Switching power supply (AC-DC) use notes and tips
??Fourth, in order to achieve full heat effect, generally installed in the air convection conditions good position or installed in the chassis shell through the shell will heat out.
??5, LED switching power supply factory before the addition of resistive load, if used in capacitive or emotional load, should be preceded by the order to explain
??Sixth, for the dual output symmetrical load, the preferred use of symmetrical output power
??Seven, the power supply FG ungrounded users, hand touch the shell or the output of Ma electrical feeling is a normal phenomenon, floating when the FG on the earth about 110V AC output, which is the power of the internal structure of the decision.
Power Usage Precautions:
First, the metal shell Power cord and the shell is generally connected with the ground (FG), to be reliable grounding, to ensure safety, can not be mistaken to the shell connected to the zero line.
??Second, before the installation is complete power test run, please re-check and proofread the wiring on the wiring, make sure that the input and output, AC and DC, single-phase and multi-phase, positive and negative, voltage and current value is correct Before they can run.
??Third, for high-power LED switching power supply, there are three or more than three "+" input terminals and "-" output terminals, in fact they belong to an output electrode, just to make the user easy to connect, and multiple terminals Respectively, in the internal and then together.
10, switching power supply in the factory to 100% full load aging, the general use of power control within 80% or in accordance with the requirements of the instructions. According to the temperature curve to develop power efficiency. The general temperature is increased by 10 ° and the capacitance life is reduced by half.
??11. Before using the switching power supply, make sure that the input voltage specification (110VAC or 220VAC, 24VDC or 48VDC ...) matches the nominal value of the switching power supply used.
8, AC input power supply definition Input power = output power / (input voltage * power factor * efficiency)
??9, sink leakage current: multiple power supply in use, the common intake of the same ground point, the total leakage current is composed of each unit of the leakage current composition, then to check the reliability of the protective grounding wire and grounding resistance is achieved Request to avoid electric shock.
