title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

AC-DC Power Supplies Open FrameInstruction Manual1.6 Output ripple and ripple noise!Output ripple noise may be infl uenced by measurement environment,measuring method fi g.1.1 is recommended.Osilloscope/Ripple noise meterBw:20MHz+Vout-VoutC1 : Film capacitor 0.1μFC1C2150mmC2 : Aluminum electrolytic capacitor 22μFRemarks :+LoadDifferential probeFig.1.1 Measuring method of Ripple and Ripple NoiseWhen GND cable of probe with fl ux of magnetic force from powersupply are crossing, ripple and ripple noise might not measurecorrectly.Please note the measuring environment.2 Series Operation andParallel Operation2.1 Series Operation!You can use a power supply in series operation. The output currentin series operation should be lower than the rated current of apower supply with the lowest rated current among power suppliesthat are serially connected. Please make sure that no current exceedingthe rated current fl ows into a power supply.Power +Supply -Power +Supply -(a)LoadPower +Supply -Power +Supply -(b)Fig.2.1 Examples of connecting in series operation2.2 Parallel OperationLoadLoad!Parallel operation is not possible.!Redundancy operation is available by wiring as shown below.PowerSupply+-I1I3Bad exampleGood exampleFig.1.2. Example of measuring output ripple and ripple noise1.7 Isolation!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.!When you test units for isolation between the input and output, orbetween output and terminal FG, short-circuit between output andremote ON/OFF connector.PowerSupply+-I2LoadFig.2.2 Example of redundancy operation!Even a slight difference in output voltage can affect the balancebetween the values of I1 and I2.Please make sure that the value of I3 does not exceed the ratedcurrent of a power supply.I3 [ the rated current value1.8 Reducing standby power!Burst operation at light loading, the internal switch element is intermittentoperated, and the switching loss is decreased.The specifi cation of the Ripple/Ripple Noise changes by this intermittentoperation. The value of the Ripple / Ripple Noise whenintermittent operates changes in the input voltage and the outputcurrent.? LHA100F, LHA150F, LHA300F!In option -R2, standby power with remote OFF is lower than theone with no load.Please refer to instruction manual 6.1.LHA-26