Switching and Protective Devices

The quality of your education and intellect is directly related to the effort you put into it. Do your own homework.

Both have the same number of words.

Each term structure contains the same three words; "unit", "switch" and "fuse"

The last word in each term is "unit"

The order of words on the remaining two words is different

To further add to JR's comment;

Unit has 4 letters

Fuse has 4 letters

Switch has 6 letters

Here is the formula:

6+4+4=14

4+6+4=14

You left off 4 + 4 + 6.

And if we ponder a sequential pattern in those digits alone, the next three digits in the sequence would be 8, 11 and 15.

"And if we ponder a sequential pattern in those digits alone, the next three digits in the sequence would be 8, 11, and 15."

Well there you have it

Actually, I omitted 4+4+6=14 because that would have equated to "Fuse Unit Switch" or "Unit Fuse Switch"

^{Didn't want to create more confusion}

There is a fundamental difference between a fused switch and a switched fuse in the UK.

But as you're not from the UK it's up to you to look at your local definitions.

A switched fuse will usually be only be found in very old gear.

To late for his homework Oh dear what a shame!

IEC is not easily accessible to students. So, it is not a fair examination question, unless it has been introduced into the syllabus now....

If the fuse is part of the moving system, it is referred to as a Fuse-switch (the 'disconnector' part is left out usually)