Tap Changer Manual Raise / Lower
Tap Changer Manual Raise / Lower
(OP)
The existing engineering on our tap changer unit has a 5.1kohm, 10W resistor placed on both the manual raise and on the manual lower points.
The only reason I could see doing this would be for voltage loss but theirs nothing that is telling me there would be any.
Any ideas.
The only reason I could see doing this would be for voltage loss but theirs nothing that is telling me there would be any.
Any ideas.






RE: Tap Changer Manual Raise / Lower
If the voltage for the on the source side of the manual push buttons is higher than the rating of the Auxiliary relays the resistor could to provide a voltage drop and hence the rated voltage across the Auxiliary Relay. The higher wattage rating of the resistor makes me think this could be the designed use.
Compare this to where the Raise/Lower circuitry receives it voltage from the automated tapchanger control. Does it use the same supply?
This is not an idea situation but liveable if the manual points are only used rarely.
RE: Tap Changer Manual Raise / Lower
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If we learn from our mistakes I'm getting a great education!
RE: Tap Changer Manual Raise / Lower
RE: Tap Changer Manual Raise / Lower
----------------------------------
If we learn from our mistakes I'm getting a great education!
RE: Tap Changer Manual Raise / Lower
Thanks for the comments.