Multiplying Factor for Calculating Energy

Once you have a drawing of what you are trying to do, the rest is arithmetic.

We used to have an abbreviation for undefined acronyms and abbreviations. Where is that old posting when you need it?

After reading the posting 3 times I suspect you are asking about the turns ratio in a transformer for an electrical power meter. Is that correct?

MF = MotherF%&£@

"We used to have an abbreviation for undefined acronyms and abbreviations. Where is that old posting when you need it?"

Are you thinking of undefined TLA's?

Those are three letter acronyms... or two letter acronyms... or ten letter acronyms...

BA - Biletter acronym

TLA - Three letter acronym

FFLA - Fuqin Four Letter Acronym

MFFLA - Mutha Fuqin Five Letter Acronym

WNGSLA - Worthless No Good Six Letter Acronym

SOABSLA - Son of a Beach Seven Letter Acronym

.....

Or 12-letter anagrams like WANGLYDIAPLT?

WAGLYDIANPLT!

"by changing the CT ratio now what effect will it make on MF.?"

It becomes a BMF.

This might be what I was thinking of: http://cr4.globalspec.com/thread/2446/CRIMINAL.

You might get the answer in my previous response at http://cr4.globalspec.com/thread/36700/M-F-in-Electricity-bill

For your convenience, I copied and pasted it here:

**********

M.F is for Multiplying Factor

It is the factor that is used to multiply the reading of the energy meter to get the actual energy consumption. If the M.F is 10, and the energy meter reading difference (the difference is used because energy meter reading is cumulative) is 45 for a period. The actual energy used for the period is 45x10 = 450 KWH.

M.F value is written on the front dial of the energy meter. However, there may be different cases:

Case 1: The energy meter front dial doesn't have any M.F value or CT ratio and the meter is used without CT.

The M.F is 1 in this case, so the actual energy used for a period is equal to meter reading difference for the period.

Case 2: The energy meter front dial does have M.F value but no CT ratio: and the meter is used without CT.

The actual energy used for a period is equal to meter reading difference for the period multiplied by meter M.F.

Case 3: The energy meter front dial does have M.F value and CT ratio; and the meter is used with CT of same ratio.

The actual energy used for a period is equal to meter reading difference for the period multiplied by M.F.

Case 4: The energy meter front dial does have M.F value and CT ratio (example 100/5A); and the meter is used with CT of different ratio (example 200/5A).

In this case,

Actual M.F = Meter M.F x (200/100) = Meter M.F x 2.

The actual energy used for a period is equal to meter reading difference for the period multiplied by Actual M.F.

Case 5 (rare case but may happen): The energy meter front dial doesn't have any M.F value or CT ratio but the meter is used with a CT (say 20/5A).

In this case,

Actual M.F = CT ratio

So the actual energy used for a period is equal to meter reading difference for the period multiplied by CT Ratio.

There are more similar cases for PT ratio as well (but the logic is similar to CT ratio).

- MS