title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

AC-DC Power Supplies Medical TypeInstruction Manual???? Film capacitor 0.1?F?????Aluminum electrolytic capacitor 47?FFig.3.1 Measuring method of Ripple NoiseRemarks : When measuring output ripple noise with an oscilloscope,do not let the oscilloscope’s GND cable cross themagnetic flux from the power supply. Otherwise there may beelectrical potential generated on the GND cable and the measuringresult may not be accurate.PowerSupplyBad example3.6 IsolationOsilloscope/Ripple noise meterBw:20MHzProbe+Vout-VoutC1150mmGood exampleFig.3.2 Example of measuring output ripple noise■For a receiving inspection, such as Hi-Pot test, gradually increase(decrease) the voltage for the start (shut down). Avoid using Hi-Pot tester with the timer because it may generate voltage a fewtimes higher than the applied voltage, at ON/OFF of a timer.3.7 Low Power ConsumptionLoad■The power supplies are designed for low power consumption atno load.■When the load factor is low (Io=0~20%typ), the switching powerloss is reduced by burst operation, which will cause ripple noiseto go beyond the specifications.■Ripple noise during burst operation will change depending onthe input voltage and the output current. Consult us for adviceon how to reduce ripple noise.■When there is a need to measure the stand-by power consumption,measure it by using the average mode of the tester. The measuring environmentmay influence the result. Consult us for more details.C2PowerSupply+Differential probeDifferential probe4 Series Operation andParallel Operation4.1 Series Operation■The power supplies can be used in series connection. The outputcurrent in series operation must be lower than the rated current ofthe power supply with the lowest rated current among the powersupplies connected in series. Make sure no current exceeding therated current flows into a power supply.Power +Supply -Power +Supply -LoadPower +Supply -Power +Supply -Fig.4.1 Examples of connecting in series operation4.2 Parallel Operation■Redundant operation is possible by wiring as shown below.PowerSupplyPowerSupply+-+-I1I2I3LoadFig.4.2 Example of redundancy operation■Even a slight difference in output voltage can affect the balancebetween the values of I1 and I2.Make sure the value of I3 does not exceed the rated output currentof the power supply.l3 [ the rated current value■Parallel operation is not possible.5 Cleaning■Cleaning agents : IPA (Solvent type)■Cleaning period : When cleaning the unit, the unit must be washed■After cleaning, dry them enough.LoadLoadwith a brush, and IPA must be kept out of the unit.May 09, 2025UMPS-10