Question { 64390 }

Explain RYB?

Answer

This are three phase.

R= Red
Y = Yellow
B= Blue

Question { BREB, 1932 }

What is PLL? what are it's advantages?

Answer

PLL is Phase Locked Lood.

It is a control system that generates an output signal whose phase is related to the phase of an input signal.

For details; search in wikipedia.

Question { Trimax, 4868 }

what is RR number Abbreviation energy meter

Answer

The Rr stands for Register Ratio.

The disc is connected to a shaft that has a worm gear on it. This worm gear meshes with a wheel-type gear. The Rr number is the number of turns this wheel gear makes in order to turn the first dial one revolution.

The Rr number seems to vary with different manufacturers as well as different styles. It's usually some dumb number too; like 13 8/9 or 11 5/7. Wouldn't something like 8 or 12 or even better 10 make more sense?!??