Transformer primary side VCB or or Load break switch?
Transformer primary side VCB or or Load break switch?
(OP)
As per load requirement transfomer has been sized as 1600KVA, 33KV primary and 440Volts seconadry,Dyn11,50Hz. ONAN(oil cooled).Primary tap off from the overhead wooden pole distribution line with load break switch(hand operated) and HRC fuses(25KA rated). My question is this transformer doen't require any Vacuum circuit breaker at primary side?can any one guide me that in which standard it has been detailed about the requirements of primary side protection, either load break switch(manual opertaed switch with HRC fuse links) or breaker?Isn't this transformer require oil , winding, buchholtz relay protection which can be provided with VCB or motor operted load break switch?






RE: Transformer primary side VCB or or Load break switch?
RE: Transformer primary side VCB or or Load break switch?
RE: Transformer primary side VCB or or Load break switch?
This is based on observations at dozens of petrochemical plants in this area, but the trend is toward more comprehensive protection systems.
Davidbeach points out that you should look for relevant codes and standards. If these are available, they determine what you must do. In the absence of those standards, then budget, complexity, criticality of loads, etc., all come into play in deciding.
old field guy
RE: Transformer primary side VCB or or Load break switch?