K
Hi Everyone,
I have some questions which have been puzzling me. Hope to get some idea.
I keep a few stock item of VSD, I was told before using them, if store for a long period of time I need to do a "pre-charge" by using DC supply to its DC bus before supplying AC from incoming mains?
1. Is there a guideline how long VSD can be stored?
2. Is it necessary to go through such proceedures? Myth or logic?
3. If powering from DC can prevent damages of VSD, why is there no proper connection terminal for this purpose?
Thanks
Regards
K C Oh
I have some questions which have been puzzling me. Hope to get some idea.
I keep a few stock item of VSD, I was told before using them, if store for a long period of time I need to do a "pre-charge" by using DC supply to its DC bus before supplying AC from incoming mains?
1. Is there a guideline how long VSD can be stored?
2. Is it necessary to go through such proceedures? Myth or logic?
3. If powering from DC can prevent damages of VSD, why is there no proper connection terminal for this purpose?
Thanks
Regards
K C Oh