Southern Metal Finishing

Re: A discussion on TAP-Switch Rectifiers

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lgianelos

Re: A discussion on TAP-Switch Rectifiers

It has always been my impression that tap switch rectifiers have low ripple only when the tap switches are within one number of each other. High ripple can be obtained if this scenario is not followed.

craighenry

Re: A discussion on TAP-Switch Rectifiers

You are correct, greater variation in tapswitch settings can increase ripple.  Since there is no advantage to having the switches offset by more than one position they should always be maintained that way.
However, the primary reason for maintaining switch positions is to protect the transformer from drawing power through one phase and overheating.

Peter van Gorp

Re: A discussion on TAP-Switch Rectifiers

A good alternative to Tap Switch Rectifiers is the Variable Ratio Transformer.
In addition to simplicity, reliability, low ripple etc. they are highly efficient, have neglectable wear and accurate control ( no steps ). Also adjustment is very easy.