DC-AC Power Inverter Pure Sine Wave PST-1500 ... - DonRowe.com

SECTION 2 | General Informationfrequency harmonic content in a modified sine wave produces enhanced radio interference,higher heating effect in inductive loads like microwaves and motor driven deviceslike hand tools, refrigeration / air-conditioning compressors, pumps etc. The higherfrequency harmonics also produce overloading effect in low frequency capacitors due tolowering of their capacitive reactance by the higher harmonic frequencies. These capacitorsare used in ballasts for fluorescent lighting for Power Factor improvement and insingle-phase induction motors as start and run capacitors. Thus, modified and squarewave inverters may shut down due to overload when powering these devices.Advantages of Pure Sine Wave Inverters• The output waveform is a sine wave with very low harmonic distortion and cleanerpower like utility supplied electricity.• Inductive loads like microwaves, motors, transformers etc. run faster, quieterand cooler.• More suitable for powering fluorescent lighting fixtures containing power factorimprovement capacitors and single phase motors containing start and run capacitors• Reduces audible and electrical noise in fans, fluorescent lights, audio amplifiers, TV,fax and answering machines.• Does not contribute to the possibility of crashes in computers, weird print outs andglitches in monitors.Some examples of devices that may not work properly with modified sinewave and may also get damaged are given below:• Laser printers, photocopiers, and magneto-optical hard drives.• Built-in clocks in devices such as clock radios, alarm clocks, coffee makers, bread-makers,VCR, microwave ovens etc. may not keep time correctly.• Output voltage control devices like dimmers, ceiling fan / motor speed control maynot work properly (dimming / speed control may not function).• Sewing machines with speed / microprocessor control.• Transformer-less capacitive input powered devices like (i) Razors, flashlights, nightlights,smoke detectors etc. (ii) Re-chargers for battery packs used in hand powertools. These may get damaged. Please check with the manufacturer of these types ofdevices for suitability.• Devices that use radio frequency signals carried by the AC distribution wiring.• Some new furnaces with microprocessor control / Oil burner primary controls.• High intensity discharge (HID) lamps like Metal Halide lamps. These may get damaged.Please check with the manufacturer of these types of devices for suitability.• Some fluorescent lamps / light fixtures that have power factor correction capacitors.The inverter may shut down indicating overload.SAMLEX AMERICA INC. | 9