How to Understand Electricity: Volts, Amps and Watts Explained on Appliances > 자유게시판

Finally, does either amperage or voltage have a greater effect on field or is a joint relationship where as voltage decreases amperage increases, to deliver the same wattage and that is what is measured by an electric meter? Is 220V really 2-110V legs out of phase with each other, pulsing the power to twice as many end points, effectively increasing the frequency to a nominal 120Hz, each leg serving as the other's return or ground, and if so, what is the phase angle relationship (e.g. 180 (my thought), or 90))? Does a 220V motor driven appliance that will operate down to 197V slow down and deliver less power or does it need more amps and use the same amount of watts? Q: Does a 220V motor driven appliance that will operate down to 197V slow down and deliver less power or does it need more amps and use the same amount of watts? Remember not all of your appliances are going to be switched on at the same time (e.g. 4 rings of a cooker plus oven probably wouldn't be on at the same time) so there would be weighting factors for each appliance.

Wow Ed, what a lot of questions, and by the way there are no dumb questions, just questions! There are three methods to do this. Fibrillation is when the muscle fibres of the heart are all contracting randomly rather than in sync, so they don't pump blood properly. Telephone and other communications cables are supported in the same manner. Each telephone cable contains several individual copper wire pairs; a large cable may contain as many as several hundred pair. Depending on the power company's billing policies, CATV power supplies may be metered, or they may be billed on a flat-rate basis. These amplifiers require operating power; this power (at 60, 75, or 90 volts RMS) is provided by a CATV power supply similar to the one shown here, and delivered to the amplifiers over the CATV network itself. A duplex bundle is normally used in situations where only a single 115-volt circuit is required; such circuits are typically provided for low-capacity loads such as streetlights and traffic signals.

Edmund King, AA president said: 'A perceived lack of charging points continues to be one of the top three reasons why drivers are hesitant to switch to electric cars. Martyn Allen, technical director at Electrical Safety First, says the survey show there is a 'direct link between a lack of electric vehicle infrastructure and vehicle owners charging dangerously'. But Im a non technical person. A spokesman for LV told us: 'If someone was to trip or fall over a charging cable and our customer was found legally responsible or negligent our policy would cover it under "liability to other people". 4. Ensure you frequently check your charging cable for wear and tear and replace it if any damage is evident. The amplifier housing also includes a power pack to accept power from the cable TV power supply and provide DC voltage to drive the amplifier modules. The supply transformer in the street is centre tapped and the centre tap is the neutral. If you live in an urban area, usually the transformer is quite "large" and has a high capacity but in a rural area, the transformer can be a small one on a pole and only capable of supplying a few homes.

A static wire. - A large transmission line, probably at least 69-Kv. - Secondary distribution wiring (both open-wire and triplex). Single-phase triplex secondary electric distribution. Question: What is the device used for controlling the flow of electricity in fridges and electric irons? Question: What supply voltage is required for a 100w bulb? Question: How many amps is 10 watts? Please calculate me electric watts. Answer: Multiply current in amps by voltage to calculate watts. 1. If power factor isn't corrected, excessive current can flow in a load which not only doesn't contribute to power used, what are electric cables but results in higher current flow in distribution cables. Also, lower current results in lower power losses in cables because a loss is proportional to a current squared. If you take one phase on the graph of phase voltage (line to neutral) versus time and multiply voltage by current for the phase, you get a positive result and this is the instantaneous power at that instant of time for that phase (assuming the load is real and power factor is 1.0). If you graphed the power versus time, the result would be in the form of a sin² graph with all values positive. So to work out amps, you would sum the wattages on each of the three phases (which are equal) and divide by √3 V line to get the line current.