Static Excitation Pt. 1: Compound Boost Current Transformer
Static Excitation Pt. 1: Compound Boost Current Transformer
(OP)
Hi,
I at my work we got a static exciter for the rotor field
of our 5.5 MW generator. The exciter appears to be of
the 'compound' type e.g. potential + current transformer
shunted. The current transformer below is very unlike the
transformers i have seen before (the coil around the
wire). It seems to consist of a thick wire coil (primary)
sandwiched by 2 other coils.
Does someone know anything about this type of transformer
or excitation system? I need some information for a
report i am working on.
I at my work we got a static exciter for the rotor field
of our 5.5 MW generator. The exciter appears to be of
the 'compound' type e.g. potential + current transformer
shunted. The current transformer below is very unlike the
transformers i have seen before (the coil around the
wire). It seems to consist of a thick wire coil (primary)
sandwiched by 2 other coils.
Does someone know anything about this type of transformer
or excitation system? I need some information for a
report i am working on.






RE: Static Excitation Pt. 1: Compound Boost Current Transformer
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I don't suffer from insanity. I enjoy it...
RE: Static Excitation Pt. 1: Compound Boost Current Transformer
RE: Static Excitation Pt. 1: Compound Boost Current Transformer
I suspect that a high secondary current is required in your application (ie CT is not driving a relay or ammeter ) and so multiple turns on the primary winding were required.
RE: Static Excitation Pt. 1: Compound Boost Current Transformer
This thing actually has some kind of nameplate (on the backside!) which says:
H. 16-1-1
16-1-1
Z. 2-1
2-1 Y3
I assume that the numbers are the no. of windings, which corresponds to the photo. You can clearly see that the primary has 3 windings. I assume the transformer has the following configuration:
S S P S S
|18|3 3 3|18|
H Z Y Z H
This configuration makes things a bit complicated, because of magnetic coupling, which could be mitigated by the metal plate between the Z and H windings.Both the H and Z windings are shunted and connected in series in a way that derives the max amplitude.
Can someone show how to derive the pri/sec amplitude & phase charactaristics of this transformer?