電費計算: 你的電器每月電費開支多少?

電費計算: 你的電器每月電費開支多少?

Example : DSP-Z11
Full power off : (Turn off main switch) : 2.5W
Power on, no music : 100W
-20dB volume, 2 channel Pure Direct mode : 250W.

隔離牛班優先選購


You can calculate at below link:
http://c9web.com/family/cal_powerrate.php

呢件野用來度下D2手机有無暗病一流。

如果二手机標籤寫隹30W, 你度出來是50W, 要小心。
可能係電容口爆漏槳。

有一款是可連接電腦，(無線USB)，方便很多，吾駛扒低身，用電腦長時間log 住，睇峰值一流。

Modi, seem your loading is a inductive / capcitive load.

PFC around 0.5X, very poor.

Modi, seem your loading is a inductive / capcitive load.

PFC around 0.5X, very poor.

你部LCD LED TV 無 PFC !!!

Why PFC ?

http://openbookproject.net/electricCircuits/AC/AC_11.html

Example:

Why you found the reading is not same as calculation: Power = I x V  ?
V = 220
I = 0.286A
P = I x V = 62.9W   (It is True power)

This power meter can measure PFC value, the display of watt is using Apparent Power.
i.e. True power x Power factor value.
The display show 37.2W, that mean PFC value is around 0.59

Conclusion:
If the power meter don't have PFC display function, it will show you power reading of 62.9W
If the power meter have PFC display function, it will show you Apparent power of 37.2W

我試過五隻牌子，呢個(我果個)最接近十幾万power meter 的數字。

不過估吾到有假。

真的假不了
Fuse少不了

數字sir 你識吾識

Sam,

Anyway, 你下次上佢度問下佢點計啦，可能佢吾鐘意係網上答人，又或者佢真係吾sick.

呢D至係高手.

真的假不了, 安全最重要

Sam,

佢成個計算倒底有無用個腦諗過？

今晚教你計。

最重要你識計 Fuse.

Sam,

水要吾要我教, Or GND 呢?

有人搞吾清楚................