@mysock351W Correct. They maintain the output voltage of the transformer at a steady level. In this case 11,000 Volts for the distribution transformers in the street.
The tapping is done at the 33,000 Volts side over 17 taps.
A 33,000 / 110 Volts VT is used for reference voltage.
And I guess you were changing the taps because of the electricity demand at that particular moment. By the way, about how many times a day the tap changer is used on a transformer?
Nice piece of kit.The older AC electric locos used a tap-changer in the UK,and ran on 25KV 50HZ.The tap-changer's job was to increase the voltage slowly for the traction motors,which ran on DC at about 1,000V.Some earlier ones had the old mercury arc rectifiers.
Well it's an old transformer tap changer! Good to see you preserving old machinery, Such an interesting motion it has. do you plan to put this back in full service?
I'm guessing it changes the primary taps on the transformer in response to load changes, to keep the secondary voltage relatively constant. Correct me if I'm wrong.
What do these do? Boost or buck the voltage depending on the load?
mysock351W 8 months ago
@mysock351W Correct. They maintain the output voltage of the transformer at a steady level. In this case 11,000 Volts for the distribution transformers in the street.
The tapping is done at the 33,000 Volts side over 17 taps.
A 33,000 / 110 Volts VT is used for reference voltage.
RODALCO2007 8 months ago
And I guess you were changing the taps because of the electricity demand at that particular moment. By the way, about how many times a day the tap changer is used on a transformer?
Please excuse my english...
cortexedge 8 months ago
@cortexedge 4 or 5 times on average.Aa time delay is used to avoid unnecessary switching and wear and tear.
RODALCO2007 8 months ago
what's the voltage input/output of that transformer?
cortexedge 8 months ago
@cortexedge 33,000 / 11,000 Volts
RODALCO2007 8 months ago
Nice piece of kit.The older AC electric locos used a tap-changer in the UK,and ran on 25KV 50HZ.The tap-changer's job was to increase the voltage slowly for the traction motors,which ran on DC at about 1,000V.Some earlier ones had the old mercury arc rectifiers.
AG3304 1 year ago
is that the motor humming like that or the transformer it is operating/ tapping?
HDXFH 1 year ago
@HDXFH that is the 50 Hz hum of the transformer.
the motor starts at 0:19.
RODALCO2007 1 year ago
@RODALCO2007 cool sound has a nice note to it
HDXFH 1 year ago
Very nice! Never seen bevore!
FeCr3 1 year ago
Still some like that on the system in the East Midlands (UK)
ihatnecksered 1 year ago
I just noticed something again, whats that white counter that reads "90351" at 0:47?
xXxmidgexXx 2 years ago
That is an event counter which counts the amount of tapchanges carried out.
From 52 seconds onwards is a different tapchanger from the other TX. has a different style counter too.
RODALCO2007 2 years ago
Well it's an old transformer tap changer! Good to see you preserving old machinery, Such an interesting motion it has. do you plan to put this back in full service?
steamboy51 2 years ago
The little contacts are for thye indication. The main contacts are in the tapchanger tank which is covered with oil.
You can see the grey shaft in between the slip rings and the clicking relay, that one drives the main contacts.
The TX is from the 1950's
RODALCO2007 2 years ago
that thing is sweet!
i dare ya to stick your finger in there...
lol jk.
cheetawolf 2 years ago
But what is it for?
BarneySaysHi 2 years ago
I'm guessing it changes the primary taps on the transformer in response to load changes, to keep the secondary voltage relatively constant. Correct me if I'm wrong.
soundspark 2 years ago
Correct.
Most transformers we use have 17 taps at the primary windings
RODALCO2007 2 years ago
Love that 50hz buzz. I could live all day next to a transformer with that sound lol xD!
xXxmidgexXx 2 years ago
likewise :-)
RODALCO2007 2 years ago
you wouldn't want to live next to it if it did this:
v=WkDCS8xeobg
laurdy 2 years ago