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Post by q8 on Jul 20, 2005 21:23:29 GMT
 I have been having PM's with our Russian member Dmitri and he has very kindly helped me. Now I want to return the favour as he has asked me a question to which I don't know the answer. The question is; What is the correct English term for the station where the change in the supply current type (e.g. 3000 VDC <-> 25000 VAC) occurs?
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Phil
In memoriam
RIP 23-Oct-2018
Posts: 9,473
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Post by Phil on Jul 21, 2005 8:21:16 GMT
Voltage changes are done by transformers in sub-stations
AC to DC is done by rectifiers integral with transformer
DC to AC is done by inverters, again usually built-in to the transformer.
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Post by compsci on Jul 21, 2005 8:28:41 GMT
I read that as having something to do with e.g. the Thameslink changing between overhead wires and the 3rd rail at Farringdon.
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Post by Dmitri on Jul 21, 2005 8:47:05 GMT
I read that as having something to do with e.g. the Thameslink changing between overhead wires and the 3rd rail at Farringdon. You're correct - it is what I've meant (we don't have 3rd rail on the mainline, so current is switched in the overhead wires). |
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Post by q8 on Jul 21, 2005 9:33:29 GMT
I think what Dmitri meands is what do call the points where the changeover takes place? Is it voltage change point or what?
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Post by compsci on Jul 21, 2005 9:38:27 GMT
Does this happen anywhere other than Farringdon and Drayton Park?
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Post by suncloud on Jul 22, 2005 9:44:34 GMT
It switches a few times on the North London...
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