The diagram shows a 230V mains power point, to which can be connected a 700W vacuum cleaner, a 2 kW fan heater and 800W microwave.
2007-06-21 23:11:17 · 6 answers · asked by Simona Sekulova 1 in Science & Mathematics ➔ Engineering
700 watts + 2000 watts + 800 watts = 3500 watts
Based on some measurements I've taken on all three of these devices, I happen to know that all three operate with a near unity power factor.
3500 watts = 3500 VA
3500 VA ÷ 230 V = 15.2 amps.
You did not state the fuse size, but based on experience I can tell you that in the real world, 15.2 amps will not blow a 15 amp fuse. There are minimum melt characteristics of the fuse, and the extra 0.2 amps will not cause it to operate.
2007-06-22 02:27:07 · answer #1 · answered by Thomas C 6 · 0⤊ 0⤋
You have to look at what electric panel is serving the connections listed above. From your description, it sounds like the three (3) devices are all fed from the same circuit. You will need to check the amperage of each device and then compare the total to the size of the circuit breaker or fuse. If the amperage draw exceeds the rating of the breaker or fuse then the breaker or fuse will be tripped/blown.
2007-06-22 08:33:38 · answer #2 · answered by rcfleche 3 · 0⤊ 0⤋
Altogether these appliances draw slightly over 15 Amps. That would not be enough to blow a 15 Amp fuse.
If the voltage went up to its proper value of 240 volts, then the fuse would definitely not blow.
.
2007-06-22 10:37:00 · answer #3 · answered by tlbs101 7 · 0⤊ 0⤋
You just need to calculate the total wattage of all the aplliances which in this case is 700 + 2000 + 800 =3500W
Then you have to calculate the total wattafe that can be supported by your mains power point. If the total wattage to be used is greater then the fuse will blow up.
2007-06-22 06:23:35 · answer #4 · answered by CrazyCoder 3 · 0⤊ 0⤋
if the 3 appliances are in parallel most probably the fuse will blow
as compared to the 3 appliances in parallel
2007-06-22 06:25:05 · answer #5 · answered by CPUcate 6 · 0⤊ 1⤋
What size fuse? No answer is possible without that information. Speculation, yes. An answer, no.
2007-06-23 03:28:35 · answer #6 · answered by ZORCH 6 · 0⤊ 0⤋