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

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SECTION 5 | Principle of OperationThese inverters convert DC battery voltage to AC voltage with an RMS (Root MeanSquare) value of 120 VAC, 60 Hz RMS.The waveform of the AC voltage is a pure sine wave form that is same as the waveformof grid power (Supplementary information on pure sine waveform and its advantagesare discussed on pages 8 & 9).Fig. 5.1 below specifies the characteristics of 120 VAC, 60 Hz pure sine waveform. Theinstantaneous value and polarity of the voltage varies cyclically with respect to time. Forexample, in one cycle in a 120 VAC, 60 Hz system, it slowly rises in the positive directionfrom 0V to a peak positive value “Vpeak” = + 168.69V, slowly drops to 0V, changes thepolarity to negative direction and slowly increases in the negative direction to a peaknegative value “Vpeak” = - 168.69V and then slowly drops back to 0V. There are 60 suchcycles in 1 sec. Cycles per second is called the “Frequency” and is also termed “Hertz(Hz)”.++VPEAK = + 168.69VVRMS = 120 VACOV-TIME-VPEAK = - 168.69VFig. 5.1: 120 VAC, 60 Hz Pure Sine WaveformThe voltage conversion takes place in two stages. In the first stage, the DC voltageof the battery is converted to a high voltage DC using high frequency switching andPulse Width Modulation (PWM) technique. In the second stage, the high voltage DC isconverted to 120 VAC, 60 Hz sine wave AC again using PWM technique. This is done byusing a special wave shaping technique where the high voltage DC is switched at a highfrequency and the pulse width of this switching is modulated with respect to a referencesine wave.14 | SAMLEX AMERICA INC.
SECTION 6 | Layout12PST-1500 & PST-2000: FRONT1314LN1516PST-1500 & PST-2000: FRONT - showing compartment containing AC output terminals for hardwiring.PST-1500 & PST-2000: BACKLEGEND1. Power ON/OFF Switch2. Green LED - Power ON3. Red LED - Overload4. Red LED - Over Temperature5. NEMA5-20R GFCI Duplex Outlets6. Cooling Fan Opening7. Grounding Lug8. Negative (-) DC Input Terminal9. Positive (+) DC Input Terminal10. Modular Jack for RC-15ARemote Control11. Metal Strain Relief Clamp forAC Output Cable12. Cover Plate for Compartment ContainingAC Output Terminals13. Compartment Containing AC OutputTerminals for Hardwiring14. Terminal for AC Output Ground(Chassis Ground)15. AC Output: Line Terminal16. AC Output: Neutral TerminalFig. 6.1: Layout of PST-1500 and PST-2000SAMLEX AMERICA INC. | 15
Page 2 and 3: Owner's Manual | IndexSection 1 Saf
Page 4 and 5: Section 1 | Safety InstructionsPrev
Page 6 and 7: SECTION 2 | General InformationThe
Page 8 and 9: SECTION 2 | General Informationthe
Page 10 and 11: SECTION 2 | General InformationPowe
Page 12 and 13: SECTION 4 | Powering Direct / Embed
Page 16 and 17: SECTION 7 | General Information on
Page 30: SECTION 8 | InstallationDC Side Con
Page 36 and 37: SECTION 9 | Operationdesignated as
Page 38 and 39: SECTION 10 | ProtectionsThe inverte
Page 40 and 41: SECTION 11 | Trouble Shooting Guide
Page 42: SECTION 12 | SpecificationsModel No
Page 45 and 46: SECTION 12 | Specifications!CAUTION
Page 47 and 48: NOTES:SAMLEX AMERICA INC. | 47

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

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