To shed some light on this problem we need to get a brief understanding of how different appliances draw power. Basically electrical appliances can be split into three groups by the way they draw energy or current from a power source. These groups are Resistive, Inductive and Capacitive loads. To make it a little more confusing some appliances may even draw all three types of power!
Resistive Loads such as normal incandescent lights (wire filament like a light globe) always draw a constant power in watts from the power supply. For example a 60 Watt light globe will always draw 60 Watts from the power source at all times. For pretty obvious reasons resistive loads are by far the easiest appliances for an inverter to run as the power in Watts that they draw is the same and continues for the entire time the appliance is in operation.
Inductive Loads, such as a refrigerator or other devices with an electric motor, require a large rush of power (current surge) for the initial start and then once running will usually draw a lower and more constant power for the rest of their operation. Inductive loads contain coils of wire (for example motors, transformers, ballasts, solenoids etc) and when the power is initially turned on these coils of wire will draw a large surge of current which forms the magnetic field that will allow these electrical appliances to function correctly. This magnetic field (or lux as it is also known) is a kind of like stored energy.
The most common inductive appliances are fridges, followed by air compressors, transformers/chargers, pumps, power tools and fluorescent lights. Due to the required current surge these appliances can draw 2 to up to 6 times their normal running power to power up and be able to run so for example to power a 200 Watt fridge you may need a 600W or even a 1000W power inverter for it to function correctly.
Please be aware that there are some electrical appliances like large fridges and air conditioners that have very high start up current requirements because they have an inductive motor which must start under full load. It is strongly recommended that these appliances are not used with a power inverter as their start up current requirements is far too high and they should be powered by an engine driven generator.
Capacitive Loads such as a lot of televisions, computer monitors, power amplifiers and many other electronic appliances require a large surge current to start only when they haven’t been used for a some time. This is generally due to these devices having large capacitors in their power supplies that must be promptly charged when the appliance is turned on. If these electrical appliances are not used for a few days then the capacitors in their power supply will slowly leak power and go flat. You may be able to get these appliances to work by simply resetting the power inverter a couple of times which can charge up the capacitors enough so the appliance will power up, and once running should continue to function normally.
حساب مقطع الكابل الكهربائي المناسب
يسعدنا زيارتكم صفحاتنا على مواقع التواصل الاجتماعي حيث نقوم بنشر عروض حصرية على موقعنا الالكتروني.
صفحتنا علي الفيسبوك هنا.
حسابنا على تويتر هنا.
