45kVA transfromer controlled by a contactor
45kVA transfromer controlled by a contactor
(OP)
Are there any effects on a 45kVA transformer if the primary is switched on-off few times throughout a day?
In order to siplify wiring, owner wants to control lighting panel by turing on-off the whole lighting panel via contactor on MCC; i.e. having primary side of the transformer is swiched on-off at least 2 times a day. Would this reduce the life of the transformer by this frequent magnetization of the transformer; is it necessary to specify specific transformer?
In order to siplify wiring, owner wants to control lighting panel by turing on-off the whole lighting panel via contactor on MCC; i.e. having primary side of the transformer is swiched on-off at least 2 times a day. Would this reduce the life of the transformer by this frequent magnetization of the transformer; is it necessary to specify specific transformer?






RE: 45kVA transfromer controlled by a contactor
Alan
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"It's always fun to do the impossible." - Walt Disney
RE: 45kVA transfromer controlled by a contactor
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If we learn from our mistakes I'm getting a great education!
RE: 45kVA transfromer controlled by a contactor
RE: 45kVA transfromer controlled by a contactor
Why not to switch the secondary side of the transformer?
RE: 45kVA transfromer controlled by a contactor
It is a good question though! Don't know if the standards speak to this or not.
If it does shorten the life of the transformer, then by how much. I guess you would need to make an effort to quantify that cost and balance that cost against the cost of secondary switching of the load.
Alan
Democracy is two wolves and a sheep deciding what to have for dinner. Liberty is a well armed sheep!
Ben Franklin
RE: 45kVA transfromer controlled by a contactor
Having a switching contactor at secondary, would introduce additional cost since 45kVA (600V-208/120V)is a bit far from the source, 600V MCC.
RE: 45kVA transfromer controlled by a contactor
Alan
Democracy is two wolves and a sheep deciding what to have for dinner. Liberty is a well armed sheep!
Ben Franklin