On 2019/11/04 3:43 p.m., Phil Allison wrote:
wrote:

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"Otherwise" would be non-resistive loads - which would be reactive (capacitance) loads, or inductive (Motors and such) loads.

From another website, put simply:

When electricity flows through a circuit, there are points on the circuit, called loads, where energy is drawn away. Loads, in essence, are objects that use electricity--such as light bulbs. There are a variety of classification systems, but one way you can divide loads is into resistive, capacative, inductive or a combination of these types.

So:

A Variac "sees" a resistive load as a constant, whereas reactive and inductive loads will vary, so the amount of current the variac "sees" may be greater than the constant load at onset, shutdown, or when the load varies. Hence the derating.


** ROTFL

....

If Mr. Wieck is incorrect why not point out his errors instead of simply
insulting him?

We all make mistakes, but only adults know how to correct, admit to, and
deal with errors.



Peter Wieck


** Wot a know noting, f...

Let's get personal, eh? That works so well in a discussion.


Melrose Park, PA

** Must stink up the whole neighbourhood.


...... Phil


Sheesh...

John :-#(#