pt limit output VA meaning
pt limit output VA meaning
(OP)
i need to know what is the meaning of ( limit output=200VA ) written on the name plate of a potential transfomer of 6600/100 volt ratio, with a rated output of ( 30 VA ) this pt is single phase class=0.5 transformer.






RE: pt limit output VA meaning
RE: pt limit output VA meaning
in another pt name palte with two output coils of
(( 6600/square root(3),100/(sqare root(3),100/3 )) ratio, i read these data:
outlet terminal marking: a,n : da,dn
rated output (VA) : 30 : 50
accuracy class : 0.5 : 6P
----------------------------------------------------
limit output : 200 (VA)
now we have a two coils of 30&50 VA but also one limit output of 200 VA
could this limit output has a relation to the fuse connected to the input of potential transformer
thank you very much for any replay
RE: pt limit output VA meaning
It would be impractical - nearly impossible - to provide a primary fuse at 6.6kV which would limit the input to 200VA. Such fuses don't simply exist as far as I know.
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RE: pt limit output VA meaning
I agree with ScottyUK. The 200 VA, as you listed, just about has to be the thermal burden rating, which is to be considered total between the 2 windings.
In reality, I would suspect that the real thermal burden rating is much higher, but as you listed the nameplate data, that is about the only thing it could be.