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S8VK-G06012 Datasheet(PDF) 11 Page - Omron Electronics LLC |
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S8VK-G06012 Datasheet(HTML) 11 Page - Omron Electronics LLC |
11 / 22 page S8VK-G 11 Overvoltage Protection Consider the possibility of an overvoltage and design the system so that the load will not be subjected to an excessive voltage even if the feedback circuit in the Power Supplyfails. If an excessive voltage that is approximately 130% of the rated voltage or more is output, the output voltage is shut OFF. Reset the input power by turning it OFF for at least three minutes and then turning it back ON again. Note: Do not turn ON the power again until the cause of the overvoltage has been removed. Inrush Current, Startup Time, Output Hold Time Note: Twice the input current or above will flow during the parallel operation or redundant system. Therefore, check the fusing characteristics of fuses and operating characteristics of breakers making sure that the external fuses will not burn out and the circuit breakers will not be activated by the inrush current. Two phases application for Single phase models For All Single phase Models, S8VK-G Basically OMRON single phase power supply can be used on two- phases of a 3–phase-system when some of conditions satisfy like below. 1. The supplying voltage is below the maximum rated input. OMRON Power supply allows the input voltage equivalent or less than 240 VAC+10%. Please confirm the input voltage between two lines if the input voltage satisfies this condition before connecting. 2. The external protectoris needed on N input line to secure a safety. N line has no protection of a fuse internally. An appropriate fuse or circuit breaker should be connected on N input line like the following. Parallel Operation The parallel operation of S8VK-G is possible to increase the output power. However please consider the following notes when the parallel operation must be done. 1. The range of ambient temperature for Parallel operation is –25 to 40°C 2. Up to two of the same model can be connected in parallel. 3. Adjust the output voltage difference of each Power Supply to 50 mV or less, using the output voltage adjuster (V. ADJ). 4. There is no current balancing function for S8VK-G. A high output voltage unit may work at overcurrent state and in this situation, a life of a Power Supply will be extremely short. After adjusting the output voltage, confirm theoutput current of the two Power Supplies balances. 5. Using the parallel operation will not satisfy UL1310 Class2 output. 6. For Parallel Operation, to balance the current of the each unit, the length and thickness of each wire connected to the load and each unit must be same as much as possible. 7. For Parallel Operation with units 120 W or less, connect diodes or S8VK-R to the outputs of each unit if sudden load variation influence occurs in the ambient operation environment. Reference Value +15% −10% 0 V +30% (approx.) Overvoltage protection operating Variable range Rated output voltage The values shown in the above diagram is for reference only. 90% 96.5% Startup time (1,000 ms max.) AC input voltage AC input current Output voltage Inrush current on input application Input OFF Input ON Hold time (20 ms min.) Reliability (MTBF) Value Single phase model 15 W: 600,000 hrs 30 W: 580,000 hrs 60 W: 590,000 hrs 120 W: 450,000 hrs 240 W: 360,000 hrs 480 W: 230,000 hrs Definition MTBF stands for Mean Time Between Failures, which is calculated according to the probability of accidental device failures, and indicates reliability of devices. Therefore, it does not necessarily represent a life of the product. Life expectancy 10 yrs. Min. Definition The life expectancy indicates average operating hours under the ambient temperature of 40°C and a load rate of 50%. Normally this is determined by the life expectancy of the built-in aluminum electrolytic capacitor. A external fuse or a circuit breaker max. 240 VAC+10% Internal Fuse Power Supply N L L1 L2 L3 PE INPUT +V −V INPUT +V −V I1 IL IL = I1 + I2 I2 Load |
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