stored energy motor operating mechanisms
stored energy motor operating mechanisms
(OP)
When testing a motor control centre, i came across a stored energy motor operator (ABB ISDAO for S6-57 or some thing like that) The closing operation is instantaneous after applying signal on "close" input. The open operation takes plase after few seconds of "open"input signal as there is no stored energy for opening operation.
I can understand practical difficulties for not having instantaneous action on both "open" and "close" operations. But my logic is, it is the " open" operation the one that need fast response. (In fact i instructed the emergency off button to be connected to the tripping circuit as few seconds delay can not be allowed.)
I do not think ABB has overlooked this point, but beleve there is a strong reason against my logic.
Can any one of you have any explanation?
I can understand practical difficulties for not having instantaneous action on both "open" and "close" operations. But my logic is, it is the " open" operation the one that need fast response. (In fact i instructed the emergency off button to be connected to the tripping circuit as few seconds delay can not be allowed.)
I do not think ABB has overlooked this point, but beleve there is a strong reason against my logic.
Can any one of you have any explanation?






RE: stored energy motor operating mechanisms
First of all, You are totally right!!!
Somthing starnge.
Maybe it's some misunderstanding, try ask to ABB.
standard cycles are O-C or O-C-O ( open, close).
Best Regards.
Slava
RE: stored energy motor operating mechanisms
RE: stored energy motor operating mechanisms
I see it's new ABB Tmax MCCB.
If you have some problem ask ABB, tommorow I'll ask our local ABB person.
Regards.
Slava
RE: stored energy motor operating mechanisms
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If we learn from our mistakes I'm getting a great education!
RE: stored energy motor operating mechanisms
RE: stored energy motor operating mechanisms
RE: stored energy motor operating mechanisms
RE: stored energy motor operating mechanisms
Regards,
JB