of application, we need to use VSD instead of softstarter. The contractor explained that motor also need to be replaced as current motor(s) is not suitable for the VSD. My question here is that is it...

Hi I know that all of numerical relay have hi set function and I don't know how to use it. I mean, under what condition it is used and how to select the right setting. Or any web page, literature that I can look at it? I googled its use in the web and no satisfactory result.