"usually it just runs over temp."
Why do you continue to refute that?
you're wrong. no you're stupid. well you're stupider so there.
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Why do you continue to refute that?
ggunn
PE (Electrical), NABCEP certified
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mivey
Senior Member
1000 kVA.I'd like to see how a utility would size their transformer to feed that load
Good. We seem to be finding some common ground.
And I still have the best dog in the universe............
You seem to miss the point of this thread. See post# 126.
The evidence is clear cut. The transformer goes overtemp.
Oh no. The OP question is about limitation of 840KVA for 875KVA transformer. That could be due to excessive voltage drop at 875 KVA rather than over temperature.
Perhaps you missed the smiley? No problem.
Anyway, the transformer is simply not big enough regardless of how Ing wants to manipulate his digits
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Um, I wasn't aware of any political comment.
The point is very simple. I, and others, have said the transformer simply isn't big enough.
I'm not asserting that it's the only problem.
Phil Corso
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Gentlepeople,
So far we've heard "stupid", and "stupider" in this never ending saga! I propose "stupidest"! Any takers (or leavers)? I suggest we vote?
Happy Thanksgiving to Celebrators (or is it Celebraters?)
Phil Corso
So far we've heard "stupid", and "stupider" in this never ending saga! I propose "stupidest"! Any takers (or leavers)? I suggest we vote?
Happy Thanksgiving to Celebrators (or is it Celebraters?)
Phil Corso
so the this is a case of bad engineering
and my manipulation of digits
at least I show the reasons for my position
show me where I err, the other post has te back-up
you just make stuff up and repeat the same thing expecting us to rest on your word
engineering does not work like that
motor 750-840
xfmr 875
no over heating
no issue
imo
not according to the op
he expected it to do so if overloaded (it did not and was not)
he was told it clamped at 840 kva
Tony S
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OK just to chuck another pebble in to pool. UK DNO’s (PoCo’s) rate their transformers for cyclic overload at 125% summer, 150% winter.
Following a transformer failure we ran its partner at 120% continuous for 3 months. It was a 2nd hand unit of venerable age acquired from a military base so solidly built. All we did was add a couple of fans blowing over the cooling radiators.
Following a transformer failure we ran its partner at 120% continuous for 3 months. It was a 2nd hand unit of venerable age acquired from a military base so solidly built. All we did was add a couple of fans blowing over the cooling radiators.
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xfmrs are robust devices
operated within their limits 25-50 yrs is not unheard of
even sustained ol's of 20-50% can be tolerated
that is why the info the op was relayed is not plausible
an 875 operated at 750-840 will not clamp output at 95% or less
Phil Corso
Senior Member
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Gentlepeople...
I have investigated three "Captive-Xfmr" starting failures in my career! In all 3 cases, Xfmr failure was traced to excessive Acceleration, Starting, or Runup time! Two of the three incidents had catastrophic results, i.e., meaning a change in the area's topography!
Phil Corso
I have investigated three "Captive-Xfmr" starting failures in my career! In all 3 cases, Xfmr failure was traced to excessive Acceleration, Starting, or Runup time! Two of the three incidents had catastrophic results, i.e., meaning a change in the area's topography!
Phil Corso
Yes according to the OP.
Why do you continue to dispute this fact?
you can have your own opinions but not your own facts
he did not say that
it did not fail due to over temp
in fact it did not over temp period
he got second hand info that output was clamped at 840, not plausible
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