如何計算該用多少 Amp 之 Fuse (in the BS1363 UK PLUG) 之公式說明如下:

LuoKen

出往英国带英插产品保险丝安培计算


如何計算該用多少 Amp
之 Fuse (in the BS1363 UK PLUG) 之公式說明如下:
I = P/V.
(Or
Power =Voltage*Current)
I = Ampere
安培 (電流,Current)
單位: A, (mA)
V = Voltage, 伏特
(電壓Voltage,)
單位: V,
P = Power.
(電功率,Power)
單位: W
例: UK 電源 AC 230V (電壓) , Power supplier, 300W. 所以 Fuse 該用
1.9 A.FUSE.
(300/230 =1.3 A,但一般計算需加計安全因素,故1.3A*1.5倍 = 1.9 A.)
BS1363 Plug Fuse 只有 3A,5A 10A,13A 四種陶瓷 FUSE. 故此例應選用 3A FUSE.
Some time when the machine (product) start to use the starting peak current will go higher then the stand by current (1.4142 times), So the 230V will go high to 325.26V.Then the value of the fuse should be using 1.38A fuse.
(300/325.26 =0.9 A. 0.9*1.5 =1.38 A). That's means the 3A FUSE is acceptable.


From, ken
Friday, September 12, 2008

hnsxpx555

了解一下了，没有真正接触过。

lingling12

学习中.谢谢.

waynson

吓，还有这样的，
长知识了……
谢谢！

Kenneth31

get something