Tapchanger drive on transformer

TCOL
Motor driven heavy flywheel, inertia drive of a tap changer on a transformer showing mechanics.
33kV / 11kV 7.5 MVA

Category:

Science & Technology

Tags:

• tapchanger
• transformer
• power
• electricity
• substation

[mysock351W]

What do these do? Boost or buck the voltage depending on the load?

[RODALCO2007]

@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.

[cortexedge]

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...

[RODALCO2007]

@cortexedge 4 or 5 times on average.Aa time delay is used to avoid unnecessary switching and wear and tear.

[cortexedge]

what's the voltage input/output of that transformer?

[RODALCO2007]

@cortexedge 33,000 / 11,000 Volts

[AG3304]

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.

[HDXFH]

@RODALCO2007 cool sound has a nice note to it

[RODALCO2007]

@HDXFH that is the 50 Hz hum of the transformer.

the motor starts at 0:19.

[HDXFH]

is that the motor humming like that or the transformer it is operating/ tapping?