title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

AC-DC Power Supplies Medical Type GHA700F Instruction Manual1.8 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 a unit for isolation between the input and output,input and the terminal FG or between the output and the terminalFG, short-circuit between the output and the terminals RCG, PGGand AUXG.3 TemperatureMeasurement Point!Cooling methodConduction cooling, forced air and convection cooling are available.The combination of the cooling method makes mechanical designfl exible.2 Series Operation andParallel OperationFAN: case: Heat dissipation2.1 Series Operation6)conduction cooling + forced air(Variable speed FAN)!Series operation is available by connecting the outputs of two ormore power supplies with the same output voltage, as shown below.Output current in series connection should be lower than thelowest rated current in each unit.Remarks :Please be sure to have enough cooling in case one of the powersupply stops due to activation of the protection circuitry.Power +Supply -Power +Supply -LoadPower +Supply -Power +Supply -LoadLoadCombinationSeal caseFAN1)convection2)conduction cooling3)forced airCombinationCombinationFig.2.1 Examples of connecting in series operation2.2 Parallel Operation4)convection + conduction cooling5)conduction cooling + forced air!Parallel operation is not possible.!Redundancy operationRedundancy operation is available by wiring as shown below.PowerSupplyPowerSupply+-+-I1I2I3LoadFig.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 valuePlease evaluate carefuly and test for any possible failure modes.!Hot-swap or Hot-plug is not available.Fig.3.1 Cooling method CombinationIn order to determine if the power supply operates according toour specifi cations, the maximum operating temperature and temperaturemeasuring points are shown in table 3.1 and 3.2, for reference.Remarks:!For proper operation of the power supply, please note the following:-The temperature rise and heat dissipation of the converter must beconsidered.-Conditions varies with environment and input voltage.-Mounting surface will be very hot during the operation, so pleasebe careful not to touch the surface.-GHA700F series can achieve the efficient heat dissipation bycombining Conduction cooling and Forced air cooling. However, ifthe cooling fan stops due to the fan failure or other reason, OverTemperature Protection may not be activated due to the conductioncooling, and then the components temperature which are cooled byforced air would become high. Please ensure fail safe function ofyour product, and consult us for more details.GHA-25